Added a room matrix that deals with movement and collisions.

CMakeLists.txt

@@ -26,6 +26,8 @@ add_executable(breakhack
 	src/map_lua
 	src/camera
 	src/timer
+	src/roommatrix
+	src/position
 	)
 
 target_link_libraries(breakhack

src/defines.h

@@ -0,0 +1,13 @@
+#ifndef DEFINES_H_
+#define	DEFINES_H_
+
+/* Room/Map dimensions */
+#define MAP_ROOM_HEIGHT		12
+#define MAP_ROOM_WIDTH		16
+
+#define MAP_V_ROOM_COUNT	10
+#define MAP_H_ROOM_COUNT	10
+
+#define TILE_DIMENSION		64
+
+#endif // DEFINES_H_

src/main.c

@@ -11,6 +11,7 @@
 #include "map.h"
 #include "map_lua.h"
 #include "timer.h"
+#include "roommatrix.h"
 
 #define SCREEN_WIDTH	1024
 #define SCREEN_HEIGHT	768
@@ -20,6 +21,7 @@ static SDL_Renderer	*gRenderer	= NULL;
 static Sprite		*gPlayer	= NULL;
 static LinkedList	*gSpriteList	= NULL;
 static Map		*gMap		= NULL;
+static RoomMatrix	*gRoomMatrix	= NULL;
 
 static Camera		gCamera;
 
@@ -92,6 +94,7 @@ bool init()
 	if (result) {
 		gCamera.pos = (Position) { 0, 0 };
 		gCamera.renderer = gRenderer;
+		gRoomMatrix = roommatrix_create();
 	}
 	return result;
 }
@@ -112,7 +115,7 @@ bool handle_events()
 		if (event.type == SDL_QUIT) {
 			quit = true;
 		} else {
-			gPlayer->handle_event(gPlayer, &event);
+			gPlayer->handle_event(gPlayer, gRoomMatrix, &event);
 			camera_follow_position(&gCamera, &gPlayer->pos);
 			map_set_current_room(gMap, &gPlayer->pos);
 		}
@@ -131,6 +134,7 @@ void run()
 		timer_start(fpsTimer);
 
 		quit = handle_events();
+		roommatrix_populate_from_map(gRoomMatrix, gMap);
 
 		SDL_RenderClear(gRenderer);
 

src/map.h

@@ -8,24 +8,19 @@
 #include "sprite.h"
 #include "camera.h"
 #include "position.h"
+#include "defines.h"
 
-#define MAP_ROOM_HEIGHT 12
-#define MAP_ROOM_WIDTH	16
-#define MAP_V_ROOM_COUNT 10
-#define MAP_H_ROOM_COUNT 10
-#define TILE_DIMENSION 64
-
-typedef struct {
+typedef struct MapTile_t {
 	unsigned int textureIndex;
 	SDL_Rect clip;
 	bool collider;
 } MapTile;
 
-typedef struct {
+typedef struct Room_t {
 	MapTile* tiles[MAP_ROOM_WIDTH][MAP_ROOM_HEIGHT];
 } Room;
 
-typedef struct {
+typedef struct Map_t {
 	Room* rooms[MAP_H_ROOM_COUNT][MAP_V_ROOM_COUNT];
 	LinkedList *textures;
 	Position currentRoom;

src/player.c

@@ -2,30 +2,67 @@
 #include "player.h"
 
 static
-void handle_player_input(Sprite *sprite, SDL_Event *event)
+bool has_collided(Sprite *sprite, RoomMatrix *matrix)
+{
+	Position pos = position_to_matrix_coords(&sprite->pos);
+	return matrix->spaces[pos.x][pos.y].occupied;
+}
+
+static
+void move_left(Sprite *sprite, RoomMatrix *matrix)
+{
+	sprite->texture->clip.y = 16;
+	sprite->pos.x -= TILE_DIMENSION;
+	if (has_collided(sprite, matrix))
+		sprite->pos.x += TILE_DIMENSION;
+}
+
+static
+void move_right(Sprite *sprite, RoomMatrix *matrix)
+{
+	sprite->texture->clip.y = 32;
+	sprite->pos.x += TILE_DIMENSION;
+	if (has_collided(sprite, matrix))
+		sprite->pos.x -= TILE_DIMENSION;
+}
+
+static
+void move_up(Sprite *sprite, RoomMatrix *matrix)
+{
+	sprite->texture->clip.y = 48;
+	sprite->pos.y -= TILE_DIMENSION;
+	if (has_collided(sprite, matrix))
+		sprite->pos.y += TILE_DIMENSION;
+}
+
+static
+void move_down(Sprite *sprite, RoomMatrix *matrix)
+{
+	sprite->texture->clip.y = 0;
+	sprite->pos.y += TILE_DIMENSION;
+	if (has_collided(sprite, matrix))
+		sprite->pos.y -= TILE_DIMENSION;
+}
+
+static
+void handle_player_input(Sprite *sprite, RoomMatrix *matrix, SDL_Event *event)
 {
-	unsigned int width = sprite->texture->dim.width;
-	unsigned int height = sprite->texture->dim.height;
 	static unsigned int step = 1;
 
 	if (event->type == SDL_KEYDOWN) {
 		switch (event->key.keysym.sym) {
-		case SDLK_LEFT:
-			sprite->texture->clip.y = 16;
-			sprite->pos.x -= width;
-			break;
-		case SDLK_RIGHT:
-			sprite->texture->clip.y = 32;
-			sprite->pos.x += width;
-			break;
-		case SDLK_UP:
-			sprite->texture->clip.y = 48;
-			sprite->pos.y -= height;
-			break;
-		case SDLK_DOWN:
-			sprite->texture->clip.y = 0;
-			sprite->pos.y += height;
-			break;
+			case SDLK_LEFT:
+				move_left(sprite, matrix);
+				break;
+			case SDLK_RIGHT:
+				move_right(sprite, matrix);
+				break;
+			case SDLK_UP:
+				move_up(sprite, matrix);
+				break;
+			case SDLK_DOWN:
+				move_down(sprite, matrix);
+				break;
 		}
 		sprite->texture->clip.x = 16*step;
 		if (step == 3)

src/position.c

@@ -0,0 +1,16 @@
+#include "position.h"
+#include "defines.h"
+
+Position position_to_matrix_coords(Position *src)
+{
+	unsigned int room_px_width, room_px_height;
+	Position pos;
+
+	room_px_width = TILE_DIMENSION * MAP_ROOM_WIDTH;
+	room_px_height = TILE_DIMENSION * MAP_ROOM_HEIGHT;
+
+	pos.x = (src->x % room_px_width) / TILE_DIMENSION;
+	pos.y = (src->y % room_px_height) / TILE_DIMENSION;
+
+	return pos;
+}

src/position.h

@@ -6,4 +6,6 @@ typedef struct {
 	int y;
 } Position;
 
+Position position_to_matrix_coords(Position*);
+
 #endif // POSITION_H_

src/roommatrix.c

@@ -0,0 +1,42 @@
+#include "roommatrix.h"
+#include "util.h"
+#include "map.h"
+
+RoomMatrix* roommatrix_create()
+{
+	RoomMatrix *m = ec_malloc(sizeof(RoomMatrix));
+	roommatrix_reset(m);
+	return m;
+}
+
+void roommatrix_populate_from_map(RoomMatrix *rm, Map *m)
+{
+	int i, j;
+	Room *r;
+
+	r = m->rooms[m->currentRoom.x][m->currentRoom.y];
+
+	for (i = 0; i < MAP_ROOM_WIDTH; ++i) {
+		for (j = 0; j < MAP_ROOM_HEIGHT; ++j) {
+			rm->spaces[i][j].occupied = r->tiles[i][j]->collider;
+		}
+	}
+}
+
+void roommatrix_reset(RoomMatrix *m)
+{
+	int i, j;
+
+	for (i = 0; i < MAP_ROOM_WIDTH; ++i) {
+		for (j = 0; j < MAP_ROOM_HEIGHT; ++j) {
+			m->spaces[i][j].occupied = false;
+			m->spaces[i][j].character = NULL;
+			m->spaces[i][j].player = NULL;
+		}
+	}
+}
+
+void roommatrix_destroy(RoomMatrix *m)
+{
+	free(m);
+}

src/roommatrix.h

@@ -0,0 +1,28 @@
+#ifndef ROOMMATRIX_H_
+#define	ROOMMATRIX_H_
+
+#include <stdbool.h>
+#include "defines.h"
+
+typedef struct Sprite_t Sprite;
+typedef struct Map_t Map;
+
+typedef struct {
+	bool occupied;
+	Sprite* character;
+	Sprite* player;
+} RoomSpace;
+
+typedef struct {
+	RoomSpace spaces[MAP_ROOM_WIDTH][MAP_ROOM_HEIGHT];
+} RoomMatrix;
+
+RoomMatrix* roommatrix_create();
+
+void roommatrix_populate_from_map(RoomMatrix*, Map*);
+
+void roommatrix_reset(RoomMatrix*);
+
+void roommatrix_destroy(RoomMatrix*);
+
+#endif // ROOMMATRIX_H_

src/sprite.h

@@ -6,11 +6,12 @@
 #include "texture.h"
 #include "position.h"
 #include "camera.h"
+#include "roommatrix.h"
 
-typedef struct Sprite_t{
+typedef struct Sprite_t {
 	Texture *texture;
 	Position pos;
-	void (*handle_event)(struct Sprite_t *sprite, SDL_Event*);
+	void (*handle_event)(struct Sprite_t*, RoomMatrix*, SDL_Event*);
 } Sprite;
 
 Sprite* sprite_create();