Note
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Image with Points Overlaid
Show an image with points overlaid.
import imageio.v3 as iio
from wgpu.gui.auto import WgpuCanvas, run
import pygfx as gfx
import numpy as np
canvas = WgpuCanvas()
renderer = gfx.renderers.WgpuRenderer(canvas)
scene = gfx.Scene()
# add image
im = iio.imread("imageio:astronaut.png")
image = gfx.Image(
gfx.Geometry(grid=gfx.Texture(im, dim=2)),
gfx.ImageBasicMaterial(clim=(0, 255)),
)
scene.add(image)
# add points
xx = [182, 180, 161, 153, 191, 237, 293, 300, 272, 267, 254]
yy = [145, 131, 112, 59, 29, 14, 48, 91, 136, 137, 172]
sizes = np.arange(1, len(xx) + 1, dtype=np.float32)
points = gfx.Points(
gfx.Geometry(
positions=[(x, y, 1) for x, y in zip(xx, yy)],
sizes=sizes,
),
gfx.PointsMaterial(
color=(0, 1, 1, 1),
size=10,
size_space="world",
size_mode="vertex",
),
)
scene.add(points)
camera = gfx.PerspectiveCamera(0)
camera.local.scale_y = -1
camera.show_rect(-10, 522, -10, 522)
controller = gfx.PanZoomController(camera, register_events=renderer)
if __name__ == "__main__":
canvas.request_draw(lambda: renderer.render(scene, camera))
run()
Total running time of the script: (0 minutes 0.603 seconds)