add cannon - no projectiles, no control button

game/tower.odin

@@ -12,6 +12,7 @@ Tower :: struct {
 
 Tower_Kind :: enum {
 	Archer,
+	Cannon,
 }
 
 Tower_Archetype :: struct {
@@ -34,6 +35,15 @@ TOWER_ARCHETYPES: [Tower_Kind]Tower_Archetype = {
 		footprint_w = 1,
 		footprint_h = 2,
 	},
+	.Cannon = {
+		kind = .Cannon,
+		range = 110,
+		damage = 35,
+		fire_rate = 1.2,
+		cost = 80,
+		footprint_w = 2,
+		footprint_h = 2,
+	},
 }
 
 rects_overlap :: proc(
@@ -152,22 +162,44 @@ update_towers :: proc(world: ^World, dt: f32) {
 		switch t.kind {
 		case .Archer:
 			spawn_projectile(world, t.position, slot, arch.damage)
-			t.cooldown = arch.fire_rate
+		case .Cannon:
+			if target := enemy_at_slot(world, slot); target != nil {
+				apply_tower_hit(world, target, arch.damage)
+			}
 		}
+		t.cooldown = arch.fire_rate
 	}
 }
 
+apply_tower_hit :: proc(world: ^World, target: ^Enemy, damage: int) {
+	target.health -= damage
+	if target.health <= 0 {
+		target.active = false
+		push_event(world, .Enemy_Killed, gold_reward = 5)
+	}
+}
+
+enemy_at_slot :: proc(world: ^World, slot: int) -> ^Enemy {
+	if slot < 0 || slot >= MAX_ENEMIES do return nil
+
+	e := &world.enemies[slot]
+	if !e.active do return nil
+	return e
+}
+
 render_towers :: proc(world: ^World) {
 	for t in world.towers {
 		archetype := get_archetype(t.kind)
 		pixel_width := f32(archetype.footprint_w * TILE_SIZE)
 		pixel_height := f32(archetype.footprint_h * TILE_SIZE)
+		color := rl.Color{255, 203, 0, 255}
+		if t.kind == .Cannon do color = rl.DARKGRAY
 		rl.DrawRectangle(
 			i32(t.position.x - pixel_width * 0.5),
 			i32(t.position.y - pixel_height * 0.5),
 			i32(pixel_width),
 			i32(pixel_height),
-			rl.Color{255, 203, 0, 255},
+			color,
 		)
 	}
 }