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Open Inventor 9.9

Package com.openinventor.solidviz

Real-time rendering of CSG models.

See: Description

Package com.openinventor.solidviz Description

Real-time rendering of CSG models. DEPRECATED: SolidViz is deprecated and no longer supported since OIV 9.5.

<font color="#0000FF">NOTE:</font> The classes in this extension do not exist in Open Inventor 10.0 and later.

The SolidViz extension provides solid modeling nodes for describing 3D shapes as combinations of other shapes using Boolean operations such as merge, intersection, and subtraction.

NOTE: SolidViz is not a separately licensed extension. You must have an OpenInventor license string.


CSG stands for Constructive Solid Geometry. It is a powerful method for describing a 3D shape as a combination of simpler 3D shapes using the Boolean operations merge (union), intersection, and subtraction. For instance, the expression "(A-B)+C" means remove B from A, then merge the result with C. This is called a CSG expression, describing a CSG tree.

Actual computation of the geometry resulting from a CSG expression can be a slow process, at least not fast enough for real-time updates in interactive applications.

However a visual simulation of a CSG shape can be achieved in many cases at interactive speed by a special rendering method taking advantage of accelerated OpenGL rendering and the stencil buffer.

SolidViz implements a visual simulation of CSG shapes.

A new group node (SoCSGGroup) allows the specification of a CSG expression.

Note: Some additional classes for computing the actual geometry are provided on an "as-is" basis, with no support or warranty. See the SolidViz directory $OIVHOME/examples/source/SolidViz/examples/csgAction and $OIVHOME/examples/source/SolidViz/examples/csgOperation.

Summary of Classes

Interactive Rendering of CSG Models Using SoCSGGroup

This group node performs a Constructive Solid Geometry (CSG) rendering. The children of this group define the solids that are involved in the CSG models.

The steps required to realize an interactive rendering of a CSG shape are the following:

  1. Initialize SolidViz module (SoSolidViz.initClass()).
  2. Create an SoCSGGroup.
  3. Add as many children to the SoCSGGroup as there are solid shapes.
  4. Specify the expression (though the expression field) of the SoCSGGroup.
  5. Add the SoCSGGroup to the scene graph.

The example program $OIVHOME/examples/source/SolidViz/examples/csgGroup.cxx shows these steps.


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Open Inventor 9.9

Generated on January 29, 2020, Copyright Thermo Fisher Scientific. All rights reserved.