crystal-tower/src/anim.c

#include "anim.h"
#include "camera.h"
#include "raygint/display.h"
#include "vec.h"
#include <stddef.h>

struct Anim
anim_new(bopti_image_t *texture, int x, int y, int frame_width,
         int frame_duration, int loop)
{
	struct Anim anim;
	anim.texture = texture;
	anim.pos = VEC(x, y);
#ifdef GINT
	anim.frame_dim = VEC(frame_width, texture->height);
	anim.life_ini = frame_duration * texture->width / frame_width;
#endif
#ifdef RAYLIB
	anim.frame_dim = VEC(frame_width, frame_width);
	anim.life_ini = frame_duration * anim.frame_dim.x * 8;
#endif
	anim.frame_duration = frame_duration;
	anim.frame = 0;
	anim.life = anim.life_ini;
	anim.loop = loop;
	anim.callback = NULL;
	return anim;
}

void
anim_update(struct Anim *a)
{
	if (!a->life)
		return;
	a->life--;
	if (a->life % a->frame_duration == 0)
		a->frame++;
	if (!a->life && a->callback != NULL)
		a->callback(a);
	/* loop */
	if (!a->life && a->loop) {
		a->frame = 0;
		a->life = a->life_ini;
	}
}

#ifdef GINT
void
anim_draw(struct Anim *a)
{
	if (a->life) {
		const struct Vec off = camera_offset();
		const int x = a->pos.x + off.x;
		const int y = a->pos.y + off.y;
		const int rx = a->frame * a->frame_dim.x;
		const int ry = 0;
		dsubimage(x, y, a->texture, rx, ry, a->frame_dim.x,
		          a->frame_dim.y, DIMAGE_NONE);
	}
}
#endif

#ifdef RAYLIB
void
anim_draw(struct Anim *a)
{
	if (a->life) {
		const struct Vec off = camera_offset();
		const int x1 = a->pos.x + off.x;
		const int y1 = a->pos.y + off.y;
		const int x2 = x1 + a->frame_dim.x - 1;
		const int y2 = y1 + a->frame_dim.y - 1;
		drect(x1, y1, x2, y2, C_BLUE);
	}
}
#endif