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The Blender FBX has models that are also meshes.
This commit is contained in:
Andrzej Kapolka
parent
b294f5b13e
commit
871f97bd81
1 changed files with 122 additions and 114 deletions
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@ -522,6 +522,123 @@ void appendModelIDs(const QString& parentID, const QMultiHash<QString, QString>&
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}
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}
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FBXMesh extractMesh(const FBXNode& object) {
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FBXMesh mesh;
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QVector<int> polygonIndices;
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QVector<glm::vec3> normals;
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QVector<int> normalIndices;
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QVector<glm::vec2> texCoords;
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QVector<int> texCoordIndices;
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QVector<int> materials;
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foreach (const FBXNode& data, object.children) {
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if (data.name == "Vertices") {
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mesh.vertices = createVec3Vector(getDoubleVector(data.properties, 0));
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} else if (data.name == "PolygonVertexIndex") {
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polygonIndices = getIntVector(data.properties, 0);
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} else if (data.name == "LayerElementNormal") {
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bool byVertex = false;
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foreach (const FBXNode& subdata, data.children) {
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if (subdata.name == "Normals") {
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normals = createVec3Vector(getDoubleVector(subdata.properties, 0));
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} else if (subdata.name == "NormalsIndex") {
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normalIndices = getIntVector(subdata.properties, 0);
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} else if (subdata.name == "MappingInformationType" &&
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subdata.properties.at(0) == "ByVertice") {
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byVertex = true;
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}
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}
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if (byVertex) {
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mesh.normals = normals;
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}
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} else if (data.name == "LayerElementUV" && data.properties.at(0).toInt() == 0) {
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foreach (const FBXNode& subdata, data.children) {
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if (subdata.name == "UV") {
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texCoords = createVec2Vector(getDoubleVector(subdata.properties, 0));
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} else if (subdata.name == "UVIndex") {
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texCoordIndices = getIntVector(subdata.properties, 0);
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}
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}
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} else if (data.name == "LayerElementMaterial") {
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foreach (const FBXNode& subdata, data.children) {
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if (subdata.name == "Materials") {
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materials = getIntVector(subdata.properties, 0);
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}
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}
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}
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}
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// convert normals from per-index to per-vertex if necessary
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if (mesh.normals.isEmpty()) {
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mesh.normals.resize(mesh.vertices.size());
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if (normalIndices.isEmpty()) {
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for (int i = 0, n = polygonIndices.size(); i < n; i++) {
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int index = polygonIndices.at(i);
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mesh.normals[index < 0 ? (-index - 1) : index] = normals.at(i);
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}
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} else {
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for (int i = 0, n = polygonIndices.size(); i < n; i++) {
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int index = polygonIndices.at(i);
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int normalIndex = normalIndices.at(i);
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if (normalIndex >= 0) {
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mesh.normals[index < 0 ? (-index - 1) : index] = normals.at(normalIndex);
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}
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}
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}
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}
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// same with the tex coords
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if (!texCoordIndices.isEmpty()) {
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mesh.texCoords.resize(mesh.vertices.size());
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for (int i = 0, n = polygonIndices.size(); i < n; i++) {
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int index = polygonIndices.at(i);
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int texCoordIndex = texCoordIndices.at(i);
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if (texCoordIndex >= 0) {
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mesh.texCoords[index < 0 ? (-index - 1) : index] = texCoords.at(texCoordIndex);
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}
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}
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}
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// convert the polygons to quads and triangles
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int polygonIndex = 0;
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for (const int* beginIndex = polygonIndices.constData(), *end = beginIndex + polygonIndices.size();
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beginIndex != end; polygonIndex++) {
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const int* endIndex = beginIndex;
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while (*endIndex++ >= 0);
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int materialIndex = (polygonIndex < materials.size()) ? materials.at(polygonIndex) : 0;
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mesh.parts.resize(max(mesh.parts.size(), materialIndex + 1));
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FBXMeshPart& part = mesh.parts[materialIndex];
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if (endIndex - beginIndex == 4) {
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part.quadIndices.append(*beginIndex++);
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part.quadIndices.append(*beginIndex++);
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part.quadIndices.append(*beginIndex++);
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part.quadIndices.append(-*beginIndex++ - 1);
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} else {
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for (const int* nextIndex = beginIndex + 1;; ) {
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part.triangleIndices.append(*beginIndex);
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part.triangleIndices.append(*nextIndex++);
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if (*nextIndex >= 0) {
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part.triangleIndices.append(*nextIndex);
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} else {
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part.triangleIndices.append(-*nextIndex - 1);
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break;
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}
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}
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beginIndex = endIndex;
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}
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}
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return mesh;
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}
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FBXGeometry extractFBXGeometry(const FBXNode& node, const QVariantHash& mapping) {
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QHash<QString, FBXMesh> meshes;
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QVector<ExtractedBlendshape> blendshapes;
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@ -567,119 +684,7 @@ FBXGeometry extractFBXGeometry(const FBXNode& node, const QVariantHash& mapping)
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foreach (const FBXNode& object, child.children) {
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if (object.name == "Geometry") {
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if (object.properties.at(2) == "Mesh") {
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FBXMesh mesh;
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QVector<int> polygonIndices;
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QVector<glm::vec3> normals;
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QVector<int> normalIndices;
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QVector<glm::vec2> texCoords;
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QVector<int> texCoordIndices;
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QVector<int> materials;
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foreach (const FBXNode& data, object.children) {
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if (data.name == "Vertices") {
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mesh.vertices = createVec3Vector(getDoubleVector(data.properties, 0));
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} else if (data.name == "PolygonVertexIndex") {
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polygonIndices = getIntVector(data.properties, 0);
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} else if (data.name == "LayerElementNormal") {
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bool byVertex = false;
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foreach (const FBXNode& subdata, data.children) {
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if (subdata.name == "Normals") {
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normals = createVec3Vector(getDoubleVector(subdata.properties, 0));
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} else if (subdata.name == "NormalsIndex") {
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normalIndices = getIntVector(subdata.properties, 0);
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} else if (subdata.name == "MappingInformationType" &&
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subdata.properties.at(0) == "ByVertice") {
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byVertex = true;
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}
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}
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if (byVertex) {
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mesh.normals = normals;
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}
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} else if (data.name == "LayerElementUV" && data.properties.at(0).toInt() == 0) {
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foreach (const FBXNode& subdata, data.children) {
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if (subdata.name == "UV") {
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texCoords = createVec2Vector(getDoubleVector(subdata.properties, 0));
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} else if (subdata.name == "UVIndex") {
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texCoordIndices = getIntVector(subdata.properties, 0);
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}
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}
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} else if (data.name == "LayerElementMaterial") {
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foreach (const FBXNode& subdata, data.children) {
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if (subdata.name == "Materials") {
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materials = getIntVector(subdata.properties, 0);
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}
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}
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}
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}
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// convert normals from per-index to per-vertex if necessary
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if (mesh.normals.isEmpty()) {
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mesh.normals.resize(mesh.vertices.size());
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if (normalIndices.isEmpty()) {
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for (int i = 0, n = polygonIndices.size(); i < n; i++) {
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int index = polygonIndices.at(i);
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mesh.normals[index < 0 ? (-index - 1) : index] = normals.at(i);
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}
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} else {
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for (int i = 0, n = polygonIndices.size(); i < n; i++) {
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int index = polygonIndices.at(i);
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int normalIndex = normalIndices.at(i);
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if (normalIndex >= 0) {
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mesh.normals[index < 0 ? (-index - 1) : index] = normals.at(normalIndex);
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}
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}
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}
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}
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// same with the tex coords
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if (!texCoordIndices.isEmpty()) {
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mesh.texCoords.resize(mesh.vertices.size());
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for (int i = 0, n = polygonIndices.size(); i < n; i++) {
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int index = polygonIndices.at(i);
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int texCoordIndex = texCoordIndices.at(i);
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if (texCoordIndex >= 0) {
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mesh.texCoords[index < 0 ? (-index - 1) : index] = texCoords.at(texCoordIndex);
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}
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}
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}
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// convert the polygons to quads and triangles
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int polygonIndex = 0;
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for (const int* beginIndex = polygonIndices.constData(), *end = beginIndex + polygonIndices.size();
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beginIndex != end; polygonIndex++) {
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const int* endIndex = beginIndex;
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while (*endIndex++ >= 0);
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int materialIndex = (polygonIndex < materials.size()) ? materials.at(polygonIndex) : 0;
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mesh.parts.resize(max(mesh.parts.size(), materialIndex + 1));
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FBXMeshPart& part = mesh.parts[materialIndex];
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if (endIndex - beginIndex == 4) {
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part.quadIndices.append(*beginIndex++);
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part.quadIndices.append(*beginIndex++);
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part.quadIndices.append(*beginIndex++);
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part.quadIndices.append(-*beginIndex++ - 1);
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} else {
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for (const int* nextIndex = beginIndex + 1;; ) {
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part.triangleIndices.append(*beginIndex);
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part.triangleIndices.append(*nextIndex++);
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if (*nextIndex >= 0) {
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part.triangleIndices.append(*nextIndex);
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} else {
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part.triangleIndices.append(-*nextIndex - 1);
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break;
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}
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}
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beginIndex = endIndex;
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}
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}
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meshes.insert(object.properties.at(0).toString(), mesh);
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meshes.insert(object.properties.at(0).toString(), extractMesh(object));
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} else { // object.properties.at(2) == "Shape"
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ExtractedBlendshape extracted = { object.properties.at(0).toString() };
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@ -809,6 +814,9 @@ FBXGeometry extractFBXGeometry(const FBXNode& node, const QVariantHash& mapping)
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}
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}
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}
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} else if (subobject.name == "Vertices") {
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// it's a mesh as well as a model
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meshes.insert(object.properties.at(0).toString(), extractMesh(object));
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}
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}
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// see FBX documentation, http://download.autodesk.com/us/fbx/20112/FBX_SDK_HELP/index.html
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@ -986,7 +994,7 @@ FBXGeometry extractFBXGeometry(const FBXNode& node, const QVariantHash& mapping)
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FBXMesh& mesh = it.value();
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// accumulate local transforms
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QString modelID = parentMap.value(it.key());
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QString modelID = models.contains(it.key()) ? it.key() : parentMap.value(it.key());
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mesh.springiness = springs.value(models.value(modelID).name, defaultSpring).toFloat();
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glm::mat4 modelTransform = getGlobalTransform(parentMap, models, modelID);
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