This topic describes the ST_3DDifference function. This function calculates the difference between a 3D model and a box3d or meshgeom object.
Syntax
sfmesh ST_3DDifference(sfmesh sfmeshObject, box3d box);
sfmesh ST_3DDifference(sfmesh sfmeshObject, meshgeom geom);Parameters
| Parameter | Description |
|---|---|
| sfmeshObject | The sfmesh object. |
| box | The box3d object. |
| geom | The closed meshgeom object. |
Description
The result is synchronously updated to the UV and Normal values that are associated with the sfmesh object.
- If this function calculates the difference between an sfmesh object and a box3d object, this function aligns the axes and returns the difference.
- If this function calculates the difference between an sfmesh object and a meshgeom object, this function directly returns the difference.
Examples
SELECT ST_NumPatches(ST_3DDifference(ST_3DMakeSphere(1.0, 5), 'BOX3D(0 0 0, 0.2 0.2 0.2)'::box3d));
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