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Code Issues Releases Wiki Activity

render entities only if visible

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This commit is contained in:
Zeno Rogue 2025-04-27 01:23:00 +02:00
parent 3846ff83c3
commit 0797e540d6
4 changed files with 25 additions and 2 deletions
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2
rogueviz/ru/classes.cpp
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@ -116,6 +116,8 @@ struct entity {
double gwhere_x, gwhere_y;
double gvel_x, gvel_y;
bool visible(room *r);
void clearg() {
gwhere_x = where_x;
gwhere_y = where_y;

6
rogueviz/ru/entity.cpp
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@ -16,6 +16,12 @@ bbox entity::get_pixel_bbox_at(double x, double y) {
return b;
}
bool entity::visible(room *r) {
auto bb = get_intersect(pixel_to_block(get_pixel_bbox()), room_bb);
for(int y = bb.miny; y < bb.maxy; y++) for(int x = bb.minx; x < bb.maxx; x++) if(r->fov[y][x]) return true;
return false;
}
void entity::apply_grav() {
if(non_hyperbolic) return apply_portal_grav();

15
rogueviz/ru/geometry.cpp
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@ -94,8 +94,21 @@ bbox join(bbox a, bbox b) {
return r;
}
bbox room_bb{0, 0, room_x, room_y};
bbox screen_bb{0, 0, screen_x, screen_y};
bbox get_intersect(bbox a, bbox b) {
bbox r;
r.minx = max(a.minx, b.minx);
r.miny = max(a.miny, b.miny);
r.maxx = min(a.maxx, b.maxx);
r.maxy = min(a.maxy, b.maxy);
return r;
}
bool intersect(bbox a, bbox b) {
return max(a.minx, b.minx) < min(a.maxx, b.maxx) && max(a.miny, b.miny) < min(a.maxy, b.maxy);
auto g = get_intersect(a, b);
return g.minx < g.maxx && g.miny < g.maxy;
}
void print(hstream& hs, const bbox& b) {

4
rogueviz/ru/render.cpp
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@ -245,7 +245,9 @@ void man::draw() {
void render_room_objects(room *r) {
initquickqueue();
if(r == current_room) m.draw();
for(auto& e: r->entities) e->draw();
for(auto& e: r->entities)
if(e->visible(r))
e->draw();
quickqueue();
}