GLSCALE() MachTen Programmer’s Manual GLSCALE()

NAME
glScaled, glScalef - multiply the current matrix by a gen-
eral scaling matrix

C SPECIFICATION
void glScaled( GLdouble x,
GLdouble y,
GLdouble z )
void glScalef( GLfloat x,
GLfloat y,
GLfloat z )

delim $$

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:

left ( ~ down 20 matrix {
ccol { ~"x" above ~0 above ~0 above ~0 }
ccol { ~0 above ~"y" above ~0 above ~0 }
ccol { ~0 above ~0 above ~"z" above ~0 }
ccol { ~0 above ~0 above ~0 above ~1} } ~~ right )

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_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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