Opaque Discs Drawing Over Cnavas

Harper Rhett

2 months ago
updated 2 months ago

I am drawing opaque discs in immediate mode using "beginCameraRendering" but they draw on top of world space canvases. Is there anything I can do to fix this?

Reporting a bug? please specify Unity version:

2022.3.27f1

Reporting a bug? please specify Shapes version:

4.3.1

Reporting a bug? please specify Render Pipeline:

URP

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Harper Rhett

2 months ago

Thanks! I was not using "RenderPassEvent.AfterRenderingOpaques". Seems to have fixed the issue.

Is there any downside to subscribing like this as opposed to using ImmediateModeShapeDrawer:

protected virtual void Awake()
{
RenderPipelineManager.beginCameraRendering += Draw;
}

private void OnDestroy()
{
RenderPipelineManager.beginCameraRendering -= Draw;
}

and then in the Draw function:

private void Draw(ScriptableRenderContext context, Camera camera)
{
using (Shapes.Draw.Command(camera, RenderPassEvent.AfterRenderingOpaques))
{
// Draw stuff here!
}
}

I like to do this for each script that needs to draw. I understand I lose the ability to define draw order, but otherwise it should be fine right? Instancing should work out alright since I am only drawing similar shapes within the same draw function.

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Freya Holmér creator

2 months ago

What do you mean by using "beginCameraRendering" specifically?

Shapes is very sensitive to the exact moment to render in, I generally recommend using the ImmediateModeShapeDrawer helper class for this.

For example, this will draw opaque shapes properly together with world space canvases:

using Shapes;
using UnityEngine;
using UnityEngine.Rendering.Universal;

[ExecuteAlways] // <-- just to make it draw in the scene view as well
public class OpaqueOrderTest : ImmediateModeShapeDrawer {
    public override void DrawShapes( Camera cam ) {
       using( Draw.Command( cam, RenderPassEvent.AfterRenderingOpaques ) ) {
          Draw.BlendMode = ShapesBlendMode.Opaque;
          Draw.Disc( Vector3.zero, 100, Color.red );
       }
    }
}

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Harper Rhett

2 months ago

Updated to 4.5.0 and this problem still seems to be the case.

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