Reference Color

This example draws squares of reference colors. These can be compared to similar output from e.g. Matplotlib.

from rendercanvas.auto import RenderCanvas, loop
import pygfx as gfx

colors1 = ["#ff0000", "#770000", "#00ff00", "#007700", "#0000ff", "#000077"]
colors2 = ["#000000", "#333333", "#666666", "#999999", "#cccccc", "#ffffff"]

canvas = RenderCanvas()
renderer = gfx.WgpuRenderer(canvas, gamma_correction=1.0)
camera = gfx.OrthographicCamera()
camera.show_rect(-0.5, 5.5, 0, 2)
scene = gfx.Scene()

plane = gfx.plane_geometry()
for i, color in enumerate(colors1):
    m = gfx.Mesh(plane, gfx.MeshBasicMaterial(color=color))
    m.local.x = i
    m.local.y = 0
    scene.add(m)
for i, color in enumerate(colors2):
    m = gfx.Mesh(plane, gfx.MeshBasicMaterial(color=color))
    m.local.x = i
    m.local.y = 1
    scene.add(m)

canvas.request_draw(lambda: renderer.render(scene, camera))


# # Code to show the same scene in MPL
# import matplotlib.pyplot as plt
# from matplotlib.patches import Rectangle
# fig, ax = plt.subplots()
# ax.set_facecolor("k")
# plt.xlim([0, 6])
# plt.ylim([-1, 3])
# for i, color in enumerate(colors1):
#     ax.add_patch(Rectangle((i, 0), 1, 1, facecolor=color))
# for i, color in enumerate(colors2):
#     ax.add_patch(Rectangle((i, 1), 1, 1, facecolor=color))
# fig.show()


if __name__ == "__main__":
    print(__doc__)
    loop.run()