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)