Implement (somewhat) functional collision

4 files changed, 101 insertions, 27 deletions

diff --git a/include/so_long.h b/include/so_long.h
index 6834620..cddfa9e 100644
--- a/include/so_long.h
+++ b/include/so_long.h
@@ -6,7 +6,7 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/05/08 14:14:02 by dkaiser           #+#    #+#             */
-/*   Updated: 2024/05/14 13:52:05 by dkaiser          ###   ########.fr       */
+/*   Updated: 2024/05/14 14:43:41 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -86,7 +86,10 @@ int				draw_map(t_game *game);
 void			on_key_input(mlx_key_data_t event, void *params);
 t_vector		grid_to_screen_pos(t_ivector grid_pos, t_ivector tile_size);
 t_ivector		screen_to_grid_pos(t_vector screen_pos, t_ivector tile_size);
-int				check_collision(t_vector a_pos, t_vector a_size, t_vector b_pos,
-					t_vector b_size);
+enum e_tile		get_tile(t_tilemap *map, int x, int y);
+int				check_collision(t_vector a_pos, t_ivector a_size,
+					t_vector b_pos, t_ivector b_size);
+int				check_wall_collision(t_vector a_pos, t_ivector a_size,
+					t_tilemap *map);
 
 #endif // SO_LONG_H
diff --git a/src/collision.c b/src/collision.c
index fee1452..a45f339 100644
--- a/src/collision.c
+++ b/src/collision.c
@@ -6,30 +6,80 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/05/14 11:48:59 by dkaiser           #+#    #+#             */
-/*   Updated: 2024/05/14 12:26:02 by dkaiser          ###   ########.fr       */
+/*   Updated: 2024/05/14 14:59:13 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "so_long.h"
 
-int	check_collision(t_vector a_pos, t_vector a_size, t_vector b_pos,
-		t_vector b_size)
+static int	check_wall_collision_with_cell(t_vector a_pos, t_ivector a_size,
+				t_tilemap *map, t_ivector tile);
+
+/*
+ * Checks if a and b are colliding and returns the direction relative to a.
+ * Example: The top left edge of a and the bottom right of b overlap.
+ * In this case, check_collision() will return (UP | LEFT).
+ */
+int	check_collision(t_vector a_pos, t_ivector a_size, t_vector b_pos,
+		t_ivector b_size)
 {
-    int result;
+	int	result;
 
-    result = 0;
+	result = 0;
 	if (a_pos.x < b_size.x + b_pos.x && a_pos.x + a_size.x > b_pos.x
 		&& a_pos.y < b_size.y + b_pos.y && a_pos.y + a_size.y > b_pos.y)
-    {
-        if (a_pos.x < b_pos.x)
-            result |= RIGHT;
-        if (a_pos.x > b_pos.x)
-            result |= LEFT;
-        if (a_pos.y < b_pos.y)
-            result |= DOWN;
-        if (a_pos.y > b_pos.y)
-            result |= UP;
-    }
+	{
+		if (a_pos.x < b_pos.x)
+			result |= RIGHT;
+		if (a_pos.x > b_pos.x)
+			result |= LEFT;
+		if (a_pos.y < b_pos.y)
+			result |= DOWN;
+		if (a_pos.y > b_pos.y)
+			result |= UP;
+	}
 	return (result);
 }
 
+int	check_wall_collision(t_vector a_pos, t_ivector a_size, t_tilemap *map)
+{
+	int			result;
+	t_ivector	a_tile;
+	t_ivector	check_tile;
+	int			x;
+	int			y;
+
+    result = 0;
+	a_tile = screen_to_grid_pos(a_pos, map->tile_size);
+	x = -1;
+	while (x <= 1)
+	{
+		y = -1;
+		while (y <= 1)
+		{
+            check_tile.x = a_tile.x + x;
+            check_tile.y = a_tile.y + y;
+			result |= check_wall_collision_with_cell(a_pos, a_size, map,
+					check_tile);
+			y++;
+		}
+		x++;
+	}
+	return (result);
+}
+
+static int	check_wall_collision_with_cell(t_vector a_pos, t_ivector a_size,
+		t_tilemap *map, t_ivector tile)
+{
+	t_vector	wall_pos;
+	t_ivector	wall_size;
+
+	if (get_tile(map, tile.x, tile.y) == WALL)
+	{
+		wall_pos = grid_to_screen_pos(tile, map->tile_size);
+		wall_size.x = map->tile_size.x;
+		wall_size.y = map->tile_size.y;
+		return (check_collision(a_pos, a_size, wall_pos, wall_size));
+	}
+	return (0);
+}
diff --git a/src/map_utils.c b/src/map_utils.c
index 54577a8..82acaa9 100644
--- a/src/map_utils.c
+++ b/src/map_utils.c
@@ -6,7 +6,7 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/05/14 13:19:34 by dkaiser           #+#    #+#             */
-/*   Updated: 2024/05/14 13:50:23 by dkaiser          ###   ########.fr       */
+/*   Updated: 2024/05/14 14:44:39 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -29,3 +29,8 @@ t_ivector screen_to_grid_pos(t_vector screen_pos, t_ivector tile_size)
     grid_pos.y = screen_pos.y / tile_size.y;
     return (grid_pos);
 }
+
+enum e_tile get_tile(t_tilemap *map, int x, int y)
+{
+    return map->tiles[y * map->grid_size.x + x];
+}
diff --git a/src/player_process.c b/src/player_process.c
index 8cabe9a..5fcf994 100644
--- a/src/player_process.c
+++ b/src/player_process.c
@@ -6,26 +6,42 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/05/14 12:40:05 by dkaiser           #+#    #+#             */
-/*   Updated: 2024/05/14 12:44:17 by dkaiser          ###   ########.fr       */
+/*   Updated: 2024/05/14 15:12:28 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
+#include "ft_printf.h"
 #include "so_long.h"
 
 static t_vector	get_direction_from_input(t_game *game);
 
 void	player_process(t_game *game)
 {
-	t_player	player;
+	t_player	*player;
+	t_vector collision_pos;
+    int collision;
 
-	player = game->player;
-	player.direction = get_direction_from_input(game);
-	player.velocity.x = player.direction.x * PLAYER_MOVE_SPEED
+	player = &game->player;
+	player->direction = get_direction_from_input(game);
+	player->velocity.x = player->direction.x * PLAYER_MOVE_SPEED
 		* game->mlx->delta_time;
-	player.velocity.y = player.direction.y * PLAYER_MOVE_SPEED
+	player->velocity.y = player->direction.y * PLAYER_MOVE_SPEED
 		* game->mlx->delta_time;
-	player.position.x += player.velocity.x;
-	player.position.y += player.velocity.y;
+
+	collision_pos.x = player->position.x + player->velocity.x;
+	collision_pos.y = player->position.y + player->velocity.y;
+    collision = check_wall_collision(collision_pos, game->map.tile_size, &game->map);
+	if (collision & LEFT && player->velocity.x < 0)
+		player->velocity.x = 0;
+	if (collision & RIGHT && player->velocity.x > 0)
+		player->velocity.x = 0;
+	if (collision & UP && player->velocity.y < 0)
+		player->velocity.y = 0;
+	if (collision & DOWN && player->velocity.y > 0)
+		player->velocity.y = 0;
+
+	player->position.x += player->velocity.x;
+	player->position.y += player->velocity.y;
 }
 
 static t_vector	get_direction_from_input(t_game *game)