Extra helper functions and collision checker.

src/map.odin

@@ -93,6 +93,49 @@ grid_to_world :: proc(col: int, row: int) -> rl.Vector2 {
 	return rl.Vector2{world_x, world_y}
 }
 
+// requires world x/y and then gives the rectangle in pixels that matches that
+get_world_tile_rect :: proc(grid_x, grid_y: f32) -> rl.Rectangle {
+	return rl.Rectangle {
+		grid_x * TILE_SIZE,
+		grid_y * TILE_SIZE,
+		TILE_SIZE, TILE_SIZE
+	}
+}
+
+// Simple check for now
+is_tile_solid :: proc(tile_type: Tile_Type) -> bool {
+	return tile_type == .WALL
+}
+
+// takes in the next position/rect for check compares it
+check_map_collision :: proc(rect: rl.Rectangle, game_map: Game_Map) -> bool {
+
+	// collider top left point
+	min_grid := world_to_grid(rl.Vector2{rect.x, rect.y})
+	// collider bot right point
+	max_grid := world_to_grid(rl.Vector2{rect.x + rect.width, rect.y + rect.height})
+
+	// @TODO bounds check?
+	for gy := min_grid[1]; gy <= max_grid[1]; gy += 1 {
+
+		for gx := min_grid[0]; gx <= max_grid[0]; gx += 1 {
+			idx := (gy * game_map.width) + gx
+			tile := Tile_Type(game_map.data[idx])
+
+			tile_rect := get_world_tile_rect(f32(gx), f32(gy));
+			if is_tile_solid(tile) {
+				if rl.CheckCollisionRecs(rect, tile_rect) {
+					return true
+				}
+
+			}
+		}
+
+	}
+
+	return false
+}
+
 draw_map :: proc(current_map: Game_Map) {
 	for value, index in current_map.data {
 		row := index / current_map.width