How to draw a Physics.OverlapBox for debugging

Unity Engine
1

So given the position, halfextents and rotation of a Physics.OverlapBox, how would I draw it on the screen for debugging.

Any advice appreciated, thanks.

2

Just wanted to mention that in Unity 2022.1 (that is about to be released soon), there is a new mode that shows all the queries natively. Check this out: Physics Debugger Improvements

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3

thanks for your reply. is there a way to do it currently? this is kind of blocking on my development atm :confused:

I’ve tried various things playing around in OnDrawGizmos() and using Gizmos.matrix and Gizmos.DrawWireCube, but nothing seems to be coming close yet.

I think if I could figure out what I need to set Gizmos.matrix to and what parameters to feed Gizmos.DrawWireCube I might have success, but so far no luck.

4

This draws a box. What you want to draw is a box. If it isn’t drawing what you want (somehow) you are therefore using it wrong.

The same as the Transform matrix likely: https://docs.unity3d.com/ScriptReference/Transform-localToWorldMatrix.html

What’s to figure out? Use the above and draw the box in the local-space of the GameObject. The docs are here and its args are pretty simple: https://docs.unity3d.com/ScriptReference/Gizmos.DrawWireCube.html

Something along these lines:

Gizmos.matrix = transform.localToWorldMatrix;
Gizmos.DrawWireCube(Vector3.zero, myCubeSize);
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5

ok thanks, it was my misunderstanding about matrixes that was the issue. got it and it works now.

today is a good day to smile :stuck_out_tongue:

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