System and method for adaptive span computation during ray casting
First Claim
1. A computer-implemented method comprising:
- identifying a down point location;
determining one or more start point fractional values based upon the down point location;
selecting one of the start point fractional values for a view screen segment;
computing a view screen segment start point using the selected start point fractional value;
generating image values corresponding to the view screen segment starting at the view screen segment start point; and
displaying the image values on a view screen.
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Accused Products
Abstract
A system and method for adaptive span computation when ray casting is presented. A processor uses start point fractional values during view screen segment computations that start a view screen segment'"'"'s computations a particular distance away from a down point. This prevents an excessive sampling density during image generation without wasting processor resources. The processor identifies a start point fractional value for each view screen segment based upon each view screen segment'"'"'s identifier, and computes a view screen segment start point for each view screen segment using the start point fractional value. View screen segment start points are “tiered” and are a particular distance away from the down point. This stops the view screen segments from converging to a point of severe over sampling while, at the same time, providing a pseudo-uniform sampling density.
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Citations
20 Claims
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1. A computer-implemented method comprising:
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identifying a down point location;
determining one or more start point fractional values based upon the down point location;
selecting one of the start point fractional values for a view screen segment;
computing a view screen segment start point using the selected start point fractional value;
generating image values corresponding to the view screen segment starting at the view screen segment start point; and
displaying the image values on a view screen. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer program product comprising:
a computer operable medium having computer readable code, the computer readable code being effective to;
identify a down point location;
determine one or more start point fractional values based upon the down point location;
select one of the start point fractional values for a view screen segment;
compute a view screen segment start point using the selected start point fractional value;
generate image values corresponding to the view screen segment starting at the view screen segment start point; and
display the image values on a view screen. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An information handling system comprising:
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one or more processors;
a memory accessible by the processors;
one or more nonvolatile storage devices accessible by the processors; and
a view screen segment start point computation tool for computing view screen segment start points, the view screen segment start point computation tool being effective to;
identify a down point location;
determine one or more start point fractional values based upon the down point location;
select one of the start point fractional values for a view screen segment;
compute a view screen segment start point using the selected start point fractional value;
generate image values corresponding to the view screen segment starting at the view screen segment start point; and
display the image values on a view screen. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification