1 files changed, 94 insertions, 0 deletions
diff --git a/src/bullet.odin b/src/bullet.odin
new file mode 100644
index 0000000..b26cc14
--- /dev/null
+++ b/src/bullet.odin
@@ -0,0 +1,94 @@
+package demonchime
+
+import "core:math"
+import "core:log"
+
+import "phys"
+
+Bullet :: struct {
+  handle: Entity_Handle,
+  body_handle: phys.Body_Handle,
+  sprite: Sprite,
+  lifetime: f32,
+}
+
+make_bullet :: proc(
+  pos: Vec2,
+  vel: Vec2,
+  lifetime: f32 = 5,
+  image_id := Image_Id.BULLET,
+  layers: bit_set[phys.Layer;u16] = {.PLAYER_PROJECTILE},
+  mask: bit_set[phys.Layer;u16] = {.DEFAULT},
+) -> (Entity_Handle, ^Bullet) {
+  sprite: Sprite
+  init_sprite(&sprite, image_id)
+
+  sprite.offset = {
+    math.round(f32(sprite.width) * 0.5),
+    math.round(f32(sprite.height) * 0.5),
+  }
+  sprite.rotation = math.atan2(vel.y, vel.x) * math.DEG_PER_RAD
+  sprite.pos = pos
+
+  body_rect := phys.Rect{
+    start = {-3, -3},
+    size = {6, 6},
+  }
+  body_handle, body := phys.make_body(body_rect, layers, mask)
+
+  body.vel = vel
+
+  phys.set_body_position(body_handle, pos)
+
+  return make_entity(&state.bullet_list, Bullet{
+    body_handle = body_handle,
+    sprite = sprite,
+    lifetime = lifetime,
+  })
+}
+
+delete_bullet :: proc(bullet_handle: Entity_Handle) {
+  bullet := get_entity(state.bullet_list, bullet_handle)
+
+  phys.remove_body(bullet.body_handle)
+  delete_entity(&state.platform_list, bullet.handle)
+}
+
+update_bullets :: proc(dt: f32) {
+  iter := iter_entity_list(state.bullet_list)
+  for bullet in entity_list_iter(&iter) {
+    bullet.lifetime -= dt
+
+    phys.update_body(bullet.body_handle)
+    body := phys.get_body(bullet.body_handle)
+
+    if body.collisions != {} || bullet.lifetime < 0 {
+      delete_entity(&state.bullet_list, bullet.handle)
+    }
+
+    bullet.sprite.pos = body.pos
+  }
+}
+
+draw_bullets :: proc() {
+  iter := iter_entity_list(state.bullet_list)
+  for bullet in entity_list_iter(&iter) {
+    draw_sprite(bullet.sprite)
+
+    body := phys.get_body(bullet.body_handle)
+    rect := body.rect
+    rect.start += body.pos
+    draw_rect(transmute(Rect)rect)
+  }
+}
+
+clear_bullets :: proc() {
+  iter := iter_entity_list(state.bullet_list)
+  for bullet in entity_list_iter(&iter) {
+    delete_bullet(bullet.handle)
+  }
+}
+
+on_room_open_bullets :: proc(room_id: Room_Id) {
+  clear_bullets()
+}