vptranslate(3)

NAME

vpTranslate - multiply the current transformation matrix by a translation matrix

SYNOPSIS

#include <volpack.h>
vpResult
vpTranslate(vpc, tx, ty, tz)
    vpContext *vpc;
    double *tx, *ty, *tz;

ARGUMENTS

vpc VolPack context from vpCreateContext.

tx X component of translation vector.

ty Y component of translation vector.

tz Z component of translation vector.

DESCRIPTION

vpTranslate is used to multiply the current transformation matrix by a 4-by-4 translation matrix. The translation matrix is: 1 0 0 tx

0 1 0 ty
0 0 1 tz
0 0 0 1

Use vpCurrentMatrix to set the current transformation matrix. By default, the transformation matrix is post-multiplied (M = M*T where M is the current matrix and T is the translation matrix). The VP_CONCAT_MODE option to vpSeti can be used to select pre-multiplication.

STATE VARIABLES

The current matrix concatenation parameters can be retrieved with the following state variable codes (see vpGeti(3)): VP_CURRENT_MATRIX, VP_CONCAT_MODE.

ERRORS

The return value is always VP_OK.

SEE ALSO

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

VolPack vpTranslate(3)