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Bugfix #12835

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Zbuffer error in render: when you render faces clipped by 'clip end' the
z values could wrap around, resulting in errors. Code not nicely clamps,
plus should be faster even!
This commit is contained in:
Ton Roosendaal 2008-09-22 12:18:07 +00:00
parent 6e3bdacc11
commit 2009ef810e
1 changed files with 26 additions and 16 deletions
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42
source/blender/render/intern/source/zbuf.c
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@ -377,6 +377,8 @@ static void zbuffillAc4(ZSpan *zspan, int obi, int zvlnr, float *v1, float *v2,
if(sn1<0) sn1= 0;
if(sn2>=sn1) {
int intzverg;
zverg= (double)sn1*zxd + zy0;
rz= rectzofs+sn1;
rm= rectmaskofs+sn1;
@ -386,22 +388,21 @@ static void zbuffillAc4(ZSpan *zspan, int obi, int zvlnr, float *v1, float *v2,
zverg-= zspan->polygon_offset;
while(x>=0) {
if( (int)zverg < *rz) {
if(!zspan->rectmask || (int)zverg > *rm) {
// int i= zvlnr & 3;
intzverg= (int)CLAMPIS(zverg, INT_MIN, INT_MAX);
if( intzverg < *rz) {
if(!zspan->rectmask || intzverg > *rm) {
apn= ap;
while(apn) {
if(apn->p[0]==0) {apn->obi[0]= obi; apn->p[0]= zvlnr; apn->z[0]= zverg; apn->mask[0]= mask; break; }
if(apn->p[0]==0) {apn->obi[0]= obi; apn->p[0]= zvlnr; apn->z[0]= intzverg; apn->mask[0]= mask; break; }
if(apn->p[0]==zvlnr && apn->obi[0]==obi) {apn->mask[0]|= mask; break; }
if(apn->p[1]==0) {apn->obi[1]= obi; apn->p[1]= zvlnr; apn->z[1]= zverg; apn->mask[1]= mask; break; }
if(apn->p[1]==0) {apn->obi[1]= obi; apn->p[1]= zvlnr; apn->z[1]= intzverg; apn->mask[1]= mask; break; }
if(apn->p[1]==zvlnr && apn->obi[1]==obi) {apn->mask[1]|= mask; break; }
if(apn->p[2]==0) {apn->obi[2]= obi; apn->p[2]= zvlnr; apn->z[2]= zverg; apn->mask[2]= mask; break; }
if(apn->p[2]==0) {apn->obi[2]= obi; apn->p[2]= zvlnr; apn->z[2]= intzverg; apn->mask[2]= mask; break; }
if(apn->p[2]==zvlnr && apn->obi[2]==obi) {apn->mask[2]|= mask; break; }
if(apn->p[3]==0) {apn->obi[3]= obi; apn->p[3]= zvlnr; apn->z[3]= zverg; apn->mask[3]= mask; break; }
if(apn->p[3]==0) {apn->obi[3]= obi; apn->p[3]= zvlnr; apn->z[3]= intzverg; apn->mask[3]= mask; break; }
if(apn->p[3]==zvlnr && apn->obi[3]==obi) {apn->mask[3]|= mask; break; }
// if(apn->p[i]==0) {apn->obi[i]= obi; apn->p[i]= zvlnr; apn->z[i]= zverg; apn->mask[i]= mask; break; }
// if(apn->p[i]==zvlnr && apn->obi[i]==obi) {apn->mask[i]|= mask; break; }
if(apn->next==NULL) apn->next= addpsA(zspan);
apn= apn->next;
}
@ -1115,6 +1116,8 @@ static void zbuffillGLinv4(ZSpan *zspan, int obi, int zvlnr, float *v1, float *v
if(sn1<0) sn1= 0;
if(sn2>=sn1) {
int intzverg;
zverg= (double)sn1*zxd + zy0;
rz= rectzofs+sn1;
rp= rectpofs+sn1;
@ -1123,10 +1126,12 @@ static void zbuffillGLinv4(ZSpan *zspan, int obi, int zvlnr, float *v1, float *v
x= sn2-sn1;
while(x>=0) {
if( (int)zverg > *rz || *rz==0x7FFFFFFF) {
if(!zspan->rectmask || (int)zverg > *rm) {
intzverg= (int)CLAMPIS(zverg, INT_MIN, INT_MAX);
if( intzverg > *rz || *rz==0x7FFFFFFF) {
if(!zspan->rectmask || intzverg > *rm) {
*ro= obi;
*rz= (int)zverg;
*rz= intzverg;
*rp= zvlnr;
}
}
@ -1231,6 +1236,8 @@ static void zbuffillGL4(ZSpan *zspan, int obi, int zvlnr, float *v1, float *v2,
if(sn1<0) sn1= 0;
if(sn2>=sn1) {
int intzverg;
zverg= (double)sn1*zxd + zy0;
rz= rectzofs+sn1;
rp= rectpofs+sn1;
@ -1239,9 +1246,11 @@ static void zbuffillGL4(ZSpan *zspan, int obi, int zvlnr, float *v1, float *v2,
x= sn2-sn1;
while(x>=0) {
if((int)zverg < *rz) {
if(!zspan->rectmask || (int)zverg > *rm) {
*rz= (int)zverg;
intzverg= (int)CLAMPIS(zverg, INT_MIN, INT_MAX);
if(intzverg < *rz) {
if(!zspan->rectmask || intzverg > *rm) {
*rz= intzverg;
*rp= zvlnr;
*ro= obi;
}
@ -1359,7 +1368,8 @@ static void zbuffillGL_onlyZ(ZSpan *zspan, int obi, int zvlnr, float *v1, float
x= sn2-sn1;
while(x>=0) {
int zvergi= (int)zverg;
int zvergi= (int)CLAMPIS(zverg, INT_MIN, INT_MAX);
/* option: maintain two depth values, closest and 2nd closest */
if(zvergi < *rz) {
if(rectzofs1) *rz1= *rz;