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Fix T49523: very slow normal map tangent computation for rendering in 2.78.

This commit is contained in:
Brecht Van Lommel 2016-10-06 03:09:46 +02:00 committed by Sergey Sharybin
parent e65e5045de
commit 0d1bc587fa
1 changed files with 8 additions and 5 deletions
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13
intern/mikktspace/mikktspace.c
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@ -579,13 +579,16 @@ static void MergeVertsFast(int piTriList_in_and_out[], STmpVert pTmpVert[], cons
{
// make bbox
int c=0, l=0, channel=0;
float fvMin[3] = {INFINITY, INFINITY, INFINITY};
float fvMax[3] = {-INFINITY, -INFINITY, -INFINITY};
float fvMin[3], fvMax[3];
float dx=0, dy=0, dz=0, fSep=0;
for (l=iL_in; l<=iR_in; l++)
for (c=0; c<3; c++)
for (c=0; c<3; c++)
{ fvMin[c]=pTmpVert[iL_in].vert[c]; fvMax[c]=fvMin[c]; }
for (l=(iL_in+1); l<=iR_in; l++) {
for (c=0; c<3; c++) {
if (fvMin[c]>pTmpVert[l].vert[c]) fvMin[c]=pTmpVert[l].vert[c];
else if (fvMax[c]<pTmpVert[l].vert[c]) fvMax[c]=pTmpVert[l].vert[c];
if (fvMax[c]<pTmpVert[l].vert[c]) fvMax[c]=pTmpVert[l].vert[c];
}
}
dx = fvMax[0]-fvMin[0];
dy = fvMax[1]-fvMin[1];