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3d:: do not draw cells outside of view

This commit is contained in:
Zeno Rogue 2019-05-11 15:06:48 +02:00
parent e1d30d1a2f
commit 51030e87aa
1 changed files with 45 additions and 0 deletions
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45
graph.cpp
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@ -4190,6 +4190,27 @@ ld mousedist(transmatrix T) {
return sqhypot_d(2, h1) + (invis_point(T1) ? 1e10 : 0);
}
vector<hyperpoint> clipping_planes;
int noclipped;
void make_clipping_planes() {
clipping_planes.clear();
auto add_clipping_plane = [] (ld x1, ld y1, ld x2, ld y2) {
using namespace hyperpoint_vec;
ld z1 = 1, z2 = 1;
hyperpoint sx = point3(y1 * z2 - y2 * z1, z1 * x2 - z2 * x1, x1 * y2 - x2 * y1);
sx /= hypot_d(3, sx);
sx[3] = 0;
clipping_planes.push_back(sx);
};
ld tx = current_display->tanfov;
ld ty = tx * current_display->ysize / current_display->xsize;
add_clipping_plane(+tx, +ty, -tx, +ty);
add_clipping_plane(-tx, +ty, -tx, -ty);
add_clipping_plane(-tx, -ty, +tx, -ty);
add_clipping_plane(+tx, -ty, +tx, +ty);
}
void drawcell(cell *c, transmatrix V, int spinv, bool mirrored) {
cells_drawn++;
@ -4217,6 +4238,28 @@ void drawcell(cell *c, transmatrix V, int spinv, bool mirrored) {
if(orig) gm = V;
}
if(just_gmatrix) return;
if(WDIM == 3 && pmodel == mdPerspective) {
using namespace hyperpoint_vec;
hyperpoint H = tC0(V);
for(hyperpoint& cpoint: clipping_planes) if((H|cpoint) < -sin_auto(corner_bonus)) {
#if CAP_SHMUP
if(shmup::on) {
pair<shmup::mit, shmup::mit> p =
shmup::monstersAt.equal_range(c);
for(shmup::mit it = p.first; it != p.second; it++) {
shmup::monster* m = it->second;
radarpoints.emplace_back(radarpoint{makeradar(V*m->at), minf[m->type].glyph, minf[m->type].color, 0xFF0000FF});
}
}
#endif
if(c->monst)
radarpoints.emplace_back(radarpoint{makeradar(V), minf[c->monst].glyph, minf[c->monst].color, isFriendly(c->monst) ? 0x00FF00FF : 0xFF0000FF});
else if(c->item)
radarpoints.emplace_back(radarpoint{makeradar(V), iinf[c->item].glyph, iinf[c->item].color, kind_outline(c->item)});
return;
}
noclipped++;
}
#if CAP_SHAPES
set_floor(shFloor);
@ -6276,11 +6319,13 @@ void drawthemap() {
last_firelimit = firelimit;
firelimit = 0;
if(DIM == 3) make_clipping_planes();
radarpoints.clear();
callhooks(hooks_drawmap);
frameid++;
cells_drawn = 0;
noclipped = 0;
wavephase = (-(ticks / 100)) & 7;