add ice towers - no projectiles, no button

game/commands.odin

@@ -20,6 +20,7 @@ gather_commands :: proc(world: ^World) -> Command {
 
 	if rl.IsKeyPressed(.ONE) do world.selected_tower = .Archer
 	if rl.IsKeyPressed(.TWO) do world.selected_tower = .Cannon
+	if rl.IsKeyPressed(.THREE) do world.selected_tower = .Ice
 	if world.phase == .Build && rl.IsKeyPressed(.N) {
 		return Command{kind = .Start_Wave}
 	}

game/constants.odin

@@ -38,3 +38,6 @@ CONTROLS_SHOP_IDLE :: rl.Color{45, 75, 45, 255}
 CONTROL_SHOP_SELECTED :: rl.Color{70, 110, 70, 255}
 CONTROLS_SHOP_HOVER :: rl.Color{90, 130, 90, 255}
 
+ICE_SLOW_DURATION :: 2.5
+ICE_SLOW_FACTOR :: 0.5
+

game/enemy.odin

@@ -1,6 +1,7 @@
 package game
 
 import "core:fmt"
+import "core:sys/posix"
 import rl "vendor:raylib"
 
 Enemy :: struct {
@@ -9,7 +10,8 @@ Enemy :: struct {
 	max_health: int,
 	active:     bool,
 	path_index: int,
-	speed:      f32,
+	base_speed: f32,
+	slow_timer: f32,
 }
 
 acquire_enemy :: proc(world: ^World) -> ^Enemy {
@@ -33,7 +35,8 @@ spawn_enemy :: proc(world: ^World, health: int, speed: f32) {
 		position   = world.path[0],
 		health     = health,
 		max_health = health,
-		speed      = speed,
+		base_speed = speed,
+		slow_timer = 0,
 		path_index = 1,
 		active     = true,
 	}
@@ -59,7 +62,12 @@ update_enemies :: proc(world: ^World, dt: f32) {
 		}
 
 		target := world.path[e.path_index]
-		move_toward(&e.position, target, e.speed, dt)
+		move_speed := e.base_speed
+		if e.slow_timer > 0 {
+			move_speed *= ICE_SLOW_FACTOR
+			e.slow_timer -= dt
+		}
+		move_toward(&e.position, target, move_speed, dt)
 
 		dx := target.x - e.position.x
 		dy := target.y - e.position.y
@@ -83,6 +91,9 @@ render_enemies :: proc(world: ^World) {
 		e := world.enemies[i]
 		if !e.active do continue
 		rl.DrawCircle(i32(e.position.x), i32(e.position.y), 11, rl.MAROON)
+		if e.slow_timer > 0 {
+			rl.DrawCircleLines(i32(e.position.x), i32(e.position.y), 14, rl.SKYBLUE)
+		}
 		rl.DrawText(
 			fmt.ctprintf("%d", e.health),
 			i32(e.position.x) - 4,

game/tower.odin

@@ -13,6 +13,7 @@ Tower :: struct {
 Tower_Kind :: enum {
 	Archer,
 	Cannon,
+	Ice,
 }
 
 Tower_Archetype :: struct {
@@ -44,6 +45,15 @@ TOWER_ARCHETYPES: [Tower_Kind]Tower_Archetype = {
 		footprint_w = 2,
 		footprint_h = 2,
 	},
+	.Ice = {
+		kind = .Ice,
+		range = 85,
+		damage = 6,
+		fire_rate = 0.55,
+		cost = 65,
+		footprint_w = 1,
+		footprint_h = 1,
+	},
 }
 
 rects_overlap :: proc(
@@ -166,6 +176,10 @@ update_towers :: proc(world: ^World, dt: f32) {
 			if target := enemy_at_slot(world, slot); target != nil {
 				apply_tower_hit(world, target, arch.damage)
 			}
+		case .Ice:
+			if target := enemy_at_slot(world, slot); target != nil {
+				apply_ice_hit(world, target, arch.damage)
+			}
 		}
 		t.cooldown = arch.fire_rate
 	}
@@ -179,6 +193,11 @@ apply_tower_hit :: proc(world: ^World, target: ^Enemy, damage: int) {
 	}
 }
 
+apply_ice_hit :: proc(world: ^World, target: ^Enemy, damage: int) {
+	apply_tower_hit(world, target, damage)
+	if target.active do target.slow_timer = ICE_SLOW_DURATION
+}
+
 enemy_at_slot :: proc(world: ^World, slot: int) -> ^Enemy {
 	if slot < 0 || slot >= MAX_ENEMIES do return nil