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Fix for subsurf oscillations along creased boundary edges

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Changed the "exterior edge interior shift" section of subsurf calc to
always treat boundary edges the same, regardless of sharpness. We
should revisit subsurf creasing to see if more consistent and
predictable results are possible, but for now this a non-intrusive way
to avoid wavyness along the boundary.

Fixes bug [#31864] Artifacts when using Subsurf+Crease on plane
http://projects.blender.org/tracker/index.php?func=detail&aid=31864&group_id=9&atid=498
This commit is contained in:
Nicholas Bishop 2012-06-18 20:50:35 +00:00
parent fd36fb8f63
commit c9e98e848d
1 changed files with 5 additions and 1 deletions
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6
source/blender/blenkernel/intern/CCGSubSurf.c
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@ -1914,14 +1914,18 @@ static void ccgSubSurf__calcSubdivLevel(CCGSubSurf *ss,
avgSharpness = 0;
}
if (_edge_isBoundary(e) && (!e->numFaces || sharpCount < 2)) {
if (_edge_isBoundary(e)) {
for (x = 1; x < edgeSize - 1; x++) {
int fx = x * 2;
const float *co = EDGE_getCo(e, curLvl, x);
float *nCo = EDGE_getCo(e, nextLvl, fx);
/* Average previous level's endpoints */
VertDataCopy(r, EDGE_getCo(e, curLvl, x - 1), ss);
VertDataAdd(r, EDGE_getCo(e, curLvl, x + 1), ss);
VertDataMulN(r, 0.5f, ss);
/* nCo = nCo * 0.75 + r * 0.25 */
VertDataCopy(nCo, co, ss);
VertDataMulN(nCo, 0.75f, ss);
VertDataMulN(r, 0.25f, ss);