particle manager & shatter

CMakeLists.txt

@@ -19,6 +19,8 @@ set(SOURCES
 	src/util.c
 	src/camera.c
 	src/anim.c
+	src/shatter.c
+	src/particles.c
 )
 
 set(LEVELS
@@ -27,6 +29,7 @@ set(LEVELS
 
 set(ASSETS
 	res/tileset.png
+	res/shatter.png
 	${LEVELS}
 )
 

inc/anim.h

@@ -11,6 +11,7 @@ struct Anim {
 	int life_ini;
 	int life;
 	int loop;
+	void (*callback)(struct Anim *);
 };
 
 struct Anim anim_new(bopti_image_t *, int x, int y, int frame_width,

inc/particles.h

@@ -0,0 +1,9 @@
+#pragma once
+#include "anim.h"
+
+#define MAX_PARTICLES 64
+
+void particles_init(void);
+void particles_add(struct Anim);
+void particles_update(void);
+void particles_draw(void);

inc/shatter.h

@@ -0,0 +1,3 @@
+#pragma once
+
+void shatter(int x, int y);

res/fxconv-metadata.txt

@@ -1,3 +1,6 @@
 tileset.png:
   type: bopti-image
   name: bimg_tileset
+shatter.png:
+  type: bopti-image
+  name: bimg_shatter

src/anim.c

@@ -16,6 +16,7 @@ anim_new(bopti_image_t *texture, int x, int y, int frame_width,
 	anim.life_ini = frame_duration * texture->width / frame_width;
 	anim.life = anim.life_ini;
 	anim.loop = loop;
+	anim.callback = NULL;
 	return anim;
 }
 
@@ -27,6 +28,8 @@ anim_update(struct Anim *a)
 	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;

src/level.c

@@ -87,7 +87,7 @@ level_set(int x, int y, enum Tile v)
 {
 	if (x < 0 || y < 0 || x >= self.width || y >= self.height)
 		return;
-	self.data[x + y * self.size] = v;
+	self.data[x + y * self.width] = v;
 }
 
 void

src/main.c

@@ -2,6 +2,7 @@
 #include "conf.h"
 #include "input.h"
 #include "level.h"
+#include "particles.h"
 #include "player.h"
 #include "vec.h"
 #include <gint/cpu.h>
@@ -25,6 +26,7 @@ main(void)
 	                        GINT_CALL(callback, &has_ticked));
 	timer_start(timer);
 	input_init();
+	particles_init();
 	level_load(&lvl_test);
 	player_init(level_find(TILE_PLAYER));
 	camera_init(player_pos());
@@ -52,6 +54,7 @@ main(void)
 static void
 update(void)
 {
+	particles_update();
 	input_update();
 	player_update();
 	camera_update();
@@ -63,6 +66,7 @@ draw(void)
 	dclear(C_BLACK);
 	level_draw();
 	player_draw();
+	particles_draw();
 	dupdate();
 }
 

src/particles.c

@@ -0,0 +1,39 @@
+#include "particles.h"
+#include "anim.h"
+
+static struct Anim particles[MAX_PARTICLES];
+
+void
+particles_init(void)
+{
+	int i = MAX_PARTICLES;
+	while (i-- > 0)
+		particles[i] = anim_new(NULL, 0, 0, 1, 0, 0);
+}
+
+void
+particles_add(struct Anim a)
+{
+	/* find empty spot */
+	int i = MAX_PARTICLES;
+	while (i-- > 0)
+		if (!particles[i].life)
+			break;
+	particles[i] = a;
+}
+
+void
+particles_update(void)
+{
+	int i = MAX_PARTICLES;
+	while (i-- > 0)
+		anim_update(&particles[i]);
+}
+
+void
+particles_draw(void)
+{
+	int i = MAX_PARTICLES;
+	while (i-- > 0)
+		anim_draw(&particles[i]);
+}

src/player.c

@@ -3,6 +3,7 @@
 #include "conf.h"
 #include "input.h"
 #include "level.h"
+#include "shatter.h"
 #include "util.h"
 #include "vec.h"
 #include <gint/display.h>
@@ -41,6 +42,9 @@ player_update(void)
 	self.spd.y *= 1.0f - AIR_RESISTANCE;
 	self.spd.y += GRAVITY;
 
+	if (input_pressed(K_DOWN))
+		shatter(self.pos.x, self.pos.y + PLAYER_HEIGHT);
+
 	player_move(player_update_rem());
 }
 

src/shatter.c

@@ -0,0 +1,27 @@
+#include "shatter.h"
+#include "anim.h"
+#include "conf.h"
+#include "level.h"
+#include "particles.h"
+#include "tile.h"
+#include "vec.h"
+#include <gint/display.h>
+
+static void callback(struct Anim *);
+
+void
+shatter(int x, int y)
+{
+	extern bopti_image_t bimg_shatter;
+	const int ax = (int)(x / TILE_SIZE) * TILE_SIZE;
+	const int ay = (int)(y / TILE_SIZE) * TILE_SIZE;
+	struct Anim p = anim_new(&bimg_shatter, ax, ay, TILE_SIZE, 2, false);
+	p.callback = callback;
+	particles_add(p);
+}
+
+static void
+callback(struct Anim *a)
+{
+	level_set_px(a->pos.x, a->pos.y, TILE_PLAYER);
+}