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Struct egui::PaintCallback

source · 
pub struct PaintCallback {
    pub rect: Rect,
    pub callback: Arc<dyn Any + Send + Sync + 'static>,
}
Expand description

If you want to paint some 3D shapes inside an egui region, you can use this.

This is advanced usage, and is backend specific.

Fields§

§rect: Rect

Where to paint.

§callback: Arc<dyn Any + Send + Sync + 'static>

Paint something custom (e.g. 3D stuff).

The concrete value of callback depends on the rendering backend used. For instance, the glow backend requires that callback be an egui_glow::CallbackFn while the wgpu backend requires a egui_wgpu::CallbackFn.

If the type cannnot be downcast to the type expected by the current backend the callback will not be drawn.

The rendering backend is responsible for first setting the active viewport to Self::rect.

The rendering backend is also responsible for restoring any state, such as the bound shader program, vertex array, etc.

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