Reference Color

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

validate color
from wgpu.gui.auto import WgpuCanvas, run
import pygfx as gfx

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

canvas = WgpuCanvas()
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__)
    run()

Total running time of the script: (0 minutes 0.249 seconds)

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