2003-2004
Silicon Graphics, Inc.
glScale
3G
glScale
glScalef
glScalex
multiply the current matrix by a general scaling
matrix
C Specification
void glScalef
GLfloat x
GLfloat y
GLfloat z
void glScalex
GLfixed x
GLfixed y
GLfixed z
Parameters
x,
y,
z
Specify scale factors along the
x,
y, and
z axes, respectively.
Description
glScale produces a nonuniform scaling along the
x,
y, and
z
axes. The three parameters indicate the desired scale factor
along each of the three axes.
The current matrix (see
glMatrixMode)
is multiplied by this scale matrix, and the product replaces
the current matrix as if glScale
were called with the following matrix as its argument:
(
x
0
0
0
0
y
0
0
0
0
z
0
0
0
0
1
)
If the matrix mode is either GL_MODELVIEW or
GL_PROJECTION, all objects drawn after
glScale is called are scaled.
Use
glPushMatrix
and
glPopMatrix
to save and restore the unscaled coordinate system.
Notes
If scale factors other than 1 are applied to the
modelview matrix and lighting is enabled, lighting often
appears wrong. In that case, enable automatic normalization of
normals by calling
glEnable
with the argument GL_NORMALIZE.
Associated Gets
glGet with argument GL_MATRIX_MODE
glGet with argument GL_MODELVIEW_MATRIX
glGet with argument GL_PROJECTION_MATRIX
glGet with argument GL_TEXTURE_MATRIX
See Also
glEnable,
glMatrixMode,
glMultMatrix,
glPushMatrix,
glRotate,
glTranslate
Copyright
Copyright 2003-2004
Silicon Graphics, Inc. This document is licensed under the SGI
Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.