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annotate libs/assimp/DXFHelper.h @ 2:334d17aed7de

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author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 02 Feb 2014 18:36:38 +0200
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nuclear@0 1 /*
nuclear@0 2 Open Asset Import Library (assimp)
nuclear@0 3 ----------------------------------------------------------------------
nuclear@0 4
nuclear@0 5 Copyright (c) 2006-2012, assimp team
nuclear@0 6 All rights reserved.
nuclear@0 7
nuclear@0 8 Redistribution and use of this software in source and binary forms,
nuclear@0 9 with or without modification, are permitted provided that the
nuclear@0 10 following conditions are met:
nuclear@0 11
nuclear@0 12 * Redistributions of source code must retain the above
nuclear@0 13 copyright notice, this list of conditions and the
nuclear@0 14 following disclaimer.
nuclear@0 15
nuclear@0 16 * Redistributions in binary form must reproduce the above
nuclear@0 17 copyright notice, this list of conditions and the
nuclear@0 18 following disclaimer in the documentation and/or other
nuclear@0 19 materials provided with the distribution.
nuclear@0 20
nuclear@0 21 * Neither the name of the assimp team, nor the names of its
nuclear@0 22 contributors may be used to endorse or promote products
nuclear@0 23 derived from this software without specific prior
nuclear@0 24 written permission of the assimp team.
nuclear@0 25
nuclear@0 26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
nuclear@0 27 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
nuclear@0 28 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
nuclear@0 29 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
nuclear@0 30 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
nuclear@0 31 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
nuclear@0 32 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
nuclear@0 33 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
nuclear@0 34 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
nuclear@0 35 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
nuclear@0 36 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
nuclear@0 37
nuclear@0 38 ----------------------------------------------------------------------
nuclear@0 39 */
nuclear@0 40
nuclear@0 41 /** @file DXFHelper.h
nuclear@0 42 * @brief Internal utilities for the DXF loader.
nuclear@0 43 */
nuclear@0 44
nuclear@0 45 #ifndef INCLUDED_DXFHELPER_H
nuclear@0 46 #define INCLUDED_DXFHELPER_H
nuclear@0 47
nuclear@0 48 #include "LineSplitter.h"
nuclear@0 49 #include "TinyFormatter.h"
nuclear@0 50 #include "StreamReader.h"
nuclear@0 51
nuclear@0 52 namespace Assimp {
nuclear@0 53 namespace DXF {
nuclear@0 54
nuclear@0 55
nuclear@0 56 // read pairs of lines, parse group code and value and provide utilities
nuclear@0 57 // to convert the data to the target data type.
nuclear@0 58 class LineReader
nuclear@0 59 {
nuclear@0 60
nuclear@0 61 public:
nuclear@0 62
nuclear@0 63 LineReader(StreamReaderLE& reader)
nuclear@0 64 // do NOT skip empty lines. In DXF files, they count as valid data.
nuclear@0 65 : splitter(reader,false,true)
nuclear@0 66 , end()
nuclear@0 67 {
nuclear@0 68 }
nuclear@0 69
nuclear@0 70 public:
nuclear@0 71
nuclear@0 72
nuclear@0 73 // -----------------------------------------
nuclear@0 74 bool Is(int gc, const char* what) const {
nuclear@0 75 return groupcode == gc && !strcmp(what,value.c_str());
nuclear@0 76 }
nuclear@0 77
nuclear@0 78 // -----------------------------------------
nuclear@0 79 bool Is(int gc) const {
nuclear@0 80 return groupcode == gc;
nuclear@0 81 }
nuclear@0 82
nuclear@0 83 // -----------------------------------------
nuclear@0 84 int GroupCode() const {
nuclear@0 85 return groupcode;
nuclear@0 86 }
nuclear@0 87
nuclear@0 88 // -----------------------------------------
nuclear@0 89 const std::string& Value() const {
nuclear@0 90 return value;
nuclear@0 91 }
nuclear@0 92
nuclear@0 93 // -----------------------------------------
nuclear@0 94 bool End() const {
nuclear@0 95 return !((bool)*this);
nuclear@0 96 }
nuclear@0 97
nuclear@0 98 public:
nuclear@0 99
nuclear@0 100 // -----------------------------------------
nuclear@0 101 unsigned int ValueAsUnsignedInt() const {
nuclear@0 102 return strtoul10(value.c_str());
nuclear@0 103 }
nuclear@0 104
nuclear@0 105 // -----------------------------------------
nuclear@0 106 int ValueAsSignedInt() const {
nuclear@0 107 return strtol10(value.c_str());
nuclear@0 108 }
nuclear@0 109
nuclear@0 110 // -----------------------------------------
nuclear@0 111 float ValueAsFloat() const {
nuclear@0 112 return fast_atof(value.c_str());
nuclear@0 113 }
nuclear@0 114
nuclear@0 115 public:
nuclear@0 116
nuclear@0 117 // -----------------------------------------
nuclear@0 118 /** pseudo-iterator increment to advance to the next (groupcode/value) pair */
nuclear@0 119 LineReader& operator++() {
nuclear@0 120 if (end) {
nuclear@0 121 if (end == 1) {
nuclear@0 122 ++end;
nuclear@0 123 }
nuclear@0 124 return *this;
nuclear@0 125 }
nuclear@0 126
nuclear@0 127 try {
nuclear@0 128 groupcode = strtol10(splitter->c_str());
nuclear@0 129 splitter++;
nuclear@0 130
nuclear@0 131 value = *splitter;
nuclear@0 132 splitter++;
nuclear@0 133
nuclear@0 134 // automatically skip over {} meta blocks (these are for application use
nuclear@0 135 // and currently not relevant for Assimp).
nuclear@0 136 if (value.length() && value[0] == '{') {
nuclear@0 137
nuclear@0 138 size_t cnt = 0;
nuclear@0 139 for(;splitter->length() && splitter->at(0) != '}'; splitter++, cnt++);
nuclear@0 140
nuclear@0 141 splitter++;
nuclear@0 142 DefaultLogger::get()->debug((Formatter::format("DXF: skipped over control group ("),cnt," lines)"));
nuclear@0 143 }
nuclear@0 144 } catch(std::logic_error&) {
nuclear@0 145 ai_assert(!splitter);
nuclear@0 146 }
nuclear@0 147 if (!splitter) {
nuclear@0 148 end = 1;
nuclear@0 149 }
nuclear@0 150 return *this;
nuclear@0 151 }
nuclear@0 152
nuclear@0 153 // -----------------------------------------
nuclear@0 154 LineReader& operator++(int) {
nuclear@0 155 return ++(*this);
nuclear@0 156 }
nuclear@0 157
nuclear@0 158
nuclear@0 159 // -----------------------------------------
nuclear@0 160 operator bool() const {
nuclear@0 161 return end <= 1;
nuclear@0 162 }
nuclear@0 163
nuclear@0 164 private:
nuclear@0 165
nuclear@0 166 LineSplitter splitter;
nuclear@0 167 int groupcode;
nuclear@0 168 std::string value;
nuclear@0 169 int end;
nuclear@0 170 };
nuclear@0 171
nuclear@0 172
nuclear@0 173
nuclear@0 174 // represents a POLYLINE or a LWPOLYLINE. or even a 3DFACE The data is converted as needed.
nuclear@0 175 struct PolyLine
nuclear@0 176 {
nuclear@0 177 PolyLine()
nuclear@0 178 : flags()
nuclear@0 179 {}
nuclear@0 180
nuclear@0 181 std::vector<aiVector3D> positions;
nuclear@0 182 std::vector<aiColor4D> colors;
nuclear@0 183 std::vector<unsigned int> indices;
nuclear@0 184 std::vector<unsigned int> counts;
nuclear@0 185 unsigned int flags;
nuclear@0 186
nuclear@0 187 std::string layer;
nuclear@0 188 std::string desc;
nuclear@0 189 };
nuclear@0 190
nuclear@0 191
nuclear@0 192 // reference to a BLOCK. Specifies its own coordinate system.
nuclear@0 193 struct InsertBlock
nuclear@0 194 {
nuclear@0 195 InsertBlock()
nuclear@0 196 : scale(1.f,1.f,1.f)
nuclear@0 197 , angle()
nuclear@0 198 {}
nuclear@0 199
nuclear@0 200 aiVector3D pos;
nuclear@0 201 aiVector3D scale;
nuclear@0 202 float angle;
nuclear@0 203
nuclear@0 204 std::string name;
nuclear@0 205 };
nuclear@0 206
nuclear@0 207
nuclear@0 208 // keeps track of all geometry in a single BLOCK.
nuclear@0 209 struct Block
nuclear@0 210 {
nuclear@0 211 std::vector< boost::shared_ptr<PolyLine> > lines;
nuclear@0 212 std::vector<InsertBlock> insertions;
nuclear@0 213
nuclear@0 214 std::string name;
nuclear@0 215 aiVector3D base;
nuclear@0 216 };
nuclear@0 217
nuclear@0 218
nuclear@0 219 struct FileData
nuclear@0 220 {
nuclear@0 221 // note: the LAST block always contains the stuff from ENTITIES.
nuclear@0 222 std::vector<Block> blocks;
nuclear@0 223 };
nuclear@0 224
nuclear@0 225
nuclear@0 226
nuclear@0 227
nuclear@0 228
nuclear@0 229 }}
nuclear@0 230 #endif