.{Vec2} := @use("../../../../libraries/stn/src/lib.hb").math
render := @use("../../../../libraries/render/src/lib.hb")

/* expected result:
   a cute image bounces around the screen */

bmp_1 := @embed("./able.bmp")
bmp_2 := @embed("./mini.bmp")

example := fn(): void {
	screen := render.init(true)
	images := [render.Surface; 2].(
		render.image.surface_from_bmp(@bitcast(&bmp_1)),
		render.image.surface_from_bmp(@bitcast(&bmp_2)),
	)
	vel := Vec2(int).(1, 1)
	pos := Vec2(int).(100, 100)
	n := -1
	loop {
		image := images[n]
		render.put_surface(screen, image, pos)
		render.sync(screen)
		render.clear(screen, render.black)

		if pos.x == 0 | pos.x == screen.width - image.width {
			vel.x = -vel.x
			n = -1 - n
		}
		if pos.y == 0 | pos.y == screen.height - image.height {
			vel.y = -vel.y
			n = -1 - n
		}

		pos += vel
	}
	return
}