render_frame()

Helper function to render a single frame using the passed draw function argument.

Examples

def draw_message(s: py5.Sketch):
    s.background(255)
    s.fill(255, 0, 0)
    s.text_size(20)
    s.text_align(s.CENTER, s.CENTER)
    s.text('hello world', s.width/2, s.height/2)

frame = py5.render_frame(draw_message, 400, 200)

def draw_message(s: py5.Sketch, message='hello world', color=(255, 0, 0)):
    s.background(255)
    s.fill(*color)
    s.text_size(20)
    s.text_align(s.CENTER, s.CENTER)
    s.text(message, s.width/2, s.height/2)

frame = py5.render_frame(draw_message, 400, 200, py5.P2D,
                         draw_args=('I LIKE ORANGE THINGS',),
                         draw_kwargs=dict(color=(255, 128, 0)))

def random_squares(g: py5.Py5Graphics):
    for _ in range(10):
        g.rect(np.random.randint(g.width), np.random.randint(g.height), 10, 10)

frame = py5.render_frame(random_squares, 100, 100, use_py5graphics=True)

Description

Helper function to render a single frame using the passed draw function argument. The output is returned as a PIL.Image object.

The passed function’s first parameter must be either a py5.Sketch object or a py5.Py5Graphics object, depending on the parameter use_py5graphics. That object must be used for all of the function’s py5 commands. The function can have additional positional and keyword arguments. To use them, pass the desired values as render_frame’s draw_args and draw_kwargs arguments.

On macOS, only the default renderer is currently supported. Other platforms support the default renderer and the OpenGL renderers (P2D and P3D).

The rendered frame can have transparent pixels if and only if the use_py5graphics parameter is True because only a py5.Py5Graphics object can create an image with transparency. There is no need to call Py5Graphics.begin_draw() or Py5Graphics.end_draw() in the passed function as render_frame() does that for you.

This function facilitates the creation and execution of a py5 Sketch, and as a result makes it easy to run a Sketch inside of another Sketch. This is discouraged, and may fail catastrophically.

This function is available in decorator form as @render().

Signatures

render_frame(
    draw: Callable,  # function that executes py5 draw commands
    width: int,  # width of the display window in units of pixels
    height: int,  # height of the display window in units of pixels
    renderer: str = Sketch.HIDDEN,  # rendering engine to use
    *,
    draw_args: tuple = None,  # additional positional arguments to pass to draw function
    draw_kwargs: dict = None,  # additional keyword arguments to pass to draw function
    use_py5graphics: bool = False  # pass a py5graphics object instead of a sketch object
) -> Image

Updated on December 27, 2023 13:47:02pm UTC