84 lines
1.7 KiB
Odin
84 lines
1.7 KiB
Odin
package game
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Tower :: struct {
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position: Vec2,
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kind: Tower_Kind,
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cooldown: f32,
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}
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Tower_Kind :: enum {
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Archer,
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}
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Tower_Archetype :: struct {
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kind: Tower_Kind,
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range: f32,
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damage: int,
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fire_rate: f32,
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cost: int,
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}
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TOWER_ARCHETYPES: [Tower_Kind]Tower_Archetype = {
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.Archer = {kind = .Archer, range = 95, damage = 12, fire_rate = 0.45, cost = TOWER_COST},
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}
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get_archetype :: proc(kind: Tower_Kind) -> Tower_Archetype {
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return TOWER_ARCHETYPES[kind]
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}
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try_place_tower :: proc(world: ^World, gx, gy: int, kind: Tower_Kind) -> bool {
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arch := get_archetype(kind)
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if !can_build_at(&world.world_map, gx, gy) do return false
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if world.gold < TOWER_COST do return false
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pos := grid_to_center(gx, gy)
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for t in world.towers {
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if distance(t.position, pos) < 1 do return false
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}
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world.gold -= arch.cost
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append(&world.towers, Tower{position = pos, kind = kind, cooldown = 0})
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return true
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}
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find_target :: proc(tower: Tower, world: ^World) -> ^Enemy {
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arch := get_archetype(tower.kind)
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best: ^Enemy = nil
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best_dist: f32 = 999999
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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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d := distance(tower.position, e.position)
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if d <= arch.range && d < best_dist {
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best = e
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best_dist = d
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}
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}
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return best
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}
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update_towers :: proc(world: ^World, dt: f32) {
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for i in 0 ..< len(world.towers) {
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t := &world.towers[i]
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t.cooldown -= dt
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if t.cooldown > 0 do continue
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target := find_target(t^, world)
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if target == nil do continue
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arch := get_archetype(t.kind)
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target.health -= arch.damage
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t.cooldown = arch.fire_rate
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if target.health <= 0 {
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target.active = false
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push_event(world, .Enemy_Killed, gold_reward = 5)
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}
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}
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}
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