Py5Graphics.begin_raw()

To create vectors from 3D data, use the begin_raw() and Py5Graphics.end_raw() commands.

Examples

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
def setup():
    py5.size(200, 200, py5.P2D)

    g = py5.create_graphics(100, 100, py5.P2D)
    g2 = py5.create_graphics(100, 100, py5.SVG, "/tmp/raw2.svg")

    with g.begin_draw():
        with g.begin_raw(g2):
            g.rect_mode(py5.CENTER)
            g.fill("#F00")
            for _ in range(10):
                g.square(py5.random(g.width), py5.random(g.height), 10)

    py5.image(g, 10, 10)
    py5.image(g, 100, 100)

Description

To create vectors from 3D data, use the begin_raw() and Py5Graphics.end_raw() commands. These commands will grab the shape data just before it is rendered to the Py5Graphics object. At this stage, the Py5Graphics object contains nothing but a long list of individual lines and triangles. This means that a shape created with Py5Graphics.sphere() function will be made up of hundreds of triangles, rather than a single object. Or that a multi-segment line shape (such as a curve) will be rendered as individual segments.

When using begin_raw() and Py5Graphics.end_raw(), it’s possible to write to either a 2D or 3D renderer. For instance, begin_raw() with the PDF library will write the geometry as flattened triangles and lines, even if recording from the P3D renderer.

If you want a background to show up in your files, use rect(0, 0, width, height) after setting the Py5Graphics.fill() to the background color. Otherwise the background will not be rendered to the file because the background is not a shape.

This method can be used as a context manager to ensure that Py5Graphics.end_raw() always gets called, as shown in the example.

Using hint(ENABLE_DEPTH_SORT) can improve the appearance of 3D geometry drawn to 2D file formats.

This method is the same as begin_raw() but linked to a Py5Graphics object. To see example code for how it can be used, see begin_raw().

Underlying Java method: PGraphics.beginRaw

Syntax

begin_raw(raw_graphics: Py5Graphics, /) -> None

Parameters

  • raw_graphics: Py5Graphics - Py5Graphics object to apply draw commands to

Updated on September 25, 2021 10:33:52am UTC