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/*
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Open Asset Import Library (assimp)
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*/
/** @file ColladaParser.cpp
* @brief Implementation of the Collada parser helper
*/
#ifndef ASSIMP_BUILD_NO_COLLADA_IMPORTER
#include <sstream>
#include <stdarg.h>
#include "ColladaParser.h"
#include "fast_atof.h"
#include "ParsingUtils.h"
#include "StringUtils.h"
#include <assimp/DefaultLogger.hpp>
#include <assimp/IOSystem.hpp>
#include <assimp/light.h>
#include "TinyFormatter.h"
#include <memory>
using namespace Assimp;
using namespace Assimp::Collada;
using namespace Assimp::Formatter;
// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
ColladaParser::ColladaParser( IOSystem* pIOHandler, const std::string& pFile)
: mFileName( pFile )
, mReader( NULL )
, mDataLibrary()
, mAccessorLibrary()
, mMeshLibrary()
, mNodeLibrary()
, mImageLibrary()
, mEffectLibrary()
, mMaterialLibrary()
, mLightLibrary()
, mCameraLibrary()
, mControllerLibrary()
, mRootNode( NULL )
, mAnims()
, mUnitSize( 1.0f )
, mUpDirection( UP_Y )
, mFormat(FV_1_5_n ) // We assume the newest file format by default
{
// validate io-handler instance
if ( NULL == pIOHandler ) {
throw DeadlyImportError("IOSystem is NULL." );
}
// open the file
std::unique_ptr<IOStream> file( pIOHandler->Open(pFile ) );
if (file.get() == NULL) {
throw DeadlyImportError( "Failed to open file " + pFile + "." );
}
// generate a XML reader for it
std::unique_ptr<CIrrXML_IOStreamReader> mIOWrapper(new CIrrXML_IOStreamReader(file.get()));
mReader = irr::io::createIrrXMLReader( mIOWrapper.get());
if (!mReader) {
ThrowException("Collada: Unable to open file.");
}
// start reading
ReadContents();
}
// ------------------------------------------------------------------------------------------------
// Destructor, private as well
ColladaParser::~ColladaParser()
{
delete mReader;
for( NodeLibrary::iterator it = mNodeLibrary.begin(); it != mNodeLibrary.end(); ++it)
delete it->second;
for( MeshLibrary::iterator it = mMeshLibrary.begin(); it != mMeshLibrary.end(); ++it)
delete it->second;
}
// ------------------------------------------------------------------------------------------------
// Read bool from text contents of current element
bool ColladaParser::ReadBoolFromTextContent()
{
const char* cur = GetTextContent();
return (!ASSIMP_strincmp(cur,"true",4) || '0' != *cur);
}
// ------------------------------------------------------------------------------------------------
// Read float from text contents of current element
ai_real ColladaParser::ReadFloatFromTextContent()
{
const char* cur = GetTextContent();
return fast_atof(cur);
}
// ------------------------------------------------------------------------------------------------
// Reads the contents of the file
void ColladaParser::ReadContents()
{
while( mReader->read())
{
// handle the root element "COLLADA"
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "COLLADA"))
{
// check for 'version' attribute
const int attrib = TestAttribute("version");
if (attrib != -1) {
const char* version = mReader->getAttributeValue(attrib);
if (!::strncmp(version,"1.5",3)) {
mFormat = FV_1_5_n;
DefaultLogger::get()->debug("Collada schema version is 1.5.n");
}
else if (!::strncmp(version,"1.4",3)) {
mFormat = FV_1_4_n;
DefaultLogger::get()->debug("Collada schema version is 1.4.n");
}
else if (!::strncmp(version,"1.3",3)) {
mFormat = FV_1_3_n;
DefaultLogger::get()->debug("Collada schema version is 1.3.n");
}
}
ReadStructure();
} else
{
DefaultLogger::get()->debug( format() << "Ignoring global element <" << mReader->getNodeName() << ">." );
SkipElement();
}
} else
{
// skip everything else silently
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads the structure of the file
void ColladaParser::ReadStructure()
{
while( mReader->read())
{
// beginning of elements
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "asset"))
ReadAssetInfo();
else if( IsElement( "library_animations"))
ReadAnimationLibrary();
else if (IsElement("library_animation_clips"))
ReadAnimationClipLibrary();
else if( IsElement( "library_controllers"))
ReadControllerLibrary();
else if( IsElement( "library_images"))
ReadImageLibrary();
else if( IsElement( "library_materials"))
ReadMaterialLibrary();
else if( IsElement( "library_effects"))
ReadEffectLibrary();
else if( IsElement( "library_geometries"))
ReadGeometryLibrary();
else if( IsElement( "library_visual_scenes"))
ReadSceneLibrary();
else if( IsElement( "library_lights"))
ReadLightLibrary();
else if( IsElement( "library_cameras"))
ReadCameraLibrary();
else if( IsElement( "library_nodes"))
ReadSceneNode(NULL); /* some hacking to reuse this piece of code */
else if( IsElement( "scene"))
ReadScene();
else
SkipElement();
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
break;
}
}
PostProcessRootAnimations();
}
// ------------------------------------------------------------------------------------------------
// Reads asset information such as coordinate system information and legal blah
void ColladaParser::ReadAssetInfo()
{
if( mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "unit"))
{
// read unit data from the element's attributes
const int attrIndex = TestAttribute( "meter");
if (attrIndex == -1) {
mUnitSize = 1.f;
}
else {
mUnitSize = mReader->getAttributeValueAsFloat( attrIndex);
}
// consume the trailing stuff
if( !mReader->isEmptyElement())
SkipElement();
}
else if( IsElement( "up_axis"))
{
// read content, strip whitespace, compare
const char* content = GetTextContent();
if( strncmp( content, "X_UP", 4) == 0)
mUpDirection = UP_X;
else if( strncmp( content, "Z_UP", 4) == 0)
mUpDirection = UP_Z;
else
mUpDirection = UP_Y;
// check element end
TestClosing( "up_axis");
} else
{
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "asset") != 0)
ThrowException( "Expected end of <asset> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads the animation clips
void ColladaParser::ReadAnimationClipLibrary()
{
if (mReader->isEmptyElement())
return;
while (mReader->read())
{
if (mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if (IsElement("animation_clip"))
{
// optional name given as an attribute
std::string animName;
int indexName = TestAttribute("name");
int indexID = TestAttribute("id");
if (indexName >= 0)
animName = mReader->getAttributeValue(indexName);
else if (indexID >= 0)
animName = mReader->getAttributeValue(indexID);
else
animName = std::string("animation_") + to_string(mAnimationClipLibrary.size());
std::pair<std::string, std::vector<std::string> > clip;
clip.first = animName;
while (mReader->read())
{
if (mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if (IsElement("instance_animation"))
{
int indexUrl = TestAttribute("url");
if (indexUrl >= 0)
{
const char* url = mReader->getAttributeValue(indexUrl);
if (url[0] != '#')
ThrowException("Unknown reference format");
url++;
clip.second.push_back(url);
}
}
else
{
// ignore the rest
SkipElement();
}
}
else if (mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if (strcmp(mReader->getNodeName(), "animation_clip") != 0)
ThrowException("Expected end of <animation_clip> element.");
break;
}
}
if (clip.second.size() > 0)
{
mAnimationClipLibrary.push_back(clip);
}
}
else
{
// ignore the rest
SkipElement();
}
}
else if (mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if (strcmp(mReader->getNodeName(), "library_animation_clips") != 0)
ThrowException("Expected end of <library_animation_clips> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Re-build animations from animation clip library, if present, otherwise combine single-channel animations
void ColladaParser::PostProcessRootAnimations()
{
if (mAnimationClipLibrary.size() > 0)
{
Animation temp;
for (AnimationClipLibrary::iterator it = mAnimationClipLibrary.begin(); it != mAnimationClipLibrary.end(); ++it)
{
std::string clipName = it->first;
Animation *clip = new Animation();
clip->mName = clipName;
temp.mSubAnims.push_back(clip);
for (std::vector<std::string>::iterator a = it->second.begin(); a != it->second.end(); ++a)
{
std::string animationID = *a;
AnimationLibrary::iterator animation = mAnimationLibrary.find(animationID);
if (animation != mAnimationLibrary.end())
{
Animation *pSourceAnimation = animation->second;
pSourceAnimation->CollectChannelsRecursively(clip->mChannels);
}
}
}
mAnims = temp;
// Ensure no double deletes.
temp.mSubAnims.clear();
}
else
{
mAnims.CombineSingleChannelAnimations();
}
}
// ------------------------------------------------------------------------------------------------
// Reads the animation library
void ColladaParser::ReadAnimationLibrary()
{
if (mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "animation"))
{
// delegate the reading. Depending on the inner elements it will be a container or a anim channel
ReadAnimation( &mAnims);
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "library_animations") != 0)
ThrowException( "Expected end of <library_animations> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads an animation into the given parent structure
void ColladaParser::ReadAnimation( Collada::Animation* pParent)
{
if( mReader->isEmptyElement())
return;
// an <animation> element may be a container for grouping sub-elements or an animation channel
// this is the channel collection by ID, in case it has channels
typedef std::map<std::string, AnimationChannel> ChannelMap;
ChannelMap channels;
// this is the anim container in case we're a container
Animation* anim = NULL;
// optional name given as an attribute
std::string animName;
std::string animID;
int indexName = TestAttribute( "name");
int indexID = TestAttribute( "id");
if (indexID >= 0)
animID = mReader->getAttributeValue(indexID);
if( indexName >= 0)
animName = mReader->getAttributeValue( indexName);
else if( indexID >= 0)
animName = animID;
else
animName = "animation";
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
// we have subanimations
if( IsElement( "animation"))
{
// create container from our element
if( !anim)
{
anim = new Animation;
anim->mName = animName;
pParent->mSubAnims.push_back( anim);
}
// recurse into the subelement
ReadAnimation( anim);
}
else if( IsElement( "source"))
{
// possible animation data - we'll never know. Better store it
ReadSource();
}
else if( IsElement( "sampler"))
{
// read the ID to assign the corresponding collada channel afterwards.
int indexID = GetAttribute( "id");
std::string id = mReader->getAttributeValue( indexID);
ChannelMap::iterator newChannel = channels.insert( std::make_pair( id, AnimationChannel())).first;
// have it read into a channel
ReadAnimationSampler( newChannel->second);
}
else if( IsElement( "channel"))
{
// the binding element whose whole purpose is to provide the target to animate
// Thanks, Collada! A directly posted information would have been too simple, I guess.
// Better add another indirection to that! Can't have enough of those.
int indexTarget = GetAttribute( "target");
int indexSource = GetAttribute( "source");
const char* sourceId = mReader->getAttributeValue( indexSource);
if( sourceId[0] == '#')
sourceId++;
ChannelMap::iterator cit = channels.find( sourceId);
if( cit != channels.end())
cit->second.mTarget = mReader->getAttributeValue( indexTarget);
if( !mReader->isEmptyElement())
SkipElement();
}
else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "animation") != 0)
ThrowException( "Expected end of <animation> element.");
break;
}
}
// it turned out to have channels - add them
if( !channels.empty())
{
// FIXME: Is this essentially doing the same as "single-anim-node" codepath in
// ColladaLoader::StoreAnimations? For now, this has been deferred to after
// all animations and all clips have been read. Due to handling of
// <library_animation_clips> this cannot be done here, as the channel owner
// is lost, and some exporters make up animations by referring to multiple
// single-channel animations from an <instance_animation>.
/*
// special filtering for stupid exporters packing each channel into a separate animation
if( channels.size() == 1)
{
pParent->mChannels.push_back( channels.begin()->second);
} else
*/
{
// else create the animation, if not done yet, and store the channels
if( !anim)
{
anim = new Animation;
anim->mName = animName;
pParent->mSubAnims.push_back( anim);
}
for( ChannelMap::const_iterator it = channels.begin(); it != channels.end(); ++it)
anim->mChannels.push_back( it->second);
if (indexID >= 0)
{
mAnimationLibrary[animID] = anim;
}
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads an animation sampler into the given anim channel
void ColladaParser::ReadAnimationSampler( Collada::AnimationChannel& pChannel)
{
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "input"))
{
int indexSemantic = GetAttribute( "semantic");
const char* semantic = mReader->getAttributeValue( indexSemantic);
int indexSource = GetAttribute( "source");
const char* source = mReader->getAttributeValue( indexSource);
if( source[0] != '#')
ThrowException( "Unsupported URL format");
source++;
if( strcmp( semantic, "INPUT") == 0)
pChannel.mSourceTimes = source;
else if( strcmp( semantic, "OUTPUT") == 0)
pChannel.mSourceValues = source;
else if( strcmp( semantic, "IN_TANGENT") == 0)
pChannel.mInTanValues = source;
else if( strcmp( semantic, "OUT_TANGENT") == 0)
pChannel.mOutTanValues = source;
else if( strcmp( semantic, "INTERPOLATION") == 0)
pChannel.mInterpolationValues = source;
if( !mReader->isEmptyElement())
SkipElement();
}
else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "sampler") != 0)
ThrowException( "Expected end of <sampler> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads the skeleton controller library
void ColladaParser::ReadControllerLibrary()
{
if (mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "controller"))
{
// read ID. Ask the spec if it's necessary or optional... you might be surprised.
int attrID = GetAttribute( "id");
std::string id = mReader->getAttributeValue( attrID);
// create an entry and store it in the library under its ID
mControllerLibrary[id] = Controller();
// read on from there
ReadController( mControllerLibrary[id]);
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "library_controllers") != 0)
ThrowException( "Expected end of <library_controllers> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads a controller into the given mesh structure
void ColladaParser::ReadController( Collada::Controller& pController)
{
// initial values
pController.mType = Skin;
pController.mMethod = Normalized;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
// two types of controllers: "skin" and "morph". Only the first one is relevant, we skip the other
if( IsElement( "morph"))
{
pController.mType = Morph;
int baseIndex = GetAttribute("source");
pController.mMeshId = mReader->getAttributeValue(baseIndex) + 1;
int methodIndex = GetAttribute("method");
if (methodIndex > 0) {
const char *method = mReader->getAttributeValue(methodIndex);
if (strcmp(method, "RELATIVE") == 0)
pController.mMethod = Relative;
}
}
else if( IsElement( "skin"))
{
// read the mesh it refers to. According to the spec this could also be another
// controller, but I refuse to implement every single idea they've come up with
int sourceIndex = GetAttribute( "source");
pController.mMeshId = mReader->getAttributeValue( sourceIndex) + 1;
}
else if( IsElement( "bind_shape_matrix"))
{
// content is 16 floats to define a matrix... it seems to be important for some models
const char* content = GetTextContent();
// read the 16 floats
for( unsigned int a = 0; a < 16; a++)
{
// read a number
content = fast_atoreal_move<ai_real>( content, pController.mBindShapeMatrix[a]);
// skip whitespace after it
SkipSpacesAndLineEnd( &content);
}
TestClosing( "bind_shape_matrix");
}
else if( IsElement( "source"))
{
// data array - we have specialists to handle this
ReadSource();
}
else if( IsElement( "joints"))
{
ReadControllerJoints( pController);
}
else if( IsElement( "vertex_weights"))
{
ReadControllerWeights( pController);
}
else if ( IsElement( "targets" ))
{
while (mReader->read()) {
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if ( IsElement( "input")) {
int semanticsIndex = GetAttribute("semantic");
int sourceIndex = GetAttribute("source");
const char *semantics = mReader->getAttributeValue(semanticsIndex);
const char *source = mReader->getAttributeValue(sourceIndex);
if (strcmp(semantics, "MORPH_TARGET") == 0) {
pController.mMorphTarget = source + 1;
}
else if (strcmp(semantics, "MORPH_WEIGHT") == 0)
{
pController.mMorphWeight = source + 1;
}
}
} else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "targets") == 0)
break;
else
ThrowException( "Expected end of <targets> element.");
}
}
}
else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "controller") == 0)
break;
else if( strcmp( mReader->getNodeName(), "skin") != 0 && strcmp( mReader->getNodeName(), "morph") != 0)
ThrowException( "Expected end of <controller> element.");
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads the joint definitions for the given controller
void ColladaParser::ReadControllerJoints( Collada::Controller& pController)
{
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
// Input channels for joint data. Two possible semantics: "JOINT" and "INV_BIND_MATRIX"
if( IsElement( "input"))
{
int indexSemantic = GetAttribute( "semantic");
const char* attrSemantic = mReader->getAttributeValue( indexSemantic);
int indexSource = GetAttribute( "source");
const char* attrSource = mReader->getAttributeValue( indexSource);
// local URLS always start with a '#'. We don't support global URLs
if( attrSource[0] != '#')
ThrowException( format() << "Unsupported URL format in \"" << attrSource << "\" in source attribute of <joints> data <input> element" );
attrSource++;
// parse source URL to corresponding source
if( strcmp( attrSemantic, "JOINT") == 0)
pController.mJointNameSource = attrSource;
else if( strcmp( attrSemantic, "INV_BIND_MATRIX") == 0)
pController.mJointOffsetMatrixSource = attrSource;
else
ThrowException( format() << "Unknown semantic \"" << attrSemantic << "\" in <joints> data <input> element" );
// skip inner data, if present
if( !mReader->isEmptyElement())
SkipElement();
}
else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "joints") != 0)
ThrowException( "Expected end of <joints> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads the joint weights for the given controller
void ColladaParser::ReadControllerWeights( Collada::Controller& pController)
{
// read vertex count from attributes and resize the array accordingly
int indexCount = GetAttribute( "count");
size_t vertexCount = (size_t) mReader->getAttributeValueAsInt( indexCount);
pController.mWeightCounts.resize( vertexCount);
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
// Input channels for weight data. Two possible semantics: "JOINT" and "WEIGHT"
if( IsElement( "input") && vertexCount > 0 )
{
InputChannel channel;
int indexSemantic = GetAttribute( "semantic");
const char* attrSemantic = mReader->getAttributeValue( indexSemantic);
int indexSource = GetAttribute( "source");
const char* attrSource = mReader->getAttributeValue( indexSource);
int indexOffset = TestAttribute( "offset");
if( indexOffset >= 0)
channel.mOffset = mReader->getAttributeValueAsInt( indexOffset);
// local URLS always start with a '#'. We don't support global URLs
if( attrSource[0] != '#')
ThrowException( format() << "Unsupported URL format in \"" << attrSource << "\" in source attribute of <vertex_weights> data <input> element" );
channel.mAccessor = attrSource + 1;
// parse source URL to corresponding source
if( strcmp( attrSemantic, "JOINT") == 0)
pController.mWeightInputJoints = channel;
else if( strcmp( attrSemantic, "WEIGHT") == 0)
pController.mWeightInputWeights = channel;
else
ThrowException( format() << "Unknown semantic \"" << attrSemantic << "\" in <vertex_weights> data <input> element" );
// skip inner data, if present
if( !mReader->isEmptyElement())
SkipElement();
}
else if( IsElement( "vcount") && vertexCount > 0 )
{
// read weight count per vertex
const char* text = GetTextContent();
size_t numWeights = 0;
for( std::vector<size_t>::iterator it = pController.mWeightCounts.begin(); it != pController.mWeightCounts.end(); ++it)
{
if( *text == 0)
ThrowException( "Out of data while reading <vcount>");
*it = strtoul10( text, &text);
numWeights += *it;
SkipSpacesAndLineEnd( &text);
}
TestClosing( "vcount");
// reserve weight count
pController.mWeights.resize( numWeights);
}
else if( IsElement( "v") && vertexCount > 0 )
{
// read JointIndex - WeightIndex pairs
const char* text = GetTextContent();
for( std::vector< std::pair<size_t, size_t> >::iterator it = pController.mWeights.begin(); it != pController.mWeights.end(); ++it)
{
if( *text == 0)
ThrowException( "Out of data while reading <vertex_weights>");
it->first = strtoul10( text, &text);
SkipSpacesAndLineEnd( &text);
if( *text == 0)
ThrowException( "Out of data while reading <vertex_weights>");
it->second = strtoul10( text, &text);
SkipSpacesAndLineEnd( &text);
}
TestClosing( "v");
}
else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "vertex_weights") != 0)
ThrowException( "Expected end of <vertex_weights> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads the image library contents
void ColladaParser::ReadImageLibrary()
{
if( mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if( IsElement( "image"))
{
// read ID. Another entry which is "optional" by design but obligatory in reality
int attrID = GetAttribute( "id");
std::string id = mReader->getAttributeValue( attrID);
// create an entry and store it in the library under its ID
mImageLibrary[id] = Image();
// read on from there
ReadImage( mImageLibrary[id]);
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "library_images") != 0)
ThrowException( "Expected end of <library_images> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads an image entry into the given image
void ColladaParser::ReadImage( Collada::Image& pImage)
{
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT){
// Need to run different code paths here, depending on the Collada XSD version
if (IsElement("image")) {
SkipElement();
}
else if( IsElement( "init_from"))
{
if (mFormat == FV_1_4_n)
{
// FIX: C4D exporter writes empty <init_from/> tags
if (!mReader->isEmptyElement()) {
// element content is filename - hopefully
const char* sz = TestTextContent();
if (sz)pImage.mFileName = sz;
TestClosing( "init_from");
}
if (!pImage.mFileName.length()) {
pImage.mFileName = "unknown_texture";
}
}
else if (mFormat == FV_1_5_n)
{
// make sure we skip over mip and array initializations, which
// we don't support, but which could confuse the loader if
// they're not skipped.
int attrib = TestAttribute("array_index");
if (attrib != -1 && mReader->getAttributeValueAsInt(attrib) > 0) {
DefaultLogger::get()->warn("Collada: Ignoring texture array index");
continue;
}
attrib = TestAttribute("mip_index");
if (attrib != -1 && mReader->getAttributeValueAsInt(attrib) > 0) {
DefaultLogger::get()->warn("Collada: Ignoring MIP map layer");
continue;
}
// TODO: correctly jump over cube and volume maps?
}
}
else if (mFormat == FV_1_5_n)
{
if( IsElement( "ref"))
{
// element content is filename - hopefully
const char* sz = TestTextContent();
if (sz)pImage.mFileName = sz;
TestClosing( "ref");
}
else if( IsElement( "hex") && !pImage.mFileName.length())
{
// embedded image. get format
const int attrib = TestAttribute("format");
if (-1 == attrib)
DefaultLogger::get()->warn("Collada: Unknown image file format");
else pImage.mEmbeddedFormat = mReader->getAttributeValue(attrib);
const char* data = GetTextContent();
// hexadecimal-encoded binary octets. First of all, find the
// required buffer size to reserve enough storage.
const char* cur = data;
while (!IsSpaceOrNewLine(*cur)) cur++;
const unsigned int size = (unsigned int)(cur-data) * 2;
pImage.mImageData.resize(size);
for (unsigned int i = 0; i < size;++i)
pImage.mImageData[i] = HexOctetToDecimal(data+(i<<1));
TestClosing( "hex");
}
}
else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "image") == 0)
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads the material library
void ColladaParser::ReadMaterialLibrary()
{
if( mReader->isEmptyElement())
return;
std::map<std::string, int> names;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "material"))
{
// read ID. By now you probably know my opinion about this "specification"
int attrID = GetAttribute( "id");
std::string id = mReader->getAttributeValue( attrID);
std::string name;
int attrName = TestAttribute("name");
if (attrName >= 0)
name = mReader->getAttributeValue( attrName);
// create an entry and store it in the library under its ID
mMaterialLibrary[id] = Material();
if( !name.empty())
{
std::map<std::string, int>::iterator it = names.find( name);
if( it != names.end())
{
std::ostringstream strStream;
strStream << ++it->second;
name.append( " " + strStream.str());
}
else
{
names[name] = 0;
}
mMaterialLibrary[id].mName = name;
}
ReadMaterial( mMaterialLibrary[id]);
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "library_materials") != 0)
ThrowException( "Expected end of <library_materials> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads the light library
void ColladaParser::ReadLightLibrary()
{
if( mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if( IsElement( "light"))
{
// read ID. By now you probably know my opinion about this "specification"
int attrID = GetAttribute( "id");
std::string id = mReader->getAttributeValue( attrID);
// create an entry and store it in the library under its ID
ReadLight(mLightLibrary[id] = Light());
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "library_lights") != 0)
ThrowException( "Expected end of <library_lights> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads the camera library
void ColladaParser::ReadCameraLibrary()
{
if( mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if( IsElement( "camera"))
{
// read ID. By now you probably know my opinion about this "specification"
int attrID = GetAttribute( "id");
std::string id = mReader->getAttributeValue( attrID);
// create an entry and store it in the library under its ID
Camera& cam = mCameraLibrary[id];
attrID = TestAttribute( "name");
if (attrID != -1)
cam.mName = mReader->getAttributeValue( attrID);
ReadCamera(cam);
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "library_cameras") != 0)
ThrowException( "Expected end of <library_cameras> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads a material entry into the given material
void ColladaParser::ReadMaterial( Collada::Material& pMaterial)
{
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if (IsElement("material")) {
SkipElement();
}
else if( IsElement( "instance_effect"))
{
// referred effect by URL
int attrUrl = GetAttribute( "url");
const char* url = mReader->getAttributeValue( attrUrl);
if( url[0] != '#')
ThrowException( "Unknown reference format");
pMaterial.mEffect = url+1;
SkipElement();
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "material") != 0)
ThrowException( "Expected end of <material> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads a light entry into the given light
void ColladaParser::ReadLight( Collada::Light& pLight)
{
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if (IsElement("light")) {
SkipElement();
}
else if (IsElement("spot")) {
pLight.mType = aiLightSource_SPOT;
}
else if (IsElement("ambient")) {
pLight.mType = aiLightSource_AMBIENT;
}
else if (IsElement("directional")) {
pLight.mType = aiLightSource_DIRECTIONAL;
}
else if (IsElement("point")) {
pLight.mType = aiLightSource_POINT;
}
else if (IsElement("color")) {
// text content contains 3 floats
const char* content = GetTextContent();
content = fast_atoreal_move<ai_real>( content, (ai_real&)pLight.mColor.r);
SkipSpacesAndLineEnd( &content);
content = fast_atoreal_move<ai_real>( content, (ai_real&)pLight.mColor.g);
SkipSpacesAndLineEnd( &content);
content = fast_atoreal_move<ai_real>( content, (ai_real&)pLight.mColor.b);
SkipSpacesAndLineEnd( &content);
TestClosing( "color");
}
else if (IsElement("constant_attenuation")) {
pLight.mAttConstant = ReadFloatFromTextContent();
TestClosing("constant_attenuation");
}
else if (IsElement("linear_attenuation")) {
pLight.mAttLinear = ReadFloatFromTextContent();
TestClosing("linear_attenuation");
}
else if (IsElement("quadratic_attenuation")) {
pLight.mAttQuadratic = ReadFloatFromTextContent();
TestClosing("quadratic_attenuation");
}
else if (IsElement("falloff_angle")) {
pLight.mFalloffAngle = ReadFloatFromTextContent();
TestClosing("falloff_angle");
}
else if (IsElement("falloff_exponent")) {
pLight.mFalloffExponent = ReadFloatFromTextContent();
TestClosing("falloff_exponent");
}
// FCOLLADA extensions
// -------------------------------------------------------
else if (IsElement("outer_cone")) {
pLight.mOuterAngle = ReadFloatFromTextContent();
TestClosing("outer_cone");
}
// ... and this one is even deprecated
else if (IsElement("penumbra_angle")) {
pLight.mPenumbraAngle = ReadFloatFromTextContent();
TestClosing("penumbra_angle");
}
else if (IsElement("intensity")) {
pLight.mIntensity = ReadFloatFromTextContent();
TestClosing("intensity");
}
else if (IsElement("falloff")) {
pLight.mOuterAngle = ReadFloatFromTextContent();
TestClosing("falloff");
}
else if (IsElement("hotspot_beam")) {
pLight.mFalloffAngle = ReadFloatFromTextContent();
TestClosing("hotspot_beam");
}
// OpenCOLLADA extensions
// -------------------------------------------------------
else if (IsElement("decay_falloff")) {
pLight.mOuterAngle = ReadFloatFromTextContent();
TestClosing("decay_falloff");
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "light") == 0)
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads a camera entry into the given light
void ColladaParser::ReadCamera( Collada::Camera& pCamera)
{
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if (IsElement("camera")) {
SkipElement();
}
else if (IsElement("orthographic")) {
pCamera.mOrtho = true;
}
else if (IsElement("xfov") || IsElement("xmag")) {
pCamera.mHorFov = ReadFloatFromTextContent();
TestClosing((pCamera.mOrtho ? "xmag" : "xfov"));
}
else if (IsElement("yfov") || IsElement("ymag")) {
pCamera.mVerFov = ReadFloatFromTextContent();
TestClosing((pCamera.mOrtho ? "ymag" : "yfov"));
}
else if (IsElement("aspect_ratio")) {
pCamera.mAspect = ReadFloatFromTextContent();
TestClosing("aspect_ratio");
}
else if (IsElement("znear")) {
pCamera.mZNear = ReadFloatFromTextContent();
TestClosing("znear");
}
else if (IsElement("zfar")) {
pCamera.mZFar = ReadFloatFromTextContent();
TestClosing("zfar");
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "camera") == 0)
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads the effect library
void ColladaParser::ReadEffectLibrary()
{
if (mReader->isEmptyElement()) {
return;
}
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if( IsElement( "effect"))
{
// read ID. Do I have to repeat my ranting about "optional" attributes?
int attrID = GetAttribute( "id");
std::string id = mReader->getAttributeValue( attrID);
// create an entry and store it in the library under its ID
mEffectLibrary[id] = Effect();
// read on from there
ReadEffect( mEffectLibrary[id]);
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "library_effects") != 0)
ThrowException( "Expected end of <library_effects> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads an effect entry into the given effect
void ColladaParser::ReadEffect( Collada::Effect& pEffect)
{
// for the moment we don't support any other type of effect.
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "profile_COMMON"))
ReadEffectProfileCommon( pEffect);
else
SkipElement();
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "effect") != 0)
ThrowException( "Expected end of <effect> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads an COMMON effect profile
void ColladaParser::ReadEffectProfileCommon( Collada::Effect& pEffect)
{
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "newparam")) {
// save ID
int attrSID = GetAttribute( "sid");
std::string sid = mReader->getAttributeValue( attrSID);
pEffect.mParams[sid] = EffectParam();
ReadEffectParam( pEffect.mParams[sid]);
}
else if( IsElement( "technique") || IsElement( "extra"))
{
// just syntactic sugar
}
else if( mFormat == FV_1_4_n && IsElement( "image"))
{
// read ID. Another entry which is "optional" by design but obligatory in reality
int attrID = GetAttribute( "id");
std::string id = mReader->getAttributeValue( attrID);
// create an entry and store it in the library under its ID
mImageLibrary[id] = Image();
// read on from there
ReadImage( mImageLibrary[id]);
}
/* Shading modes */
else if( IsElement( "phong"))
pEffect.mShadeType = Shade_Phong;
else if( IsElement( "constant"))
pEffect.mShadeType = Shade_Constant;
else if( IsElement( "lambert"))
pEffect.mShadeType = Shade_Lambert;
else if( IsElement( "blinn"))
pEffect.mShadeType = Shade_Blinn;
/* Color + texture properties */
else if( IsElement( "emission"))
ReadEffectColor( pEffect.mEmissive, pEffect.mTexEmissive);
else if( IsElement( "ambient"))
ReadEffectColor( pEffect.mAmbient, pEffect.mTexAmbient);
else if( IsElement( "diffuse"))
ReadEffectColor( pEffect.mDiffuse, pEffect.mTexDiffuse);
else if( IsElement( "specular"))
ReadEffectColor( pEffect.mSpecular, pEffect.mTexSpecular);
else if( IsElement( "reflective")) {
ReadEffectColor( pEffect.mReflective, pEffect.mTexReflective);
}
else if( IsElement( "transparent")) {
pEffect.mHasTransparency = true;
const char* opaque = mReader->getAttributeValueSafe("opaque");
if(::strcmp(opaque, "RGB_ZERO") == 0 || ::strcmp(opaque, "RGB_ONE") == 0) {
pEffect.mRGBTransparency = true;
}
// In RGB_ZERO mode, the transparency is interpreted in reverse, go figure...
if(::strcmp(opaque, "RGB_ZERO") == 0 || ::strcmp(opaque, "A_ZERO") == 0) {
pEffect.mInvertTransparency = true;
}
ReadEffectColor( pEffect.mTransparent,pEffect.mTexTransparent);
}
else if( IsElement( "shininess"))
ReadEffectFloat( pEffect.mShininess);
else if( IsElement( "reflectivity"))
ReadEffectFloat( pEffect.mReflectivity);
/* Single scalar properties */
else if( IsElement( "transparency"))
ReadEffectFloat( pEffect.mTransparency);
else if( IsElement( "index_of_refraction"))
ReadEffectFloat( pEffect.mRefractIndex);
// GOOGLEEARTH/OKINO extensions
// -------------------------------------------------------
else if( IsElement( "double_sided"))
pEffect.mDoubleSided = ReadBoolFromTextContent();
// FCOLLADA extensions
// -------------------------------------------------------
else if( IsElement( "bump")) {
aiColor4D dummy;
ReadEffectColor( dummy,pEffect.mTexBump);
}
// MAX3D extensions
// -------------------------------------------------------
else if( IsElement( "wireframe")) {
pEffect.mWireframe = ReadBoolFromTextContent();
TestClosing( "wireframe");
}
else if( IsElement( "faceted")) {
pEffect.mFaceted = ReadBoolFromTextContent();
TestClosing( "faceted");
}
else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "profile_COMMON") == 0)
{
break;
}
}
}
}
// ------------------------------------------------------------------------------------------------
// Read texture wrapping + UV transform settings from a profile==Maya chunk
void ColladaParser::ReadSamplerProperties( Sampler& out )
{
if (mReader->isEmptyElement()) {
return;
}
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
// MAYA extensions
// -------------------------------------------------------
if( IsElement( "wrapU")) {
out.mWrapU = ReadBoolFromTextContent();
TestClosing( "wrapU");
}
else if( IsElement( "wrapV")) {
out.mWrapV = ReadBoolFromTextContent();
TestClosing( "wrapV");
}
else if( IsElement( "mirrorU")) {
out.mMirrorU = ReadBoolFromTextContent();
TestClosing( "mirrorU");
}
else if( IsElement( "mirrorV")) {
out.mMirrorV = ReadBoolFromTextContent();
TestClosing( "mirrorV");
}
else if( IsElement( "repeatU")) {
out.mTransform.mScaling.x = ReadFloatFromTextContent();
TestClosing( "repeatU");
}
else if( IsElement( "repeatV")) {
out.mTransform.mScaling.y = ReadFloatFromTextContent();
TestClosing( "repeatV");
}
else if( IsElement( "offsetU")) {
out.mTransform.mTranslation.x = ReadFloatFromTextContent();
TestClosing( "offsetU");
}
else if( IsElement( "offsetV")) {
out.mTransform.mTranslation.y = ReadFloatFromTextContent();
TestClosing( "offsetV");
}
else if( IsElement( "rotateUV")) {
out.mTransform.mRotation = ReadFloatFromTextContent();
TestClosing( "rotateUV");
}
else if( IsElement( "blend_mode")) {
const char* sz = GetTextContent();
// http://www.feelingsoftware.com/content/view/55/72/lang,en/
// NONE, OVER, IN, OUT, ADD, SUBTRACT, MULTIPLY, DIFFERENCE, LIGHTEN, DARKEN, SATURATE, DESATURATE and ILLUMINATE
if (0 == ASSIMP_strincmp(sz,"ADD",3))
out.mOp = aiTextureOp_Add;
else if (0 == ASSIMP_strincmp(sz,"SUBTRACT",8))
out.mOp = aiTextureOp_Subtract;
else if (0 == ASSIMP_strincmp(sz,"MULTIPLY",8))
out.mOp = aiTextureOp_Multiply;
else {
DefaultLogger::get()->warn("Collada: Unsupported MAYA texture blend mode");
}
TestClosing( "blend_mode");
}
// OKINO extensions
// -------------------------------------------------------
else if( IsElement( "weighting")) {
out.mWeighting = ReadFloatFromTextContent();
TestClosing( "weighting");
}
else if( IsElement( "mix_with_previous_layer")) {
out.mMixWithPrevious = ReadFloatFromTextContent();
TestClosing( "mix_with_previous_layer");
}
// MAX3D extensions
// -------------------------------------------------------
else if( IsElement( "amount")) {
out.mWeighting = ReadFloatFromTextContent();
TestClosing( "amount");
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "technique") == 0)
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads an effect entry containing a color or a texture defining that color
void ColladaParser::ReadEffectColor( aiColor4D& pColor, Sampler& pSampler)
{
if (mReader->isEmptyElement())
return;
// Save current element name
const std::string curElem = mReader->getNodeName();
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if( IsElement( "color"))
{
// text content contains 4 floats
const char* content = GetTextContent();
content = fast_atoreal_move<ai_real>( content, (ai_real&)pColor.r);
SkipSpacesAndLineEnd( &content);
content = fast_atoreal_move<ai_real>( content, (ai_real&)pColor.g);
SkipSpacesAndLineEnd( &content);
content = fast_atoreal_move<ai_real>( content, (ai_real&)pColor.b);
SkipSpacesAndLineEnd( &content);
content = fast_atoreal_move<ai_real>( content, (ai_real&)pColor.a);
SkipSpacesAndLineEnd( &content);
TestClosing( "color");
}
else if( IsElement( "texture"))
{
// get name of source texture/sampler
int attrTex = GetAttribute( "texture");
pSampler.mName = mReader->getAttributeValue( attrTex);
// get name of UV source channel. Specification demands it to be there, but some exporters
// don't write it. It will be the default UV channel in case it's missing.
attrTex = TestAttribute( "texcoord");
if( attrTex >= 0 )
pSampler.mUVChannel = mReader->getAttributeValue( attrTex);
//SkipElement();
// as we've read texture, the color needs to be 1,1,1,1
pColor = aiColor4D(1.f, 1.f, 1.f, 1.f);
}
else if( IsElement( "technique"))
{
const int _profile = GetAttribute( "profile");
const char* profile = mReader->getAttributeValue( _profile );
// Some extensions are quite useful ... ReadSamplerProperties processes
// several extensions in MAYA, OKINO and MAX3D profiles.
if (!::strcmp(profile,"MAYA") || !::strcmp(profile,"MAX3D") || !::strcmp(profile,"OKINO"))
{
// get more information on this sampler
ReadSamplerProperties(pSampler);
}
else SkipElement();
}
else if( !IsElement( "extra"))
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END){
if (mReader->getNodeName() == curElem)
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads an effect entry containing a float
void ColladaParser::ReadEffectFloat( ai_real& pFloat)
{
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT){
if( IsElement( "float"))
{
// text content contains a single floats
const char* content = GetTextContent();
content = fast_atoreal_move<ai_real>( content, pFloat);
SkipSpacesAndLineEnd( &content);
TestClosing( "float");
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END){
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads an effect parameter specification of any kind
void ColladaParser::ReadEffectParam( Collada::EffectParam& pParam)
{
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if( IsElement( "surface"))
{
// image ID given inside <init_from> tags
TestOpening( "init_from");
const char* content = GetTextContent();
pParam.mType = Param_Surface;
pParam.mReference = content;
TestClosing( "init_from");
// don't care for remaining stuff
SkipElement( "surface");
}
else if( IsElement( "sampler2D") && (FV_1_4_n == mFormat || FV_1_3_n == mFormat))
{
// surface ID is given inside <source> tags
TestOpening( "source");
const char* content = GetTextContent();
pParam.mType = Param_Sampler;
pParam.mReference = content;
TestClosing( "source");
// don't care for remaining stuff
SkipElement( "sampler2D");
}
else if( IsElement( "sampler2D"))
{
// surface ID is given inside <instance_image> tags
TestOpening( "instance_image");
int attrURL = GetAttribute("url");
const char* url = mReader->getAttributeValue( attrURL);
if( url[0] != '#')
ThrowException( "Unsupported URL format in instance_image");
url++;
pParam.mType = Param_Sampler;
pParam.mReference = url;
SkipElement( "sampler2D");
} else
{
// ignore unknown element
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads the geometry library contents
void ColladaParser::ReadGeometryLibrary()
{
if( mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "geometry"))
{
// read ID. Another entry which is "optional" by design but obligatory in reality
int indexID = GetAttribute( "id");
std::string id = mReader->getAttributeValue( indexID);
// TODO: (thom) support SIDs
// ai_assert( TestAttribute( "sid") == -1);
// create a mesh and store it in the library under its ID
Mesh* mesh = new Mesh;
mMeshLibrary[id] = mesh;
// read the mesh name if it exists
const int nameIndex = TestAttribute("name");
if(nameIndex != -1)
{
mesh->mName = mReader->getAttributeValue(nameIndex);
}
// read on from there
ReadGeometry( mesh);
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "library_geometries") != 0)
ThrowException( "Expected end of <library_geometries> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads a geometry from the geometry library.
void ColladaParser::ReadGeometry( Collada::Mesh* pMesh)
{
if( mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "mesh"))
{
// read on from there
ReadMesh( pMesh);
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "geometry") != 0)
ThrowException( "Expected end of <geometry> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads a mesh from the geometry library
void ColladaParser::ReadMesh( Mesh* pMesh)
{
if( mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "source"))
{
// we have professionals dealing with this
ReadSource();
}
else if( IsElement( "vertices"))
{
// read per-vertex mesh data
ReadVertexData( pMesh);
}
else if( IsElement( "triangles") || IsElement( "lines") || IsElement( "linestrips")
|| IsElement( "polygons") || IsElement( "polylist") || IsElement( "trifans") || IsElement( "tristrips"))
{
// read per-index mesh data and faces setup
ReadIndexData( pMesh);
} else
{
// ignore the restf
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "technique_common") == 0)
{
// end of another meaningless element - read over it
}
else if( strcmp( mReader->getNodeName(), "mesh") == 0)
{
// end of <mesh> element - we're done here
break;
} else
{
// everything else should be punished
ThrowException( "Expected end of <mesh> element.");
}
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads a source element
void ColladaParser::ReadSource()
{
int indexID = GetAttribute( "id");
std::string sourceID = mReader->getAttributeValue( indexID);
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "float_array") || IsElement( "IDREF_array") || IsElement( "Name_array"))
{
ReadDataArray();
}
else if( IsElement( "technique_common"))
{
// I don't care for your profiles
}
else if( IsElement( "accessor"))
{
ReadAccessor( sourceID);
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "source") == 0)
{
// end of <source> - we're done
break;
}
else if( strcmp( mReader->getNodeName(), "technique_common") == 0)
{
// end of another meaningless element - read over it
} else
{
// everything else should be punished
ThrowException( "Expected end of <source> element.");
}
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads a data array holding a number of floats, and stores it in the global library
void ColladaParser::ReadDataArray()
{
std::string elmName = mReader->getNodeName();
bool isStringArray = (elmName == "IDREF_array" || elmName == "Name_array");
bool isEmptyElement = mReader->isEmptyElement();
// read attributes
int indexID = GetAttribute( "id");
std::string id = mReader->getAttributeValue( indexID);
int indexCount = GetAttribute( "count");
unsigned int count = (unsigned int) mReader->getAttributeValueAsInt( indexCount);
const char* content = TestTextContent();
// read values and store inside an array in the data library
mDataLibrary[id] = Data();
Data& data = mDataLibrary[id];
data.mIsStringArray = isStringArray;
// some exporters write empty data arrays, but we need to conserve them anyways because others might reference them
if (content)
{
if( isStringArray)
{
data.mStrings.reserve( count);
std::string s;
for( unsigned int a = 0; a < count; a++)
{
if( *content == 0)
ThrowException( "Expected more values while reading IDREF_array contents.");
s.clear();
while( !IsSpaceOrNewLine( *content))
s += *content++;
data.mStrings.push_back( s);
SkipSpacesAndLineEnd( &content);
}
} else
{
data.mValues.reserve( count);
for( unsigned int a = 0; a < count; a++)
{
if( *content == 0)
ThrowException( "Expected more values while reading float_array contents.");
ai_real value;
// read a number
content = fast_atoreal_move<ai_real>( content, value);
data.mValues.push_back( value);
// skip whitespace after it
SkipSpacesAndLineEnd( &content);
}
}
}
// test for closing tag
if( !isEmptyElement )
TestClosing( elmName.c_str());
}
// ------------------------------------------------------------------------------------------------
// Reads an accessor and stores it in the global library
void ColladaParser::ReadAccessor( const std::string& pID)
{
// read accessor attributes
int attrSource = GetAttribute( "source");
const char* source = mReader->getAttributeValue( attrSource);
if( source[0] != '#')
ThrowException( format() << "Unknown reference format in url \"" << source << "\" in source attribute of <accessor> element." );
int attrCount = GetAttribute( "count");
unsigned int count = (unsigned int) mReader->getAttributeValueAsInt( attrCount);
int attrOffset = TestAttribute( "offset");
unsigned int offset = 0;
if( attrOffset > -1)
offset = (unsigned int) mReader->getAttributeValueAsInt( attrOffset);
int attrStride = TestAttribute( "stride");
unsigned int stride = 1;
if( attrStride > -1)
stride = (unsigned int) mReader->getAttributeValueAsInt( attrStride);
// store in the library under the given ID
mAccessorLibrary[pID] = Accessor();
Accessor& acc = mAccessorLibrary[pID];
acc.mCount = count;
acc.mOffset = offset;
acc.mStride = stride;
acc.mSource = source+1; // ignore the leading '#'
acc.mSize = 0; // gets incremented with every param
// and read the components
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "param"))
{
// read data param
int attrName = TestAttribute( "name");
std::string name;
if( attrName > -1)
{
name = mReader->getAttributeValue( attrName);
// analyse for common type components and store it's sub-offset in the corresponding field
/* Cartesian coordinates */
if( name == "X") acc.mSubOffset[0] = acc.mParams.size();
else if( name == "Y") acc.mSubOffset[1] = acc.mParams.size();
else if( name == "Z") acc.mSubOffset[2] = acc.mParams.size();
/* RGBA colors */
else if( name == "R") acc.mSubOffset[0] = acc.mParams.size();
else if( name == "G") acc.mSubOffset[1] = acc.mParams.size();
else if( name == "B") acc.mSubOffset[2] = acc.mParams.size();
else if( name == "A") acc.mSubOffset[3] = acc.mParams.size();
/* UVWQ (STPQ) texture coordinates */
else if( name == "S") acc.mSubOffset[0] = acc.mParams.size();
else if( name == "T") acc.mSubOffset[1] = acc.mParams.size();
else if( name == "P") acc.mSubOffset[2] = acc.mParams.size();
// else if( name == "Q") acc.mSubOffset[3] = acc.mParams.size();
/* 4D uv coordinates are not supported in Assimp */
/* Generic extra data, interpreted as UV data, too*/
else if( name == "U") acc.mSubOffset[0] = acc.mParams.size();
else if( name == "V") acc.mSubOffset[1] = acc.mParams.size();
//else
// DefaultLogger::get()->warn( format() << "Unknown accessor parameter \"" << name << "\". Ignoring data channel." );
}
// read data type
int attrType = TestAttribute( "type");
if( attrType > -1)
{
// for the moment we only distinguish between a 4x4 matrix and anything else.
// TODO: (thom) I don't have a spec here at work. Check if there are other multi-value types
// which should be tested for here.
std::string type = mReader->getAttributeValue( attrType);
if( type == "float4x4")
acc.mSize += 16;
else
acc.mSize += 1;
}
acc.mParams.push_back( name);
// skip remaining stuff of this element, if any
SkipElement();
} else
{
ThrowException( format() << "Unexpected sub element <" << mReader->getNodeName() << "> in tag <accessor>" );
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "accessor") != 0)
ThrowException( "Expected end of <accessor> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads input declarations of per-vertex mesh data into the given mesh
void ColladaParser::ReadVertexData( Mesh* pMesh)
{
// extract the ID of the <vertices> element. Not that we care, but to catch strange referencing schemes we should warn about
int attrID= GetAttribute( "id");
pMesh->mVertexID = mReader->getAttributeValue( attrID);
// a number of <input> elements
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "input"))
{
ReadInputChannel( pMesh->mPerVertexData);
} else
{
ThrowException( format() << "Unexpected sub element <" << mReader->getNodeName() << "> in tag <vertices>" );
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "vertices") != 0)
ThrowException( "Expected end of <vertices> element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads input declarations of per-index mesh data into the given mesh
void ColladaParser::ReadIndexData( Mesh* pMesh)
{
std::vector<size_t> vcount;
std::vector<InputChannel> perIndexData;
// read primitive count from the attribute
int attrCount = GetAttribute( "count");
size_t numPrimitives = (size_t) mReader->getAttributeValueAsInt( attrCount);
// some mesh types (e.g. tristrips) don't specify primitive count upfront,
// so we need to sum up the actual number of primitives while we read the <p>-tags
size_t actualPrimitives = 0;
// material subgroup
int attrMaterial = TestAttribute( "material");
SubMesh subgroup;
if( attrMaterial > -1)
subgroup.mMaterial = mReader->getAttributeValue( attrMaterial);
// distinguish between polys and triangles
std::string elementName = mReader->getNodeName();
PrimitiveType primType = Prim_Invalid;
if( IsElement( "lines"))
primType = Prim_Lines;
else if( IsElement( "linestrips"))
primType = Prim_LineStrip;
else if( IsElement( "polygons"))
primType = Prim_Polygon;
else if( IsElement( "polylist"))
primType = Prim_Polylist;
else if( IsElement( "triangles"))
primType = Prim_Triangles;
else if( IsElement( "trifans"))
primType = Prim_TriFans;
else if( IsElement( "tristrips"))
primType = Prim_TriStrips;
ai_assert( primType != Prim_Invalid);
// also a number of <input> elements, but in addition a <p> primitive collection and probably index counts for all primitives
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "input"))
{
ReadInputChannel( perIndexData);
}
else if( IsElement( "vcount"))
{
if( !mReader->isEmptyElement())
{
if (numPrimitives) // It is possible to define a mesh without any primitives
{
// case <polylist> - specifies the number of indices for each polygon
const char* content = GetTextContent();
vcount.reserve( numPrimitives);
for( unsigned int a = 0; a < numPrimitives; a++)
{
if( *content == 0)
ThrowException( "Expected more values while reading <vcount> contents.");
// read a number
vcount.push_back( (size_t) strtoul10( content, &content));
// skip whitespace after it
SkipSpacesAndLineEnd( &content);
}
}
TestClosing( "vcount");
}
}
else if( IsElement( "p"))
{
if( !mReader->isEmptyElement())
{
// now here the actual fun starts - these are the indices to construct the mesh data from
actualPrimitives += ReadPrimitives(pMesh, perIndexData, numPrimitives, vcount, primType);
}
}
else if (IsElement("extra"))
{
SkipElement("extra");
} else if ( IsElement("ph")) {
SkipElement("ph");
} else {
ThrowException( format() << "Unexpected sub element <" << mReader->getNodeName() << "> in tag <" << elementName << ">" );
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( mReader->getNodeName() != elementName)
ThrowException( format() << "Expected end of <" << elementName << "> element." );
break;
}
}
#ifdef ASSIMP_BUILD_DEBUG
if (primType != Prim_TriFans && primType != Prim_TriStrips && primType != Prim_LineStrip &&
primType != Prim_Lines) { // this is ONLY to workaround a bug in SketchUp 15.3.331 where it writes the wrong 'count' when it writes out the 'lines'.
ai_assert(actualPrimitives == numPrimitives);
}
#endif
// only when we're done reading all <p> tags (and thus know the final vertex count) can we commit the submesh
subgroup.mNumFaces = actualPrimitives;
pMesh->mSubMeshes.push_back(subgroup);
}
// ------------------------------------------------------------------------------------------------
// Reads a single input channel element and stores it in the given array, if valid
void ColladaParser::ReadInputChannel( std::vector<InputChannel>& poChannels)
{
InputChannel channel;
// read semantic
int attrSemantic = GetAttribute( "semantic");
std::string semantic = mReader->getAttributeValue( attrSemantic);
channel.mType = GetTypeForSemantic( semantic);
// read source
int attrSource = GetAttribute( "source");
const char* source = mReader->getAttributeValue( attrSource);
if( source[0] != '#')
ThrowException( format() << "Unknown reference format in url \"" << source << "\" in source attribute of <input> element." );
channel.mAccessor = source+1; // skipping the leading #, hopefully the remaining text is the accessor ID only
// read index offset, if per-index <input>
int attrOffset = TestAttribute( "offset");
if( attrOffset > -1)
channel.mOffset = mReader->getAttributeValueAsInt( attrOffset);
// read set if texture coordinates
if(channel.mType == IT_Texcoord || channel.mType == IT_Color){
int attrSet = TestAttribute("set");
if(attrSet > -1){
attrSet = mReader->getAttributeValueAsInt( attrSet);
if(attrSet < 0)
ThrowException( format() << "Invalid index \"" << (attrSet) << "\" in set attribute of <input> element" );
channel.mIndex = attrSet;
}
}
// store, if valid type
if( channel.mType != IT_Invalid)
poChannels.push_back( channel);
// skip remaining stuff of this element, if any
SkipElement();
}
// ------------------------------------------------------------------------------------------------
// Reads a <p> primitive index list and assembles the mesh data into the given mesh
size_t ColladaParser::ReadPrimitives( Mesh* pMesh, std::vector<InputChannel>& pPerIndexChannels,
size_t pNumPrimitives, const std::vector<size_t>& pVCount, PrimitiveType pPrimType)
{
// determine number of indices coming per vertex
// find the offset index for all per-vertex channels
size_t numOffsets = 1;
size_t perVertexOffset = SIZE_MAX; // invalid value
for( const InputChannel& channel : pPerIndexChannels)
{
numOffsets = std::max( numOffsets, channel.mOffset+1);
if( channel.mType == IT_Vertex)
perVertexOffset = channel.mOffset;
}
// determine the expected number of indices
size_t expectedPointCount = 0;
switch( pPrimType)
{
case Prim_Polylist:
{
for( size_t i : pVCount)
expectedPointCount += i;
break;
}
case Prim_Lines:
expectedPointCount = 2 * pNumPrimitives;
break;
case Prim_Triangles:
expectedPointCount = 3 * pNumPrimitives;
break;
default:
// other primitive types don't state the index count upfront... we need to guess
break;
}
// and read all indices into a temporary array
std::vector<size_t> indices;
if( expectedPointCount > 0)
indices.reserve( expectedPointCount * numOffsets);
if (pNumPrimitives > 0) // It is possible to not contain any indices
{
const char* content = GetTextContent();
while( *content != 0)
{
// read a value.
// Hack: (thom) Some exporters put negative indices sometimes. We just try to carry on anyways.
int value = std::max( 0, strtol10( content, &content));
indices.push_back( size_t( value));
// skip whitespace after it
SkipSpacesAndLineEnd( &content);
}
}
// complain if the index count doesn't fit
if( expectedPointCount > 0 && indices.size() != expectedPointCount * numOffsets) {
if (pPrimType == Prim_Lines) {
// HACK: We just fix this number since SketchUp 15.3.331 writes the wrong 'count' for 'lines'
ReportWarning( "Expected different index count in <p> element, %d instead of %d.", indices.size(), expectedPointCount * numOffsets);
pNumPrimitives = (indices.size() / numOffsets) / 2;
} else
ThrowException( "Expected different index count in <p> element.");
} else if( expectedPointCount == 0 && (indices.size() % numOffsets) != 0)
ThrowException( "Expected different index count in <p> element.");
// find the data for all sources
for( std::vector<InputChannel>::iterator it = pMesh->mPerVertexData.begin(); it != pMesh->mPerVertexData.end(); ++it)
{
InputChannel& input = *it;
if( input.mResolved)
continue;
// find accessor
input.mResolved = &ResolveLibraryReference( mAccessorLibrary, input.mAccessor);
// resolve accessor's data pointer as well, if necessary
const Accessor* acc = input.mResolved;
if( !acc->mData)
acc->mData = &ResolveLibraryReference( mDataLibrary, acc->mSource);
}
// and the same for the per-index channels
for( std::vector<InputChannel>::iterator it = pPerIndexChannels.begin(); it != pPerIndexChannels.end(); ++it)
{
InputChannel& input = *it;
if( input.mResolved)
continue;
// ignore vertex pointer, it doesn't refer to an accessor
if( input.mType == IT_Vertex)
{
// warn if the vertex channel does not refer to the <vertices> element in the same mesh
if( input.mAccessor != pMesh->mVertexID)
ThrowException( "Unsupported vertex referencing scheme.");
continue;
}
// find accessor
input.mResolved = &ResolveLibraryReference( mAccessorLibrary, input.mAccessor);
// resolve accessor's data pointer as well, if necessary
const Accessor* acc = input.mResolved;
if( !acc->mData)
acc->mData = &ResolveLibraryReference( mDataLibrary, acc->mSource);
}
// For continued primitives, the given count does not come all in one <p>, but only one primitive per <p>
size_t numPrimitives = pNumPrimitives;
if( pPrimType == Prim_TriFans || pPrimType == Prim_Polygon)
numPrimitives = 1;
// For continued primitives, the given count is actually the number of <p>'s inside the parent tag
if ( pPrimType == Prim_TriStrips){
size_t numberOfVertices = indices.size() / numOffsets;
numPrimitives = numberOfVertices - 2;
}
if (pPrimType == Prim_LineStrip) {
size_t numberOfVertices = indices.size() / numOffsets;
numPrimitives = numberOfVertices - 1;
}
pMesh->mFaceSize.reserve( numPrimitives);
pMesh->mFacePosIndices.reserve( indices.size() / numOffsets);
size_t polylistStartVertex = 0;
for (size_t currentPrimitive = 0; currentPrimitive < numPrimitives; currentPrimitive++)
{
// determine number of points for this primitive
size_t numPoints = 0;
switch( pPrimType)
{
case Prim_Lines:
numPoints = 2;
for (size_t currentVertex = 0; currentVertex < numPoints; currentVertex++)
CopyVertex(currentVertex, numOffsets, numPoints, perVertexOffset, pMesh, pPerIndexChannels, currentPrimitive, indices);
break;
case Prim_LineStrip:
numPoints = 2;
for (size_t currentVertex = 0; currentVertex < numPoints; currentVertex++)
CopyVertex(currentVertex, numOffsets, 1, perVertexOffset, pMesh, pPerIndexChannels, currentPrimitive, indices);
break;
case Prim_Triangles:
numPoints = 3;
for (size_t currentVertex = 0; currentVertex < numPoints; currentVertex++)
CopyVertex(currentVertex, numOffsets, numPoints, perVertexOffset, pMesh, pPerIndexChannels, currentPrimitive, indices);
break;
case Prim_TriStrips:
numPoints = 3;
ReadPrimTriStrips(numOffsets, perVertexOffset, pMesh, pPerIndexChannels, currentPrimitive, indices);
break;
case Prim_Polylist:
numPoints = pVCount[currentPrimitive];
for (size_t currentVertex = 0; currentVertex < numPoints; currentVertex++)
CopyVertex(polylistStartVertex + currentVertex, numOffsets, 1, perVertexOffset, pMesh, pPerIndexChannels, 0, indices);
polylistStartVertex += numPoints;
break;
case Prim_TriFans:
case Prim_Polygon:
numPoints = indices.size() / numOffsets;
for (size_t currentVertex = 0; currentVertex < numPoints; currentVertex++)
CopyVertex(currentVertex, numOffsets, numPoints, perVertexOffset, pMesh, pPerIndexChannels, currentPrimitive, indices);
break;
default:
// LineStrip is not supported due to expected index unmangling
ThrowException( "Unsupported primitive type.");
break;
}
// store the face size to later reconstruct the face from
pMesh->mFaceSize.push_back( numPoints);
}
// if I ever get my hands on that guy who invented this steaming pile of indirection...
TestClosing( "p");
return numPrimitives;
}
///@note This function willn't work correctly if both PerIndex and PerVertex channels have same channels.
///For example if TEXCOORD present in both <vertices> and <polylist> tags this function will create wrong uv coordinates.
///It's not clear from COLLADA documentation is this allowed or not. For now only exporter fixed to avoid such behavior
void ColladaParser::CopyVertex(size_t currentVertex, size_t numOffsets, size_t numPoints, size_t perVertexOffset, Mesh* pMesh, std::vector<InputChannel>& pPerIndexChannels, size_t currentPrimitive, const std::vector<size_t>& indices){
// calculate the base offset of the vertex whose attributes we ant to copy
size_t baseOffset = currentPrimitive * numOffsets * numPoints + currentVertex * numOffsets;
// don't overrun the boundaries of the index list
ai_assert((baseOffset + numOffsets - 1) < indices.size());
// extract per-vertex channels using the global per-vertex offset
for (std::vector<InputChannel>::iterator it = pMesh->mPerVertexData.begin(); it != pMesh->mPerVertexData.end(); ++it)
ExtractDataObjectFromChannel(*it, indices[baseOffset + perVertexOffset], pMesh);
// and extract per-index channels using there specified offset
for (std::vector<InputChannel>::iterator it = pPerIndexChannels.begin(); it != pPerIndexChannels.end(); ++it)
ExtractDataObjectFromChannel(*it, indices[baseOffset + it->mOffset], pMesh);
// store the vertex-data index for later assignment of bone vertex weights
pMesh->mFacePosIndices.push_back(indices[baseOffset + perVertexOffset]);
}
void ColladaParser::ReadPrimTriStrips(size_t numOffsets, size_t perVertexOffset, Mesh* pMesh, std::vector<InputChannel>& pPerIndexChannels, size_t currentPrimitive, const std::vector<size_t>& indices){
if (currentPrimitive % 2 != 0){
//odd tristrip triangles need their indices mangled, to preserve winding direction
CopyVertex(1, numOffsets, 1, perVertexOffset, pMesh, pPerIndexChannels, currentPrimitive, indices);
CopyVertex(0, numOffsets, 1, perVertexOffset, pMesh, pPerIndexChannels, currentPrimitive, indices);
CopyVertex(2, numOffsets, 1, perVertexOffset, pMesh, pPerIndexChannels, currentPrimitive, indices);
}
else {//for non tristrips or even tristrip triangles
CopyVertex(0, numOffsets, 1, perVertexOffset, pMesh, pPerIndexChannels, currentPrimitive, indices);
CopyVertex(1, numOffsets, 1, perVertexOffset, pMesh, pPerIndexChannels, currentPrimitive, indices);
CopyVertex(2, numOffsets, 1, perVertexOffset, pMesh, pPerIndexChannels, currentPrimitive, indices);
}
}
// ------------------------------------------------------------------------------------------------
// Extracts a single object from an input channel and stores it in the appropriate mesh data array
void ColladaParser::ExtractDataObjectFromChannel( const InputChannel& pInput, size_t pLocalIndex, Mesh* pMesh)
{
// ignore vertex referrer - we handle them that separate
if( pInput.mType == IT_Vertex)
return;
const Accessor& acc = *pInput.mResolved;
if( pLocalIndex >= acc.mCount)
ThrowException( format() << "Invalid data index (" << pLocalIndex << "/" << acc.mCount << ") in primitive specification" );
// get a pointer to the start of the data object referred to by the accessor and the local index
const ai_real* dataObject = &(acc.mData->mValues[0]) + acc.mOffset + pLocalIndex* acc.mStride;
// assemble according to the accessors component sub-offset list. We don't care, yet,
// what kind of object exactly we're extracting here
ai_real obj[4];
for( size_t c = 0; c < 4; ++c)
obj[c] = dataObject[acc.mSubOffset[c]];
// now we reinterpret it according to the type we're reading here
switch( pInput.mType)
{
case IT_Position: // ignore all position streams except 0 - there can be only one position
if( pInput.mIndex == 0)
pMesh->mPositions.push_back( aiVector3D( obj[0], obj[1], obj[2]));
else
DefaultLogger::get()->error("Collada: just one vertex position stream supported");
break;
case IT_Normal:
// pad to current vertex count if necessary
if( pMesh->mNormals.size() < pMesh->mPositions.size()-1)
pMesh->mNormals.insert( pMesh->mNormals.end(), pMesh->mPositions.size() - pMesh->mNormals.size() - 1, aiVector3D( 0, 1, 0));
// ignore all normal streams except 0 - there can be only one normal
if( pInput.mIndex == 0)
pMesh->mNormals.push_back( aiVector3D( obj[0], obj[1], obj[2]));
else
DefaultLogger::get()->error("Collada: just one vertex normal stream supported");
break;
case IT_Tangent:
// pad to current vertex count if necessary
if( pMesh->mTangents.size() < pMesh->mPositions.size()-1)
pMesh->mTangents.insert( pMesh->mTangents.end(), pMesh->mPositions.size() - pMesh->mTangents.size() - 1, aiVector3D( 1, 0, 0));
// ignore all tangent streams except 0 - there can be only one tangent
if( pInput.mIndex == 0)
pMesh->mTangents.push_back( aiVector3D( obj[0], obj[1], obj[2]));
else
DefaultLogger::get()->error("Collada: just one vertex tangent stream supported");
break;
case IT_Bitangent:
// pad to current vertex count if necessary
if( pMesh->mBitangents.size() < pMesh->mPositions.size()-1)
pMesh->mBitangents.insert( pMesh->mBitangents.end(), pMesh->mPositions.size() - pMesh->mBitangents.size() - 1, aiVector3D( 0, 0, 1));
// ignore all bitangent streams except 0 - there can be only one bitangent
if( pInput.mIndex == 0)
pMesh->mBitangents.push_back( aiVector3D( obj[0], obj[1], obj[2]));
else
DefaultLogger::get()->error("Collada: just one vertex bitangent stream supported");
break;
case IT_Texcoord:
// up to 4 texture coord sets are fine, ignore the others
if( pInput.mIndex < AI_MAX_NUMBER_OF_TEXTURECOORDS)
{
// pad to current vertex count if necessary
if( pMesh->mTexCoords[pInput.mIndex].size() < pMesh->mPositions.size()-1)
pMesh->mTexCoords[pInput.mIndex].insert( pMesh->mTexCoords[pInput.mIndex].end(),
pMesh->mPositions.size() - pMesh->mTexCoords[pInput.mIndex].size() - 1, aiVector3D( 0, 0, 0));
pMesh->mTexCoords[pInput.mIndex].push_back( aiVector3D( obj[0], obj[1], obj[2]));
if (0 != acc.mSubOffset[2] || 0 != acc.mSubOffset[3]) /* hack ... consider cleaner solution */
pMesh->mNumUVComponents[pInput.mIndex]=3;
} else
{
DefaultLogger::get()->error("Collada: too many texture coordinate sets. Skipping.");
}
break;
case IT_Color:
// up to 4 color sets are fine, ignore the others
if( pInput.mIndex < AI_MAX_NUMBER_OF_COLOR_SETS)
{
// pad to current vertex count if necessary
if( pMesh->mColors[pInput.mIndex].size() < pMesh->mPositions.size()-1)
pMesh->mColors[pInput.mIndex].insert( pMesh->mColors[pInput.mIndex].end(),
pMesh->mPositions.size() - pMesh->mColors[pInput.mIndex].size() - 1, aiColor4D( 0, 0, 0, 1));
aiColor4D result(0, 0, 0, 1);
for (size_t i = 0; i < pInput.mResolved->mSize; ++i)
{
result[static_cast<unsigned int>(i)] = obj[pInput.mResolved->mSubOffset[i]];
}
pMesh->mColors[pInput.mIndex].push_back(result);
} else
{
DefaultLogger::get()->error("Collada: too many vertex color sets. Skipping.");
}
break;
default:
// IT_Invalid and IT_Vertex
ai_assert(false && "shouldn't ever get here");
}
}
// ------------------------------------------------------------------------------------------------
// Reads the library of node hierarchies and scene parts
void ColladaParser::ReadSceneLibrary()
{
if( mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
// a visual scene - generate root node under its ID and let ReadNode() do the recursive work
if( IsElement( "visual_scene"))
{
// read ID. Is optional according to the spec, but how on earth should a scene_instance refer to it then?
int indexID = GetAttribute( "id");
const char* attrID = mReader->getAttributeValue( indexID);
// read name if given.
int indexName = TestAttribute( "name");
const char* attrName = "unnamed";
if( indexName > -1)
attrName = mReader->getAttributeValue( indexName);
// create a node and store it in the library under its ID
Node* node = new Node;
node->mID = attrID;
node->mName = attrName;
mNodeLibrary[node->mID] = node;
ReadSceneNode( node);
} else
{
// ignore the rest
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "library_visual_scenes") == 0)
//ThrowException( "Expected end of \"library_visual_scenes\" element.");
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads a scene node's contents including children and stores it in the given node
void ColladaParser::ReadSceneNode( Node* pNode)
{
// quit immediately on <bla/> elements
if( mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "node"))
{
Node* child = new Node;
int attrID = TestAttribute( "id");
if( attrID > -1)
child->mID = mReader->getAttributeValue( attrID);
int attrSID = TestAttribute( "sid");
if( attrSID > -1)
child->mSID = mReader->getAttributeValue( attrSID);
int attrName = TestAttribute( "name");
if( attrName > -1)
child->mName = mReader->getAttributeValue( attrName);
// TODO: (thom) support SIDs
// ai_assert( TestAttribute( "sid") == -1);
if (pNode)
{
pNode->mChildren.push_back( child);
child->mParent = pNode;
}
else
{
// no parent node given, probably called from <library_nodes> element.
// create new node in node library
mNodeLibrary[child->mID] = child;
}
// read on recursively from there
ReadSceneNode( child);
continue;
}
// For any further stuff we need a valid node to work on
else if (!pNode)
continue;
if( IsElement( "lookat"))
ReadNodeTransformation( pNode, TF_LOOKAT);
else if( IsElement( "matrix"))
ReadNodeTransformation( pNode, TF_MATRIX);
else if( IsElement( "rotate"))
ReadNodeTransformation( pNode, TF_ROTATE);
else if( IsElement( "scale"))
ReadNodeTransformation( pNode, TF_SCALE);
else if( IsElement( "skew"))
ReadNodeTransformation( pNode, TF_SKEW);
else if( IsElement( "translate"))
ReadNodeTransformation( pNode, TF_TRANSLATE);
else if( IsElement( "render") && pNode->mParent == NULL && 0 == pNode->mPrimaryCamera.length())
{
// ... scene evaluation or, in other words, postprocessing pipeline,
// or, again in other words, a turing-complete description how to
// render a Collada scene. The only thing that is interesting for
// us is the primary camera.
int attrId = TestAttribute("camera_node");
if (-1 != attrId)
{
const char* s = mReader->getAttributeValue(attrId);
if (s[0] != '#')
DefaultLogger::get()->error("Collada: Unresolved reference format of camera");
else
pNode->mPrimaryCamera = s+1;
}
}
else if( IsElement( "instance_node"))
{
// find the node in the library
int attrID = TestAttribute( "url");
if( attrID != -1)
{
const char* s = mReader->getAttributeValue(attrID);
if (s[0] != '#')
DefaultLogger::get()->error("Collada: Unresolved reference format of node");
else
{
pNode->mNodeInstances.push_back(NodeInstance());
pNode->mNodeInstances.back().mNode = s+1;
}
}
}
else if( IsElement( "instance_geometry") || IsElement( "instance_controller"))
{
// Reference to a mesh or controller, with possible material associations
ReadNodeGeometry( pNode);
}
else if( IsElement( "instance_light"))
{
// Reference to a light, name given in 'url' attribute
int attrID = TestAttribute("url");
if (-1 == attrID)
DefaultLogger::get()->warn("Collada: Expected url attribute in <instance_light> element");
else
{
const char* url = mReader->getAttributeValue( attrID);
if( url[0] != '#')
ThrowException( "Unknown reference format in <instance_light> element");
pNode->mLights.push_back(LightInstance());
pNode->mLights.back().mLight = url+1;
}
}
else if( IsElement( "instance_camera"))
{
// Reference to a camera, name given in 'url' attribute
int attrID = TestAttribute("url");
if (-1 == attrID)
DefaultLogger::get()->warn("Collada: Expected url attribute in <instance_camera> element");
else
{
const char* url = mReader->getAttributeValue( attrID);
if( url[0] != '#')
ThrowException( "Unknown reference format in <instance_camera> element");
pNode->mCameras.push_back(CameraInstance());
pNode->mCameras.back().mCamera = url+1;
}
}
else
{
// skip everything else for the moment
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads a node transformation entry of the given type and adds it to the given node's transformation list.
void ColladaParser::ReadNodeTransformation( Node* pNode, TransformType pType)
{
if( mReader->isEmptyElement())
return;
std::string tagName = mReader->getNodeName();
Transform tf;
tf.mType = pType;
// read SID
int indexSID = TestAttribute( "sid");
if( indexSID >= 0)
tf.mID = mReader->getAttributeValue( indexSID);
// how many parameters to read per transformation type
static const unsigned int sNumParameters[] = { 9, 4, 3, 3, 7, 16 };
const char* content = GetTextContent();
// read as many parameters and store in the transformation
for( unsigned int a = 0; a < sNumParameters[pType]; a++)
{
// read a number
content = fast_atoreal_move<ai_real>( content, tf.f[a]);
// skip whitespace after it
SkipSpacesAndLineEnd( &content);
}
// place the transformation at the queue of the node
pNode->mTransforms.push_back( tf);
// and consume the closing tag
TestClosing( tagName.c_str());
}
// ------------------------------------------------------------------------------------------------
// Processes bind_vertex_input and bind elements
void ColladaParser::ReadMaterialVertexInputBinding( Collada::SemanticMappingTable& tbl)
{
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if( IsElement( "bind_vertex_input"))
{
Collada::InputSemanticMapEntry vn;
// effect semantic
int n = GetAttribute("semantic");
std::string s = mReader->getAttributeValue(n);
// input semantic
n = GetAttribute("input_semantic");
vn.mType = GetTypeForSemantic( mReader->getAttributeValue(n) );
// index of input set
n = TestAttribute("input_set");
if (-1 != n)
vn.mSet = mReader->getAttributeValueAsInt(n);
tbl.mMap[s] = vn;
}
else if( IsElement( "bind")) {
DefaultLogger::get()->warn("Collada: Found unsupported <bind> element");
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
if( strcmp( mReader->getNodeName(), "instance_material") == 0)
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Reads a mesh reference in a node and adds it to the node's mesh list
void ColladaParser::ReadNodeGeometry( Node* pNode)
{
// referred mesh is given as an attribute of the <instance_geometry> element
int attrUrl = GetAttribute( "url");
const char* url = mReader->getAttributeValue( attrUrl);
if( url[0] != '#')
ThrowException( "Unknown reference format");
Collada::MeshInstance instance;
instance.mMeshOrController = url+1; // skipping the leading #
if( !mReader->isEmptyElement())
{
// read material associations. Ignore additional elements in between
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT)
{
if( IsElement( "instance_material"))
{
// read ID of the geometry subgroup and the target material
int attrGroup = GetAttribute( "symbol");
std::string group = mReader->getAttributeValue( attrGroup);
int attrMaterial = GetAttribute( "target");
const char* urlMat = mReader->getAttributeValue( attrMaterial);
Collada::SemanticMappingTable s;
if( urlMat[0] == '#')
urlMat++;
s.mMatName = urlMat;
// resolve further material details + THIS UGLY AND NASTY semantic mapping stuff
if( !mReader->isEmptyElement())
ReadMaterialVertexInputBinding(s);
// store the association
instance.mMaterials[group] = s;
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
{
if( strcmp( mReader->getNodeName(), "instance_geometry") == 0
|| strcmp( mReader->getNodeName(), "instance_controller") == 0)
break;
}
}
}
// store it
pNode->mMeshes.push_back( instance);
}
// ------------------------------------------------------------------------------------------------
// Reads the collada scene
void ColladaParser::ReadScene()
{
if( mReader->isEmptyElement())
return;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT) {
if( IsElement( "instance_visual_scene"))
{
// should be the first and only occurrence
if( mRootNode)
ThrowException( "Invalid scene containing multiple root nodes in <instance_visual_scene> element");
// read the url of the scene to instance. Should be of format "#some_name"
int urlIndex = GetAttribute( "url");
const char* url = mReader->getAttributeValue( urlIndex);
if( url[0] != '#')
ThrowException( "Unknown reference format in <instance_visual_scene> element");
// find the referred scene, skip the leading #
NodeLibrary::const_iterator sit = mNodeLibrary.find( url+1);
if( sit == mNodeLibrary.end())
ThrowException( "Unable to resolve visual_scene reference \"" + std::string(url) + "\" in <instance_visual_scene> element.");
mRootNode = sit->second;
} else {
SkipElement();
}
}
else if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END){
break;
}
}
}
// ------------------------------------------------------------------------------------------------
// Aborts the file reading with an exception
AI_WONT_RETURN void ColladaParser::ThrowException( const std::string& pError) const
{
throw DeadlyImportError( format() << "Collada: " << mFileName << " - " << pError );
}
void ColladaParser::ReportWarning(const char* msg,...)
{
ai_assert(NULL != msg);
va_list args;
va_start(args,msg);
char szBuffer[3000];
const int iLen = vsprintf(szBuffer,msg,args);
ai_assert(iLen > 0);
va_end(args);
DefaultLogger::get()->warn("Validation warning: " + std::string(szBuffer,iLen));
}
// ------------------------------------------------------------------------------------------------
// Skips all data until the end node of the current element
void ColladaParser::SkipElement()
{
// nothing to skip if it's an <element />
if( mReader->isEmptyElement())
return;
// reroute
SkipElement( mReader->getNodeName());
}
// ------------------------------------------------------------------------------------------------
// Skips all data until the end node of the given element
void ColladaParser::SkipElement( const char* pElement)
{
// copy the current node's name because it'a pointer to the reader's internal buffer,
// which is going to change with the upcoming parsing
std::string element = pElement;
while( mReader->read())
{
if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
if( mReader->getNodeName() == element)
break;
}
}
// ------------------------------------------------------------------------------------------------
// Tests for an opening element of the given name, throws an exception if not found
void ColladaParser::TestOpening( const char* pName)
{
// read element start
if( !mReader->read())
ThrowException( format() << "Unexpected end of file while beginning of <" << pName << "> element." );
// whitespace in front is ok, just read again if found
if( mReader->getNodeType() == irr::io::EXN_TEXT)
if( !mReader->read())
ThrowException( format() << "Unexpected end of file while reading beginning of <" << pName << "> element." );
if( mReader->getNodeType() != irr::io::EXN_ELEMENT || strcmp( mReader->getNodeName(), pName) != 0)
ThrowException( format() << "Expected start of <" << pName << "> element." );
}
// ------------------------------------------------------------------------------------------------
// Tests for the closing tag of the given element, throws an exception if not found
void ColladaParser::TestClosing( const char* pName)
{
// check if we're already on the closing tag and return right away
if( mReader->getNodeType() == irr::io::EXN_ELEMENT_END && strcmp( mReader->getNodeName(), pName) == 0)
return;
// if not, read some more
if( !mReader->read())
ThrowException( format() << "Unexpected end of file while reading end of <" << pName << "> element." );
// whitespace in front is ok, just read again if found
if( mReader->getNodeType() == irr::io::EXN_TEXT)
if( !mReader->read())
ThrowException( format() << "Unexpected end of file while reading end of <" << pName << "> element." );
// but this has the be the closing tag, or we're lost
if( mReader->getNodeType() != irr::io::EXN_ELEMENT_END || strcmp( mReader->getNodeName(), pName) != 0)
ThrowException( format() << "Expected end of <" << pName << "> element." );
}
// ------------------------------------------------------------------------------------------------
// Returns the index of the named attribute or -1 if not found. Does not throw, therefore useful for optional attributes
int ColladaParser::GetAttribute( const char* pAttr) const
{
int index = TestAttribute( pAttr);
if( index != -1)
return index;
// attribute not found -> throw an exception
ThrowException( format() << "Expected attribute \"" << pAttr << "\" for element <" << mReader->getNodeName() << ">." );
return -1;
}
// ------------------------------------------------------------------------------------------------
// Tests the present element for the presence of one attribute, returns its index or throws an exception if not found
int ColladaParser::TestAttribute( const char* pAttr) const
{
for( int a = 0; a < mReader->getAttributeCount(); a++)
if( strcmp( mReader->getAttributeName( a), pAttr) == 0)
return a;
return -1;
}
// ------------------------------------------------------------------------------------------------
// Reads the text contents of an element, throws an exception if not given. Skips leading whitespace.
const char* ColladaParser::GetTextContent()
{
const char* sz = TestTextContent();
if(!sz) {
ThrowException( "Invalid contents in element \"n\".");
}
return sz;
}
// ------------------------------------------------------------------------------------------------
// Reads the text contents of an element, returns NULL if not given. Skips leading whitespace.
const char* ColladaParser::TestTextContent()
{
// present node should be the beginning of an element
if( mReader->getNodeType() != irr::io::EXN_ELEMENT || mReader->isEmptyElement())
return NULL;
// read contents of the element
if( !mReader->read() )
return NULL;
if( mReader->getNodeType() != irr::io::EXN_TEXT)
return NULL;
// skip leading whitespace
const char* text = mReader->getNodeData();
SkipSpacesAndLineEnd( &text);
return text;
}
// ------------------------------------------------------------------------------------------------
// Calculates the resulting transformation fromm all the given transform steps
aiMatrix4x4 ColladaParser::CalculateResultTransform( const std::vector<Transform>& pTransforms) const
{
aiMatrix4x4 res;
for( std::vector<Transform>::const_iterator it = pTransforms.begin(); it != pTransforms.end(); ++it)
{
const Transform& tf = *it;
switch( tf.mType)
{
case TF_LOOKAT:
{
aiVector3D pos( tf.f[0], tf.f[1], tf.f[2]);
aiVector3D dstPos( tf.f[3], tf.f[4], tf.f[5]);
aiVector3D up = aiVector3D( tf.f[6], tf.f[7], tf.f[8]).Normalize();
aiVector3D dir = aiVector3D( dstPos - pos).Normalize();
aiVector3D right = (dir ^ up).Normalize();
res *= aiMatrix4x4(
right.x, up.x, -dir.x, pos.x,
right.y, up.y, -dir.y, pos.y,
right.z, up.z, -dir.z, pos.z,
0, 0, 0, 1);
break;
}
case TF_ROTATE:
{
aiMatrix4x4 rot;
ai_real angle = tf.f[3] * ai_real( AI_MATH_PI) / ai_real( 180.0 );
aiVector3D axis( tf.f[0], tf.f[1], tf.f[2]);
aiMatrix4x4::Rotation( angle, axis, rot);
res *= rot;
break;
}
case TF_TRANSLATE:
{
aiMatrix4x4 trans;
aiMatrix4x4::Translation( aiVector3D( tf.f[0], tf.f[1], tf.f[2]), trans);
res *= trans;
break;
}
case TF_SCALE:
{
aiMatrix4x4 scale( tf.f[0], 0.0f, 0.0f, 0.0f, 0.0f, tf.f[1], 0.0f, 0.0f, 0.0f, 0.0f, tf.f[2], 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
res *= scale;
break;
}
case TF_SKEW:
// TODO: (thom)
ai_assert( false);
break;
case TF_MATRIX:
{
aiMatrix4x4 mat( tf.f[0], tf.f[1], tf.f[2], tf.f[3], tf.f[4], tf.f[5], tf.f[6], tf.f[7],
tf.f[8], tf.f[9], tf.f[10], tf.f[11], tf.f[12], tf.f[13], tf.f[14], tf.f[15]);
res *= mat;
break;
}
default:
ai_assert( false);
break;
}
}
return res;
}
// ------------------------------------------------------------------------------------------------
// Determines the input data type for the given semantic string
Collada::InputType ColladaParser::GetTypeForSemantic( const std::string& semantic)
{
if ( semantic.empty() ) {
DefaultLogger::get()->warn( format() << "Vertex input type is empty." );
return IT_Invalid;
}
if( semantic == "POSITION")
return IT_Position;
else if( semantic == "TEXCOORD")
return IT_Texcoord;
else if( semantic == "NORMAL")
return IT_Normal;
else if( semantic == "COLOR")
return IT_Color;
else if( semantic == "VERTEX")
return IT_Vertex;
else if( semantic == "BINORMAL" || semantic == "TEXBINORMAL")
return IT_Bitangent;
else if( semantic == "TANGENT" || semantic == "TEXTANGENT")
return IT_Tangent;
DefaultLogger::get()->warn( format() << "Unknown vertex input type \"" << semantic << "\". Ignoring." );
return IT_Invalid;
}
#endif // !! ASSIMP_BUILD_NO_DAE_IMPORTER