| GPGLX2 ( matrix) |
Purpose
Use GPGLX2 to insert a two-dimensional, Set Global Transformation 2 structure element into the open structure following the element pointer or replace the element pointed at by the element pointer with a Set Global Transformation 2 structure element depending on the current edit mode.
When encountered during traversal, this element is expanded by the graPHIGS API into a 44 matrix as follows:
|a b c| |a b 0 c|
|d e f| ------> |d e 0 f|
|g h i| |0 0 1 0|
|g h 0 i|
and causes the expanded matrix to
become the current global transformation for the current structure.
The resultant matrix,
in conjunction with the local modeling
transformation, transforms all subsequent primitives from the Modeling
Coordinate (MC)
system to the World Coordinate (WC) system.
Note:
When inquired, the matrix returned by the Inquire Element Content ( GPQE) subroutine is the expanded 44 matrix; the matrix returned by the Inquire List of Element Data ( GPQED) subroutine is the 33 matrix.
Parameters
The elements must be in the following order for the input transformation matrix:
|m11 m12 m13|
|m21 m22 m23|---> (m11,m12,m13,m21,m22,m23,m31,m32,m33)
|m31 m32 m33|
Error Codes
Related Subroutines
None
RCP code
201329668 ( X'0C000C04')