Translate (3)

#include <volpack.h>

\$1 vpTranslate(vpc, tx, ty, tz)

• vpContext *vpc; double *tx, *ty, *tz;

vpc

VolPack context from vpCreateContext.

tx

X component of translation vector.

ty

Y component of translation vector.

tz

Z component of translation vector.

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.

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

The return value is always VP_OK.

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