Boolean SOP
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Summary[edit]
The Boolean SOP takes two closed polygonal sets, A and B. Set these Sources to the SOPs with the 3D shapes that you wish to operate on. There are two important requirements for input geometry:
- Shapes must be completely closed. A tube with open ends is not an acceptable input. You can close Tube ends with an end-cap. An extruded letter with no back polygons output is also unacceptable (even with backs output it can be unacceptable because of the second requirement).
- All polygons must be convex and coplanar. In the case of the Extrude SOP, you must select Output Convex Faces for front and back faces. It will now be a usable input for Boolean. The Divide SOP also offers a convexing function for geometry not created with the Extrude SOP.
Other caveats for Boolean are the following:
- Point colors and texture UV coordinates are not interpolated correctly.
- In some cases polygons can be reversed so that all normals point outwards. The polygon reversal should not usually present much of a problem (use a Primitive SOP > Face/Hull page > Vertex > Reverse to reverse them if necessary).
This SOP is quite visual and intuitive; you can experiment with the different combinations on screen to see the effects.
Note: The Boolean SOP handles polygonal geometry types. For boolean-type operations with nurbs and Bezier surfaces - see Surfsect SOP.
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