splash damage

game/projectile.odin

@@ -3,13 +3,14 @@ package game
 import rl "vendor:raylib"
 
 Projectile :: struct {
-	active:      bool,
-	position:    Vec2,
-	target_slot: int,
-	damage:      int,
-	speed:       f32,
-	mode:        Projectile_Mode,
-	direction:   Vec2,
+	active:        bool,
+	position:      Vec2,
+	target_slot:   int,
+	damage:        int,
+	speed:         f32,
+	mode:          Projectile_Mode,
+	direction:     Vec2,
+	splash_radius: f32,
 }
 
 Projectile_Mode :: enum {
@@ -42,24 +43,26 @@ spawn_projectile :: proc(world: ^World, from: Vec2, target_slot: int, damage: in
 
 	p.mode = .Homing
 	p^ = Projectile {
-		active      = true,
-		position    = from,
-		target_slot = target_slot,
-		damage      = damage,
-		speed       = PROJECTILE_SPEED,
+		active        = true,
+		position      = from,
+		target_slot   = target_slot,
+		damage        = damage,
+		speed         = PROJECTILE_SPEED,
+		splash_radius = 0,
 	}
 }
 
-spawn_ballistic :: proc(world: ^World, from, dir: Vec2, damage: int) {
+spawn_ballistic :: proc(world: ^World, from, dir: Vec2, damage: int, splash: f32) {
 	p := acquire_projectile(world)
 	if p == nil do return
 	p^ = Projectile {
-		active    = true,
-		position  = from,
-		direction = dir,
-		mode      = .Ballistic,
-		damage    = damage,
-		speed     = CANNON_PROJECTILES_SPEED,
+		active        = true,
+		position      = from,
+		direction     = dir,
+		mode          = .Ballistic,
+		damage        = damage,
+		speed         = CANNON_PROJECTILES_SPEED,
+		splash_radius = splash,
 	}
 }
 
@@ -114,7 +117,7 @@ update_ballistic_projectile :: proc(world: ^World, p: ^Projectile, dt: f32) {
 	p.position.x += p.direction.x * step
 	p.position.y += p.direction.y * step
 
-	if hit_enemy_at(world, p.position, p.damage) {
+	if apply_splash_damage(world, p.position, p.damage, p.splash_radius) {
 		p.active = false
 		return
 	}
@@ -141,3 +144,19 @@ render_projectiles :: proc(world: ^World) {
 	}
 }
 
+apply_splash_damage :: proc(world: ^World, center: Vec2, damage: int, radius: f32) -> bool {
+	if radius <= 0 do return hit_enemy_at(world, center, damage)
+
+	hit_any := false
+	for i in 0 ..< MAX_ENEMIES {
+		e := &world.enemies[i]
+		if !e.active do continue
+		if distance(center, e.position) <= radius {
+			apply_tower_hit(world, e, damage)
+			hit_any = true
+		}
+	}
+
+	return hit_any
+}
+

game/tower.odin

@@ -30,6 +30,7 @@ Tower_Archetype :: struct {
 	upgrade_cost:     int,
 	damage_per_level: int,
 	range_per_level:  f32,
+	splash_radius:    f32,
 }
 
 TOWER_ARCHETYPES: [Tower_Kind]Tower_Archetype = {
@@ -45,6 +46,7 @@ TOWER_ARCHETYPES: [Tower_Kind]Tower_Archetype = {
 		upgrade_cost = 40,
 		damage_per_level = 3,
 		range_per_level = 8,
+		splash_radius = 0,
 	},
 	.Cannon = {
 		kind = .Cannon,
@@ -57,6 +59,7 @@ TOWER_ARCHETYPES: [Tower_Kind]Tower_Archetype = {
 		upgrade_cost = 40,
 		damage_per_level = 3,
 		range_per_level = 8,
+		splash_radius = 60,
 	},
 	.Ice = {
 		kind = .Ice,
@@ -69,6 +72,7 @@ TOWER_ARCHETYPES: [Tower_Kind]Tower_Archetype = {
 		upgrade_cost = 40,
 		damage_per_level = 3,
 		range_per_level = 8,
+		splash_radius = 0,
 	},
 }
 
@@ -238,7 +242,7 @@ update_towers :: proc(world: ^World, dt: f32) {
 						(target.position.x - t.position.x) / len,
 						(target.position.y - t.position.y) / len,
 					}
-					spawn_ballistic(world, t.position, dir, damage)
+					spawn_ballistic(world, t.position, dir, damage, arch.splash_radius)
 				}
 			}
 		case .Ice: