GLSCALE(3gl)
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