/*
* R_AddSurfaceToDrawList
*
* Note that dlit may be true even if dlightBits is 0, indicating there's at least potentially one
* dynamically light surface for the drawSurf.
*/
static void R_AddSurfaceToDrawList( const entity_t *e, const msurface_t *surf, const mfog_t *fog,
unsigned int dlightBits, unsigned shadowBits, float dist )
{
shader_t *shader;
drawSurfaceBSP_t *drawSurf = surf->drawSurf;
portalSurface_t *portalSurface = NULL;
bool lightmapped;
unsigned drawOrder;
if( r_drawworld->integer == 2 ) {
shader = rsh.envShader;
} else {
shader = surf->shader;
if( shader->flags & SHADER_SKY ) {
bool addSurf = true, addSlice = false;
if( R_FASTSKY() ) {
return;
}
if( R_ClipSkySurface( surf ) ) {
if( rn.refdef.rdflags & RDF_SKYPORTALINVIEW ) {
// for skyportals, generate portal surface and
// also add BSP surface to skybox if it's fogged to render
// the fog hull later
portalSurface = R_AddSkyportalSurface( e, shader, drawSurf );
addSurf = portalSurface != NULL && surf->fog != NULL;
addSlice = portalSurface != NULL;
}
if( addSurf ) {
addSlice = R_AddSkySurfToDrawList( surf, portalSurface );
}
if( addSlice ) {
R_AddSurfaceVBOSlice( surf, 0 );
}
}
rn.numVisSurfaces++;
return;
}
}
lightmapped = surf->superLightStyle != NULL && surf->superLightStyle->lightmapNum[0] >= 0;
drawOrder = R_PackOpaqueOrder( e, shader, lightmapped, dlightBits != 0 );
if( drawSurf->visFrame != rf.frameCount ) {
if( shader->flags & SHADER_PORTAL ) {
// draw portals in front-to-back order
dist = 1024 - dist / 100.0f;
if( dist < 1 ) dist = 1;
portalSurface = R_AddPortalSurface( e, surf->mesh, surf->mins, surf->maxs, shader, drawSurf );
}
else {
// just ignore the distance since we're drawing batched geometry anyway
dist = 0;
}
drawSurf->visFrame = rf.frameCount;
drawSurf->listSurf = R_AddSurfToDrawList( rn.meshlist, e, fog, shader, dist, drawOrder, portalSurface, drawSurf );
if( !drawSurf->listSurf ) {
return;
}
if( portalSurface && !( shader->flags & (SHADER_PORTAL_CAPTURE|SHADER_PORTAL_CAPTURE2) ) ) {
R_AddSurfToDrawList( rn.portalmasklist, e, NULL, rsh.skyShader, 0, 0, NULL, drawSurf );
}
}
else {
if( !drawSurf->listSurf ) {
return;
}
// update (OR) the dlightbit
R_UpdateDrawListSurf( drawSurf->listSurf, drawOrder );
}
// keep track of the actual vbo chunk we need to render
R_AddSurfaceVBOSlice( surf, 0 );
// dynamic lights that affect the surface
if( dlightBits ) {
// ignore dlights that have already been marked as affectors
if( drawSurf->dlightFrame == rsc.frameCount ) {
drawSurf->dlightBits |= dlightBits;
} else {
drawSurf->dlightBits = dlightBits;
drawSurf->dlightFrame = rsc.frameCount;
}
}
// shadows that are projected onto the surface
if( shadowBits ) {
R_AddSurfaceVBOSlice( surf, rsh.worldBrushModel->numDrawSurfaces );
// ignore shadows that have already been marked as affectors
if( drawSurf->shadowFrame == rsc.frameCount ) {
drawSurf->shadowBits |= shadowBits;
} else {
drawSurf->shadowBits = shadowBits;
drawSurf->shadowFrame = rsc.frameCount;
}
}
rf.stats.c_brush_polys++;
rn.numVisSurfaces++;
}
/*
* R_ClipSkySurface
*/
static void R_ClipSkySurface(int nump, vec3_t vecs, int stage) {
const float *norm;
float *v;
boolean_t front, back;
float d, e;
float dists[MAX_CLIP_VERTS];
int sides[MAX_CLIP_VERTS];
vec3_t newv[2][MAX_CLIP_VERTS];
int newc[2];
int i, j;
if (nump > MAX_CLIP_VERTS - 2)
Com_Error(ERR_DROP, "R_ClipSkyPoly: MAX_CLIP_VERTS");
if (stage == 6) { // fully clipped, so draw it
R_DrawSkySurface(nump, vecs);
return;
}
front = back = false;
norm = skyclip[stage];
for (i = 0, v = vecs; i < nump; i++, v += 3) {
d = DotProduct(v, norm);
if (d > ON_EPSILON) {
front = true;
sides[i] = SIDE_FRONT;
} else if (d < -ON_EPSILON) {
back = true;
sides[i] = SIDE_BACK;
} else
sides[i] = SIDE_BOTH;
dists[i] = d;
}
if (!front || !back) { // not clipped
R_ClipSkySurface(nump, vecs, stage + 1);
return;
}
// clip it
sides[i] = sides[0];
dists[i] = dists[0];
VectorCopy(vecs, (vecs + (i * 3)));
newc[0] = newc[1] = 0;
for (i = 0, v = vecs; i < nump; i++, v += 3) {
switch (sides[i]) {
case SIDE_FRONT:
VectorCopy(v, newv[0][newc[0]]);
newc[0]++;
break;
case SIDE_BACK:
VectorCopy(v, newv[1][newc[1]]);
newc[1]++;
break;
case SIDE_BOTH:
VectorCopy(v, newv[0][newc[0]]);
newc[0]++;
VectorCopy(v, newv[1][newc[1]]);
newc[1]++;
break;
}
if (sides[i] == SIDE_BOTH || sides[i + 1] == SIDE_BOTH || sides[i + 1]
== sides[i])
continue;
d = dists[i] / (dists[i] - dists[i + 1]);
for (j = 0; j < 3; j++) {
e = v[j] + d * (v[j + 3] - v[j]);
newv[0][newc[0]][j] = e;
newv[1][newc[1]][j] = e;
}
newc[0]++;
newc[1]++;
}
// continue
R_ClipSkySurface(newc[0], newv[0][0], stage + 1);
R_ClipSkySurface(newc[1], newv[1][0], stage + 1);
}