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use ease interpolation for dilate/erode feather option, looks smoother

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This commit is contained in:
Campbell Barton 2012-06-16 15:15:05 +00:00
parent 6fc277c410
commit 392b3a78e2
1 changed files with 6 additions and 1 deletions
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7
source/blender/compositor/operations/COM_BlurBaseOperation.cpp
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@ -89,7 +89,8 @@ float *BlurBaseOperation::make_gausstab(int rad)
return gausstab;
}
/* normalized distance from the current (inverted so 1.0 is close and 0.0 is far) */
/* normalized distance from the current (inverted so 1.0 is close and 0.0 is far)
* 'ease' is applied after, looks nicer */
float *BlurBaseOperation::make_dist_fac_inverse(int rad)
{
float *dist_fac_invert, val;
@ -101,6 +102,10 @@ float *BlurBaseOperation::make_dist_fac_inverse(int rad)
for (i = -rad; i <= rad; i++) {
val = 1.0f - fabsf(((float)i / (float)rad));
/* ease - gives less hard lines for dilate/erode feather */
val = (3.0f * val * val - 2.0f * val * val * val);
dist_fac_invert[i + rad] = val;
}