Incremental update of computer-generated holograms

We describe the incremental computing method for making localized changes to a computer-generated hologram to rapidly modify the 3-D image it reconstructs. The method populates a scene with holo- graphic primitives, tracks scene-based changes, and updates the diffrac- tive contributions of only affected primitives. Changes are rapidly incor- porated into the hologram via simple arithmetic operations, and only affected regions of the hologram are updated at each simulation time step. The method can accommodate different holographic primitive rep- resentations, is designed to be suitable for hardware assistance, and is also compatible with computer-graphics-style techniques for smooth shading, texture mapping, and reflections.