METHOD FOR PROCESSING THREE-DIMENSIONAL COORDINATE TRANSFORMATION IN COMPUTER GRAPHIC DEVICE

摘要

PURPOSE:To omit the previous execution of parameter calculation by substituting a necessary numerical parameter in each sort of coordinate transformation to find out a 1st coordinate transformation matrix and then finding out a 2nd coordinate transformation matrix for three-dimensional coordinate transformation based on the 1st matrix. CONSTITUTION:A necessary numerical parameter is substituted in each sort of selected coordinate transformation to fine out the 1st coordinate transformation matrix and the coordinate value of a three-dimensional object is transformed into three-dimensional coordinates by the 2nd coordinate transformation matrix based on the found 1st coordinate transformation matrix in each sort. Consequently, the order and combination of transformation can be optionally specified, arrangement whose parameter calculation is difficult such as arrangement whose transformation order is an important element and rotation around an optional axis can be easily executed, and since the preceding execution of parameter calculation is unnecessary, rapid computer graphic processing can be attained.