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.