ResetLine

ResetLine

This is the animated line-field demo from NGL9Demos. The OpenGL version uses one indexed GL_LINE_STRIP draw with a primitive restart index between each blade.

There is no primitive restart in WebGPU, so main_webgpu.py expands each blade into independent line-list segments. Both versions start from the same seeded geometry in blade_field.py.

Running

uv run --script main.py
uv run --script main_webgpu.py

The original field is 120 by 120 blades. Smaller fields can be useful whilst experimenting.

uv run --script main_webgpu.py --rows 60 --cols 60

Controls

• A starts and stops the wind animation.
• Left-drag rotates, right-drag pans and the wheel zooms.
• Space resets the view.
• Escape quits.