[osg-users] Clipping when using a shader

OpenSceneGraph Users osg-users at lists.openscenegraph.org
Thu Apr 30 10:06:53 PDT 2020


Hi Andrew,

you can use "setInitialBounds" to define your precompiled bounding box.

- Werner Modenbach -

Am 30.04.2020 um 19:01 schrieb OpenSceneGraph Users:
> Andrew,
> You have to override computeBoundingBox on your Geometry and expand it to account for your vertex displacement.
>
> Glenn Waldron
>
>
> On Thu, Apr 30, 2020 at 12:56 PM OpenSceneGraph Users <osg-users at lists.openscenegraph.org <mailto:osg-users at lists.openscenegraph.org>> wrote:
>
>     Hi,
>     I am using a simple displacement vertex shader to animate a displacement field on a geometry.
>
>     I am having an issue where during the animation the geometry is getting clipped by the near/far planes that are automatically maintained by OSG - obviously OSG knows nothing
>     about the displacements of the shader.
>
>     Any suggestions as to solve this issue in the most simple manner. I would like to avoid having to maintain my own near/far planes. I was hoping OSG had a user-definable
>     "fudge" factor for near/far...
>
>     Andrew
>
>
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