SYNOPSIS
#include <volpack.h>
vpResult
-
vpScale(vpc, sx, sy, sz)
-
- vpContext *vpc;
-
double sxR;
- double syR;
- double szR;
ARGUMENTS
- vpc
- VolPack context from vpCreateContext.
- sx
- Scale factor for the X dimension.
- sy
- Scale factor for the Y dimension.
- sz
- Scale factor for the Z dimension.
DESCRIPTION
vpScale is used to multiply the current transformation matrix by a 4-by-4 scaling matrix. The arguments specify independent scale factors for each of the three cartesian axes. The scaling matrix is:-
sx 0 0 0
0 sy 0 0
0 0 sz 0
0 0 0 1
Use vpCurrentMatrix to set the current transformation matrix. By default, the scaling matrix is post-multiplied (M = M*S where M is the current matrix and S is the scaling matrix). The VP_CONCAT_MODE option to vpSeti can be used to select pre-multiplication.