DOKK / manpages / debian 12 / libvolpack1-dev / GetMatrix.3.en
vpGetMatrix(3) Library Functions Manual vpGetMatrix(3)

vpGetMatrix - retrieve the contents of a transformation matrix

#include <volpack.h>

vpResult

vpGetMatrix(vpc, matrix_code, matrix)

vpContext *vpc;
int matrix_code;
vpMatrix4 matrix;

VolPack context from vpCreateContext.
A code specifying one of the VolPack transformation matrices (VP_MODEL, VP_VIEW, VP_PROJECT or VP_SCREEN).
Matrix for storing the result.

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.

The normal return value is VP_OK. The following error return value is possible:

The matrix_code argument is invalid.

VolPack(3), vpCreateContext(3), vpCurrentMatrix(3)

VolPack