https://github.com/kylc/egui_wgpu_plot

Experiments in 2D plotting on the GPU with egui
https://github.com/kylc/egui_wgpu_plot

egui gpu

Last synced: about 2 months ago
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Experiments in 2D plotting on the GPU with egui

• Host: GitHub
• URL: https://github.com/kylc/egui_wgpu_plot
• Owner: kylc
• Created: 2022-09-24T22:32:26.000Z (about 2 years ago)
• Default Branch: master
• Last Pushed: 2022-09-24T22:45:11.000Z (about 2 years ago)
• Last Synced: 2024-08-02T12:23:09.130Z (5 months ago)
• Topics: egui, gpu
• Language: Rust
• Homepage:
• Size: 20.5 KB
• Stars: 20
• Watchers: 2
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

• awesome-egui - egui_wgpu_plot

README

        
# egui_wgpu_plot

Experiments in rendering 2D line plots in egui directly on the GPU with minimal

copying.

## Demo

    cargo run --release --example lorenz

https://user-images.githubusercontent.com/233860/192120927-0761b56c-a50e-4ee9-a7ab-147b3b3c04e0.mp4

## Theory

In order to achieve realtime rendering performance on large datasets (1M+

points), the transformation from data-space to screen-space is performed on the

GPU. This means that GPU vertex buffers are only updated if the data changes,

not when the view is panned or zoomed.

In order to draw nice-looking lines, the approach described in [Drawing

Antialiased Lines with OpenGL][1] is used. Duplicate vertices are provided to

the GPU, one with each normal vector of the line at that point. This is provided

to the shader as a triangle strip, which then offsets the vertices along their

normals to add line width and feathers the edge for anti-aliasing.

![](https://miro.medium.com/max/640/0*8ZZJdx9kleLSsT_Z.png)

[1]: https://blog.mapbox.com/drawing-antialiased-lines-with-opengl-8766f34192dc