OpenCL Displace SOP

Displaces points along their normals.

This operator has a lot of advantages over the Peak SOP:

1. OpenCL acceleration.

2. VEX code branch.

3. Collision geometry support (Second input).

4. Preserves the normals of isolated points.

5. Ability to specify the normals as an attribute.

6. Ability to use a weight attribute.

7. Compilable.