Py5Graphics.begin_shape()

Using the begin_shape() and Py5Graphics.end_shape() functions allow creating more complex forms.

Examples

example picture for begin_shape()
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def setup():
    py5.size(100, 100, py5.P2D)

    g = py5.create_graphics(60, 60, py5.P2D)
    with g.begin_draw():
        with g.begin_shape():
            g.no_fill()
            g.stroke_weight(5)
            g.vertex(10, 10)
            g.vertex(50, 10)
            g.vertex(50, 50)
            g.vertex(10, 50)

    py5.image(g, 0, 0)
    py5.image(g, 25, 25)

Description

Using the begin_shape() and Py5Graphics.end_shape() functions allow creating more complex forms. begin_shape() begins recording vertices for a shape and Py5Graphics.end_shape() stops recording. The value of the kind parameter tells it which types of shapes to create from the provided vertices. With no mode specified, the shape can be any irregular polygon. The parameters available for begin_shape() are POINTS, LINES, TRIANGLES, TRIANGLE_FAN, TRIANGLE_STRIP, QUADS, and QUAD_STRIP. After calling the begin_shape() function, a series of Py5Graphics.vertex() commands must follow. To stop drawing the shape, call Py5Graphics.end_shape(). The Py5Graphics.vertex() function with two parameters specifies a position in 2D and the Py5Graphics.vertex() function with three parameters specifies a position in 3D. Each shape will be outlined with the current stroke color and filled with the fill color.

Transformations such as Py5Graphics.translate(), Py5Graphics.rotate(), and Py5Graphics.scale() do not work within begin_shape(). It is also not possible to use other shapes, such as Py5Graphics.ellipse() or Py5Graphics.rect() within begin_shape().

The P2D and P3D renderers allow Py5Graphics.stroke() and Py5Graphics.fill() to be altered on a per-vertex basis, but the default renderer does not. Settings such as Py5Graphics.stroke_weight(), Py5Graphics.stroke_cap(), and Py5Graphics.stroke_join() cannot be changed while inside a begin_shape() & Py5Graphics.end_shape() block with any renderer.

This method can be used as a context manager to ensure that Py5Graphics.end_shape() always gets called, as shown in the example. Use Py5Graphics.begin_closed_shape() to create a context manager that will pass the CLOSE parameter to end_shape(), closing the shape.

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

Underlying Java method: PGraphics.beginShape

Syntax

begin_shape() -> None
begin_shape(kind: int, /) -> None

Parameters

  • kind: int - Either POINTS, LINES, TRIANGLES, TRIANGLE_FAN, TRIANGLE_STRIP, QUADS, or QUAD_STRIP

Updated on October 29, 2021 22:01:43pm UTC