able to spawn enemy when pressing space

game/app.odin

@@ -3,7 +3,7 @@ package game
 import rl "vendor:raylib"
 
 run :: proc() {
-	rl.InitWindow(640, 480, "Tower Defense")
+	rl.InitWindow(SCREEN_W, SCREEN_H, "Tower Defense")
 	defer rl.CloseWindow()
 	rl.SetTargetFPS(60)
 

game/constants.odin

@@ -4,3 +4,6 @@ MAP_W :: 16 // map width in tiles
 MAP_H :: 12 // map height in tiles
 TILE_SIZE :: 32 // size of tiles in pixels
 
+SCREEN_W :: MAP_W * TILE_SIZE
+SCREEN_H :: MAP_H * TILE_SIZE
+

game/enemy.odin

@@ -0,0 +1,18 @@
+package game
+
+Enemy :: struct {
+	position: Vec2,
+	health:   int,
+	active:   bool,
+}
+
+spawn_enemy :: proc(world: ^World) {
+	if len(world.path) == 0 do return // don't spawn enemies if no paths exist
+
+	world.enemy = Enemy {
+		position = world.path[0],
+		health   = 20,
+		active   = true,
+	}
+}
+

game/map.odin

@@ -30,5 +30,22 @@ init_map :: proc(world_map: ^Map) {
 			world_map.tiles[y][x] = .Blocked
 		}
 	}
+
+	for x in 1 ..< 13 {
+		world_map.tiles[6][x] = .Path
+	}
+
+	for y in 7 ..< 8 {
+		world_map.tiles[y][12] = .Path
+	}
+
+	for y in 4 ..< 9 {
+		for x in 3 ..< 12 {
+			if world_map.tiles[y][x] != .Path {
+				world_map.tiles[y][x] = .Build
+			}
+		}
+	}
+
 }
 

game/math2d.odin

@@ -0,0 +1,6 @@
+package game
+
+Vec2 :: struct {
+	x, y: f32,
+}
+

game/path.odin

@@ -0,0 +1,16 @@
+package game
+
+build_path :: proc(world_map: ^Map, path: ^[dynamic]Vec2) {
+	clear(path)
+	for y in 0 ..< MAP_H {
+		for x in 0 ..< MAP_W {
+			if world_map.tiles[y][x] == .Path {
+				append(
+					path,
+					Vec2{f32(x * TILE_SIZE + TILE_SIZE / 2), f32(y * TILE_SIZE + TILE_SIZE / 2)},
+				)
+			}
+		}
+	}
+}
+

game/render.odin

@@ -0,0 +1,25 @@
+package game
+
+import "core:fmt"
+import rl "vendor:raylib"
+
+render_world :: proc(world: ^World) {
+	for y in 0 ..< MAP_H {
+		for x in 0 ..< MAP_W {
+			c := tile_color(world.world_map.tiles[y][x])
+			rl.DrawRectangle(i32(x * TILE_SIZE), i32(y * TILE_SIZE), TILE_SIZE, TILE_SIZE, c)
+		}
+	}
+
+	for p in world.path {
+		rl.DrawCircle(i32(p.x), i32(p.y), 3, rl.GOLD)
+	}
+
+	if world.enemy.active {
+		e := world.enemy
+		rl.DrawCircle(i32(e.position.x), i32(e.position.y), 11, rl.MAROON)
+	}
+	rl.DrawText(fmt.ctprintf("Gold: %d", world.gold), 10, 10, 20, rl.BLACK) // Gold HUD
+	rl.DrawText(fmt.ctprintf("Base HP: %d", world.base_health), 10, 32, 20, rl.BLACK) // HP HUD
+}
+

game/world.odin

@@ -5,10 +5,19 @@ import rl "vendor:raylib"
 World :: struct {
 	gold:        int,
 	base_health: int,
+	world_map:   Map,
+	path:        [dynamic]Vec2,
+	enemy:       Enemy,
 }
 
 init_world :: proc() -> World {
-	return World{gold = 10, base_health = 20}
+	world := World {
+		gold        = 100,
+		base_health = 20,
+	}
+	init_map(&world.world_map)
+	build_path(&world.world_map, &world.path)
+	return world
 }
 
 // update world, never draw
@@ -18,10 +27,9 @@ update_world :: proc(world: ^World, dt: f32) {
 	if rl.IsKeyPressed(.G) {
 		world.gold += 10
 	}
-}
-
-render_world :: proc(world: ^World) {
-	rl.DrawText(fmt.caprintf("gold: %d", world.gold), 10, 10, 22, rl.BLACK)
-	rl.DrawText(fmt.caprintf("health: %d", world.base_health), 10, 38, 22, rl.BLACK)
+
+	if rl.IsKeyPressed(.SPACE) {
+		spawn_enemy(world)
+	}
 }