vpgetmatrix(3) - Linux man page
Name
vpGetMatrix - retrieve the contents of a transformation matrix
Synopsis
#include <volpack.h>
vpResult
- vpGetMatrix(vpc, matrix_code, matrix)
- vpContext *vpc;
int matrix_code;
vpMatrix4 matrix;
Arguments
- vpc
VolPack context from vpCreateContext.
- matrix_code
- A code specifying one of the VolPack transformation matrices (VP_MODEL, VP_VIEW, VP_PROJECT or VP_SCREEN).
- matrix
Matrix for storing the result.
Description
vpGetMatrix retrieves the contents of one of the transformation matrices (see vpcurrentmatrix(3)). The special code VP_SCREEN causes the function to compute the transformation from object coordinates to image coordinates and return a matrix describing this transformation.
Errors
The normal return value is VP_OK. The following error return value is possible:
- VPERROR_BAD_OPTION
- The matrix_code argument is invalid.
See Also
volpack(3), vpcreatecontext(3), vpcurrentmatrix(3)