Text anchor

This example shows texts with different anchors, so the text can be aligned in the scene.

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


renderer = gfx.renderers.WgpuRenderer(WgpuCanvas(size=(500, 500)))
scene = gfx.Scene()


def add_text(anchor, pos):
    obj = gfx.Text(
        gfx.TextGeometry(text=anchor, anchor=anchor, font_size=20, screen_space=True),
        gfx.TextMaterial(color="#0f0"),
    )
    obj.local.position = pos
    scene.add(obj)


line_positions = [(0, -1), (0, 1), (-1, 0), (1, 0)]
line_positions += [(-1, -1), (1, -1), (-1, 1), (1, 1)]
line_positions += [(-1, -1), (-1, 1), (1, -1), (1, 1)]
line = gfx.Line(
    gfx.Geometry(positions=[(p[0] * 50, p[1] * 50, -1) for p in line_positions]),
    gfx.LineSegmentMaterial(color="#00f"),
)
scene.add(line)

add_text("Baseline-center", (0, 0, 0))
add_text("Bottom-Left", (-50, -50, 0))
add_text("Bottom-Right", (50, -50, 0))
add_text("Top-Left", (-50, 50, 0))
add_text("Top-Right", (50, 50, 0))
add_text(" Middle-Left", (-50, 0, 0))  # Note the space for extra margin
add_text("Middle-Right ", (50, 0, 0))  # Note the space for extra margin
add_text("Bottom-Center", (0, -50, 0))
add_text("Top-Center", (0, 50, 0))

camera = gfx.OrthographicCamera(105, 105)
renderer.request_draw(lambda: renderer.render(scene, camera))

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

Total running time of the script: (0 minutes 0.356 seconds)

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