create_graphics()

Creates and returns a new Py5Graphics object.

Examples

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def setup():
    py5.size(200, 200)
    global pg
    pg = py5.create_graphics(100, 100)


def draw():
    pg.begin_draw()
    pg.background(102)
    pg.stroke(255)
    pg.line(pg.width*0.5, pg.height*0.5, py5.mouse_x, py5.mouse_y)
    pg.end_draw()
    py5.image(pg, 50, 50)

Description

Creates and returns a new Py5Graphics object. Use this class if you need to draw into an off-screen graphics buffer. The first two parameters define the width and height in pixels. The third, optional parameter specifies the renderer. It can be defined as P2D, P3D, PDF, or SVG. If the third parameter isn’t used, the default renderer is set. The PDF and SVG renderers require the filename parameter.

It’s important to consider the renderer used with create_graphics() in relation to the main renderer specified in size(). For example, it’s only possible to use P2D or P3D with create_graphics() when one of them is defined in size(). P2D and P3D use OpenGL for drawing, and when using an OpenGL renderer it’s necessary for the main drawing surface to be OpenGL-based. If P2D or P3D are used as the renderer in size(), then any of the options can be used with create_graphics(). If the default renderer is used in size(), then only the default, PDF, or SVG can be used with create_graphics().

It’s important to run all drawing functions between the Py5Graphics.begin_draw() and Py5Graphics.end_draw(). As the exception to this rule, smooth() should be run on the Py5Graphics object before Py5Graphics.begin_draw(). See the reference for smooth() for more detail.

The create_graphics() function should almost never be used inside draw() because of the memory and time needed to set up the graphics. One-time or occasional use during draw() might be acceptable, but code that calls create_graphics() at 60 frames per second might run out of memory or freeze your Sketch.

Unlike the main drawing surface which is completely opaque, surfaces created with create_graphics() can have transparency. This makes it possible to draw into a graphics and maintain the alpha channel. By using save() to write a PNG or TGA file, the transparency of the graphics object will be honored.

Underlying Java method: createGraphics

Syntax

create_graphics(w: int, h: int, /) -> Py5Graphics
create_graphics(w: int, h: int, renderer: str, /) -> Py5Graphics
create_graphics(w: int, h: int, renderer: str, path: str, /) -> Py5Graphics

Parameters

  • h: int - height in pixels

  • path: str - the name of the file (can be an absolute or relative path)

  • renderer: str - Either P2D, P3D, or PDF

  • w: int - width in pixels

Updated on September 11, 2021 16:51:34pm UTC