Appeal No. 2002-1448
Application 09/067,321
polygon is texture mapped. As described above, “texel light”
codes are placed within the texels of the texture map data
accessed by step 325. The “texel light” codes control the way in
which lighting is performed on a texel by texel basis. At step
330, lighting is added to the pixels of the current polygon. See
page 14 of Appellants’ specification.
Independent claim 1 is representative of Appellants’ claimed
invention and is reproduced as follows:
1. In a computer controlled graphics display system, a
method of displaying a graphics image, said method comprising the
steps of:
accessing a memory to obtain a graphics primitive,
translating the graphics primitive into a plurality of
pixels, each of the plurality of pixels having a two-dimensional
display coordinate, and
displaying the graphics primitive on a display screen, said
step of displaying comprising the steps of:
for each respective pixel, obtaining from a texture map
a corresponding texel, the corresponding texel comprising a
control code and a color value and having a two-dimensional
texel coordinate,
for each corresponding texel, when the control code is
of a first value, selectively performing a lighting
operation to modify the color value of the corresponding
texel based on a lighting condition, and bypassing said
lighting operation for the corresponding texel when the
control code is of a second value, and
displaying each of the respective pixels on the display
screen with the color value of the corresponding texel.
3
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