CVEX Type VEX network

This network defines a CVEX shader (SHOP).

See also: VEX Particle Operator, VEX Geometry Operator

CVEX is VEX code that runs outside a context.

• In other uses of VEX, such as shaders, Houdini provides many functions and predefined variables related to the context such as Cd for the diffuse color in the surface shader context.

• CVEX doesn’t have predefined variables. It is just a program that Houdini calls with certain arguments (usually corresponding to points or data on points).

For example, you can use a CVEX shader to modify guide hairs for fur. Houdini calls the CVEX program with all the attributes on the geometry and the program can modify them, such as P to modify point positions.

For more information on this subject, see CVEX shaders for fur.