forked from bartvdbraak/blender
Apply [#26383] Triangle fans support for COLLADA importer
Submitted by Alexey Zakharov This patch adds support to Blender for reading geometry data that's represented as triangle fans.
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eaeb8004f4
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@ -165,7 +165,7 @@ void UVDataWrapper::getUV(int uv_index[2], float *uv)
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}
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break;
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case COLLADAFW::MeshVertexData::DATA_TYPE_UNKNOWN:
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case COLLADAFW::MeshVertexData::DATA_TYPE_UNKNOWN:
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default:
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fprintf(stderr, "MeshImporter.getUV(): unknown data type\n");
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}
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@ -278,7 +278,7 @@ void MeshImporter::print_index_list(COLLADAFW::IndexList& index_list)
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}
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#endif
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bool MeshImporter::is_nice_mesh(COLLADAFW::Mesh *mesh)
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bool MeshImporter::is_nice_mesh(COLLADAFW::Mesh *mesh) // checks if mesh has supported primitive types: polylist, triangles, triangle_fans
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{
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COLLADAFW::MeshPrimitiveArray& prim_arr = mesh->getMeshPrimitives();
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@ -307,7 +307,7 @@ bool MeshImporter::is_nice_mesh(COLLADAFW::Mesh *mesh)
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}
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}
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else if(type != COLLADAFW::MeshPrimitive::TRIANGLES) {
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else if(type != COLLADAFW::MeshPrimitive::TRIANGLES && type!= COLLADAFW::MeshPrimitive::TRIANGLE_FANS) {
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fprintf(stderr, "Primitive type %s is not supported.\n", type_str);
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return false;
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}
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@ -426,7 +426,7 @@ int MeshImporter::count_new_tris(COLLADAFW::Mesh *mesh, Mesh *me)
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}
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// TODO: import uv set names
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void MeshImporter::read_faces(COLLADAFW::Mesh *mesh, Mesh *me, int new_tris)
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void MeshImporter::read_faces(COLLADAFW::Mesh *mesh, Mesh *me, int new_tris) //TODO:: Refactor. Possibly replace by iterators
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{
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unsigned int i;
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@ -478,6 +478,12 @@ void MeshImporter::read_faces(COLLADAFW::Mesh *mesh, Mesh *me, int new_tris)
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size_t prim_totface = mp->getFaceCount();
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unsigned int *indices = mp->getPositionIndices().getData();
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unsigned int *nind = mp->getNormalIndices().getData();
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if (has_normals && mp->getPositionIndices().getCount() != mp->getNormalIndices().getCount()) {
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fprintf(stderr, "Warning: Number of normals is different from the number of vertcies, skipping normals\n");
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has_normals = false;
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}
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unsigned int j, k;
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int type = mp->getPrimitiveType();
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int index = 0;
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@ -532,6 +538,43 @@ void MeshImporter::read_faces(COLLADAFW::Mesh *mesh, Mesh *me, int new_tris)
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prim.totface++;
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}
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}
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// If MeshPrimitive is TRIANGLE_FANS we split it into triangles
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// The first trifan vertex will be the first vertex in every triangle
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if (type == COLLADAFW::MeshPrimitive::TRIANGLE_FANS) {
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unsigned grouped_vertex_count = mp->getGroupedVertexElementsCount();
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for (unsigned int group_index = 0; group_index < grouped_vertex_count; group_index++){
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unsigned int first_vertex = indices[0]; // Store first trifan vertex
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unsigned int first_normal = nind[0]; // Store first trifan vertex normal
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unsigned int vertex_count = mp->getGroupedVerticesVertexCount(group_index);
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for (unsigned int vertex_index = 0; vertex_index < vertex_count - 2; vertex_index++){
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// For each triangle store indeces of its 3 vertices
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unsigned int triangle_vertex_indices[3]={first_vertex, indices[1], indices[2]};
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set_face_indices(mface, triangle_vertex_indices, false);
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test_index_face(mface, &me->fdata, face_index, 3);
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if (has_normals) { // vertex normals, same inplementation as for the triangles
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// the same for vertces normals
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unsigned int vertex_normal_indices[3]={first_normal, nind[1], nind[2]};
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if (!flat_face(vertex_normal_indices, nor, 3))
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mface->flag |= ME_SMOOTH;
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nind++;
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}
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mface++; // same inplementation as for the triangles
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indices++;
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face_index++;
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prim.totface++;
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}
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// Moving cursor to the next triangle fan.
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if (has_normals)
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nind += 2;
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indices += 2;
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}
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}
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else if (type == COLLADAFW::MeshPrimitive::POLYLIST || type == COLLADAFW::MeshPrimitive::POLYGONS) {
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COLLADAFW::Polygons *mpvc = (COLLADAFW::Polygons*)mp;
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COLLADAFW::Polygons::VertexCountArray& vcounta = mpvc->getGroupedVerticesVertexCountArray();
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