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Small tweak in clipping code for irregular shadow buffers

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Ton Roosendaal
2007-01-24 16:10:37 +00:00
parent 06826d27d4
commit 18fc6ca762
1 changed files with 6 additions and 10 deletions
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16
source/blender/render/intern/source/shadbuf.c
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@@ -1530,22 +1530,18 @@ static int viewpixel_to_lampbuf(ShadBuf *shb, VlakRen *vlr, float x, float y, fl
/* clip We can test for -1.0/1.0 because of the properties of the
* coordinate transformations. */
if(hoco[0]<-hoco[3] || hoco[0]>hoco[3])
fac= fabs(hoco[3]);
if(hoco[0]<-fac || hoco[0]>fac)
return 0;
if(hoco[1]<-hoco[3] || hoco[1]>hoco[3])
if(hoco[1]<-fac || hoco[1]>fac)
return 0;
if(hoco[2]<-fac || hoco[2]>fac)
return 0;
siz= 0.5f*(float)shb->size;
co[0]= siz*(1.0f+hoco[0]/hoco[3]) -0.5f;
co[1]= siz*(1.0f+hoco[1]/hoco[3]) -0.5f;
/* Clip for z: clipsta and clipend clip values of the shadow buffer */
fac= (hoco[2]/hoco[3]);
if(fac >= 1.0f || fac <= -1.0f)
return 0;
else
co[2]= ((float)0x7FFFFFFF)*fac;
co[2]= ((float)0x7FFFFFFF)*(hoco[2]/hoco[3]);
/* XXXX bias, much less than normal shadbuf, or do we need a constant? */
co[2] -= 0.05f*shb->bias;