This manual page is for Mac OS X version 10.6.3

Reading manual pages

GLSCALE(3G)                                                                                      GLSCALE(3G)



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 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.

ERRORS
       GL_INVALID_OPERATION is generated if glScale is executed between the execution  of  glBegin  and  the
       corresponding execution of glEnd.

ASSOCIATED GETS
       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

SEE ALSO
       glMatrixMode(3G), glMultMatrix(3G), glPushMatrix(3G), glRotate(3G), glTranslate(3G)




                                                                                                 GLSCALE(3G)