Explore a Simple Bouncing Square

This example combines application setup, object spawning, colors, and delta-time movement.

import grafyte

window_size = (640, 320)
size = 20

app = grafyte.Application("Bouncing Square", window_size)
scene = app.make_new_scene()
app.background_color = (30, 120, 30)

square = scene.spawn_object((0, 0), (size, size))
square.color = (255, 0, 0)

velocity = [65.0, 50.0]

half_h = 100.0
aspect = window_size[0] / window_size[1]
half_w = half_h * aspect

while not app.should_close():
    square.pos += (velocity[0] * app.dt, velocity[1] * app.dt)

    if not (-half_w + size / 2) <= square.pos.x <= (half_w - size / 2):
        velocity[0] = -velocity[0]
    if not (-half_h + size / 2) <= square.pos.y <= (half_h - size / 2):
        velocity[1] = -velocity[1]

    app.render()

app.quit()

What this example shows:

• Application owns the window and timing.

• Scene owns the square object.

• square.pos += (...) updates the object each frame.

• app.dt keeps movement frame-rate independent.