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vpScale
Langue: en
Version: 377455 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
vpScale - multiply the current transformation matrix by a scaling matrixSYNOPSIS
#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.
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)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre