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/*
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Open Asset Import Library (assimp)
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*/
/** @file B3DImporter.cpp
* @brief Implementation of the b3d importer class
*/
#ifndef ASSIMP_BUILD_NO_B3D_IMPORTER
// internal headers
#include "B3DImporter.h"
#include "TextureTransform.h"
#include "ConvertToLHProcess.h"
#include "StringUtils.h"
#include <memory>
#include <assimp/IOSystem.hpp>
#include <assimp/anim.h>
#include <assimp/scene.h>
#include <assimp/DefaultLogger.hpp>
#include <assimp/importerdesc.h>
using namespace Assimp;
using namespace std;
static const aiImporterDesc desc = {
"BlitzBasic 3D Importer",
"",
"",
"http://www.blitzbasic.com/",
aiImporterFlags_SupportBinaryFlavour,
0,
0,
0,
0,
"b3d"
};
// (fixme, Aramis) quick workaround to get rid of all those signed to unsigned warnings
#ifdef _MSC_VER
# pragma warning (disable: 4018)
#endif
//#define DEBUG_B3D
template<typename T>
void DeleteAllBarePointers(std::vector<T>& x)
{
for(auto p : x)
{
delete p;
}
}
B3DImporter::~B3DImporter()
{
DeleteAllBarePointers(_animations);
}
// ------------------------------------------------------------------------------------------------
bool B3DImporter::CanRead( const std::string& pFile, IOSystem* /*pIOHandler*/, bool /*checkSig*/) const{
size_t pos=pFile.find_last_of( '.' );
if( pos==string::npos ) return false;
string ext=pFile.substr( pos+1 );
if( ext.size()!=3 ) return false;
return (ext[0]=='b' || ext[0]=='B') && (ext[1]=='3') && (ext[2]=='d' || ext[2]=='D');
}
// ------------------------------------------------------------------------------------------------
// Loader meta information
const aiImporterDesc* B3DImporter::GetInfo () const
{
return &desc;
}
#ifdef DEBUG_B3D
extern "C"{ void _stdcall AllocConsole(); }
#endif
// ------------------------------------------------------------------------------------------------
void B3DImporter::InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler){
#ifdef DEBUG_B3D
AllocConsole();
freopen( "conin$","r",stdin );
freopen( "conout$","w",stdout );
freopen( "conout$","w",stderr );
cout<<"Hello world from the B3DImporter!"<<endl;
#endif
std::unique_ptr<IOStream> file( pIOHandler->Open( pFile));
// Check whether we can read from the file
if( file.get() == NULL)
throw DeadlyImportError( "Failed to open B3D file " + pFile + ".");
// check whether the .b3d file is large enough to contain
// at least one chunk.
size_t fileSize = file->FileSize();
if( fileSize<8 ) throw DeadlyImportError( "B3D File is too small.");
_pos=0;
_buf.resize( fileSize );
file->Read( &_buf[0],1,fileSize );
_stack.clear();
ReadBB3D( pScene );
}
// ------------------------------------------------------------------------------------------------
AI_WONT_RETURN void B3DImporter::Oops(){
throw DeadlyImportError( "B3D Importer - INTERNAL ERROR" );
}
// ------------------------------------------------------------------------------------------------
AI_WONT_RETURN void B3DImporter::Fail( string str ){
#ifdef DEBUG_B3D
cout<<"Error in B3D file data: "<<str<<endl;
#endif
throw DeadlyImportError( "B3D Importer - error in B3D file data: "+str );
}
// ------------------------------------------------------------------------------------------------
int B3DImporter::ReadByte(){
if( _pos<_buf.size() ) return _buf[_pos++];
Fail( "EOF" );
return 0;
}
// ------------------------------------------------------------------------------------------------
int B3DImporter::ReadInt(){
if( _pos+4<=_buf.size() ){
int n;
memcpy(&n, &_buf[_pos], 4);
_pos+=4;
return n;
}
Fail( "EOF" );
return 0;
}
// ------------------------------------------------------------------------------------------------
float B3DImporter::ReadFloat(){
if( _pos+4<=_buf.size() ){
float n;
memcpy(&n, &_buf[_pos], 4);
_pos+=4;
return n;
}
Fail( "EOF" );
return 0.0f;
}
// ------------------------------------------------------------------------------------------------
aiVector2D B3DImporter::ReadVec2(){
float x=ReadFloat();
float y=ReadFloat();
return aiVector2D( x,y );
}
// ------------------------------------------------------------------------------------------------
aiVector3D B3DImporter::ReadVec3(){
float x=ReadFloat();
float y=ReadFloat();
float z=ReadFloat();
return aiVector3D( x,y,z );
}
// ------------------------------------------------------------------------------------------------
aiQuaternion B3DImporter::ReadQuat(){
// (aramis_acg) Fix to adapt the loader to changed quat orientation
float w=-ReadFloat();
float x=ReadFloat();
float y=ReadFloat();
float z=ReadFloat();
return aiQuaternion( w,x,y,z );
}
// ------------------------------------------------------------------------------------------------
string B3DImporter::ReadString(){
string str;
while( _pos<_buf.size() ){
char c=(char)ReadByte();
if( !c ) return str;
str+=c;
}
Fail( "EOF" );
return string();
}
// ------------------------------------------------------------------------------------------------
string B3DImporter::ReadChunk(){
string tag;
for( int i=0;i<4;++i ){
tag+=char( ReadByte() );
}
#ifdef DEBUG_B3D
// cout<<"ReadChunk:"<<tag<<endl;
#endif
unsigned sz=(unsigned)ReadInt();
_stack.push_back( _pos+sz );
return tag;
}
// ------------------------------------------------------------------------------------------------
void B3DImporter::ExitChunk(){
_pos=_stack.back();
_stack.pop_back();
}
// ------------------------------------------------------------------------------------------------
unsigned B3DImporter::ChunkSize(){
return _stack.back()-_pos;
}
// ------------------------------------------------------------------------------------------------
template<class T>
T *B3DImporter::to_array( const vector<T> &v ){
if( v.empty() ) {
return 0;
}
T *p=new T[ v.size() ];
for( size_t i=0;i<v.size();++i ){
p[i]=v[i];
}
return p;
}
// ------------------------------------------------------------------------------------------------
void B3DImporter::ReadTEXS(){
while( ChunkSize() ){
string name=ReadString();
/*int flags=*/ReadInt();
/*int blend=*/ReadInt();
/*aiVector2D pos=*/ReadVec2();
/*aiVector2D scale=*/ReadVec2();
/*float rot=*/ReadFloat();
_textures.push_back( name );
}
}
// ------------------------------------------------------------------------------------------------
void B3DImporter::ReadBRUS(){
int n_texs=ReadInt();
if( n_texs<0 || n_texs>8 ){
Fail( "Bad texture count" );
}
while( ChunkSize() ){
string name=ReadString();
aiVector3D color=ReadVec3();
float alpha=ReadFloat();
float shiny=ReadFloat();
/*int blend=**/ReadInt();
int fx=ReadInt();
aiMaterial *mat=new aiMaterial;
_materials.push_back( mat );
// Name
aiString ainame( name );
mat->AddProperty( &ainame,AI_MATKEY_NAME );
// Diffuse color
mat->AddProperty( &color,1,AI_MATKEY_COLOR_DIFFUSE );
// Opacity
mat->AddProperty( &alpha,1,AI_MATKEY_OPACITY );
// Specular color
aiColor3D speccolor( shiny,shiny,shiny );
mat->AddProperty( &speccolor,1,AI_MATKEY_COLOR_SPECULAR );
// Specular power
float specpow=shiny*128;
mat->AddProperty( &specpow,1,AI_MATKEY_SHININESS );
// Double sided
if( fx & 0x10 ){
int i=1;
mat->AddProperty( &i,1,AI_MATKEY_TWOSIDED );
}
//Textures
for( int i=0;i<n_texs;++i ){
int texid=ReadInt();
if( texid<-1 || (texid>=0 && texid>=static_cast<int>(_textures.size())) ){
Fail( "Bad texture id" );
}
if( i==0 && texid>=0 ){
aiString texname( _textures[texid] );
mat->AddProperty( &texname,AI_MATKEY_TEXTURE_DIFFUSE(0) );
}
}
}
}
// ------------------------------------------------------------------------------------------------
void B3DImporter::ReadVRTS(){
_vflags=ReadInt();
_tcsets=ReadInt();
_tcsize=ReadInt();
if( _tcsets<0 || _tcsets>4 || _tcsize<0 || _tcsize>4 ){
Fail( "Bad texcoord data" );
}
int sz=12+(_vflags&1?12:0)+(_vflags&2?16:0)+(_tcsets*_tcsize*4);
int n_verts=ChunkSize()/sz;
int v0=static_cast<int>(_vertices.size());
_vertices.resize( v0+n_verts );
for( int i=0;i<n_verts;++i ){
Vertex &v=_vertices[v0+i];
memset( v.bones,0,sizeof(v.bones) );
memset( v.weights,0,sizeof(v.weights) );
v.vertex=ReadVec3();
if( _vflags & 1 ) v.normal=ReadVec3();
if( _vflags & 2 ) ReadQuat(); //skip v 4bytes...
for( int i=0;i<_tcsets;++i ){
float t[4]={0,0,0,0};
for( int j=0;j<_tcsize;++j ){
t[j]=ReadFloat();
}
t[1]=1-t[1];
if( !i ) v.texcoords=aiVector3D( t[0],t[1],t[2] );
}
}
}
// ------------------------------------------------------------------------------------------------
void B3DImporter::ReadTRIS( int v0 ){
int matid=ReadInt();
if( matid==-1 ){
matid=0;
}else if( matid<0 || matid>=(int)_materials.size() ){
#ifdef DEBUG_B3D
cout<<"material id="<<matid<<endl;
#endif
Fail( "Bad material id" );
}
aiMesh *mesh=new aiMesh;
_meshes.push_back( mesh );
mesh->mMaterialIndex=matid;
mesh->mNumFaces=0;
mesh->mPrimitiveTypes=aiPrimitiveType_TRIANGLE;
int n_tris=ChunkSize()/12;
aiFace *face=mesh->mFaces=new aiFace[n_tris];
for( int i=0;i<n_tris;++i ){
int i0=ReadInt()+v0;
int i1=ReadInt()+v0;
int i2=ReadInt()+v0;
if( i0<0 || i0>=(int)_vertices.size() || i1<0 || i1>=(int)_vertices.size() || i2<0 || i2>=(int)_vertices.size() ){
#ifdef DEBUG_B3D
cout<<"Bad triangle index: i0="<<i0<<", i1="<<i1<<", i2="<<i2<<endl;
#endif
Fail( "Bad triangle index" );
continue;
}
face->mNumIndices=3;
face->mIndices=new unsigned[3];
face->mIndices[0]=i0;
face->mIndices[1]=i1;
face->mIndices[2]=i2;
++mesh->mNumFaces;
++face;
}
}
// ------------------------------------------------------------------------------------------------
void B3DImporter::ReadMESH(){
/*int matid=*/ReadInt();
int v0= static_cast<int>(_vertices.size());
while( ChunkSize() ){
string t=ReadChunk();
if( t=="VRTS" ){
ReadVRTS();
}else if( t=="TRIS" ){
ReadTRIS( v0 );
}
ExitChunk();
}
}
// ------------------------------------------------------------------------------------------------
void B3DImporter::ReadBONE( int id ){
while( ChunkSize() ){
int vertex=ReadInt();
float weight=ReadFloat();
if( vertex<0 || vertex>=(int)_vertices.size() ){
Fail( "Bad vertex index" );
}
Vertex &v=_vertices[vertex];
int i;
for( i=0;i<4;++i ){
if( !v.weights[i] ){
v.bones[i]=id;
v.weights[i]=weight;
break;
}
}
#ifdef DEBUG_B3D
if( i==4 ){
cout<<"Too many bone weights"<<endl;
}
#endif
}
}
// ------------------------------------------------------------------------------------------------
void B3DImporter::ReadKEYS( aiNodeAnim *nodeAnim ){
vector<aiVectorKey> trans,scale;
vector<aiQuatKey> rot;
int flags=ReadInt();
while( ChunkSize() ){
int frame=ReadInt();
if( flags & 1 ){
trans.push_back( aiVectorKey( frame,ReadVec3() ) );
}
if( flags & 2 ){
scale.push_back( aiVectorKey( frame,ReadVec3() ) );
}
if( flags & 4 ){
rot.push_back( aiQuatKey( frame,ReadQuat() ) );
}
}
if( flags & 1 ){
nodeAnim->mNumPositionKeys=static_cast<unsigned int>(trans.size());
nodeAnim->mPositionKeys=to_array( trans );
}
if( flags & 2 ){
nodeAnim->mNumScalingKeys=static_cast<unsigned int>(scale.size());
nodeAnim->mScalingKeys=to_array( scale );
}
if( flags & 4 ){
nodeAnim->mNumRotationKeys=static_cast<unsigned int>(rot.size());
nodeAnim->mRotationKeys=to_array( rot );
}
}
// ------------------------------------------------------------------------------------------------
void B3DImporter::ReadANIM(){
/*int flags=*/ReadInt();
int frames=ReadInt();
float fps=ReadFloat();
aiAnimation *anim=new aiAnimation;
_animations.push_back( anim );
anim->mDuration=frames;
anim->mTicksPerSecond=fps;
}
// ------------------------------------------------------------------------------------------------
aiNode *B3DImporter::ReadNODE( aiNode *parent ){
string name=ReadString();
aiVector3D t=ReadVec3();
aiVector3D s=ReadVec3();
aiQuaternion r=ReadQuat();
aiMatrix4x4 trans,scale,rot;
aiMatrix4x4::Translation( t,trans );
aiMatrix4x4::Scaling( s,scale );
rot=aiMatrix4x4( r.GetMatrix() );
aiMatrix4x4 tform=trans * rot * scale;
int nodeid=static_cast<int>(_nodes.size());
aiNode *node=new aiNode( name );
_nodes.push_back( node );
node->mParent=parent;
node->mTransformation=tform;
aiNodeAnim *nodeAnim=0;
vector<unsigned> meshes;
vector<aiNode*> children;
while( ChunkSize() ){
string t=ReadChunk();
if( t=="MESH" ){
unsigned int n= static_cast<unsigned int>(_meshes.size());
ReadMESH();
for( unsigned int i=n;i<static_cast<unsigned int>(_meshes.size());++i ){
meshes.push_back( i );
}
}else if( t=="BONE" ){
ReadBONE( nodeid );
}else if( t=="ANIM" ){
ReadANIM();
}else if( t=="KEYS" ){
if( !nodeAnim ){
nodeAnim=new aiNodeAnim;
_nodeAnims.push_back( nodeAnim );
nodeAnim->mNodeName=node->mName;
}
ReadKEYS( nodeAnim );
}else if( t=="NODE" ){
aiNode *child=ReadNODE( node );
children.push_back( child );
}
ExitChunk();
}
node->mNumMeshes= static_cast<unsigned int>(meshes.size());
node->mMeshes=to_array( meshes );
node->mNumChildren=static_cast<unsigned int>(children.size());
node->mChildren=to_array( children );
return node;
}
// ------------------------------------------------------------------------------------------------
void B3DImporter::ReadBB3D( aiScene *scene ){
_textures.clear();
_materials.clear();
_vertices.clear();
_meshes.clear();
DeleteAllBarePointers(_nodes);
_nodes.clear();
_nodeAnims.clear();
DeleteAllBarePointers(_animations);
_animations.clear();
string t=ReadChunk();
if( t=="BB3D" ){
int version=ReadInt();
if (!DefaultLogger::isNullLogger()) {
char dmp[128];
ai_snprintf(dmp, 128, "B3D file format version: %i",version);
DefaultLogger::get()->info(dmp);
}
while( ChunkSize() ){
string t=ReadChunk();
if( t=="TEXS" ){
ReadTEXS();
}else if( t=="BRUS" ){
ReadBRUS();
}else if( t=="NODE" ){
ReadNODE( 0 );
}
ExitChunk();
}
}
ExitChunk();
if( !_nodes.size() ) Fail( "No nodes" );
if( !_meshes.size() ) Fail( "No meshes" );
//Fix nodes/meshes/bones
for(size_t i=0;i<_nodes.size();++i ){
aiNode *node=_nodes[i];
for( size_t j=0;j<node->mNumMeshes;++j ){
aiMesh *mesh=_meshes[node->mMeshes[j]];
int n_tris=mesh->mNumFaces;
int n_verts=mesh->mNumVertices=n_tris * 3;
aiVector3D *mv=mesh->mVertices=new aiVector3D[ n_verts ],*mn=0,*mc=0;
if( _vflags & 1 ) mn=mesh->mNormals=new aiVector3D[ n_verts ];
if( _tcsets ) mc=mesh->mTextureCoords[0]=new aiVector3D[ n_verts ];
aiFace *face=mesh->mFaces;
vector< vector<aiVertexWeight> > vweights( _nodes.size() );
for( int i=0;i<n_verts;i+=3 ){
for( int j=0;j<3;++j ){
Vertex &v=_vertices[face->mIndices[j]];
*mv++=v.vertex;
if( mn ) *mn++=v.normal;
if( mc ) *mc++=v.texcoords;
face->mIndices[j]=i+j;
for( int k=0;k<4;++k ){
if( !v.weights[k] ) break;
int bone=v.bones[k];
float weight=v.weights[k];
vweights[bone].push_back( aiVertexWeight(i+j,weight) );
}
}
++face;
}
vector<aiBone*> bones;
for(size_t i=0;i<vweights.size();++i ){
vector<aiVertexWeight> &weights=vweights[i];
if( !weights.size() ) continue;
aiBone *bone=new aiBone;
bones.push_back( bone );
aiNode *bnode=_nodes[i];
bone->mName=bnode->mName;
bone->mNumWeights= static_cast<unsigned int>(weights.size());
bone->mWeights=to_array( weights );
aiMatrix4x4 mat=bnode->mTransformation;
while( bnode->mParent ){
bnode=bnode->mParent;
mat=bnode->mTransformation * mat;
}
bone->mOffsetMatrix=mat.Inverse();
}
mesh->mNumBones= static_cast<unsigned int>(bones.size());
mesh->mBones=to_array( bones );
}
}
//nodes
scene->mRootNode=_nodes[0];
//material
if( !_materials.size() ){
_materials.push_back( new aiMaterial );
}
scene->mNumMaterials= static_cast<unsigned int>(_materials.size());
scene->mMaterials=to_array( _materials );
//meshes
scene->mNumMeshes= static_cast<unsigned int>(_meshes.size());
scene->mMeshes=to_array( _meshes );
//animations
if( _animations.size()==1 && _nodeAnims.size() ){
aiAnimation *anim=_animations.back();
anim->mNumChannels=static_cast<unsigned int>(_nodeAnims.size());
anim->mChannels=to_array( _nodeAnims );
scene->mNumAnimations=static_cast<unsigned int>(_animations.size());
scene->mAnimations=to_array( _animations );
}
// convert to RH
MakeLeftHandedProcess makeleft;
makeleft.Execute( scene );
FlipWindingOrderProcess flip;
flip.Execute( scene );
}
#endif // !! ASSIMP_BUILD_NO_B3D_IMPORTER