Polygon#

[1]:

import fresnel
scene = fresnel.Scene()

The polygon geometry defines a set of N simple polygons in two dimensions. All polygons in the geometry have the same vertices. Each polygon has a separate position, orientation angle, and color.

[2]:

geometry = fresnel.geometry.Polygon(scene,
                                    N=2,
                                    vertices = [[0, -1], [1, 1],
                                                [0, 0.5], [-1, 1]])
geometry.material.color = fresnel.color.linear([0.20,0.64,0.58])
geometry.material.solid=1

Geometric properties#

position defines the position of each polygon in the z=0 plane.

[3]:

geometry.position[:] = [[-1,0],
                        [1, 0]]

angle defines the rotation angle of each polygon

[4]:

geometry.angle[:] = [0.1, -1.0]

[5]:

scene.camera = fresnel.camera.Orthographic.fit(scene)
fresnel.preview(scene)

[5]:

../../_images/examples_01-Primitives_04-Polygon-geometry_8_0.png

Color#

color sets the color of each polygon (when primitive_color_mix > 0).

[6]:

geometry.color[:] = [fresnel.color.linear([0.02,0.23,0.42]),
                     fresnel.color.linear([0.38,0.84,0.98])];
geometry.material.primitive_color_mix = 1.0

[7]:

fresnel.preview(scene)

[7]:

../../_images/examples_01-Primitives_04-Polygon-geometry_11_0.png

Outlines#

Outlines are applied inside the outer edge of the polygon in the z=0 plane.

[8]:

geometry.outline_width = 0.05

[9]:

fresnel.preview(scene)

[9]:

../../_images/examples_01-Primitives_04-Polygon-geometry_14_0.png

Rounded polygons#

Specify rounding_radius to round the edges of the polygon.

[10]:

scene2 = fresnel.Scene()
geometry2 = fresnel.geometry.Polygon(scene2,
                                     rounding_radius=0.3,
                                     N=1,
                                     vertices = [[-1, -1], [1, -1],
                                                 [1, 1], [-1, 1]],
                                     outline_width=0.1)
geometry2.material.color=fresnel.color.linear([0.56,0.03,0.28])
geometry2.material.solid=1
scene2.camera = fresnel.camera.Orthographic.fit(scene2)

[11]:

fresnel.preview(scene2)

[11]:

../../_images/examples_01-Primitives_04-Polygon-geometry_17_0.png

This page was generated from a jupyter notebook. You can download and run the notebook locally from the fresnel-examples repository.