Function _setup_rect

gui_utils/gl_utils.py:394–400

(rx, ry)

@functools.lru_cache(maxsize=10000)
def _setup_rect(rx, ry):
    t = np.linspace(0, np.pi / 2, 1 if max(rx, ry) == 0 else 64)
    s = 1 - np.sin(t); c = 1 - np.cos(t)
    x = [c * rx, 1 - s * rx, 1 - c * rx, s * rx]
    y = [s * ry, c * ry, 1 - s * ry, 1 - c * ry]
    v = np.stack([x, y], axis=-1).reshape(-1, 2)
    return v.astype('float32')

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