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Instance transform has no effect on volume #297

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stukowski opened this issue Mar 18, 2025 · 4 comments
Closed

Instance transform has no effect on volume #297

stukowski opened this issue Mar 18, 2025 · 4 comments

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@stukowski
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I am using Helide to render a transferFunction1D volume in a group in a transform instance. The volume is visible in the rendered image, but the transformation set on the instance seems to have no effect. It's always using the identity matrix.

Is this a limitation of Helide, the ANARI specs, or am I doing something wrong? My intention is to apply a rotate/scale/shear transformation on the regular grid volume.
@jeffamstutz
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That looks like a bug in helide -- volumes absolutely should respect the instance transform (VisRTX does, for example).

@jeffamstutz
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Fixed in #298:

Image

@stukowski
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Thanks. This looks good now.

I am traveling (without a GPU) and am therefore currently forced to use Helide for code development.

@jeffamstutz
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Makes sense, glad you've got something to work with! 😄

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@jeffamstutz @stukowski