1 | // Copyright (C) 2014-2015 ChaosForge Ltd
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2 | // http://chaosforge.org/
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3 | //
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4 | // This file is part of Nova libraries.
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5 | // For conditions of distribution and use, see copying.txt file in root folder.
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6 |
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7 | #include "nv/formats/assimp_loader.hh"
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8 | #include "nv/stl/unordered_map.hh"
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9 | #include "nv/gfx/mesh_creator.hh"
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10 | #include "nv/lib/assimp.hh"
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11 |
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12 | using namespace nv;
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13 |
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14 | const unsigned MAX_BONES = 64;
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15 |
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16 | struct assimp_plain_vtx
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17 | {
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18 | vec3 position;
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19 | vec3 normal;
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20 | vec2 texcoord;
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21 | vec4 tangent;
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22 |
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23 | assimp_plain_vtx() {}
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24 | assimp_plain_vtx( const vec3& v, const vec2& t, const vec3& n, const vec4& g )
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25 | {
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26 | position = v;
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27 | texcoord = t;
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28 | normal = n;
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29 | tangent = g;
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30 | }
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31 | };
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32 |
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33 | struct assimp_skinned_vtx
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34 | {
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35 | vec3 position;
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36 | vec3 normal;
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37 | vec2 texcoord;
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38 | vec4 tangent;
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39 | ivec4 boneindex;
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40 | vec4 boneweight;
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41 |
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42 | assimp_skinned_vtx() {}
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43 | assimp_skinned_vtx( const vec3& v, const vec2& t, const vec3& n, const vec4& g )
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44 | {
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45 | position = v;
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46 | texcoord = t;
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47 | normal = n;
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48 | tangent = g;
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49 | }
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50 | };
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51 |
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52 | struct assimp_key_p { float time; vec3 translation; };
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53 | struct assimp_key_r { float time; quat rotation; };
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54 | struct assimp_key_s { float time; vec3 scale; };
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55 | struct assimp_key_tr { transform tform; };
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56 |
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57 |
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58 | nv::assimp_loader::assimp_loader( const std::string& a_ext, uint32 a_assimp_flags /*= 0 */ )
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59 | : m_scene( nullptr ), m_mesh_count(0)
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60 | {
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61 | m_ext = a_ext;
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62 | m_assimp_flags = a_assimp_flags;
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63 | if ( m_assimp_flags == 0 )
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64 | {
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65 | m_assimp_flags = (
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66 | aiProcess_CalcTangentSpace |
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67 | aiProcess_GenSmoothNormals |
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68 | aiProcess_JoinIdenticalVertices |
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69 | aiProcess_ImproveCacheLocality |
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70 | aiProcess_LimitBoneWeights |
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71 | aiProcess_RemoveRedundantMaterials |
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72 | aiProcess_SplitLargeMeshes |
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73 | aiProcess_Triangulate |
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74 | aiProcess_GenUVCoords |
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75 | aiProcess_SortByPType |
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76 | aiProcess_FindDegenerates |
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77 | aiProcess_FindInvalidData |
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78 | 0 );
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79 | }
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80 | }
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81 |
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82 |
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83 | bool nv::assimp_loader::load( stream& source )
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84 | {
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85 | load_assimp_library();
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86 | if ( m_scene != nullptr ) aiReleaseImport( reinterpret_cast<const aiScene*>( m_scene ) );
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87 | m_scene = nullptr;
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88 | m_mesh_count = 0;
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89 | NV_LOG_NOTICE( "AssImp loading file..." );
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90 | size_t size = source.size();
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91 | char* data = new char[ size ];
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92 | source.read( data, size, 1 );
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93 | const aiScene* scene = aiImportFileFromMemory( data, size, m_assimp_flags, m_ext.c_str() );
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94 |
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95 | if( !scene)
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96 | {
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97 | NV_LOG_ERROR( aiGetErrorString() );
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98 | return false;
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99 | }
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100 | m_scene = scene;
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101 | m_mesh_count = scene->mNumMeshes;
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102 | NV_LOG_NOTICE( "Loading successfull" );
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103 | return true;
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104 | }
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105 |
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106 | mesh_data* nv::assimp_loader::release_mesh_data( size_t index /*= 0 */ )
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107 | {
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108 | if ( index >= m_mesh_count ) return nullptr;
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109 | mesh_data* result = new mesh_data;
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110 | load_mesh_data( result, index );
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111 | return result;
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112 | }
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113 | void nv::assimp_loader::load_mesh_data( mesh_data* data, size_t index )
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114 | {
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115 | const aiScene* scene = reinterpret_cast<const aiScene*>( m_scene );
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116 | const aiMesh* mesh = scene->mMeshes[ index ];
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117 | data->set_name( mesh->mName.data );
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118 |
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119 | bool skinned = mesh->mNumBones > 0;
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120 | raw_data_channel* channel = nullptr;
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121 | if ( skinned )
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122 | channel = raw_data_channel::create< assimp_skinned_vtx >( mesh->mNumVertices );
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123 | else
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124 | channel = raw_data_channel::create< assimp_plain_vtx >( mesh->mNumVertices );
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125 |
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126 | data->add_channel( channel );
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127 | if ( mesh->mTangents && mesh->mBitangents )
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128 | for (unsigned int i=0; i<mesh->mNumVertices; i++)
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129 | {
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130 | vec3 v = assimp_vec3_cast( mesh->mVertices[ i ] );
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131 | vec3 n = glm::normalize( assimp_vec3_cast( mesh->mNormals[ i ] ) );
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132 | vec3 t = glm::normalize( assimp_vec3_cast( mesh->mTangents[ i ] ) );
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133 | vec3 b = glm::normalize( assimp_vec3_cast( mesh->mBitangents[ i ] ) );
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134 | vec2 s = assimp_st_cast( mesh->mTextureCoords[ 0 ][ i ] );
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135 |
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136 | glm::vec3 t_i = glm::normalize (t - n * glm::dot (n, t));
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137 | float det = (glm::dot (glm::cross (n, t), b));
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138 | det = (det < 0.0f ? -1.0f : 1.0f );
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139 | nv::vec4 vt ( t_i[0], t_i[1], t_i[2], det );
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140 | if ( skinned )
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141 | reinterpret_cast< assimp_skinned_vtx* >(channel->data)[i] = assimp_skinned_vtx( v, s, n, vt );
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142 | else
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143 | reinterpret_cast< assimp_plain_vtx* >(channel->data)[i] = assimp_plain_vtx( v, s, n, vt );
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144 | }
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145 |
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146 | if ( skinned )
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147 | {
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148 | assimp_skinned_vtx* vtx = reinterpret_cast< assimp_skinned_vtx* >( channel->data );
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149 | for (unsigned int m=0; m<mesh->mNumBones; m++)
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150 | {
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151 | aiBone* bone = mesh->mBones[m];
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152 | for (unsigned int w=0; w<bone->mNumWeights; w++)
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153 | {
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154 | assimp_skinned_vtx& v = vtx[ bone->mWeights[w].mVertexId ];
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155 | bool found = false;
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156 | for ( int i = 0 ; i < 4; ++i )
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157 | {
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158 | if ( v.boneweight[i] <= 0.0f )
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159 | {
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160 | v.boneindex[i] = int( m );
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161 | v.boneweight[i] = bone->mWeights[w].mWeight;
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162 | found = true;
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163 | break;
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164 | }
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165 | }
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166 | NV_ASSERT( found, "Too many weights!" );
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167 | }
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168 | }
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169 | }
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170 |
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171 | raw_data_channel* ichannel = raw_data_channel::create_index( USHORT, mesh->mNumFaces * 3 );
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172 | data->add_channel( ichannel );
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173 | uint16* indices = reinterpret_cast<uint16*>( ichannel->data );
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174 | for (unsigned int i=0; i<mesh->mNumFaces; i++)
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175 | {
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176 | const aiFace* face = &mesh->mFaces[i];
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177 | for (unsigned int j=0; j<face->mNumIndices; j++)
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178 | {
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179 | indices[ i*3 + j ] = uint16( face->mIndices[j] );
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180 | }
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181 | }
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182 | }
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183 |
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184 | nv::assimp_loader::~assimp_loader()
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185 | {
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186 | if ( m_scene != nullptr ) aiReleaseImport( reinterpret_cast<const aiScene*>( m_scene ) );
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187 | }
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188 |
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189 | bool nv::assimp_loader::load_bones( size_t index, array_ref< mesh_node_data > bones )
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190 | {
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191 | if ( m_scene == nullptr ) return false;
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192 | const aiScene* scene = reinterpret_cast<const aiScene*>( m_scene );
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193 | const aiMesh* mesh = scene->mMeshes[ index ];
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194 |
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195 | for (unsigned int m=0; m<mesh->mNumBones; m++)
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196 | {
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197 | aiBone* bone = mesh->mBones[m];
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198 | mat4 offset = assimp_mat4_cast( bone->mOffsetMatrix );
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199 | bones[m].name = bone->mName.data;
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200 | bones[m].data = nullptr;
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201 | bones[m].parent_id = -1;
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202 | bones[m].target_id = -1;
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203 | bones[m].transform = offset;
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204 | }
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205 | return true;
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206 | }
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207 |
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208 | void nv::assimp_loader::scene_report() const
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209 | {
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210 | const aiScene* scene = reinterpret_cast<const aiScene*>( m_scene );
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211 | if ( scene == nullptr ) return;
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212 |
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213 | NV_LOG_NOTICE( "------------------------" );
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214 | NV_LOG_NOTICE( "Texture count - ", scene->mNumTextures );
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215 | NV_LOG_NOTICE( "Animation count - ", scene->mNumAnimations );
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216 | NV_LOG_NOTICE( "Material count - ", scene->mNumMaterials );
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217 | NV_LOG_NOTICE( "Meshes count - ", scene->mNumMeshes );
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218 | NV_LOG_NOTICE( "------------------------" );
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219 |
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220 | aiNode* root = scene->mRootNode;
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221 | if (root)
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222 | {
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223 | NV_LOG_NOTICE( "Root node - ", root->mName.data );
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224 | NV_LOG_NOTICE( " meshes - ", root->mNumMeshes );
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225 | NV_LOG_NOTICE( " children - ", root->mNumChildren );
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226 | }
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227 | else
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228 | {
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229 | NV_LOG_NOTICE( "No root node!" );
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230 | }
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231 | NV_LOG_NOTICE( "------------------------" );
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232 |
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233 | if ( scene->mNumMeshes > 0 )
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234 | {
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235 | for ( nv::uint32 mc = 0; mc < scene->mNumMeshes; mc++ )
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236 | {
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237 | aiMesh* mesh = scene->mMeshes[mc];
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238 |
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239 | NV_LOG_NOTICE( "Mesh #", mc, " - ", string_view( static_cast<char*>( mesh->mName.data ) ) );
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240 | NV_LOG_NOTICE( " bones - ", mesh->mNumBones );
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241 | NV_LOG_NOTICE( " uvs - ", mesh->mNumUVComponents[0] );
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242 | NV_LOG_NOTICE( " verts - ", mesh->mNumVertices );
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243 | NV_LOG_NOTICE( " faces - ", mesh->mNumFaces );
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244 |
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245 | // NV_LOG_NOTICE( "Bones:" );
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246 | // for (unsigned int m=0; m<mesh->mNumBones; m++)
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247 | // {
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248 | // aiBone* bone = mesh->mBones[m];
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249 | // NV_LOG_NOTICE( bone->mName.C_Str() );
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250 | // }
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251 | }
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252 | }
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253 | else
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254 | {
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255 | NV_LOG_NOTICE( "No meshes!" );
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256 | }
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257 | NV_LOG_NOTICE( "------------------------" );
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258 |
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259 |
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260 | // if ( scene->mNumMaterials > 0 )
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261 | // {
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262 | // for (unsigned int m=0; m < scene->mNumMaterials; m++)
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263 | // {
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264 | // int texIndex = 0;
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265 | // aiReturn texFound = aiReturn_SUCCESS;
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266 | // aiString path; // filename
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267 | // while (texFound == aiReturn_SUCCESS)
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268 | // {
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269 | // texFound = scene->mMaterials[m]->GetTexture(aiTextureType_DIFFUSE, texIndex, &path);
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270 | // NV_LOG_NOTICE( " material - ", path.data );
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271 | // texIndex++;
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272 | // }
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273 | // }
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274 | // }
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275 | // else
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276 | // {
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277 | // NV_LOG_NOTICE( "No materials" );
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278 | // }
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279 | // NV_LOG_NOTICE( "------------------------" );
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280 |
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281 | }
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282 |
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283 | mesh_nodes_data* nv::assimp_loader::release_merged_bones( mesh_data* meshes )
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284 | {
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285 | const aiScene* scene = reinterpret_cast<const aiScene*>( m_scene );
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286 | vector< mesh_node_data > final_bones;
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287 | unordered_map< std::string, uint16 > names;
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288 | for ( unsigned int m = 0; m < m_mesh_count; ++m )
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289 | {
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290 | uint16 translate[MAX_BONES];
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291 | vector< mesh_node_data > bones;
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292 | const aiMesh* mesh = scene->mMeshes[ m ];
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293 | if ( mesh->mNumBones != 0 )
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294 | {
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295 | bones.resize( mesh->mNumBones );
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296 | load_bones( m, bones );
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297 | for ( unsigned int b = 0; b < mesh->mNumBones; ++b )
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298 | {
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299 |
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300 | mesh_node_data& bone = bones[b];
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301 | auto iname = names.find( bone.name );
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302 | if ( iname == names.end() )
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303 | {
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304 | NV_ASSERT( final_bones.size() < MAX_BONES, "Too many bones to merge!" );
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305 | uint16 index = uint16( final_bones.size() );
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306 | final_bones.push_back( bone );
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307 | names[ bone.name ] = index;
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308 | translate[b] = index;
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309 | }
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310 | else
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311 | {
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312 | translate[b] = iname->second;
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313 | }
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314 | }
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315 | if ( m > 0 && bones.size() > 0 )
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316 | {
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317 | raw_data_channel* channel = meshes[m].get_raw_channels()[0];
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318 | assimp_skinned_vtx* va = reinterpret_cast< assimp_skinned_vtx* >( channel->data );
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319 | for ( unsigned v = 0; v < channel->count; ++v )
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320 | {
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321 | assimp_skinned_vtx& vertex = va[v];
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322 |
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323 | for ( int i = 0 ; i < 4; ++i)
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324 | {
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325 | if ( vertex.boneweight[i] > 0.0f )
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326 | {
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327 | vertex.boneindex[i] = int( translate[vertex.boneindex[i]] );
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328 | }
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329 | }
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330 | }
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331 | }
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332 | }
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333 | }
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334 | mesh_node_data* bones = new mesh_node_data[ final_bones.size() ];
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335 | raw_copy( final_bones.begin(), final_bones.end(), bones );
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336 | return new mesh_nodes_data( "bones", final_bones.size(), bones );
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337 | }
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338 |
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339 | mesh_nodes_data* nv::assimp_loader::release_mesh_nodes_data( size_t index /*= 0*/ )
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340 | {
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341 | if ( m_scene == nullptr ) return nullptr;
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342 | const aiScene* scene = reinterpret_cast<const aiScene*>( m_scene );
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343 | if ( scene->mRootNode == nullptr || scene->mAnimations == nullptr || scene->mAnimations[index] == nullptr) return nullptr;
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344 |
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345 | const aiNode* root = scene->mRootNode;
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346 | const aiAnimation* anim = scene->mAnimations[index];
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347 |
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348 | uint32 count = count_nodes( scene->mRootNode );
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349 | mesh_node_data* data = new mesh_node_data[count];
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350 |
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351 | uint16 frame_rate = static_cast<uint16>( anim->mTicksPerSecond );
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352 | float duration = static_cast<float>( anim->mDuration );
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353 | bool flat = false;
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354 |
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355 | load_node( index, data, root, 0, -1 );
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356 |
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357 | return new mesh_nodes_data( anim->mName.data, count, data, frame_rate, duration, flat );
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358 | }
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359 |
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360 | nv::uint32 nv::assimp_loader::count_nodes( const void* node ) const
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361 | {
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362 | const aiNode* ainode = reinterpret_cast< const aiNode* >( node );
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363 | nv::uint32 count = 1;
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364 | for ( unsigned i = 0; i < ainode->mNumChildren; ++i )
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365 | {
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366 | count += count_nodes( ainode->mChildren[i] );
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367 | }
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368 | return count;
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369 | }
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370 |
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371 | nv::sint16 nv::assimp_loader::load_node( uint32 anim_id, mesh_node_data* nodes, const void* vnode, sint16 this_id, sint16 parent_id )
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372 | {
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373 | const aiScene* scene = reinterpret_cast<const aiScene*>( m_scene );
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374 | const aiNode* node = reinterpret_cast<const aiNode*>( vnode );
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375 | std::string name( node->mName.data );
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376 | const aiAnimation* anim = scene->mAnimations[anim_id];
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377 | const aiNodeAnim* anode = nullptr;
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378 |
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379 | for ( unsigned i = 0 ; i < anim->mNumChannels ; i++ )
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380 | {
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381 | anode = anim->mChannels[i];
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382 | if ( std::string( anode->mNodeName.data ) == name ) break;
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383 | anode = nullptr;
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384 | }
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385 |
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386 | mesh_node_data& a_data = nodes[ this_id ];
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387 |
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388 | a_data.name = name;
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389 | a_data.target_id = -1;
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390 | a_data.parent_id = parent_id;
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391 | // This value is ignored by the create_transformed_keys, but needed by create_direct_keys!
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392 | // TODO: find a common solution!
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393 | // This is bad because create_transformed_keys never uses node-transformations for
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394 | // node's without keys
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395 | a_data.transform = nv::assimp_mat4_cast( node->mTransformation );
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396 | if (this_id == 0)
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397 | a_data.transform = mat4();
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398 | a_data.data = nullptr;
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399 |
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400 | if (anode) create_keys( &a_data, anode );
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401 |
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402 | nv::sint16 next = this_id + 1;
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403 | for ( unsigned i = 0; i < node->mNumChildren; ++i )
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404 | {
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405 | next = load_node( anim_id, nodes, node->mChildren[i], next, this_id );
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406 | }
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407 |
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408 | return next;
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409 | }
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410 |
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411 | void nv::assimp_loader::create_keys( mesh_node_data* data, const void* vnode )
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412 | {
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413 | const aiNodeAnim* node = reinterpret_cast< const aiNodeAnim* >( vnode );
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414 | if ( node->mNumPositionKeys == 0 && node->mNumRotationKeys == 0 && node->mNumScalingKeys == 0 )
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415 | {
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416 | return;
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417 | }
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418 |
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419 | data->data = new key_data;
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420 | raw_data_channel* raw_pchannel = raw_data_channel::create<assimp_key_p>( node->mNumPositionKeys );
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421 | raw_data_channel* raw_rchannel = raw_data_channel::create<assimp_key_r>( node->mNumRotationKeys );
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422 | //raw_data_channel* raw_schannel = raw_data_channel::create<assimp_key_s>( node->mNumScalingKeys );
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423 | data->data->add_channel( raw_pchannel );
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424 | data->data->add_channel( raw_rchannel );
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425 | //data->data->add_channel( raw_schannel );
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426 | assimp_key_p* pchannel = reinterpret_cast< assimp_key_p* >( raw_pchannel->data );
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427 | assimp_key_r* rchannel = reinterpret_cast< assimp_key_r* >( raw_rchannel->data );
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428 | //assimp_key_s* schannel = ((assimp_key_s*)(raw_schannel->data));
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429 |
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430 | for ( unsigned np = 0; np < node->mNumPositionKeys; ++np )
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431 | {
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432 | pchannel[np].time = static_cast<float>( node->mPositionKeys[np].mTime );
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433 | pchannel[np].translation = assimp_vec3_cast(node->mPositionKeys[np].mValue);
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434 | }
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435 | for ( unsigned np = 0; np < node->mNumRotationKeys; ++np )
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436 | {
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437 | rchannel[np].time = static_cast<float>( node->mRotationKeys[np].mTime );
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438 | rchannel[np].rotation = assimp_quat_cast(node->mRotationKeys[np].mValue );
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439 | }
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440 | // if ( node->mNumScalingKeys > 0 )
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441 | // {
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442 | // nv::vec3 scale_vec0 = assimp_vec3_cast( node->mScalingKeys[0].mValue );
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443 | // float scale_value = glm::length( glm::abs( scale_vec0 - nv::vec3(1,1,1) ) );
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444 | // if ( node->mNumScalingKeys > 1 || scale_value > 0.001 )
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445 | // {
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446 | // NV_LOG( nv::LOG_WARNING, "scale key significant!" );
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447 | // for ( unsigned np = 0; np < node->mNumRotationKeys; ++np )
|
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448 | // {
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449 | // schannel[np].time = (float)node->mScalingKeys[np].mTime;
|
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450 | // schannel[np].scale = assimp_vec3_cast(node->mScalingKeys[np].mValue);
|
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451 | // }
|
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452 | // }
|
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453 | // else
|
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454 | // {
|
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455 | // schannel[0].time = (float)node->mScalingKeys[0].mTime;
|
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456 | // schannel[0].scale = assimp_vec3_cast(node->mScalingKeys[0].mValue);
|
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457 | // }
|
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458 | // }
|
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459 |
|
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460 | }
|
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461 |
|
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462 | mesh_data_pack* nv::assimp_loader::release_mesh_data_pack()
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463 | {
|
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464 | if ( m_scene == nullptr || m_mesh_count == 0 ) return nullptr;
|
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465 | const aiScene* scene = reinterpret_cast<const aiScene*>( m_scene );
|
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466 | bool has_bones = false;
|
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467 | mesh_data* meshes = new mesh_data[ m_mesh_count ];
|
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468 | for ( size_t m = 0; m < m_mesh_count; ++m )
|
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469 | {
|
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470 | const aiMesh* mesh = scene->mMeshes[ m ];
|
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471 | meshes[m].set_name( mesh->mName.data );
|
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472 | if ( mesh->mNumBones > 0 ) has_bones = true;
|
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473 | load_mesh_data(&meshes[m],m);
|
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474 | }
|
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475 |
|
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476 | mesh_nodes_data* nodes = ( has_bones ? release_merged_bones( meshes ) : release_mesh_nodes_data(0) );
|
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477 | return new mesh_data_pack( m_mesh_count, meshes, nodes );
|
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478 | }
|
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479 |
|
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480 | nv::size_t nv::assimp_loader::get_nodes_data_count() const
|
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481 | {
|
---|
482 | if ( m_scene == nullptr ) return 0;
|
---|
483 | const aiScene* scene = reinterpret_cast<const aiScene*>( m_scene );
|
---|
484 | return scene->mNumAnimations;
|
---|
485 | }
|
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486 |
|
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487 |
|
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