Programmable visible surface compositing

A method of determining a value of an image sample point of a computer graphics image, the method comprising:

• receiving a set of geometry samples potentially visible to an image sample point, wherein each geometry sample represents at least a portion of scene geometry;
• using a processor, invoking a visibility function of a first geometry sample;
• identifying a second geometry sample in the set of geometry samples using the visibility function;
• accessing a non-depth attribute of the second geometry sample using the visibility function;
• determining a resulting occlusion of the first geometry sample using at least the non-depth attribute of the second geometry sample;
• and
• determining a value of an image sample point of an image at least in part from the resulting occlusion of the selected geometry sample;
• and
• storing the image on a computer-readable medium in a non-transitory form wherein the image includes the image sample point.

A method of determining a value of an image sample point of a computer graphics image, the method comprising:

• receiving a set of geometry samples potentially visible to an image sample point, wherein each geometry sample represents at least a portion of scene geometry and is associated with a geometry sample attribute value;
• selecting a first geometry sample in the set of geometry samples;
• using a processor, identifying a second geometry sample in the set of geometry samples based on its non-depth geometry sample attribute value;
• determining if the identified second geometry sample in the set of geometry samples is located behind the first geometry sample;
• specifying a resulting occlusion of the first geometry sample using the non-depth geometry sample attribute value of the second geometry sample in response the determination that the second geometry sample is behind the first geometry sample;
• determining a value of an image sample point of an image at least in part from the resulting occlusion of the selected geometry sample;
• and
• storing the image on a computer-readable medium in a non-transitory form wherein the image includes the image sample point.

A method of determining a value of an image sample point of a computer graphics image, the method comprising:

• receiving a set of geometry samples potentially visible to an image sample point, wherein each geometry sample represents at least a portion of scene geometry;
• selecting a first geometry sample in the set of geometry samples, wherein the first geometry sample represents a motion-blurred and unshadowed version of an object;
• using a processor, identifying a second geometry sample in the set of geometry samples based on a non-depth attribute of the second geometry sample, wherein the second geometry sample represents a non-motion-blurred and shadowed version of the object;
• specifying the resulting attribute of the first geometry sample using an attribute of the first geometry sample and an attribute of the second geometry sample;
• and
• determining a value of an image sample point of an image at least in part from the resulting attribute value of the selected geometry sample;
• and
• storing the image on a computer-readable medium in a non-transitory form wherein the image includes the image sample point.