55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
#include "map.h"
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#include <stdlib.h>
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rect tile_shape(tileset_t const *tileset, int id)
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{
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if(!tileset->tiles[id].solid)
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return (rect){ 0 };
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return (rect){
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.l = -fix(0.5),
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.r = fix(0.5),
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.t = -fix(0.5),
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.b = fix(0.5),
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};
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}
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map_cell_t *map_cell(map_t const *m, int x, int y)
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{
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if((unsigned)x >= m->width || (unsigned)y >= m->height)
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return NULL;
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return &m->cells[y * m->width + x];
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}
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bool map_collides(map_t const *m, rect hitbox)
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{
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int y_min = ffloor(hitbox.t);
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int y_max = fceil(hitbox.b);
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int x_min = ffloor(hitbox.l);
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int x_max = fceil(hitbox.r);
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/* Collisions against walls and static objects */
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for(int y = y_min; y < y_max; y++)
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for(int x = x_min; x < x_max; x++) {
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map_cell_t *t = map_cell(m, x, y);
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if(!t) continue;
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vec2 c = { fix(x) + fix(0.5), fix(y) + fix(0.5) };
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rect tile_hitbox;
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if(m->tileset->tiles[t->base].solid) {
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tile_hitbox = rect_translate(tile_shape(m->tileset, t->base), c);
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if(rect_collide(hitbox, tile_hitbox))
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return true;
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}
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if(m->tileset->tiles[t->decor].solid) {
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tile_hitbox = rect_translate(tile_shape(m->tileset, t->decor), c);
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if(rect_collide(hitbox, tile_hitbox))
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return true;
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}
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}
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return false;
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}
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