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(define-module (bonnie-bee actor)
#:use-module (bonnie-bee assets)
#:use-module (bonnie-bee common)
#:use-module (chickadee audio)
#:use-module (chickadee data quadtree)
#:use-module (chickadee math rect)
#:use-module (chickadee math vector)
#:use-module (oop goops)
#:use-module (starling asset)
#:use-module (starling node)
#:use-module (starling node-2d)
#:export (<actor>
velocity
hitbox
world-hitbox
quadtree
change-velocity
direction-to
angle-to
after-move
on-collide
dead?
out-of-bounds?
<damageable>
health
points
damage
on-death
<grounded>
player
bullets
scroll-speed
spawn))
(define-class <actor> (<node-2d>)
(velocity #:getter velocity #:init-keyword #:velocity #:init-form (vec2 0.0 0.0))
(hitbox #:getter hitbox #:init-keyword #:hitbox)
(world-hitbox #:getter world-hitbox #:init-form (make-rect 0.0 0.0 0.0 0.0))
(quadtree #:accessor quadtree #:init-keyword #:quadtree))
(define-method (change-velocity (actor <actor>) dx dy)
(set-vec2! (velocity actor) dx dy))
(define-method (direction-to (actor <actor>) (other <actor>))
(let ((dir (vec2- (position other) (position actor))))
(vec2-normalize! dir)
dir))
(define-method (angle-to (actor <actor>) (other <actor>))
(let ((p1 (position actor))
(p2 (position other)))
(atan (- (vec2-y p2) (vec2-y p1))
(- (vec2-x p2) (vec2-x p1)))))
(define-method (scroll-speed (actor <actor>))
0.0)
(define-method (add-to-quadtree (actor <actor>))
(quadtree-insert! (quadtree actor) (world-hitbox actor) actor))
(define-method (remove-from-quadtree (actor <actor>))
(quadtree-delete! (quadtree actor) (world-hitbox actor) actor))
(define-method (refresh-world-hitbox (actor <actor>))
(let ((p (position actor))
(h (hitbox actor))
(wh (world-hitbox actor)))
(set-rect-x! wh (+ (vec2-x p) (rect-x h)))
(set-rect-y! wh (+ (vec2-y p) (rect-y h)))
(set-rect-width! wh (rect-width h))
(set-rect-height! wh (rect-height h))))
(define-method (on-collide a b)
#f)
(define-method (on-enter (actor <actor>))
(refresh-world-hitbox actor)
(add-to-quadtree actor))
(define-method (collision-check (actor <actor>))
(let ((p (position actor))
(r (world-hitbox actor)))
(quadtree-find
(quadtree actor) r
(lambda (other)
(and (not (eq? other actor))
(rect-intersects? r (world-hitbox other))
(on-collide actor other))))))
(define-method (after-move (actor <actor>))
#t)
(define-method (update (actor <actor>) dt)
(let ((p (position actor))
(v (velocity actor))
(scroll-speed (scroll-speed actor)))
(if (and (= (vec2-x v) 0.0)
(= (vec2-y v) 0.0)
(= scroll-speed 0.0))
(collision-check actor)
(begin
(remove-from-quadtree actor)
(set-vec2! p
(+ (vec2-x p) (vec2-x v))
(+ (vec2-y p) (vec2-y v) (- (* scroll-speed dt))))
(after-move actor)
(refresh-world-hitbox actor)
(collision-check actor)
(add-to-quadtree actor)
(dirty! actor)))))
(define-method (dead? (actor <actor>))
#f)
(define-method (dead? x)
#f)
(define %bounds
(let ((padding 16.0))
(make-rect (- padding)
(- padding)
(+ %game-width (* padding 2.0))
(+ %game-height (* padding 2.0)))))
(define-method (out-of-bounds? (actor <actor>))
(not (rect-intersects? (world-hitbox actor) %bounds)))
(define-method (out-of-bounds? x)
#f)
(define-class <damageable> ()
(health #:accessor health #:init-keyword #:health)
(points #:getter points #:init-keyword #:points))
(define-method (dead? (d <damageable>))
(= (health d) 0))
(define-method (damage (d <damageable>) x)
(set! (health d) (max (- (health d) x) 0))
(unless (dead? d)
(audio-play (asset-ref enemy-hit-sound) #:volume 0.25)))
(define-method (on-death (d <damageable>))
#t)
(define-class <grounded> ())
(define-method (scroll-speed (g <grounded>))
(scroll-speed (parent g)))
(define-generic player)
(define-generic bullets)
(define-generic spawn)
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