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Method for reducing network bandwidth by delaying shadow ray generation

  • US 7,782,318 B2
  • Filed: 11/22/2006
  • Issued: 08/24/2010
  • Est. Priority Date: 11/22/2006
  • Status: Active Grant
First Claim
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1. A method of performing ray tracing, comprising:

  • configuring one or more processors to perform an operation, comprising;

    issuing a ray into a three-dimensional scene;

    with a first processor;

    tracing the ray through a spatial index having nodes representing bounding volumes within the three-dimensional scene by taking branches to nodes defining bounding volumes intersected by the ray until a first leaf node is reached; and

    , after a leaf node is reached, sending information defining the ray and the first leaf node to a second processor;

    with the second processor;

    performing ray-primitive intersection tests to determine if the ray intersects a primitive contained within a bounding volume defined by the first leaf node;

    generating a first set of secondary rays;

    sending, information defining the first set of secondary rays to the first processor; and

    sending a ray-primitive intersection point to the first processor; and

    with the first processor, generating a second set of secondary rays based on at least the ray-primitive intersection point.

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