| /* |
| Open Asset Import Library (assimp) |
| ---------------------------------------------------------------------- |
| |
| Copyright (c) 2006-2017, assimp team |
| |
| All rights reserved. |
| |
| Redistribution and use of this software in source and binary forms, |
| with or without modification, are permitted provided that the |
| following conditions are met: |
| |
| * Redistributions of source code must retain the above |
| copyright notice, this list of conditions and the |
| following disclaimer. |
| |
| * Redistributions in binary form must reproduce the above |
| copyright notice, this list of conditions and the |
| following disclaimer in the documentation and/or other |
| materials provided with the distribution. |
| |
| * Neither the name of the assimp team, nor the names of its |
| contributors may be used to endorse or promote products |
| derived from this software without specific prior |
| written permission of the assimp team. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| ---------------------------------------------------------------------- |
| */ |
| |
| /** @file DXFHelper.h |
| * @brief Internal utilities for the DXF loader. |
| */ |
| |
| #ifndef INCLUDED_DXFHELPER_H |
| #define INCLUDED_DXFHELPER_H |
| |
| #include "LineSplitter.h" |
| #include "TinyFormatter.h" |
| #include "StreamReader.h" |
| #include "fast_atof.h" |
| #include <vector> |
| #include <assimp/DefaultLogger.hpp> |
| |
| namespace Assimp { |
| namespace DXF { |
| |
| |
| // read pairs of lines, parse group code and value and provide utilities |
| // to convert the data to the target data type. |
| class LineReader |
| { |
| |
| public: |
| |
| LineReader(StreamReaderLE& reader) |
| // do NOT skip empty lines. In DXF files, they count as valid data. |
| : splitter(reader,false,true) |
| , groupcode( 0 ) |
| , value() |
| , end() |
| { |
| } |
| |
| public: |
| |
| |
| // ----------------------------------------- |
| bool Is(int gc, const char* what) const { |
| return groupcode == gc && !strcmp(what,value.c_str()); |
| } |
| |
| // ----------------------------------------- |
| bool Is(int gc) const { |
| return groupcode == gc; |
| } |
| |
| // ----------------------------------------- |
| int GroupCode() const { |
| return groupcode; |
| } |
| |
| // ----------------------------------------- |
| const std::string& Value() const { |
| return value; |
| } |
| |
| // ----------------------------------------- |
| bool End() const { |
| return !((bool)*this); |
| } |
| |
| public: |
| |
| // ----------------------------------------- |
| unsigned int ValueAsUnsignedInt() const { |
| return strtoul10(value.c_str()); |
| } |
| |
| // ----------------------------------------- |
| int ValueAsSignedInt() const { |
| return strtol10(value.c_str()); |
| } |
| |
| // ----------------------------------------- |
| float ValueAsFloat() const { |
| return fast_atof(value.c_str()); |
| } |
| |
| public: |
| |
| // ----------------------------------------- |
| /** pseudo-iterator increment to advance to the next (groupcode/value) pair */ |
| LineReader& operator++() { |
| if (end) { |
| if (end == 1) { |
| ++end; |
| } |
| return *this; |
| } |
| |
| try { |
| groupcode = strtol10(splitter->c_str()); |
| splitter++; |
| |
| value = *splitter; |
| splitter++; |
| |
| // automatically skip over {} meta blocks (these are for application use |
| // and currently not relevant for Assimp). |
| if (value.length() && value[0] == '{') { |
| |
| size_t cnt = 0; |
| for(;splitter->length() && splitter->at(0) != '}'; splitter++, cnt++); |
| |
| splitter++; |
| DefaultLogger::get()->debug((Formatter::format("DXF: skipped over control group ("),cnt," lines)")); |
| } |
| } catch(std::logic_error&) { |
| ai_assert(!splitter); |
| } |
| if (!splitter) { |
| end = 1; |
| } |
| return *this; |
| } |
| |
| // ----------------------------------------- |
| LineReader& operator++(int) { |
| return ++(*this); |
| } |
| |
| |
| // ----------------------------------------- |
| operator bool() const { |
| return end <= 1; |
| } |
| |
| private: |
| |
| LineSplitter splitter; |
| int groupcode; |
| std::string value; |
| int end; |
| }; |
| |
| |
| |
| // represents a POLYLINE or a LWPOLYLINE. or even a 3DFACE The data is converted as needed. |
| struct PolyLine |
| { |
| PolyLine() |
| : flags() |
| {} |
| |
| std::vector<aiVector3D> positions; |
| std::vector<aiColor4D> colors; |
| std::vector<unsigned int> indices; |
| std::vector<unsigned int> counts; |
| unsigned int flags; |
| |
| std::string layer; |
| std::string desc; |
| }; |
| |
| |
| // reference to a BLOCK. Specifies its own coordinate system. |
| struct InsertBlock |
| { |
| InsertBlock() |
| : scale(1.f,1.f,1.f) |
| , angle() |
| {} |
| |
| aiVector3D pos; |
| aiVector3D scale; |
| float angle; |
| |
| std::string name; |
| }; |
| |
| |
| // keeps track of all geometry in a single BLOCK. |
| struct Block |
| { |
| std::vector< std::shared_ptr<PolyLine> > lines; |
| std::vector<InsertBlock> insertions; |
| |
| std::string name; |
| aiVector3D base; |
| }; |
| |
| |
| struct FileData |
| { |
| // note: the LAST block always contains the stuff from ENTITIES. |
| std::vector<Block> blocks; |
| }; |
| |
| |
| |
| |
| |
| }} |
| #endif |