static void vol_trace_behind(ShadeInput *shi, VlakRen *vlr, const float co[3], float col_r[4])
{
Isect isect;
copy_v3_v3(isect.start, co);
copy_v3_v3(isect.dir, shi->view);
isect.dist = FLT_MAX;
isect.mode = RE_RAY_MIRROR;
isect.check = RE_CHECK_VLR_NONE;
isect.skip = RE_SKIP_VLR_NEIGHBOUR;
isect.orig.ob = (void *) shi->obi;
isect.orig.face = (void *)vlr;
isect.last_hit = NULL;
isect.lay = -1;
/* check to see if there's anything behind the volume, otherwise shade the sky */
if (RE_rayobject_raycast(R.raytree, &isect)) {
shade_intersection(shi, col_r, &isect);
}
else {
shadeSkyView(col_r, co, shi->view, NULL, shi->thread);
shadeSunView(col_r, shi->view);
}
}
/*
* Stuff the sky color into the collector.
*/
void shadeSkyPixel(float collector[4], float fx, float fy, short thread)
{
float view[3], dxyview[2];
/*
* The rules for sky:
* 1. Draw an image, if a background image was provided. Stop
* 2. get texture and color blend, and combine these.
*/
float fac;
if ((R.wrld.skytype & (WO_SKYBLEND+WO_SKYTEX))==0) {
/* 1. solid color */
copy_v3_v3(collector, &R.wrld.horr);
collector[3] = 0.0f;
}
else {
/* 2. */
/* This one true because of the context of this routine */
if (R.wrld.skytype & WO_SKYPAPER) {
view[0]= -1.0f + 2.0f*(fx/(float)R.winx);
view[1]= -1.0f + 2.0f*(fy/(float)R.winy);
view[2]= 0.0;
dxyview[0]= 1.0f/(float)R.winx;
dxyview[1]= 1.0f/(float)R.winy;
}
else {
calc_view_vector(view, fx, fy);
fac= normalize_v3(view);
if (R.wrld.skytype & WO_SKYTEX) {
dxyview[0]= -R.viewdx/fac;
dxyview[1]= -R.viewdy/fac;
}
}
/* get sky color in the collector */
shadeSkyView(collector, NULL, view, dxyview, thread);
collector[3] = 0.0f;
}
calc_view_vector(view, fx, fy);
shadeSunView(collector, view);
}
static void vol_trace_behind(ShadeInput *shi, VlakRen *vlr, float *co, float *col)
{
Isect isect;
VECCOPY(isect.start, co);
VECCOPY(isect.vec, shi->view);
isect.labda = FLT_MAX;
isect.mode= RE_RAY_MIRROR;
isect.skip = RE_SKIP_VLR_NEIGHBOUR | RE_SKIP_VLR_RENDER_CHECK;
isect.orig.ob = (void*) shi->obi;
isect.orig.face = (void*)vlr;
isect.last_hit = NULL;
isect.lay= -1;
/* check to see if there's anything behind the volume, otherwise shade the sky */
if(RE_rayobject_raycast(R.raytree, &isect)) {
shade_intersection(shi, col, &isect);
} else {
shadeSkyView(col, co, shi->view, NULL, shi->thread);
shadeSunView(col, shi->view);
}
}
