NAME
fglScaled, fglScalef - multiply the current matrix by a
general scaling matrix
FORTRAN SPECIFICATION
SUBROUTINE fglScaled( REAL*8 x,
REAL*8 y,
REAL*8 z )
SUBROUTINE fglScalef( REAL*4 x,
REAL*4 y,
REAL*4 z )
PARAMETERS
x, y, z
Specify scale factors along the x, y, and z axes,
respectively.
DESCRIPTION
fglScale 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 fglMatrixMode) is multiplied by this
scale matrix, and the product replaces the current matrix as
if fglScale 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 fglScale is called are scaled.
Use fglPushMatrix and fglPopMatrix 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 fglEnable with the argument GL_NORMALIZE.
ERRORS
GL_INVALID_OPERATION is generated if fglScale is executed
between the execution of fglBegin and the corresponding
execution of fglEnd.
ASSOCIATED GETS
fglGet with argument GL_MATRIX_MODE
fglGet with argument GL_MODELVIEW_MATRIX
fglGet with argument GL_PROJECTION_MATRIX
fglGet with argument GL_TEXTURE_MATRIX
SEE ALSO
fglMatrixMode, fglMultMatrix, fglPushMatrix, fglRotate,
fglTranslate