static inline void GL_AddGenericFace( mface_t *face ) {
if( face->drawflags & SURF_SKY ) {
R_AddSkySurface( face );
return;
}
if( face->drawflags & (SURF_TRANS33|SURF_TRANS66) ) {
GL_AddAlphaFace( face );
return;
}
GL_AddSolidFace( face );
}
/*
* @brief
*/
void R_DrawSkyBox(void) {
const int32_t sky_order[6] = { 0, 2, 1, 3, 4, 5 };
r_bsp_surfaces_t *surfs;
uint32_t i, j;
surfs = &r_model_state.world->bsp->sorted_surfaces->sky;
j = 0;
// first add all visible sky surfaces to the sky bounds
for (i = 0; i < surfs->count; i++) {
if (surfs->surfaces[i]->frame == r_locals.frame) {
R_AddSkySurface(surfs->surfaces[i]);
j++;
}
}
if (!j) // no visible sky surfaces
return;
R_ResetArrayState();
glPushMatrix();
glTranslatef(r_view.origin[0], r_view.origin[1], r_view.origin[2]);
if (r_state.fog_enabled)
glFogf(GL_FOG_END, FOG_END * 8);
r_sky.texcoord_index = r_sky.vert_index = 0;
for (i = 0; i < 6; i++) {
if (r_sky.st_mins[0][i] >= r_sky.st_maxs[0][i] || r_sky.st_mins[1][i]
>= r_sky.st_maxs[1][i])
continue; // nothing on this plane
R_BindTexture(r_sky.images[sky_order[i]]->texnum);
R_MakeSkyVec(r_sky.st_mins[0][i], r_sky.st_mins[1][i], i);
R_MakeSkyVec(r_sky.st_mins[0][i], r_sky.st_maxs[1][i], i);
R_MakeSkyVec(r_sky.st_maxs[0][i], r_sky.st_maxs[1][i], i);
R_MakeSkyVec(r_sky.st_maxs[0][i], r_sky.st_mins[1][i], i);
glDrawArrays(GL_QUADS, 0, r_sky.vert_index / 3);
r_sky.texcoord_index = r_sky.vert_index = 0;
}
if (r_state.fog_enabled)
glFogf(GL_FOG_END, FOG_END);
glPopMatrix();
}
