glScale
NAME
glScaled, glScalef -- multiply the current matrix by a
general scaling matrix
C SPECIFICATION
void glScaled(GLdouble x,
GLdouble y,
GLdouble z)
void glScalef(GLfloat x,
GLfloat y,
GLfloat z)
PARAMETERS
- x, y, z
-
Specify scale factors along the x, y, and z
axes, respectively.
DESCRIPTION
glScale produces a general scaling along the x, y,
and z axes. The three arguments indicate the desired scale factors
along each of the three axes. The resulting matrix is
The current matrix (see
glMatrixMode)
is multiplied by this scale matrix, with the product replacing the
current matrix. That is, if M is the current matrix and S is the scale
matrix, then M is replaced with M * S.
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 1.0 are applied to the modelview matrix and
lighting is enabled, automatic normalization of normals should probably
also be enabled
(glEnable and
glDisable
with argument GL_NORMALIZE).
ERRORS
GL_INVALID_OPERATION is generated if glScale is called between
a call to glBegin and the corresponding
call to glEnd.
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
glMatrixMode,
glMultMatrix,
glPushMatrix,
glRotate,
glTranslate
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© 1995 Uwe Behrens. All rights reserved.