Spikes! Well chains. Whatever.

include/main.h

@@ -3,6 +3,7 @@
 #include "camera.h"
 #include "input.h"
 
+/* returns true if player died */
 int play_level(uint level_id);
 /* callback used for UPS control */
 int callback(volatile void *arg);

include/player.h

@@ -13,6 +13,7 @@ typedef struct Player {
 	Vec origin; /* the origin of the sprite (offset) */
 	uint grace; /* coyot jump */
 	bool jump_held; /* used to control jump height */
+	bool dead; /* set to true the player will die */
 } Player;
 
 #include "level.h"

include/tiles.h

@@ -9,10 +9,12 @@ typedef unsigned char Tile_flags; /* the tile properties (bitmask) */
 /* define flags */
 #define F_SOLID 0b1
 #define F_SLIPPERY 0b10
+#define F_SPIKY 0b100
 
 /* define properties */
 #define P_AIR		(0)
 #define P_BASE		(F_SOLID)
+#define P_SPIKE		(F_SPIKY)
 #define P_UNKNOWN	(0)
 
 enum {

src/main.c

@@ -20,7 +20,7 @@ int main(void) {
 	init(); /* initialize gint */
 
 	/* main game loop */
-	play_level(1);
+	while (play_level(1)) {};
 
 	/* return to menu */
 	return 1;
@@ -35,7 +35,8 @@ int play_level(uint level_id) {
 		.vbox = {7, 7},
 		.origin = {0 * VEC_PRECISION, 0 * VEC_PRECISION},
 		.grace = 0,
-		.jump_held = false
+		.jump_held = false,
+		.dead = false
 	};
 
 	/* set level */
@@ -56,7 +57,8 @@ int play_level(uint level_id) {
 
 	/* UPS control */
 	volatile int has_ticked = 1;
-	timer_start(timer_setup(TIMER_ANY, 1000000/UPS, callback, &has_ticked));
+	int timer = timer_setup(TIMER_ANY, 1000000/UPS, callback, &has_ticked);
+	timer_start(timer);
 
 	uint step = 0;
 
@@ -69,11 +71,17 @@ int play_level(uint level_id) {
 			/* step event is where all the logic happens */
 			step += 1;
 			step_event(&player, level, &camera, &input, step);
+			/* player death check */
+			if(player.dead) {
+				timer_stop(timer);
+				return 1;
+			}
 		}
 		/* draw event just draws stuff */
 		draw_event(&player, level, &camera, &input, step);
 	}
-	return 1;
+	timer_stop(timer);
+	return 0;
 }
 
 int callback(volatile void *arg) {

src/player.c

@@ -109,6 +109,10 @@ void player_step(Player *player, Input *input, const Level *level, uint step) {
 		player->jump_held = false;
 	}
 	player_move(player, level); /* move the player according to their speed */
+	/* player death */
+	if (player_collide_or(player, player->pos, level) & F_SPIKY) {
+		player->dead = true;
+	}
 }
 
 void player_draw(Player *player, Camera *camera) {

src/tiles.c

@@ -3,9 +3,11 @@
 Tile_flags tile_get_flags(Tile tile) {
 	switch (tile) {
 		case ID_AIR:
-		case ID_CHAIN:
 			return P_AIR;
 			break;
+		case ID_CHAIN:
+			return P_SPIKE;
+			break;
 		case ID_BASE_0:
 		case ID_BASE_1:
 		case ID_BASE_2: