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Store bit-depth for reuse, replace loop with shift

This commit is contained in:
Campbell Barton 2015-04-29 05:30:30 +10:00
parent d2ac3abbc2
commit e0ae693924
1 changed files with 14 additions and 8 deletions
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22
source/blender/editors/screen/glutil.c
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@ -1008,16 +1008,22 @@ void bglPolygonOffset(float UNUSED(viewdist), float dist)
/* dist is from camera to center point */
if (winmat[15] > 0.5f) {
int depthbits, i, depthmax = 1;
glGetIntegerv(GL_DEPTH_BITS, &depthbits);
for (i = 1; i < depthbits; i++) {
depthmax = (depthmax << 1) + 1;
#if 0
offs = 0.00001f * dist * viewdist; // ortho tweaking
#else
static float depth_fac = 0.0f;
if (depth_fac == 0.0f) {
int depthbits;
glGetIntegerv(GL_DEPTH_BITS, &depthbits);
depth_fac = 1.0f / (float)(depthbits - 1);
}
offs = (-1.0 / winmat[10]) * dist / (double) depthmax;
//offs = 0.00001f * dist * viewdist; // ortho tweaking
offs = (-1.0 / winmat[10]) * dist * depth_fac;
#endif
}
else {
/* should be clipping value or so... */
offs = 0.0001f * dist;
}
else offs = 0.0001f * dist; // should be clipping value or so...
winmat[14] -= offs;
offset += offs;