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1 /*
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2 Open Asset Import Library (assimp)
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3 ----------------------------------------------------------------------
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4
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5 Copyright (c) 2006-2012, assimp team
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6 All rights reserved.
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7
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8 Redistribution and use of this software in source and binary forms,
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9 with or without modification, are permitted provided that the
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10 following conditions are met:
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11
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12 * Redistributions of source code must retain the above
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13 copyright notice, this list of conditions and the
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14 following disclaimer.
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15
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16 * Redistributions in binary form must reproduce the above
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17 copyright notice, this list of conditions and the
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18 following disclaimer in the documentation and/or other
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19 materials provided with the distribution.
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20
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21 * Neither the name of the assimp team, nor the names of its
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22 contributors may be used to endorse or promote products
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23 derived from this software without specific prior
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24 written permission of the assimp team.
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25
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26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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27 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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28 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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29 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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30 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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31 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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32 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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33 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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34 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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35 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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36 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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37
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38 ----------------------------------------------------------------------
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39 */
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40
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41 /** @file Defines the helper data structures for importing 3DS files.
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42 http://www.jalix.org/ressources/graphics/3DS/_unofficials/3ds-unofficial.txt */
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43
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44 #ifndef AI_SMOOTHINGGROUPS_H_INC
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45 #define AI_SMOOTHINGGROUPS_H_INC
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46
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47 // ---------------------------------------------------------------------------
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48 /** Helper structure representing a face with smoothing groups assigned */
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49 struct FaceWithSmoothingGroup
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50 {
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51 FaceWithSmoothingGroup() : iSmoothGroup(0)
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52 {
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53 // let the rest uninitialized for performance - in release builds.
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54 // in debug builds set all indices to a common magic value
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55 #ifdef _DEBUG
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56 this->mIndices[0] = 0xffffffff;
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57 this->mIndices[1] = 0xffffffff;
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58 this->mIndices[2] = 0xffffffff;
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59 #endif
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60 }
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61
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62
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63 //! Indices. .3ds is using uint16. However, after
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64 //! an unique vrtex set has been generated,
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65 //! individual index values might exceed 2^16
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66 uint32_t mIndices[3];
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67
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68 //! specifies to which smoothing group the face belongs to
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69 uint32_t iSmoothGroup;
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70 };
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71
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72 // ---------------------------------------------------------------------------
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73 /** Helper structure representing a mesh whose faces have smoothing
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74 groups assigned. This allows us to reuse the code for normal computations
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75 from smoothings groups for several loaders (3DS, ASE). All of them
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76 use face structures which inherit from #FaceWithSmoothingGroup,
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77 but as they add extra members and need to be copied by value we
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78 need to use a template here.
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79 */
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80 template <class T>
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81 struct MeshWithSmoothingGroups
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82 {
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83 //! Vertex positions
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84 std::vector<aiVector3D> mPositions;
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85
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86 //! Face lists
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87 std::vector<T> mFaces;
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88
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89 //! List of normal vectors
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90 std::vector<aiVector3D> mNormals;
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91 };
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92
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93 // ---------------------------------------------------------------------------
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94 /** Computes normal vectors for the mesh
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95 */
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96 template <class T>
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97 void ComputeNormalsWithSmoothingsGroups(MeshWithSmoothingGroups<T>& sMesh);
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98
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99
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100 // include implementations
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101 #include "SmoothingGroups.inl"
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102
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103 #endif // !! AI_SMOOTHINGGROUPS_H_INC
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