Simplygon 10.3.6400.0

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Stand-In: Clipping geometry ​

This how-to will walk you through how to tag Actors as clipping geometries for your Stand-Ins. Clipping geometries can be used to improve the processing results further or to cull away unwanted sections in a mesh. Clipping geometry is supported by both Stand-In Far- and Near pipelines.

1. Tag Actors as clipping geometry ​

Add the Actor to your Stand-In. You can do this by dragging and dropping the Actor from the World Outliner to the Stand-In in the Stand-In Outliner. Right-click on the Actor and select "Tag as ClippingGeometry", see figure 1.

Figure 1: How to tag an Actor as clipping geometry.
Figure 1: How to tag an Actor as clipping geometry.

Figure 2 shows the Actor tagged as clipping geometry.

Figure 2: Actor tagged as clipping geometry.
Figure 2: Actor tagged as clipping geometry.

2. Set up your pipeline to use clipping geometry ​

To make Simplygon aware of your clipping geometry you need to enable "Use Clipping Geometry", you can find it under "Geometry Culling Settings" for any Far- or Near Stand-In.

Figure 3: Enable clipping geometry in a pipeline.
Figure 3: Enable clipping geometry in a pipeline.

3. (Optional) Set up your pipeline to use culling ​

If you plan on using the clipping geometry for culling, you might need to enable further settings.

Near Pipeline

  • Aggregation Settings → Enable Geometry Culling = true
Figure 4: Enable culling in a Near pipeline.
Figure 4: Enable culling in a Near pipeline.

Far Pipeline

  • No extra settings needed.

Example using clipping geometry for culling ​

Figure 5 shows an example of culling using the paved road mesh as clipping geometry.

Figure 5: Culling example using clipping geometry.
Figure 5: Culling example using clipping geometry.