/* --------------------------------------------------------------------------- Open Asset Import Library (assimp) --------------------------------------------------------------------------- Copyright (c) 2006-2024, 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 DXFLoader.cpp * @brief Implementation of the DXF importer class */ #ifndef ASSIMP_BUILD_NO_DXF_IMPORTER #include "AssetLib/DXF/DXFLoader.h" #include "AssetLib/DXF/DXFHelper.h" #include "PostProcessing/ConvertToLHProcess.h" #include #include #include #include #include #include #include using namespace Assimp; // AutoCAD Binary DXF static constexpr char AI_DXF_BINARY_IDENT[] = "AutoCAD Binary DXF\r\n\x1a"; static constexpr size_t AI_DXF_BINARY_IDENT_LEN = sizeof AI_DXF_BINARY_IDENT; // default vertex color that all uncolored vertices will receive static const aiColor4D AI_DXF_DEFAULT_COLOR(aiColor4D(0.6f, 0.6f, 0.6f, 0.6f)); // color indices for DXF - 256 are supported, the table is // taken directly from the AutoCad Index (ACI) table // https://gohtx.com/acadcolors.php //STH 2024-0126 static constexpr aiColor4D g_aclrDxfIndexColors[256] = { aiColor4D (0.0f, 0.0f ,0.0f, 1.0f), //dxf color code 0 aiColor4D (1.0f, 0.0f ,0.0f, 1.0f), //dxf color code 1 aiColor4D (1.0f, 1.0f ,0.0f, 1.0f), //dxf color code 2 aiColor4D (0.0f, 1.0f ,0.0f, 1.0f), //dxf color code 3 aiColor4D (0.0f, 1.0f ,1.0f, 1.0f), //dxf color code 4 aiColor4D (0.0f, 0.0f ,1.0f, 1.0f), //dxf color code 5 aiColor4D (1.0f, 0.0f ,1.0f, 1.0f), //dxf color code 6 aiColor4D (1.0f, 1.0f ,1.0f, 1.0f), //dxf color code 7 aiColor4D (0.3f, 0.3f ,0.3f, 1.0f), //dxf color code 8 aiColor4D (0.5f, 0.5f ,0.5f, 1.0f), //dxf color code 9 aiColor4D (1.0f, 0.0f ,0.0f, 1.0f), //dxf color code 10 aiColor4D (1.0f, 0.7f ,0.7f, 1.0f), //dxf color code 11 aiColor4D (0.7f, 0.0f ,0.0f, 1.0f), //dxf color code 12 aiColor4D (0.7f, 0.5f ,0.5f, 1.0f), //dxf color code 13 aiColor4D (0.5f, 0.0f ,0.0f, 1.0f), //dxf color code 14 aiColor4D (0.5f, 0.3f ,0.3f, 1.0f), //dxf color code 15 aiColor4D (0.4f, 0.0f ,0.0f, 1.0f), //dxf color code 16 aiColor4D (0.4f, 0.3f ,0.3f, 1.0f), //dxf color code 17 aiColor4D (0.3f, 0.0f ,0.0f, 1.0f), //dxf color code 18 aiColor4D (0.3f, 0.2f ,0.2f, 1.0f), //dxf color code 19 aiColor4D (1.0f, 0.2f ,0.0f, 1.0f), //dxf color code 20 aiColor4D (1.0f, 0.7f ,0.7f, 1.0f), //dxf color code 21 aiColor4D (0.7f, 0.2f ,0.0f, 1.0f), //dxf color code 22 aiColor4D (0.7f, 0.6f ,0.5f, 1.0f), //dxf color code 23 aiColor4D (0.5f, 0.1f ,0.0f, 1.0f), //dxf color code 24 aiColor4D (0.5f, 0.4f ,0.3f, 1.0f), //dxf color code 25 aiColor4D (0.4f, 0.1f ,0.0f, 1.0f), //dxf color code 26 aiColor4D (0.4f, 0.3f ,0.3f, 1.0f), //dxf color code 27 aiColor4D (0.3f, 0.1f ,0.0f, 1.0f), //dxf color code 28 aiColor4D (0.3f, 0.2f ,0.2f, 1.0f), //dxf color code 29 aiColor4D (1.0f, 0.5f ,0.0f, 1.0f), //dxf color code 30 aiColor4D (1.0f, 0.8f ,0.7f, 1.0f), //dxf color code 31 aiColor4D (0.7f, 0.4f ,0.0f, 1.0f), //dxf color code 32 aiColor4D (0.7f, 0.6f ,0.5f, 1.0f), //dxf color code 33 aiColor4D (0.5f, 0.3f ,0.0f, 1.0f), //dxf color code 34 aiColor4D (0.5f, 0.4f ,0.3f, 1.0f), //dxf color code 35 aiColor4D (0.4f, 0.2f ,0.0f, 1.0f), //dxf color code 36 aiColor4D (0.4f, 0.3f ,0.3f, 1.0f), //dxf color code 37 aiColor4D (0.3f, 0.2f ,0.0f, 1.0f), //dxf color code 38 aiColor4D (0.3f, 0.3f ,0.2f, 1.0f), //dxf color code 39 aiColor4D (1.0f, 0.7f ,0.0f, 1.0f), //dxf color code 40 aiColor4D (1.0f, 0.9f ,0.7f, 1.0f), //dxf color code 41 aiColor4D (0.7f, 0.6f ,0.0f, 1.0f), //dxf color code 42 aiColor4D (0.7f, 0.7f ,0.5f, 1.0f), //dxf color code 43 aiColor4D (0.5f, 0.4f ,0.0f, 1.0f), //dxf color code 44 aiColor4D (0.5f, 0.5f ,0.3f, 1.0f), //dxf color code 45 aiColor4D (0.4f, 0.3f ,0.0f, 1.0f), //dxf color code 46 aiColor4D (0.4f, 0.4f ,0.3f, 1.0f), //dxf color code 47 aiColor4D (0.3f, 0.2f ,0.0f, 1.0f), //dxf color code 48 aiColor4D (0.3f, 0.3f ,0.2f, 1.0f), //dxf color code 49 aiColor4D (1.0f, 1.0f ,0.0f, 1.0f), //dxf color code 50 aiColor4D (1.0f, 1.0f ,0.7f, 1.0f), //dxf color code 51 aiColor4D (0.7f, 0.7f ,0.0f, 1.0f), //dxf color code 52 aiColor4D (0.7f, 0.7f ,0.5f, 1.0f), //dxf color code 53 aiColor4D (0.5f, 0.5f ,0.0f, 1.0f), //dxf color code 54 aiColor4D (0.5f, 0.5f ,0.3f, 1.0f), //dxf color code 55 aiColor4D (0.4f, 0.4f ,0.0f, 1.0f), //dxf color code 56 aiColor4D (0.4f, 0.4f ,0.3f, 1.0f), //dxf color code 57 aiColor4D (0.3f, 0.3f ,0.0f, 1.0f), //dxf color code 58 aiColor4D (0.3f, 0.3f ,0.2f, 1.0f), //dxf color code 59 aiColor4D (0.7f, 1.0f ,0.0f, 1.0f), //dxf color code 60 aiColor4D (0.9f, 1.0f ,0.7f, 1.0f), //dxf color code 61 aiColor4D (0.6f, 0.7f ,0.0f, 1.0f), //dxf color code 62 aiColor4D (0.7f, 0.7f ,0.5f, 1.0f), //dxf color code 63 aiColor4D (0.4f, 0.5f ,0.0f, 1.0f), //dxf color code 64 aiColor4D (0.5f, 0.5f ,0.3f, 1.0f), //dxf color code 65 aiColor4D (0.3f, 0.4f ,0.0f, 1.0f), //dxf color code 66 aiColor4D (0.4f, 0.4f ,0.3f, 1.0f), //dxf color code 67 aiColor4D (0.2f, 0.3f ,0.0f, 1.0f), //dxf color code 68 aiColor4D (0.3f, 0.3f ,0.2f, 1.0f), //dxf color code 69 aiColor4D (0.5f, 1.0f ,0.0f, 1.0f), //dxf color code 70 aiColor4D (0.8f, 1.0f ,0.7f, 1.0f), //dxf color code 71 aiColor4D (0.4f, 0.7f ,0.0f, 1.0f), //dxf color code 72 aiColor4D (0.6f, 0.7f ,0.5f, 1.0f), //dxf color code 73 aiColor4D (0.3f, 0.5f ,0.0f, 1.0f), //dxf color code 74 aiColor4D (0.4f, 0.5f ,0.3f, 1.0f), //dxf color code 75 aiColor4D (0.2f, 0.4f ,0.0f, 1.0f), //dxf color code 76 aiColor4D (0.3f, 0.4f ,0.3f, 1.0f), //dxf color code 77 aiColor4D (0.2f, 0.3f ,0.0f, 1.0f), //dxf color code 78 aiColor4D (0.3f, 0.3f ,0.2f, 1.0f), //dxf color code 79 aiColor4D (0.2f, 1.0f ,0.0f, 1.0f), //dxf color code 80 aiColor4D (0.7f, 1.0f ,0.7f, 1.0f), //dxf color code 81 aiColor4D (0.2f, 0.7f ,0.0f, 1.0f), //dxf color code 82 aiColor4D (0.6f, 0.7f ,0.5f, 1.0f), //dxf color code 83 aiColor4D (0.1f, 0.5f ,0.0f, 1.0f), //dxf color code 84 aiColor4D (0.4f, 0.5f ,0.3f, 1.0f), //dxf color code 85 aiColor4D (0.1f, 0.4f ,0.0f, 1.0f), //dxf color code 86 aiColor4D (0.3f, 0.4f ,0.3f, 1.0f), //dxf color code 87 aiColor4D (0.1f, 0.3f ,0.0f, 1.0f), //dxf color code 88 aiColor4D (0.2f, 0.3f ,0.2f, 1.0f), //dxf color code 89 aiColor4D (0.0f, 1.0f ,0.0f, 1.0f), //dxf color code 90 aiColor4D (0.7f, 1.0f ,0.7f, 1.0f), //dxf color code 91 aiColor4D (0.0f, 0.7f ,0.0f, 1.0f), //dxf color code 92 aiColor4D (0.5f, 0.7f ,0.5f, 1.0f), //dxf color code 93 aiColor4D (0.0f, 0.5f ,0.0f, 1.0f), //dxf color code 94 aiColor4D (0.3f, 0.5f ,0.3f, 1.0f), //dxf color code 95 aiColor4D (0.0f, 0.4f ,0.0f, 1.0f), //dxf color code 96 aiColor4D (0.3f, 0.4f ,0.3f, 1.0f), //dxf color code 97 aiColor4D (0.0f, 0.3f ,0.0f, 1.0f), //dxf color code 98 aiColor4D (0.2f, 0.3f ,0.2f, 1.0f), //dxf color code 99 aiColor4D (0.0f, 1.0f ,0.2f, 1.0f), //dxf color code 100 aiColor4D (0.7f, 1.0f ,0.7f, 1.0f), //dxf color code 101 aiColor4D (0.0f, 0.7f ,0.2f, 1.0f), //dxf color code 102 aiColor4D (0.5f, 0.7f ,0.6f, 1.0f), //dxf color code 103 aiColor4D (0.0f, 0.5f ,0.1f, 1.0f), //dxf color code 104 aiColor4D (0.3f, 0.5f ,0.4f, 1.0f), //dxf color code 105 aiColor4D (0.0f, 0.4f ,0.1f, 1.0f), //dxf color code 106 aiColor4D (0.3f, 0.4f ,0.3f, 1.0f), //dxf color code 107 aiColor4D (0.0f, 0.3f ,0.1f, 1.0f), //dxf color code 108 aiColor4D (0.2f, 0.3f ,0.2f, 1.0f), //dxf color code 109 aiColor4D (0.0f, 1.0f ,0.5f, 1.0f), //dxf color code 110 aiColor4D (0.7f, 1.0f ,0.8f, 1.0f), //dxf color code 111 aiColor4D (0.0f, 0.7f ,0.4f, 1.0f), //dxf color code 112 aiColor4D (0.5f, 0.7f ,0.6f, 1.0f), //dxf color code 113 aiColor4D (0.0f, 0.5f ,0.3f, 1.0f), //dxf color code 114 aiColor4D (0.3f, 0.5f ,0.4f, 1.0f), //dxf color code 115 aiColor4D (0.0f, 0.4f ,0.2f, 1.0f), //dxf color code 116 aiColor4D (0.3f, 0.4f ,0.3f, 1.0f), //dxf color code 117 aiColor4D (0.0f, 0.3f ,0.2f, 1.0f), //dxf color code 118 aiColor4D (0.2f, 0.3f ,0.3f, 1.0f), //dxf color code 119 aiColor4D (0.0f, 1.0f ,0.7f, 1.0f), //dxf color code 120 aiColor4D (0.7f, 1.0f ,0.9f, 1.0f), //dxf color code 121 aiColor4D (0.0f, 0.7f ,0.6f, 1.0f), //dxf color code 122 aiColor4D (0.5f, 0.7f ,0.7f, 1.0f), //dxf color code 123 aiColor4D (0.0f, 0.5f ,0.4f, 1.0f), //dxf color code 124 aiColor4D (0.3f, 0.5f ,0.5f, 1.0f), //dxf color code 125 aiColor4D (0.0f, 0.4f ,0.3f, 1.0f), //dxf color code 126 aiColor4D (0.3f, 0.4f ,0.4f, 1.0f), //dxf color code 127 aiColor4D (0.0f, 0.3f ,0.2f, 1.0f), //dxf color code 128 aiColor4D (0.2f, 0.3f ,0.3f, 1.0f), //dxf color code 129 aiColor4D (0.0f, 1.0f ,1.0f, 1.0f), //dxf color code 130 aiColor4D (0.7f, 1.0f ,1.0f, 1.0f), //dxf color code 131 aiColor4D (0.0f, 0.7f ,0.7f, 1.0f), //dxf color code 132 aiColor4D (0.5f, 0.7f ,0.7f, 1.0f), //dxf color code 133 aiColor4D (0.0f, 0.5f ,0.5f, 1.0f), //dxf color code 134 aiColor4D (0.3f, 0.5f ,0.5f, 1.0f), //dxf color code 135 aiColor4D (0.0f, 0.4f ,0.4f, 1.0f), //dxf color code 136 aiColor4D (0.3f, 0.4f ,0.4f, 1.0f), //dxf color code 137 aiColor4D (0.0f, 0.3f ,0.3f, 1.0f), //dxf color code 138 aiColor4D (0.2f, 0.3f ,0.3f, 1.0f), //dxf color code 139 aiColor4D (0.0f, 0.7f ,1.0f, 1.0f), //dxf color code 140 aiColor4D (0.7f, 0.9f ,1.0f, 1.0f), //dxf color code 141 aiColor4D (0.0f, 0.6f ,0.7f, 1.0f), //dxf color code 142 aiColor4D (0.5f, 0.7f ,0.7f, 1.0f), //dxf color code 143 aiColor4D (0.0f, 0.4f ,0.5f, 1.0f), //dxf color code 144 aiColor4D (0.3f, 0.5f ,0.5f, 1.0f), //dxf color code 145 aiColor4D (0.0f, 0.3f ,0.4f, 1.0f), //dxf color code 146 aiColor4D (0.3f, 0.4f ,0.4f, 1.0f), //dxf color code 147 aiColor4D (0.0f, 0.2f ,0.3f, 1.0f), //dxf color code 148 aiColor4D (0.2f, 0.3f ,0.3f, 1.0f), //dxf color code 149 aiColor4D (0.0f, 0.5f ,1.0f, 1.0f), //dxf color code 150 aiColor4D (0.7f, 0.8f ,1.0f, 1.0f), //dxf color code 151 aiColor4D (0.0f, 0.4f ,0.7f, 1.0f), //dxf color code 152 aiColor4D (0.5f, 0.6f ,0.7f, 1.0f), //dxf color code 153 aiColor4D (0.0f, 0.3f ,0.5f, 1.0f), //dxf color code 154 aiColor4D (0.3f, 0.4f ,0.5f, 1.0f), //dxf color code 155 aiColor4D (0.0f, 0.2f ,0.4f, 1.0f), //dxf color code 156 aiColor4D (0.3f, 0.3f ,0.4f, 1.0f), //dxf color code 157 aiColor4D (0.0f, 0.2f ,0.3f, 1.0f), //dxf color code 158 aiColor4D (0.2f, 0.3f ,0.3f, 1.0f), //dxf color code 159 aiColor4D (0.0f, 0.2f ,1.0f, 1.0f), //dxf color code 160 aiColor4D (0.7f, 0.7f ,1.0f, 1.0f), //dxf color code 161 aiColor4D (0.0f, 0.2f ,0.7f, 1.0f), //dxf color code 162 aiColor4D (0.5f, 0.6f ,0.7f, 1.0f), //dxf color code 163 aiColor4D (0.0f, 0.1f ,0.5f, 1.0f), //dxf color code 164 aiColor4D (0.3f, 0.4f ,0.5f, 1.0f), //dxf color code 165 aiColor4D (0.0f, 0.1f ,0.4f, 1.0f), //dxf color code 166 aiColor4D (0.3f, 0.3f ,0.4f, 1.0f), //dxf color code 167 aiColor4D (0.0f, 0.1f ,0.3f, 1.0f), //dxf color code 168 aiColor4D (0.2f, 0.2f ,0.3f, 1.0f), //dxf color code 169 aiColor4D (0.0f, 0.0f ,1.0f, 1.0f), //dxf color code 170 aiColor4D (0.7f, 0.7f ,1.0f, 1.0f), //dxf color code 171 aiColor4D (0.0f, 0.0f ,0.7f, 1.0f), //dxf color code 172 aiColor4D (0.5f, 0.5f ,0.7f, 1.0f), //dxf color code 173 aiColor4D (0.0f, 0.0f ,0.5f, 1.0f), //dxf color code 174 aiColor4D (0.3f, 0.3f ,0.5f, 1.0f), //dxf color code 175 aiColor4D (0.0f, 0.0f ,0.4f, 1.0f), //dxf color code 176 aiColor4D (0.3f, 0.3f ,0.4f, 1.0f), //dxf color code 177 aiColor4D (0.0f, 0.0f ,0.3f, 1.0f), //dxf color code 178 aiColor4D (0.2f, 0.2f ,0.3f, 1.0f), //dxf color code 179 aiColor4D (0.2f, 0.0f ,1.0f, 1.0f), //dxf color code 180 aiColor4D (0.7f, 0.7f ,1.0f, 1.0f), //dxf color code 181 aiColor4D (0.2f, 0.0f ,0.7f, 1.0f), //dxf color code 182 aiColor4D (0.6f, 0.5f ,0.7f, 1.0f), //dxf color code 183 aiColor4D (0.1f, 0.0f ,0.5f, 1.0f), //dxf color code 184 aiColor4D (0.4f, 0.3f ,0.5f, 1.0f), //dxf color code 185 aiColor4D (0.1f, 0.0f ,0.4f, 1.0f), //dxf color code 186 aiColor4D (0.3f, 0.3f ,0.4f, 1.0f), //dxf color code 187 aiColor4D (0.1f, 0.0f ,0.3f, 1.0f), //dxf color code 188 aiColor4D (0.2f, 0.2f ,0.3f, 1.0f), //dxf color code 189 aiColor4D (0.5f, 0.0f ,1.0f, 1.0f), //dxf color code 190 aiColor4D (0.8f, 0.7f ,1.0f, 1.0f), //dxf color code 191 aiColor4D (0.4f, 0.0f ,0.7f, 1.0f), //dxf color code 192 aiColor4D (0.6f, 0.5f ,0.7f, 1.0f), //dxf color code 193 aiColor4D (0.3f, 0.0f ,0.5f, 1.0f), //dxf color code 194 aiColor4D (0.4f, 0.3f ,0.5f, 1.0f), //dxf color code 195 aiColor4D (0.2f, 0.0f ,0.4f, 1.0f), //dxf color code 196 aiColor4D (0.3f, 0.3f ,0.4f, 1.0f), //dxf color code 197 aiColor4D (0.2f, 0.0f ,0.3f, 1.0f), //dxf color code 198 aiColor4D (0.3f, 0.2f ,0.3f, 1.0f), //dxf color code 199 aiColor4D (0.7f, 0.0f ,1.0f, 1.0f), //dxf color code 200 aiColor4D (0.9f, 0.7f ,1.0f, 1.0f), //dxf color code 201 aiColor4D (0.6f, 0.0f ,0.7f, 1.0f), //dxf color code 202 aiColor4D (0.7f, 0.5f ,0.7f, 1.0f), //dxf color code 203 aiColor4D (0.4f, 0.0f ,0.5f, 1.0f), //dxf color code 204 aiColor4D (0.5f, 0.3f ,0.5f, 1.0f), //dxf color code 205 aiColor4D (0.3f, 0.0f ,0.4f, 1.0f), //dxf color code 206 aiColor4D (0.4f, 0.3f ,0.4f, 1.0f), //dxf color code 207 aiColor4D (0.2f, 0.0f ,0.3f, 1.0f), //dxf color code 208 aiColor4D (0.3f, 0.2f ,0.3f, 1.0f), //dxf color code 209 aiColor4D (1.0f, 0.0f ,1.0f, 1.0f), //dxf color code 210 aiColor4D (1.0f, 0.7f ,1.0f, 1.0f), //dxf color code 211 aiColor4D (0.7f, 0.0f ,0.7f, 1.0f), //dxf color code 212 aiColor4D (0.7f, 0.5f ,0.7f, 1.0f), //dxf color code 213 aiColor4D (0.5f, 0.0f ,0.5f, 1.0f), //dxf color code 214 aiColor4D (0.5f, 0.3f ,0.5f, 1.0f), //dxf color code 215 aiColor4D (0.4f, 0.0f ,0.4f, 1.0f), //dxf color code 216 aiColor4D (0.4f, 0.3f ,0.4f, 1.0f), //dxf color code 217 aiColor4D (0.3f, 0.0f ,0.3f, 1.0f), //dxf color code 218 aiColor4D (0.3f, 0.2f ,0.3f, 1.0f), //dxf color code 219 aiColor4D (1.0f, 0.0f ,0.7f, 1.0f), //dxf color code 220 aiColor4D (1.0f, 0.7f ,0.9f, 1.0f), //dxf color code 221 aiColor4D (0.7f, 0.0f ,0.6f, 1.0f), //dxf color code 222 aiColor4D (0.7f, 0.5f ,0.7f, 1.0f), //dxf color code 223 aiColor4D (0.5f, 0.0f ,0.4f, 1.0f), //dxf color code 224 aiColor4D (0.5f, 0.3f ,0.5f, 1.0f), //dxf color code 225 aiColor4D (0.4f, 0.0f ,0.3f, 1.0f), //dxf color code 226 aiColor4D (0.4f, 0.3f ,0.4f, 1.0f), //dxf color code 227 aiColor4D (0.3f, 0.0f ,0.2f, 1.0f), //dxf color code 228 aiColor4D (0.3f, 0.2f ,0.3f, 1.0f), //dxf color code 229 aiColor4D (1.0f, 0.0f ,0.5f, 1.0f), //dxf color code 230 aiColor4D (1.0f, 0.7f ,0.8f, 1.0f), //dxf color code 231 aiColor4D (0.7f, 0.0f ,0.4f, 1.0f), //dxf color code 232 aiColor4D (0.7f, 0.5f ,0.6f, 1.0f), //dxf color code 233 aiColor4D (0.5f, 0.0f ,0.3f, 1.0f), //dxf color code 234 aiColor4D (0.5f, 0.3f ,0.4f, 1.0f), //dxf color code 235 aiColor4D (0.4f, 0.0f ,0.2f, 1.0f), //dxf color code 236 aiColor4D (0.4f, 0.3f ,0.3f, 1.0f), //dxf color code 237 aiColor4D (0.3f, 0.0f ,0.2f, 1.0f), //dxf color code 238 aiColor4D (0.3f, 0.2f ,0.3f, 1.0f), //dxf color code 239 aiColor4D (1.0f, 0.0f ,0.2f, 1.0f), //dxf color code 240 aiColor4D (1.0f, 0.7f ,0.7f, 1.0f), //dxf color code 241 aiColor4D (0.7f, 0.0f ,0.2f, 1.0f), //dxf color code 242 aiColor4D (0.7f, 0.5f ,0.6f, 1.0f), //dxf color code 243 aiColor4D (0.5f, 0.0f ,0.1f, 1.0f), //dxf color code 244 aiColor4D (0.5f, 0.3f ,0.4f, 1.0f), //dxf color code 245 aiColor4D (0.4f, 0.0f ,0.1f, 1.0f), //dxf color code 246 aiColor4D (0.4f, 0.3f ,0.3f, 1.0f), //dxf color code 247 aiColor4D (0.3f, 0.0f ,0.1f, 1.0f), //dxf color code 248 aiColor4D (0.3f, 0.2f ,0.2f, 1.0f), //dxf color code 249 aiColor4D (0.2f, 0.2f ,0.2f, 1.0f), //dxf color code 250 aiColor4D (0.3f, 0.3f ,0.3f, 1.0f), //dxf color code 251 aiColor4D (0.4f, 0.4f ,0.4f, 1.0f), //dxf color code 252 aiColor4D (0.5f, 0.5f ,0.5f, 1.0f), //dxf color code 253 aiColor4D (0.7f, 0.7f ,0.7f, 1.0f), //dxf color code 254 aiColor4D (1.0f, 1.0f ,1.0f, 1.0f) //dxf color code 255 }; #define AI_DXF_NUM_INDEX_COLORS (sizeof(g_aclrDxfIndexColors)/sizeof(g_aclrDxfIndexColors[0])) #define AI_DXF_ENTITIES_MAGIC_BLOCK "$ASSIMP_ENTITIES_MAGIC" static const int GroupCode_Name = 2; static const int GroupCode_XComp = 10; static const int GroupCode_YComp = 20; static const int GroupCode_ZComp = 30; static constexpr aiImporterDesc desc = { "Drawing Interchange Format (DXF) Importer", "", "", "", aiImporterFlags_SupportTextFlavour | aiImporterFlags_LimitedSupport, 0, 0, 0, 0, "dxf" }; // ------------------------------------------------------------------------------------------------ // Returns whether the class can handle the format of the given file. bool DXFImporter::CanRead( const std::string& filename, IOSystem* pIOHandler, bool /*checkSig*/ ) const { static const char *tokens[] = { "SECTION", "HEADER", "ENDSEC", "BLOCKS" }; return SearchFileHeaderForToken(pIOHandler, filename, tokens, AI_COUNT_OF(tokens), 32); } // ------------------------------------------------------------------------------------------------ // Get a list of all supported file extensions const aiImporterDesc* DXFImporter::GetInfo () const { return &desc; } // ------------------------------------------------------------------------------------------------ // Imports the given file into the given scene structure. void DXFImporter::InternReadFile( const std::string& filename, aiScene* pScene, IOSystem* pIOHandler) { std::shared_ptr file = std::shared_ptr( pIOHandler->Open( filename) ); // Check whether we can read the file if (file == nullptr) { throw DeadlyImportError( "Failed to open DXF file ", filename, ""); } // Check whether this is a binary DXF file - we can't read binary DXF files :-( char buff[AI_DXF_BINARY_IDENT_LEN] = {0}; file->Read(buff,AI_DXF_BINARY_IDENT_LEN,1); if (0 == memcmp(AI_DXF_BINARY_IDENT,buff,AI_DXF_BINARY_IDENT_LEN)) { throw DeadlyImportError("DXF: Binary files are not supported at the moment"); } // DXF files can grow very large, so read them via the StreamReader, // which will choose a suitable strategy. file->Seek(0,aiOrigin_SET); StreamReaderLE stream( std::move(file) ); DXF::LineReader reader (stream); DXF::FileData output; // now get all lines of the file and process top-level sections bool eof = false; while(!reader.End()) { // blocks table - these 'build blocks' are later (in ENTITIES) // referenced an included via INSERT statements. if (reader.Is(2,"BLOCKS")) { ParseBlocks(reader,output); continue; } // primary entity table if (reader.Is(2,"ENTITIES")) { ParseEntities(reader,output); continue; } // skip unneeded sections entirely to avoid any problems with them // altogether. else if (reader.Is(2,"CLASSES") || reader.Is(2,"TABLES")) { SkipSection(reader); continue; } else if (reader.Is(2,"HEADER")) { ParseHeader(reader,output); continue; } // comments else if (reader.Is(999)) { ASSIMP_LOG_INFO("DXF Comment: ", reader.Value()); } // don't read past the official EOF sign else if (reader.Is(0,"EOF")) { eof = true; break; } ++reader; } if (!eof) { ASSIMP_LOG_WARN("DXF: EOF reached, but did not encounter DXF EOF marker"); } ConvertMeshes(pScene,output); // Now rotate the whole scene by 90 degrees around the x axis to convert from AutoCAD's to Assimp's coordinate system pScene->mRootNode->mTransformation = aiMatrix4x4( 1.f,0.f,0.f,0.f, 0.f,0.f,1.f,0.f, 0.f,-1.f,0.f,0.f, 0.f,0.f,0.f,1.f) * pScene->mRootNode->mTransformation; } // ------------------------------------------------------------------------------------------------ void DXFImporter::ConvertMeshes(aiScene* pScene, DXF::FileData& output) { // the process of resolving all the INSERT statements can grow the // poly-count excessively, so log the original number. // XXX Option to import blocks as separate nodes? if (!DefaultLogger::isNullLogger()) { unsigned int vcount = 0, icount = 0; for (const DXF::Block& bl : output.blocks) { for (std::shared_ptr pl : bl.lines) { vcount += static_cast(pl->positions.size()); icount += static_cast(pl->counts.size()); } } ASSIMP_LOG_VERBOSE_DEBUG("DXF: Unexpanded polycount is ", icount, ", vertex count is ", vcount); } if (output.blocks.empty()) { throw DeadlyImportError("DXF: no data blocks loaded"); } DXF::Block* entities( nullptr ); // index blocks by name DXF::BlockMap blocks_by_name; for (DXF::Block& bl : output.blocks) { blocks_by_name[bl.name] = &bl; if ( !entities && bl.name == AI_DXF_ENTITIES_MAGIC_BLOCK ) { entities = &bl; } } if (!entities) { throw DeadlyImportError("DXF: no ENTITIES data block loaded"); } typedef std::map LayerMap; LayerMap layers; std::vector< std::vector< const DXF::PolyLine*> > corr; // now expand all block references in the primary ENTITIES block // XXX this involves heavy memory copying, consider a faster solution for future versions. ExpandBlockReferences(*entities,blocks_by_name); unsigned int cur = 0; for (std::shared_ptr pl : entities->lines) { if (pl->positions.size()) { std::map::iterator it = layers.find(pl->layer); if (it == layers.end()) { ++pScene->mNumMeshes; layers[pl->layer] = cur++; std::vector< const DXF::PolyLine* > pv; pv.push_back(&*pl); corr.push_back(pv); } else { corr[(*it).second].push_back(&*pl); } } } if ( 0 == pScene->mNumMeshes) { throw DeadlyImportError("DXF: this file contains no 3d data"); } pScene->mMeshes = new aiMesh*[ pScene->mNumMeshes ] (); for(const LayerMap::value_type& elem : layers){ aiMesh* const mesh = pScene->mMeshes[elem.second] = new aiMesh(); mesh->mName.Set(elem.first); unsigned int cvert = 0,cface = 0; for(const DXF::PolyLine* pl : corr[elem.second]){ // sum over all faces since we need to 'verbosify' them. cvert += std::accumulate(pl->counts.begin(),pl->counts.end(),0); cface += static_cast(pl->counts.size()); } aiVector3D* verts = mesh->mVertices = new aiVector3D[cvert]; aiColor4D* colors = mesh->mColors[0] = new aiColor4D[cvert]; aiFace* faces = mesh->mFaces = new aiFace[cface]; mesh->mNumVertices = cvert; mesh->mNumFaces = cface; unsigned int prims = 0; unsigned int overall_indices = 0; for(const DXF::PolyLine* pl : corr[elem.second]){ std::vector::const_iterator it = pl->indices.begin(); for(unsigned int facenumv : pl->counts) { aiFace& face = *faces++; face.mIndices = new unsigned int[face.mNumIndices = facenumv]; for (unsigned int i = 0; i < facenumv; ++i) { face.mIndices[i] = overall_indices++; ai_assert(pl->positions.size() == pl->colors.size()); if (*it >= pl->positions.size()) { throw DeadlyImportError("DXF: vertex index out of bounds"); } *verts++ = pl->positions[*it]; *colors++ = pl->colors[*it++]; } // set primitive flags now, this saves the extra pass in ScenePreprocessor. switch(face.mNumIndices) { case 1: prims |= aiPrimitiveType_POINT; break; case 2: prims |= aiPrimitiveType_LINE; break; case 3: prims |= aiPrimitiveType_TRIANGLE; break; default: prims |= aiPrimitiveType_POLYGON; break; } } } mesh->mPrimitiveTypes = prims; mesh->mMaterialIndex = 0; } GenerateHierarchy(pScene,output); GenerateMaterials(pScene,output); } // ------------------------------------------------------------------------------------------------ void DXFImporter::ExpandBlockReferences(DXF::Block& bl,const DXF::BlockMap& blocks_by_name) { for (const DXF::InsertBlock& insert : bl.insertions) { // first check if the referenced blocks exists ... const DXF::BlockMap::const_iterator it = blocks_by_name.find(insert.name); if (it == blocks_by_name.end()) { ASSIMP_LOG_ERROR("DXF: Failed to resolve block reference: ", insert.name,"; skipping" ); continue; } // XXX this would be the place to implement recursive expansion if needed. const DXF::Block& bl_src = *(*it).second; const size_t size = bl_src.lines.size(); // the size may increase in the loop for (size_t i = 0; i < size; ++i) { std::shared_ptr pl_in = bl_src.lines[i]; if (!pl_in) { ASSIMP_LOG_ERROR("DXF: PolyLine instance is nullptr, skipping."); continue; } std::shared_ptr pl_out = std::shared_ptr(new DXF::PolyLine(*pl_in)); if (bl_src.base.Length() || insert.scale.x!=1.f || insert.scale.y!=1.f || insert.scale.z!=1.f || insert.angle || insert.pos.Length()) { // manual coordinate system transformation // XXX order aiMatrix4x4 trafo, tmp; aiMatrix4x4::Translation(-bl_src.base,trafo); //Need to translate position before scaling the insert //otherwise the position ends up being the position*scaling //STH 2024.01.17 trafo *= aiMatrix4x4::Translation(insert.pos,tmp); trafo *= aiMatrix4x4::Scaling(insert.scale,tmp); //trafo *= aiMatrix4x4::Translation(insert.pos,tmp); // XXX rotation currently ignored - I didn't find an appropriate sample model. if (insert.angle != 0.f) { ASSIMP_LOG_WARN("DXF: BLOCK rotation not currently implemented"); } for (aiVector3D& v : pl_out->positions) { v *= trafo; } } bl.lines.push_back(pl_out); } } } // ------------------------------------------------------------------------------------------------ void DXFImporter::GenerateMaterials(aiScene* pScene, DXF::FileData& /*output*/) { // generate an almost-white default material. Reason: // the default vertex color is GREY, so we are // already at Assimp's usual default color. // generate a default material aiMaterial* pcMat = new aiMaterial(); aiString s; s.Set(AI_DEFAULT_MATERIAL_NAME); pcMat->AddProperty(&s, AI_MATKEY_NAME); aiColor4D clrDiffuse(0.9f,0.9f,0.9f,1.0f); pcMat->AddProperty(&clrDiffuse,1,AI_MATKEY_COLOR_DIFFUSE); clrDiffuse = aiColor4D(1.0f,1.0f,1.0f,1.0f); pcMat->AddProperty(&clrDiffuse,1,AI_MATKEY_COLOR_SPECULAR); clrDiffuse = aiColor4D(0.05f,0.05f,0.05f,1.0f); pcMat->AddProperty(&clrDiffuse,1,AI_MATKEY_COLOR_AMBIENT); pScene->mNumMaterials = 1; pScene->mMaterials = new aiMaterial*[1]; pScene->mMaterials[0] = pcMat; } // ------------------------------------------------------------------------------------------------ void DXFImporter::GenerateHierarchy(aiScene* pScene, DXF::FileData& /*output*/) { // generate the output scene graph, which is just the root node with a single child for each layer. pScene->mRootNode = new aiNode(); pScene->mRootNode->mName.Set(""); if (1 == pScene->mNumMeshes) { pScene->mRootNode->mMeshes = new unsigned int[ pScene->mRootNode->mNumMeshes = 1 ]; pScene->mRootNode->mMeshes[0] = 0; } else { pScene->mRootNode->mChildren = new aiNode*[ pScene->mRootNode->mNumChildren = pScene->mNumMeshes ]; for (unsigned int m = 0; m < pScene->mRootNode->mNumChildren;++m) { aiNode* p = pScene->mRootNode->mChildren[m] = new aiNode(); p->mName = pScene->mMeshes[m]->mName; p->mMeshes = new unsigned int[p->mNumMeshes = 1]; p->mMeshes[0] = m; p->mParent = pScene->mRootNode; } } } // ------------------------------------------------------------------------------------------------ void DXFImporter::SkipSection(DXF::LineReader& reader) { for( ;!reader.End() && !reader.Is(0,"ENDSEC"); reader++); } // ------------------------------------------------------------------------------------------------ void DXFImporter::ParseHeader(DXF::LineReader& reader, DXF::FileData& ) { for( ;!reader.End() && !reader.Is(0,"ENDSEC"); reader++); } // ------------------------------------------------------------------------------------------------ void DXFImporter::ParseBlocks(DXF::LineReader& reader, DXF::FileData& output) { while( !reader.End() && !reader.Is(0,"ENDSEC")) { if (reader.Is(0,"BLOCK")) { ParseBlock(++reader,output); continue; } ++reader; } ASSIMP_LOG_VERBOSE_DEBUG("DXF: got ", output.blocks.size()," entries in BLOCKS" ); } // ------------------------------------------------------------------------------------------------ void DXFImporter::ParseBlock(DXF::LineReader& reader, DXF::FileData& output) { // push a new block onto the stack. output.blocks.emplace_back(); DXF::Block& block = output.blocks.back(); while( !reader.End() && !reader.Is(0,"ENDBLK")) { switch(reader.GroupCode()) { case GroupCode_Name: block.name = reader.Value(); break; case GroupCode_XComp: block.base.x = reader.ValueAsFloat(); break; case GroupCode_YComp: block.base.y = reader.ValueAsFloat(); break; case GroupCode_ZComp: block.base.z = reader.ValueAsFloat(); break; } if (reader.Is(0,"POLYLINE")) { ParsePolyLine(++reader,output); continue; } // XXX is this a valid case? if (reader.Is(0,"INSERT")) { ASSIMP_LOG_WARN("DXF: INSERT within a BLOCK not currently supported; skipping"); for( ;!reader.End() && !reader.Is(0,"ENDBLK"); ++reader); break; } else if (reader.Is(0,"3DFACE") || reader.Is(0,"LINE") || reader.Is(0,"3DLINE")) { //http://sourceforge.net/tracker/index.php?func=detail&aid=2970566&group_id=226462&atid=1067632 Parse3DFace(++reader, output); continue; } ++reader; } } // ------------------------------------------------------------------------------------------------ void DXFImporter::ParseEntities(DXF::LineReader& reader, DXF::FileData& output) { // Push a new block onto the stack. output.blocks.emplace_back(); DXF::Block& block = output.blocks.back(); block.name = AI_DXF_ENTITIES_MAGIC_BLOCK; while( !reader.End() && !reader.Is(0,"ENDSEC")) { if (reader.Is(0,"POLYLINE")) { ParsePolyLine(++reader,output); continue; } else if (reader.Is(0,"INSERT")) { ParseInsertion(++reader,output); continue; } else if (reader.Is(0,"3DFACE") || reader.Is(0,"LINE") || reader.Is(0,"3DLINE")) { //http://sourceforge.net/tracker/index.php?func=detail&aid=2970566&group_id=226462&atid=1067632 Parse3DFace(++reader, output); continue; } ++reader; } ASSIMP_LOG_VERBOSE_DEBUG( "DXF: got ", block.lines.size()," polylines and ", block.insertions.size(), " inserted blocks in ENTITIES" ); } void DXFImporter::ParseInsertion(DXF::LineReader& reader, DXF::FileData& output) { output.blocks.back().insertions.emplace_back(); DXF::InsertBlock& bl = output.blocks.back().insertions.back(); while( !reader.End() && !reader.Is(0)) { switch(reader.GroupCode()) { // name of referenced block case GroupCode_Name: bl.name = reader.Value(); break; // translation case GroupCode_XComp: bl.pos.x = reader.ValueAsFloat(); break; case GroupCode_YComp: bl.pos.y = reader.ValueAsFloat(); break; case GroupCode_ZComp: bl.pos.z = reader.ValueAsFloat(); break; // scaling case 41: bl.scale.x = reader.ValueAsFloat(); break; case 42: bl.scale.y = reader.ValueAsFloat(); break; case 43: bl.scale.z = reader.ValueAsFloat(); break; // rotation angle case 50: bl.angle = reader.ValueAsFloat(); break; } reader++; } } static constexpr unsigned int DXF_POLYLINE_FLAG_CLOSED = 0x1; // Currently unused //static constexpr unsigned int DXF_POLYLINE_FLAG_3D_POLYLINE = 0x8; //static constexpr unsigned int DXF_POLYLINE_FLAG_3D_POLYMESH = 0x10; static constexpr unsigned int DXF_POLYLINE_FLAG_POLYFACEMESH = 0x40; // ------------------------------------------------------------------------------------------------ void DXFImporter::ParsePolyLine(DXF::LineReader& reader, DXF::FileData& output) { output.blocks.back().lines.push_back( std::shared_ptr( new DXF::PolyLine() ) ); DXF::PolyLine& line = *output.blocks.back().lines.back(); unsigned int iguess = 0, vguess = 0; while( !reader.End() && !reader.Is(0,"ENDSEC")) { if (reader.Is(0,"VERTEX")) { ParsePolyLineVertex(++reader,line); if (reader.Is(0,"SEQEND")) { break; } continue; } switch(reader.GroupCode()) { // flags --- important that we know whether it is a // polyface mesh or 'just' a line. case 70: if (!line.flags) { line.flags = reader.ValueAsSignedInt(); } break; // optional number of vertices case 71: vguess = reader.ValueAsSignedInt(); line.positions.reserve(vguess); break; // optional number of faces case 72: iguess = reader.ValueAsSignedInt(); line.indices.reserve(iguess); break; // 8 specifies the layer on which this line is placed on case 8: line.layer = reader.Value(); break; } reader++; } if (vguess && line.positions.size() != vguess) { ASSIMP_LOG_WARN("DXF: unexpected vertex count in polymesh: ", line.positions.size(),", expected ", vguess ); } if (line.flags & DXF_POLYLINE_FLAG_POLYFACEMESH ) { if (line.positions.size() < 3 || line.indices.size() < 3) { ASSIMP_LOG_WARN("DXF: not enough vertices for polymesh; ignoring"); output.blocks.back().lines.pop_back(); return; } // if these numbers are wrong, parsing might have gone wild. // however, the docs state that applications are not required // to set the 71 and 72 fields, respectively, to valid values. // So just fire a warning. if (iguess && line.counts.size() != iguess) { ASSIMP_LOG_WARN( "DXF: unexpected face count in polymesh: ", line.counts.size(),", expected ", iguess ); } } else if (!line.indices.size() && !line.counts.size()) { // a poly-line - so there are no indices yet. size_t guess = line.positions.size() + (line.flags & DXF_POLYLINE_FLAG_CLOSED ? 1 : 0); line.indices.reserve(guess); line.counts.reserve(guess/2); for (unsigned int i = 0; i < line.positions.size()/2; ++i) { line.indices.push_back(i*2); line.indices.push_back(i*2+1); line.counts.push_back(2); } // closed polyline? if (line.flags & DXF_POLYLINE_FLAG_CLOSED) { line.indices.push_back(static_cast(line.positions.size()-1)); line.indices.push_back(0); line.counts.push_back(2); } } } #define DXF_VERTEX_FLAG_PART_OF_POLYFACE 0x80 #define DXF_VERTEX_FLAG_HAS_POSITIONS 0x40 // ------------------------------------------------------------------------------------------------ void DXFImporter::ParsePolyLineVertex(DXF::LineReader& reader, DXF::PolyLine& line) { unsigned int cnti = 0, flags = 0; unsigned int indices[4]; aiVector3D out; aiColor4D clr = AI_DXF_DEFAULT_COLOR; while( !reader.End() ) { if (reader.Is(0)) { // SEQEND or another VERTEX break; } switch (reader.GroupCode()) { case 8: // layer to which the vertex belongs to - assume that // this is always the layer the top-level poly-line // entity resides on as well. if(reader.Value() != line.layer) { ASSIMP_LOG_WARN("DXF: expected vertex to be part of a poly-face but the 0x128 flag isn't set"); } break; case 70: flags = reader.ValueAsUnsignedInt(); break; // VERTEX COORDINATES case GroupCode_XComp: out.x = reader.ValueAsFloat(); break; case GroupCode_YComp: out.y = reader.ValueAsFloat(); break; case GroupCode_ZComp: out.z = reader.ValueAsFloat(); break; // POLYFACE vertex indices case 71: case 72: case 73: case 74: { if (cnti == 4) { ASSIMP_LOG_WARN("DXF: more than 4 indices per face not supported; ignoring"); break; } const int index = reader.ValueAsSignedInt(); if (index >= 0) { indices[cnti++] = static_cast(index); } else { indices[cnti++] = static_cast(-index); } } break; // color case 62: clr = g_aclrDxfIndexColors[reader.ValueAsUnsignedInt() % AI_DXF_NUM_INDEX_COLORS]; break; }; reader++; } if (line.flags & DXF_POLYLINE_FLAG_POLYFACEMESH && !(flags & DXF_VERTEX_FLAG_PART_OF_POLYFACE)) { ASSIMP_LOG_WARN("DXF: expected vertex to be part of a polyface but the 0x128 flag isn't set"); } if (cnti) { line.counts.push_back(cnti); for (unsigned int i = 0; i < cnti; ++i) { // IMPORTANT NOTE: POLYMESH indices are ONE-BASED if (indices[i] == 0) { ASSIMP_LOG_WARN("DXF: invalid vertex index, indices are one-based."); --line.counts.back(); // Workaround to fix issue 2229 if (line.counts.back() == 0) { line.counts.pop_back(); } continue; } line.indices.push_back(indices[i]-1); } } else { line.positions.push_back(out); line.colors.push_back(clr); } } // ------------------------------------------------------------------------------------------------ void DXFImporter::Parse3DFace(DXF::LineReader& reader, DXF::FileData& output) { // (note) this is also used for for parsing line entities, so we // must handle the vertex_count == 2 case as well. output.blocks.back().lines.push_back( std::shared_ptr( new DXF::PolyLine() ) ); DXF::PolyLine& line = *output.blocks.back().lines.back(); aiVector3D vip[4]; aiColor4D clr = AI_DXF_DEFAULT_COLOR; bool b[4] = {false,false,false,false}; while( !reader.End() ) { // next entity with a groupcode == 0 is probably already the next vertex or polymesh entity if (reader.GroupCode() == 0) { break; } switch (reader.GroupCode()) { // 8 specifies the layer case 8: line.layer = reader.Value(); break; // x position of the first corner case 10: vip[0].x = reader.ValueAsFloat(); b[2] = true; break; // y position of the first corner case 20: vip[0].y = reader.ValueAsFloat(); b[2] = true; break; // z position of the first corner case 30: vip[0].z = reader.ValueAsFloat(); b[2] = true; break; // x position of the second corner case 11: vip[1].x = reader.ValueAsFloat(); b[3] = true; break; // y position of the second corner case 21: vip[1].y = reader.ValueAsFloat(); b[3] = true; break; // z position of the second corner case 31: vip[1].z = reader.ValueAsFloat(); b[3] = true; break; // x position of the third corner case 12: vip[2].x = reader.ValueAsFloat(); b[0] = true; break; // y position of the third corner case 22: vip[2].y = reader.ValueAsFloat(); b[0] = true; break; // z position of the third corner case 32: vip[2].z = reader.ValueAsFloat(); b[0] = true; break; // x position of the fourth corner case 13: vip[3].x = reader.ValueAsFloat(); b[1] = true; break; // y position of the fourth corner case 23: vip[3].y = reader.ValueAsFloat(); b[1] = true; break; // z position of the fourth corner case 33: vip[3].z = reader.ValueAsFloat(); b[1] = true; break; // color case 62: clr = g_aclrDxfIndexColors[reader.ValueAsUnsignedInt() % AI_DXF_NUM_INDEX_COLORS]; break; }; ++reader; } // the fourth corner may even be identical to the third, // in this case we treat it as if it didn't exist. if (vip[3] == vip[2]) { b[1] = false; } // sanity checks to see if we got something meaningful if ((b[1] && !b[0]) || !b[2] || !b[3]) { ASSIMP_LOG_WARN("DXF: unexpected vertex setup in 3DFACE/LINE/FACE entity; ignoring"); output.blocks.back().lines.pop_back(); return; } const unsigned int cnt = (2+(b[0]?1:0)+(b[1]?1:0)); line.counts.push_back(cnt); for (unsigned int i = 0; i < cnt; ++i) { line.indices.push_back(static_cast(line.positions.size())); line.positions.push_back(vip[i]); line.colors.push_back(clr); } } #endif // !! ASSIMP_BUILD_NO_DXF_IMPORTER