forked from bartvdbraak/blender
OpenSubdiv: Fixes for crease in non-manifold meshes
Basically non-manifold edges are expected to be sharp by OpenSubdiv. There\s still some work required, see the inlined comment.
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@ -266,11 +266,39 @@ inline bool TopologyRefinerFactory<OpenSubdiv_Converter>::assignComponentTags(
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TopologyRefiner& refiner,
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const OpenSubdiv_Converter& conv)
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{
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typedef OpenSubdiv::Sdc::Crease Crease;
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int num_edges = conv.get_num_edges(&conv);
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for (int edge = 0; edge < num_edges; ++edge) {
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float sharpness = conv.get_edge_sharpness(&conv, edge);
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float sharpness;
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ConstIndexArray edge_faces = getBaseEdgeFaces(refiner, edge);
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if (edge_faces.size() == 2) {
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sharpness = conv.get_edge_sharpness(&conv, edge);
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}
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else {
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/* Non-manifold edges must be sharp. */
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sharpness = Crease::SHARPNESS_INFINITE;
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}
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sharpness = Crease::SHARPNESS_INFINITE;
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setBaseEdgeSharpness(refiner, edge, sharpness);
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}
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#if 0
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/* Non-manifold vertices can't be always smooth.
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* I.e. when there's loose edge adjacent to the vertex
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* opensubdiv expects vertices to be sharp. But this needs
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* some further investigation.
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*/
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int num_vert = conv.get_num_verts(&conv);
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for (int vert = 0; vert < num_vert; ++vert) {
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IndexArray vert_faces = getBaseVertexFaces(refiner, vert),
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vert_edges = getBaseVertexEdges(refiner, vert);
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if (vert_faces.size() != vert_edges.size()) {
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setBaseVertexSharpness(refiner, vert, Crease::SHARPNESS_INFINITE);
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}
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}
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#endif
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return true;
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}
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@ -308,13 +336,15 @@ OpenSubdiv::Sdc::SchemeType get_capi_scheme_type(OpenSubdiv_SchemeType type)
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struct OpenSubdiv_TopologyRefinerDescr *openSubdiv_createTopologyRefinerDescr(
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OpenSubdiv_Converter *converter)
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{
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typedef OpenSubdiv::Sdc::Options Options;
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using OpenSubdiv::Far::TopologyRefinerFactory;
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OpenSubdiv::Sdc::SchemeType scheme_type =
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get_capi_scheme_type(converter->get_type(converter));
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OpenSubdiv::Sdc::Options options;
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options.SetVtxBoundaryInterpolation(OpenSubdiv::Sdc::Options::VTX_BOUNDARY_EDGE_ONLY);
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options.SetCreasingMethod(OpenSubdiv::Sdc::Options::CREASE_UNIFORM);
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options.SetFVarLinearInterpolation(OpenSubdiv::Sdc::Options::FVAR_LINEAR_ALL);
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Options options;
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options.SetVtxBoundaryInterpolation(Options::VTX_BOUNDARY_EDGE_ONLY);
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options.SetCreasingMethod(Options::CREASE_UNIFORM);
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options.SetFVarLinearInterpolation(Options::FVAR_LINEAR_ALL);
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TopologyRefinerFactory<OpenSubdiv_Converter>::Options
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topology_options(scheme_type, options);
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