particule example

4 files changed, 40 insertions, 4 deletions

diff --git a/src/entity.h b/src/entity.h
index c444be8..45a1a9c 100644
--- a/src/entity.h
+++ b/src/entity.h
@@ -15,6 +15,11 @@ struct Entity {
 	int width;
 	int height;
 	bool ignore_solids;
+	union {
+		struct {
+			int life;
+		} part;
+	};
 };
 
 unsigned int entity_type(const char *typename);
diff --git a/src/game.h b/src/game.h
index 6883f76..35da7dc 100644
--- a/src/game.h
+++ b/src/game.h
@@ -1,7 +1,7 @@
 #pragma once
 #include "entity.h"
 
-enum { MAX_ENTITIES = 128 };
+enum { MAX_ENTITIES = 256 };
 
 typedef struct Game {
 	unsigned long uuid;
diff --git a/src/part.c b/src/part.c
new file mode 100644
index 0000000..c2d684d
--- /dev/null
+++ b/src/part.c
@@ -0,0 +1,29 @@
+#include "entityimpl.h"
+#include <stdlib.h>
+
+IMPL_INIT(part) {
+	this->width = this->height = 1 + rand() % 2;
+	this->ignore_solids = true;
+	this->part.life = 30 + rand() % 10;
+	this->vel[0] = (float)(rand() % 1024) / 1023.0;
+	this->vel[1] = (float)(rand() % 1024) / 1023.0;
+	this->vel[0] *= 1 - 2 * (rand() % 2);
+	this->vel[1] *= 1 - 2 * (rand() % 3);
+}
+
+IMPL(update) {
+	this->part.life -= 1;
+	if (this->part.life <= 0) {
+		this->type = 0;
+		return;
+	}
+	this->vel[1] += 0.1;
+
+	entity_move(this, g);
+}
+
+IMPL(draw) {
+	TZR_DrawSetColor(1, 1, 1, 1);
+	TZR_DrawRectangle(true, this->pos[0], this->pos[1],
+	                  this->width, this->height);
+}
diff --git a/src/player.c b/src/player.c
index 1871944..847202b 100644
--- a/src/player.c
+++ b/src/player.c
@@ -1,16 +1,18 @@
 #include "entityimpl.h"
 
 IMPL(draw) {
-	TZR_DrawSetColor(1, 1, 1, 1);
+	TZR_DrawSetColor(1, 1, 1, 0.5);
 	TZR_DrawRectangle(true, this->pos[0] - this->width / 2,
 	                  this->pos[1] - this->height / 2,
 	                  this->width, this->height);
 }
 
 IMPL(update) {
-	this->vel[0] = TZR_IsKeyDown(SDL_SCANCODE_RIGHT)
-	             - TZR_IsKeyDown(SDL_SCANCODE_LEFT);
+	this->vel[0] = 2 * TZR_IsKeyDown(SDL_SCANCODE_RIGHT)
+	             - 2 * TZR_IsKeyDown(SDL_SCANCODE_LEFT);
 	entity_move(this, g);
+	entity_init(game_create_entity(g), entity_type("part"), this->pos[0],
+	            this->pos[1], 0, 0);
 }
 
 IMPL_INIT(player) {