Shape Visuals

Demonstration of PolygonVisual, EllipseVisual, RectangleVisual and RegularPolygon

from vispy import app
import sys
from vispy.scene import SceneCanvas
from vispy.scene.visuals import Polygon, Ellipse, Rectangle, RegularPolygon
from vispy.color import Color

white = Color("#ecf0f1")
gray = Color("#121212")
red = Color("#e74c3c")
blue = Color("#2980b9")
orange = Color("#e88834")

canvas = SceneCanvas(keys='interactive', title='Polygon Example',
                     show=True)
v = canvas.central_widget.add_view()
v.bgcolor = gray
v.camera = 'panzoom'

cx, cy = (0.2, 0.2)
halfx, halfy = (0.1, 0.1)

poly_coords = [(cx - halfx, cy - halfy),
               (cx + halfx, cy - halfy),
               (cx + halfx, cy + halfy),
               (cx - halfx, cy + halfy)]
poly = Polygon(poly_coords, color=red, border_color=white,
               border_width=3, parent=v.scene)

ellipse = Ellipse(center=(0.4, 0.2), radius=(0.1, 0.05),
                  color=blue, border_width=2, border_color=white,
                  num_segments=1,
                  parent=v.scene)

ellipse.num_segments = 10
ellipse.start_angle = 0
ellipse.span_angle = 120

rect = Rectangle(center=(0.6, 0.2), width=0.1, height=0.2,
                 color=orange, border_color=white,
                 radius=0.02, parent=v.scene)

regular_poly = RegularPolygon(center=(0.8, 0.2),
                              radius=0.1, sides=6, color=blue,
                              border_color=white, border_width=2,
                              parent=v.scene)
if __name__ == '__main__':
    if sys.flags.interactive != 1:
        app.run()