78 lines
1.5 KiB
Odin
78 lines
1.5 KiB
Odin
package game
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Enemy :: struct {
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position: Vec2,
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health: int,
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max_health: int,
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active: bool,
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path_index: int,
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speed: f32,
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}
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acquire_enemy :: proc(world: ^World) -> ^Enemy {
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// create an object pool with fixed slots to reuse instead of allocate/free every spawn
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for i in 0 ..< MAX_ENEMIES {
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if !world.enemies[i].active {
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return &world.enemies[i]
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}
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}
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return nil
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}
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spawn_enemy :: proc(world: ^World, health: int, speed: f32) {
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if len(world.path) == 0 do return // don't spawn enemies if no paths exist
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e := acquire_enemy(world) // grab a free slot
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if e == nil do return // if there are no slots, skil spawning
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e^ = Enemy {
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position = world.path[0],
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health = health,
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max_health = health,
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speed = speed,
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path_index = 1,
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active = true,
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}
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}
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spawn_group :: proc(world: ^World, count: int) {
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for _ in 0 ..< count {
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spawn_enemy(world, 20, 60)
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}
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}
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update_enemies :: proc(world: ^World, dt: f32) {
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for i in 0 ..< MAX_ENEMIES {
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e := &world.enemies[i]
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if !e.active do continue
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if len(world.path) == 2 do return
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if e.path_index >= len(world.path) {
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world.base_health -= 1
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e.active = false
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continue
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}
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target := world.path[e.path_index]
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move_toward(&e.position, target, e.speed, dt)
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dx := target.x - e.position.x
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dy := target.y - e.position.y
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if dx * dx + dy * dy < 16.0 {
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e.path_index += 1
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}
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}
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}
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active_enemy_count :: proc(world: ^World) -> int {
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count := 0
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for i in 0 ..< MAX_ENEMIES {
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if world.enemies[i].active do count += 1
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}
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return count
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}
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