Fixed map path and generation.

Also found an issue with collisions and room-switching. This has been
fixed also.

data/mapgen.lua

@@ -1,3 +1,15 @@
+-- Setting up some functions
+local time = os.time
+local random = math.random
+local randomseed = math.randomseed
+
+-- CONSTANTS
+UP		= 1
+LEFT	= 2
+RIGHT	= 3
+DOWN	= 4
+
+-- BEGIN FUNCTIONS
 function add_tiles_to_room (map, texture)
 	for i=0,15 do
 		for j=0,11 do
@@ -46,17 +58,129 @@ function add_walls_to_room (map, texture)
 	end
 end
 
-map = create_map()
--- add_texture(map, "path/to/a/fancy/texture")
--- add_tile(map, 1, 2, 3)
+function matrix_coverage (matrix)
+	local cov = 0
+	for i=1,10 do
+		for j=1,10 do
+			if matrix[i][j] > 0 then cov = cov + 1 end
+		end
+	end
+	return cov
+end
 
-local floorTexture = add_texture(map, "assets/Objects/Floor.png")
-local wallTexture = add_texture(map, "assets/Objects/Wall.png")
+function create_room ()
+	local room = {}
+	room.exits = {}
+end
 
-for i=0,9 do
-	for j=0,9 do
-		set_current_room(map, i, j);
-		add_tiles_to_room(map, floorTexture);
-		add_walls_to_room(map, wallTexture);
+function generate_path ()
+	local map_matrix = {}
+	for i=1,10 do
+		map_matrix[i] = {}
+		for j=1,10 do
+			map_matrix[i][j] = 0
+		end
+	end
+
+	local cx, cy = 1, 1
+	local seed = time();
+	print("[**] Map generation seed: " .. seed)
+	randomseed(seed)
+	local direction = 0;
+	local lastDirection = 0;
+	while matrix_coverage(map_matrix) < 30 do
+		local direction = random(4)
+
+		if lastDirection > 0 then
+			if random(24) <= 8 then direction = lastDirection end
+		end
+
+		if direction == UP and cy > 1 then -- UP
+			map_matrix[cx][cy] = direction
+			cy = cy - 1;
+		elseif direction == LEFT and cx > 1 then -- LEFT
+			map_matrix[cx][cy] = direction
+			cx = cx - 1;
+		elseif direction == RIGHT and cx < 10 then -- RIGHT
+			map_matrix[cx][cy] = direction
+			cx = cx + 1;
+		elseif direction == DOWN and cy < 10 then -- DOWN
+			map_matrix[cx][cy] = direction
+			cy = cy + 1;
+		end
+		lastDirection = direction
+	end
+	map_matrix[cx][cy] = 5 -- The final room
+
+	return map_matrix;
+end
+
+function add_exit(map, direction, floorTexture, wallTexture)
+	if direction > 4 then return end
+
+	if direction == UP then
+		add_tile(map, 7, 0, floorTexture, 16, 64, false)
+	elseif direction == LEFT then
+		add_tile(map, 0, 5, floorTexture, 16, 64, false)
+	elseif direction == RIGHT then
+		add_tile(map, 15, 5, floorTexture, 16, 64, false)
+	elseif direction == DOWN then
+		add_tile(map, 7, 11, floorTexture, 16, 64, false)
 	end
 end
+
+function add_reverse_exit(map, direction, floorTexture, wallTexture)
+	local reverseDirection
+
+	if direction == UP then reverseDirection = DOWN
+	elseif direction == DOWN then reverseDirection = UP
+	elseif direction == LEFT then reverseDirection = RIGHT
+	elseif direction == RIGHT then reverseDirection = LEFT
+	else reverseDirection = 5 end
+
+	add_exit(map, reverseDirection, floorTexture, wallTexture)
+end
+-- END FUNCTIONS
+
+-- BEGIN SCRIPT
+map = create_map() -- 'map' needs to be global
+local floorTexture = add_texture(map, "assets/Objects/Floor.png")
+local wallTexture = add_texture(map, "assets/Objects/Wall.png")
+local map_matrix = generate_path()
+
+-- Print path [Debug]
+for i=1,10 do
+	for j=1,10 do
+		io.write(map_matrix[j][i] .. " ")
+	end
+	io.write("\n")
+end
+
+for i=1,10 do
+	for j=1,10 do
+		if map_matrix[i][j] > 0 then
+			set_current_room(map, i-1, j-1);
+			add_tiles_to_room(map, floorTexture);
+			add_walls_to_room(map, wallTexture);
+		end
+	end
+end
+for i=1,10 do
+	for j=1,10 do
+		if map_matrix[i][j] > 0 then
+			set_current_room(map, i-1, j-1);
+			add_exit(map, map_matrix[i][j], floorTexture, wallTexture);
+			if map_matrix[i][j] == UP then
+				set_current_room(map, i-1, j-2)
+			elseif map_matrix[i][j] == LEFT then
+				set_current_room(map, i-2, j-1)
+			elseif map_matrix[i][j] == RIGHT then
+				set_current_room(map, i, j-1)
+			elseif map_matrix[i][j] == DOWN then
+				set_current_room(map, i-1, j)
+			end
+			add_reverse_exit(map, map_matrix[i][j], floorTexture, wallTexture);
+		end
+	end
+end
+-- END SCRIPT

src/main.c

@@ -157,6 +157,7 @@ void close()
 {
 	sprite_destroy(gPlayer);
 	map_destroy(gMap);
+	roommatrix_destroy(gRoomMatrix);
 	SDL_DestroyWindow(gWindow);
 	gWindow = NULL;
 	IMG_Quit();

src/map_lua.c

@@ -65,7 +65,7 @@ int l_map_set_current_room(lua_State *L)
 	room_x = luaL_checkinteger(L, 2);
 	room_y = luaL_checkinteger(L, 3);
 	
-	map->currentRoom = (Position) { room_y, room_x };
+	map->currentRoom = (Position) { room_x, room_y };
 
 	return 0;
 }

src/player.c

@@ -4,8 +4,13 @@
 static
 bool has_collided(Sprite *sprite, RoomMatrix *matrix)
 {
-	Position pos = position_to_matrix_coords(&sprite->pos);
-	return matrix->spaces[pos.x][pos.y].occupied;
+	Position roomCoord = position_to_room_coords(&sprite->pos);
+	if (roomCoord.x != matrix->roomPos.x || roomCoord.y != matrix->roomPos.y) {
+		return false;
+	}
+
+	Position matrixPos = position_to_matrix_coords(&sprite->pos);
+	return matrix->spaces[matrixPos.x][matrixPos.y].occupied;
 }
 
 static

src/position.c

@@ -14,3 +14,17 @@ Position position_to_matrix_coords(Position *src)
 
 	return pos;
 }
+
+Position position_to_room_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 - (src->x % room_px_width)) / room_px_width;
+	pos.y = (src->y - (src->y % room_px_height)) / room_px_height;
+
+	return pos;
+}

src/position.h

@@ -8,4 +8,6 @@ typedef struct {
 
 Position position_to_matrix_coords(Position*);
 
+Position position_to_room_coords(Position*);
+
 #endif // POSITION_H_

src/roommatrix.c

@@ -14,7 +14,8 @@ void roommatrix_populate_from_map(RoomMatrix *rm, Map *m)
 	int i, j;
 	Room *r;
 
-	r = m->rooms[m->currentRoom.x][m->currentRoom.y];
+	rm->roomPos = m->currentRoom;
+	r = m->rooms[rm->roomPos.x][rm->roomPos.y];
 
 	for (i = 0; i < MAP_ROOM_WIDTH; ++i) {
 		for (j = 0; j < MAP_ROOM_HEIGHT; ++j) {
@@ -34,6 +35,7 @@ void roommatrix_reset(RoomMatrix *m)
 			m->spaces[i][j].player = NULL;
 		}
 	}
+	m->roomPos = (Position) { 0, 0 };
 }
 
 void roommatrix_destroy(RoomMatrix *m)

src/roommatrix.h

@@ -3,6 +3,7 @@
 
 #include <stdbool.h>
 #include "defines.h"
+#include "position.h"
 
 typedef struct Sprite_t Sprite;
 typedef struct Map_t Map;
@@ -15,6 +16,7 @@ typedef struct {
 
 typedef struct {
 	RoomSpace spaces[MAP_ROOM_WIDTH][MAP_ROOM_HEIGHT];
+	Position roomPos;
 } RoomMatrix;
 
 RoomMatrix* roommatrix_create();