A method and apparatus are provided for a lighting system for graphics
processing. Included is a plurality of input buffers adapted for being
coupled to a transform system for receiving vertex data therefrom. The
input buffers include a first input buffer, a second input buffer and a
third input buffer. An input of the first buffer, the second input buffer
and the third input buffer are coupled to an output of the transform
system. Further included is a multiplication logic unit having a first
input coupled to an output of the first input buffer and a second input
coupled to an output of the second input buffer. An arithmetic logic unit
has a first input coupled to an output of the second input buffer. The
arithmetic logic unit further has a second input coupled to an output of
the multiplication logic unit. An output of the arithmetic logic unit is
coupled to the output of the lighting system. Next provided is a first
register unit having an input coupled to the output of the arithmetic
logic unit and an output coupled to the first input of the arithmetic
logic unit. A second register unit has an input coupled to the output of
the arithmetic logic unit. Also, such second register has an output
coupled to the first input and the second input of the multiplication
logic unit. A lighting logic unit is also provided having a first input
coupled to the output of the arithmetic logic unit, a second input
coupled to the output of the first input buffer, and an output coupled to
the first input of the multiplication logic unit. Finally, memory is
coupled to at least one of the inputs of the multiplication logic unit
and the output of the arithmetic logic unit. The memory has stored
therein a plurality of constants and variables for being used in
conjunction with the input buffers, the multiplication logic unit, the
arithmetic logic unit, the first register unit, the second register unit,
and the lighting logic unit for processing the vertex data.
