1 | //////////////////////////////////////////////////////////////////////////////// |
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2 | // blendshape.cpp |
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3 | // Author : Francesco Giordana |
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4 | // Start Date : January 13, 2005 |
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5 | // Copyright : (C) 2006 by Francesco Giordana |
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6 | // Email : fra.giordana@tiscali.it |
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7 | //////////////////////////////////////////////////////////////////////////////// |
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8 | |
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9 | /********************************************************************************* |
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10 | * * |
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11 | * This program is free software; you can redistribute it and/or modify * |
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12 | * it under the terms of the GNU Lesser General Public License as published by * |
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13 | * the Free Software Foundation; either version 2 of the License, or * |
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14 | * (at your option) any later version. * |
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15 | * * |
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16 | **********************************************************************************/ |
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17 | |
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18 | #include "blendshape.h" |
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19 | #include "submesh.h" |
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20 | |
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21 | namespace OgreMayaExporter |
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22 | { |
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23 | // Constructor |
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24 | BlendShape::BlendShape() |
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25 | { |
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26 | m_pBlendShapeFn = NULL; |
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27 | clear(); |
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28 | } |
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29 | |
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30 | // Destructor |
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31 | BlendShape::~BlendShape() |
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32 | { |
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33 | clear(); |
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34 | } |
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35 | |
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36 | // Clear blend shape data |
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37 | void BlendShape::clear() |
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38 | { |
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39 | if (m_pBlendShapeFn) |
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40 | delete m_pBlendShapeFn; |
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41 | m_pBlendShapeFn = NULL; |
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42 | m_origEnvelope = 0; |
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43 | m_origWeights.clear(); |
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44 | m_poses.clear(); |
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45 | m_target = T_MESH; |
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46 | m_index = 0; |
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47 | } |
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48 | |
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49 | // Load blend shape deformer from Maya |
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50 | MStatus BlendShape::load(MObject &blendShapeObj) |
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51 | { |
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52 | // Create a Fn for relative Maya blend shape deformer |
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53 | m_pBlendShapeFn = new MFnBlendShapeDeformer(blendShapeObj); |
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54 | // Save original envelope value for the deformer |
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55 | m_origEnvelope = m_pBlendShapeFn->envelope(); |
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56 | // Save original target weights |
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57 | m_origWeights.clear(); |
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58 | MIntArray indexList; |
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59 | m_pBlendShapeFn->weightIndexList(indexList); |
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60 | int i; |
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61 | for (i=0; i<indexList.length(); i++) |
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62 | { |
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63 | m_origWeights.push_back(m_pBlendShapeFn->weight(indexList[i])); |
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64 | } |
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65 | return MS::kSuccess; |
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66 | } |
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67 | |
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68 | // Load blend shape poses |
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69 | MStatus BlendShape::loadPoses(MDagPath& meshDag,ParamList ¶ms, |
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70 | std::vector<vertex> &vertices,long numVertices,long offset,long targetIndex) |
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71 | { |
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72 | MStatus stat; |
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73 | int i,j; |
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74 | // Set blend shape target |
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75 | if (params.useSharedGeom) |
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76 | m_target = T_MESH; |
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77 | else |
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78 | m_target = T_SUBMESH; |
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79 | m_index = targetIndex; |
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80 | // Set blend shape deformer envelope to 1 to get target shapes |
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81 | m_pBlendShapeFn->setEnvelope(1); |
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82 | // Set weight to 0 for all targets |
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83 | MIntArray indexList; |
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84 | m_pBlendShapeFn->weightIndexList(indexList); |
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85 | for (i=0; i<indexList.length(); i++) |
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86 | { |
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87 | m_pBlendShapeFn->setWeight(indexList[i],0); |
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88 | } |
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89 | // Get pose names |
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90 | MStringArray poseNames; |
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91 | MString cmd = "aliasAttr -q " + m_pBlendShapeFn->name(); |
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92 | MGlobal::executeCommand(cmd,poseNames,false,false); |
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93 | // Get all poses: set iteratively weight to 1 for current target shape and keep 0 for the other targets |
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94 | for (i=0; i<indexList.length(); i++) |
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95 | { |
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96 | MString poseName = "pose" + i; |
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97 | // get pose name |
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98 | bool foundName = false; |
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99 | for (j=1; j<poseNames.length() && !foundName; j+=2) |
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100 | { |
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101 | int idx = -1; |
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102 | sscanf(poseNames[j].asChar(),"weight[%d]",&idx); |
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103 | if (idx == i) |
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104 | { |
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105 | poseName = poseNames[j-1]; |
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106 | foundName = true; |
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107 | std::cout << "pose num: " << i << " name: " << poseName.asChar() << "\n"; |
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108 | std::cout.flush(); |
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109 | } |
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110 | } |
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111 | // set weight to 1 |
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112 | m_pBlendShapeFn->setWeight(indexList[i],1); |
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113 | // load the pose |
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114 | stat = loadPose(meshDag,params,vertices,numVertices,offset,poseName); |
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115 | if (stat != MS::kSuccess) |
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116 | { |
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117 | std::cout << "Failed loading target pose " << indexList[i] << "\n"; |
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118 | std::cout.flush(); |
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119 | } |
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120 | // set weight to 0 |
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121 | m_pBlendShapeFn->setWeight(indexList[i],0); |
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122 | } |
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123 | // Set blend shape envelope to 0 |
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124 | m_pBlendShapeFn->setEnvelope(0); |
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125 | // Restore targets weights |
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126 | for (i=0; i<indexList.length(); i++) |
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127 | { |
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128 | m_pBlendShapeFn->setWeight(indexList[i],m_origWeights[i]); |
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129 | } |
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130 | return MS::kSuccess; |
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131 | } |
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132 | |
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133 | // Load a single blend shape pose |
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134 | MStatus BlendShape::loadPose(MDagPath& meshDag,ParamList ¶ms, |
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135 | std::vector<vertex> &vertices,long numVertices,long offset,MString poseName) |
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136 | { |
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137 | int i; |
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138 | // get the mesh Fn |
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139 | MFnMesh mesh(meshDag); |
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140 | // create a new pose |
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141 | pose p; |
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142 | p.poseTarget = m_target; |
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143 | p.index = m_index; |
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144 | p.name = poseName.asChar(); |
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145 | // get vertex positions |
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146 | MFloatPointArray points; |
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147 | if (params.exportWorldCoords) |
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148 | mesh.getPoints(points,MSpace::kWorld); |
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149 | else |
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150 | mesh.getPoints(points,MSpace::kObject); |
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151 | // calculate vertex offsets |
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152 | for (i=0; i<numVertices; i++) |
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153 | { |
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154 | vertexOffset vo; |
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155 | vertex v = vertices[offset+i]; |
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156 | vo.x = points[v.index].x * params.lum - v.x; |
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157 | vo.y = points[v.index].y * params.lum - v.y; |
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158 | vo.z = points[v.index].z * params.lum - v.z; |
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159 | vo.index = offset+i; |
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160 | if (fabs(vo.x) < PRECISION) |
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161 | vo.x = 0; |
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162 | if (fabs(vo.y) < PRECISION) |
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163 | vo.y = 0; |
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164 | if (fabs(vo.z) < PRECISION) |
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165 | vo.z = 0; |
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166 | if ((vo.x!=0) || (vo.y!=0) || (vo.z!=0)) |
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167 | p.offsets.push_back(vo); |
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168 | } |
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169 | // add pose to pose list |
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170 | if (p.offsets.size() > 0) |
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171 | m_poses.push_back(p); |
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172 | if (params.bsBB) |
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173 | { |
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174 | // update bounding boxes of loaded submeshes |
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175 | for (i=0; i<params.loadedSubmeshes.size(); i++) |
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176 | { |
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177 | MFnMesh mesh(params.loadedSubmeshes[i]->m_dagPath); |
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178 | MPoint min = mesh.boundingBox().min(); |
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179 | MPoint max = mesh.boundingBox().max(); |
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180 | MBoundingBox bbox(min,max); |
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181 | if (params.exportWorldCoords) |
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182 | bbox.transformUsing(params.loadedSubmeshes[i]->m_dagPath.inclusiveMatrix()); |
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183 | min = bbox.min() * params.lum; |
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184 | max = bbox.max() * params.lum; |
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185 | MBoundingBox newbbox(min,max); |
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186 | params.loadedSubmeshes[i]->m_boundingBox.expand(newbbox); |
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187 | } |
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188 | } |
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189 | // pose loaded succesfully |
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190 | return MS::kSuccess; |
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191 | } |
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192 | |
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193 | // Load a blend shape animation track |
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194 | Track BlendShape::loadTrack(float start,float stop,float rate,ParamList& params,int startPoseId) |
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195 | { |
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196 | MStatus stat; |
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197 | int i; |
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198 | MString msg; |
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199 | std::vector<float> times; |
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200 | // Create a track for current clip |
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201 | Track t; |
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202 | t.m_type = TT_POSE; |
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203 | t.m_target = m_target; |
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204 | t.m_index = m_index; |
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205 | t.m_vertexKeyframes.clear(); |
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206 | // Calculate times from clip sample rate |
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207 | times.clear(); |
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208 | if (rate <= 0) |
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209 | { |
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210 | std::cout << "invalid sample rate for the clip (must be >0), we skip it\n"; |
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211 | std::cout.flush(); |
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212 | return t; |
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213 | } |
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214 | float time; |
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215 | for (time=start; time<stop; time+=rate) |
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216 | times.push_back(time); |
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217 | times.push_back(stop); |
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218 | // Get animation length |
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219 | float length=0; |
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220 | if (times.size() >= 0) |
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221 | length = times[times.size()-1] - times[0]; |
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222 | if (length < 0) |
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223 | { |
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224 | std::cout << "invalid time range for the clip, we skip it\n"; |
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225 | std::cout.flush(); |
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226 | return t; |
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227 | } |
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228 | // Evaluate animation curves at selected times |
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229 | for (i=0; i<times.size(); i++) |
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230 | { |
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231 | // Set time to wanted sample time |
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232 | MAnimControl::setCurrentTime(MTime(times[i],MTime::kSeconds)); |
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233 | // Load a keyframe at current time |
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234 | vertexKeyframe key = loadKeyframe(times[i]-times[0],params,startPoseId); |
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235 | // Add keyframe to joint track |
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236 | t.addVertexKeyframe(key); |
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237 | } |
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238 | // Clip successfully loaded |
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239 | return t; |
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240 | } |
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241 | |
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242 | |
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243 | // Load a blend shape animation keyframe |
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244 | vertexKeyframe BlendShape::loadKeyframe(float time,ParamList& params,int startPoseId) |
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245 | { |
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246 | int i; |
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247 | // Create keyframe |
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248 | vertexKeyframe key; |
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249 | key.time = time; |
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250 | key.poserefs.clear(); |
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251 | // Read weights of all poses at current time |
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252 | // Get blend shape deformer envelope |
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253 | float envelope = m_pBlendShapeFn->envelope(); |
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254 | // Get weights of all targets |
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255 | MIntArray indexList; |
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256 | m_pBlendShapeFn->weightIndexList(indexList); |
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257 | for (i=0; i<indexList.length(); i++) |
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258 | { |
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259 | // Create a pose reference |
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260 | // Index of pose is relative to current blend shape |
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261 | vertexPoseRef poseref; |
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262 | poseref.poseIndex = startPoseId + i; |
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263 | poseref.poseWeight = envelope * m_pBlendShapeFn->weight(indexList[i]); |
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264 | key.poserefs.push_back(poseref); |
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265 | } |
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266 | return key; |
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267 | } |
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268 | |
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269 | // Get blend shape deformer name |
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270 | MString BlendShape::getName() |
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271 | { |
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272 | return m_pBlendShapeFn->name(); |
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273 | } |
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274 | |
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275 | // Get blend shape poses |
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276 | std::vector<pose>& BlendShape::getPoses() |
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277 | { |
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278 | return m_poses; |
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279 | } |
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280 | |
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281 | // Set maya blend shape deformer envelope |
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282 | void BlendShape::setEnvelope(float envelope) |
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283 | { |
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284 | m_pBlendShapeFn->setEnvelope(envelope); |
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285 | } |
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286 | // Restore maya blend shape deformer original envelope |
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287 | void BlendShape::restoreEnvelope() |
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288 | { |
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289 | m_pBlendShapeFn->setEnvelope(m_origEnvelope); |
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290 | } |
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291 | } // end namespace |
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