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Interactive Relighting of Dynamic Refractive Objects

  • US 20100033482A1
  • Filed: 08/11/2008
  • Published: 02/11/2010
  • Est. Priority Date: 08/11/2008
  • Status: Abandoned Application
First Claim
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1. A system for rendering an image of a refractive object in a dynamic scene at an interactive rate so as to depict the effects of refraction, absorption, and anisotropic scattering of light on the object, comprising:

  • a general purpose computing device, anda computer program having program modules executable by the computing device, comprising,an object voxelization module for,converting a representation of the surfaces of the refractive object into a volumetric representation of object in the form of a rectangular voxel grid whenever said refractive object surfaces representation is input in lieu of a volumetric object representation, andassigning user-input material parameters comprising a refractive index to each voxel of the volumetric object representation,a photon tracing module for tracing paths of photons in a step-wise manner as each photon refracts through the object and assigning radiance values to all the voxels that the photon traverses, wherein the size of each step forward through the refractive object is variable and based on variations in refractive index derived from an octree representation of the object'"'"'s refractive indexes, anda rendering module for rendering an output image of the refractive object from a user-input viewpoint by tracing viewing rays from the viewpoint into the scene and calculating the amount of radiance that reaches the viewpoint along each of the rays.

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