Py5Shape.normal()

Py5Shape.normal()#

Sets the current normal vector for a Py5Shape object’s vertices.

Examples#

example picture for normal()

def setup():
    py5.size(100, 100, py5.P3D)
    py5.background(0)
    py5.directional_light(255, 255, 255, -1, -1, -1)

    s1 = py5.create_shape()
    s1.begin_shape()
    s1.fill(200, 200, 200)
    s1.vertex(-20, -20, -25)
    s1.vertex(20, -20, -25)
    s1.vertex(20, 20, -25)
    s1.vertex(-20, 20, -25)
    s1.end_shape(py5.CLOSE)

    s2 = py5.create_shape()
    s2.begin_shape()
    s2.fill(200, 200, 200)
    s2.normal(-20, -20, 20)
    s2.vertex(-20, -20, -25)
    s2.normal(20, -20, 20)
    s2.vertex(20, -20, -25)
    s2.normal(20, 20, 20)
    s2.vertex(20, 20, -25)
    s2.normal(-20, 20, 20)
    s2.vertex(-20, 20, -25)
    s2.end_shape(py5.CLOSE)

    py5.shape(s1, 40, 10)
    py5.shape(s2, 40, 60)

Description#

Sets the current normal vector for a Py5Shape object’s vertices. Used for drawing three dimensional shapes and surfaces, normal() specifies a vector perpendicular to a shape’s surface which, in turn, determines how lighting affects it. Py5 attempts to automatically assign normals to shapes, but since that’s imperfect, this is a better option when you want more control.

This method can only be used within a Py5Shape.begin_shape() and Py5Shape.end_shape() pair. The normal setting will be applied to vertices added after the call to this method.

Underlying Processing method: PShape.normal

Signatures#

normal(
    nx: float,  # x direction
    ny: float,  # y direction
    nz: float,  # z direction
    /,
) -> None

Updated on March 06, 2023 02:49:26am UTC

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