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place_meeting

This commit is contained in:
kdx 2023-03-17 20:53:35 +01:00
parent c237c77561
commit 127299656c
2 changed files with 35 additions and 4 deletions
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37
src/entity.c
View File

@ -2,19 +2,48 @@
#include "game.h"
#include "map.h"
#include "cfg.h"
#include <stddef.h>
void
_points(Entity *this, int ox, int oy, int *x0, int *x1, int *y0, int *y1)
{
*x0 = this->pos[0] - this->width / 2 + ox;
*y0 = this->pos[1] - this->width / 2 + oy;
*x1 = *x0 + this->width - 1;
*y1 = *y0 + this->height - 1;
}
bool
entity_collide(Entity *this, Game *g, int ox, int oy)
{
(void)g;
const int x0 = this->pos[0] - this->width / 2 + ox;
const int y0 = this->pos[1] - this->height / 2 + oy;
const int x1 = x0 + this->width - 1;
const int y1 = y0 + this->height - 1;
int x0, y0, x1, y1;
_points(this, ox, oy, &x0, &x1, &y0, &y1);
return (map_get_px(x0, y0) == 1 || map_get_px(x0, y1) == 1 ||
map_get_px(x1, y0) == 1 || map_get_px(x1, y1) == 1);
}
bool
entity_meet(Entity *this, Entity *other)
{
int tx0, ty0, tx1, ty1;
int ox0, oy0, ox1, oy1;
_points(this, 0, 0, &tx0, &tx1, &ty0, &ty1);
_points(other, 0, 0, &ox0, &ox1, &oy0, &oy1);
return (tx0 < ox1 && tx1 > ox0 && ty0 < oy1 && ty1 > oy0);
}
Entity *
entity_place_meeting(Entity *this, Game *g, EntityType type)
{
for (int i = 0; i < MAX_ENTITIES; i++)
if (this != &g->entities[i] && g->entities[i].type == type &&
entity_meet(this, &g->entities[i]))
return &g->entities[i];
return NULL;
}
void
entity_move(Entity *this, Game *g)
{

2
src/entity.h
View File

@ -31,4 +31,6 @@ struct Entity {
};
bool entity_collide(Entity *this, struct Game *g, int ox, int oy);
bool entity_meet(Entity *this, Entity *other);
Entity *entity_place_meeting(Entity *this, struct Game *g, EntityType type);
void entity_move(Entity *this, struct Game *g);