commands, towers, etc

game/commands.odin

@@ -0,0 +1,32 @@
+package game
+
+import rl "vendor:raylib"
+Command_Kind :: enum {
+	None,
+	Place_Tower,
+}
+
+Command :: struct {
+	kind: Command_Kind,
+	gx:   int,
+	gy:   int,
+}
+
+gather_commands :: proc(world: ^World) -> Command {
+	if rl.IsMouseButtonPressed(.LEFT) {
+		mouse := rl.GetMousePosition()
+		gx, gy := screen_to_grid(mouse.x, mouse.y)
+		return Command{kind = .Place_Tower, gx = gx, gy = gy}
+	}
+
+	return Command{kind = .None}
+}
+
+execute_command :: proc(world: ^World, cmd: Command) {
+	switch cmd.kind {
+	case .None:
+	case .Place_Tower:
+		try_place_tower(world, cmd.gx, cmd.gy)
+	}
+}
+

game/map.odin

@@ -46,6 +46,11 @@ init_map :: proc(world_map: ^Map) {
 			}
 		}
 	}
-
+}
+
+can_build_at :: proc(world_map: ^Map, gx, gy: int) -> bool {
+	if gx < 0 || gx >= MAP_W do return false
+	if gy < 0 || gy >= MAP_H do return false
+	return world_map.tiles[gy][gx] == .Build
 }
 

game/render.odin

@@ -28,6 +28,10 @@ render_world :: proc(world: ^World) {
 		)
 	}
 
+	for t in world.towers {
+		rl.DrawRectangle(i32(t.position.x - 14), i32(t.position.y - 14), 28, 28, rl.BLUE)
+	}
+
 	if (world.base_health == 0) {
 		rl.DrawText("**GAME OVER**", 20, 20, 20, rl.RED)
 	}

game/tower.odin

@@ -0,0 +1,20 @@
+package game
+
+Tower :: struct {
+	position: Vec2,
+}
+
+try_place_tower :: proc(world: ^World, gx, gy: int) -> bool {
+	if !can_build_at(&world.world_map, gx, gy) do return false
+	if world.gold < TOWER_COST do return false
+
+	pos := grid_to_center(gx, gy)
+	for t in world.towers {
+		if distance(t.position, pos) < 1 do return false
+	}
+
+	world.gold -= TOWER_COST
+	append(&world.towers, Tower{position = pos})
+	return true
+}
+

game/world.odin

@@ -8,6 +8,7 @@ World :: struct {
 	world_map:   Map,
 	path:        [dynamic]Vec2,
 	enemies:     [MAX_ENEMIES]Enemy,
+	towers:      [dynamic]Tower,
 }
 
 init_world :: proc() -> World {
@@ -22,9 +23,8 @@ init_world :: proc() -> World {
 
 // update world, never draw
 update_world :: proc(world: ^World, dt: f32) {
-	if rl.IsKeyPressed(.G) {
-		world.gold += 10
-	}
+	cmd := gather_commands(world)
+	execute_command(world, cmd)
 
 	if rl.IsKeyPressed(.SPACE) {
 		spawn_group(world, 3)