APPARATUS AND METHOD FOR CALCULATING IN 3D GRAPHICS SYSTEM

摘要

A calculation apparatus and a method thereof in a 3-D(Dimensional) graphic system are provided to convert all the calculation into the log domain and perform a single-pass process. The first adder(10) adds up the values to perform the 3-D graphic calculation. A log converter(20) converts the values for the 3-D graphic calculation into the log domain respectively. A shifter(40) shifts the resulting values of the log converter. A multiplier multiplies the resulting values of the log converter respectively. A CSA(Carry Save Adder) tree(30) performs a carry calculation of the resulting values of the multiplier and the input coefficient. The second adder(50) adds up the resulting values of the multiplier and CSA.