2003-2004 Silicon Graphics, Inc.
glRotate 3G
glRotate glRotatef glRotatex multiply the current matrix by a rotation matrix

## C Specification

void `glRotatef` GLfloat angle GLfloat x GLfloat y GLfloat z void `glRotatex` GLfixed angle GLfixed x GLfixed y GLfixed z

## Parameters

angle

  Specifies the angle of rotation, in degrees.

x, y, z

  Specify the x, y, and z coordinates of a vector, respectively.

## Description

`glRotate` produces a rotation of angle degrees around the vector x y z . The current matrix (see glMatrixMode) is multiplied by a rotation matrix with the product replacing the current matrix, as if glMultMatrix were called with the following matrix as its argument:

( x 2 (1-c) +c x y (1-c) -z s x z (1-c) +y s 0 x y (1-c) +z s y 2 (1-c) +c y z (1-c) -x s 0 x z (1-c) -y s y z (1-c) +x s z 2 (1-c) +c 0 0 0 0 1 )

Where c=cos angle , s=sin angle , and ||x y z|| =1 , (if not, the GL will normalize this vector).

If the matrix mode is either `GL_MODELVIEW` or `GL_PROJECTION`, all objects drawn after `glRotate` is called are rotated. Use glPushMatrix and glPopMatrix to save and restore the unrotated coordinate system.

## Notes

This rotation follows the right-hand rule, so if the vector x y z points toward the user, the rotation will be counterclockwise.

## 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, glScale, glTranslate

## Copyright

Copyright 2003-2004 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.