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Improved patch approximations around non-manifold features

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- use regular corner patches around non-manifold verts that were sharpened
This commit is contained in:
barfowl 2015-09-22 17:26:09 -07:00
parent f744e20c4b
commit 0aea00a2e8
1 changed files with 25 additions and 1 deletions
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26
opensubdiv/far/patchTableFactory.cpp
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@ -898,7 +898,10 @@ PatchTableFactory::identifyAdaptivePatches(AdaptiveContext & context) {
}
// Identify boundaries for both regular and xordinary patches -- non-manifold
// edges and vertices are interpreted as boundaries for regular patches
// (infinitely sharp) edges and vertices are currently interpreted as boundaries
// for regular patches, though an irregular patch or extrapolated boundary patch
// is really necessary in future for some non-manifold cases.
//
if (hasBoundaryVertex or hasNonManifoldVertex) {
Vtr::ConstIndexArray fEdges = level->getFaceEdges(faceIndex);
@ -911,6 +914,27 @@ PatchTableFactory::identifyAdaptivePatches(AdaptiveContext & context) {
((level->getEdgeTag(fEdges[1])._nonManifold) << 1) |
((level->getEdgeTag(fEdges[2])._nonManifold) << 2) |
((level->getEdgeTag(fEdges[3])._nonManifold) << 3);
// Other than non-manifold edges, non-manifold vertices that were made
// sharp should also trigger new "boundary" edges for the sharp corner
// patches introduced in these cases.
//
if (level->getVertexTag(fVerts[0])._nonManifold &&
level->getVertexTag(fVerts[0])._infSharp) {
nonManEdgeMask |= (1 << 0) | (1 << 3);
}
if (level->getVertexTag(fVerts[1])._nonManifold &&
level->getVertexTag(fVerts[1])._infSharp) {
nonManEdgeMask |= (1 << 1) | (1 << 0);
}
if (level->getVertexTag(fVerts[2])._nonManifold &&
level->getVertexTag(fVerts[2])._infSharp) {
nonManEdgeMask |= (1 << 2) | (1 << 1);
}
if (level->getVertexTag(fVerts[3])._nonManifold &&
level->getVertexTag(fVerts[3])._infSharp) {
nonManEdgeMask |= (1 << 3) | (1 << 2);
}
boundaryEdgeMask |= nonManEdgeMask;
}