GLSCALE(3G) UNIX Programmer's Manual GLSCALE(3G)
glScaled, glScalef - multiply the current matrix by a gen-
eral scaling matrix
void glScaled( GLdouble x,
GLdouble y,
GLdouble z )
void glScalef( GLfloat x,
GLfloat y,
GLfloat z )
x, y, z
Specify scale factors along the x, y, and z axes,
respectively.
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.
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 nor-
mals by calling glEnable with the argument GL_NORMALIZE.
GL_INVALID_OPERATION is generated if glScale is executed
between the execution of glBegin and the corresponding exe-
cution of glEnd.
MirOS BSD #10-current Printed 20.2.2012 1
GLSCALE(3G) UNIX Programmer's Manual GLSCALE(3G)
glGet with argument GL_MATRIX_MODE
glGet with argument GL_COLOR_MATRIX
glGet with argument GL_MODELVIEW_MATRIX
glGet with argument GL_PROJECTION_MATRIX
glGet with argument GL_TEXTURE_MATRIX
glMatrixMode(3G), glMultMatrix(3G), glPushMatrix(3G),
glRotate(3G), glTranslate(3G)
MirOS BSD #10-current Printed 20.2.2012 2
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