Question Matrix4x4 to position, rotate, and scale particle

Hello,

In your case, you are facing the Euler angle extraction from a matrix which isn't supported by the GPU evaluation.


We have planned to improve the error feedback to help the user to find what is the actual issue and how to resolve it.

Modify the particle rotation using Euler isn't always the most appropriate. Alternatively, you can directly orient a particle changing the axisX/Y/Z attributes (if you are curious about the transform computation behind the curtain, you can take a look at GetElementToVFXMatrix) but for now, you can't extract matrix columns in VisualEffectGraph.

However, there is a workaround using the Transform operators :


We are aware this solution isn't ideal because it will generate useless multiply, addition or dot product on GPU for some platform. You can potentially follow the update of this public issue even if it has been closed by design, we are going to address this limitation.

You can find the VFX and Scene I used for this sample attached to this post.

N.B.: While doing this sample, we found an issue with the extract position when evaluated on GPU, you won't be affected if you are using "Transform (Position)" instead.