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Man Pages
vpTranslate(3) FreeBSD Library Functions Manual vpTranslate(3)

vpTranslate - multiply the current transformation matrix by a translation matrix

#include <volpack.h>
vpResult
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)
VolPack

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