1991-2006
Silicon Graphics, Inc.
glRotate
3G

# glRotate

multiply the current matrix by a rotation matrix

## C Specification

                    void glRotated
                    GLdouble angle
                    GLdouble x
                    GLdouble y
                    GLdouble z

                    void glRotatef
                    GLfloat angle
                    GLfloat x
                    GLfloat y
                    GLfloat 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 &af; 1 - c + c x &it; y &af; 1 - c - z &it; s x &it; z &af; 1 - c + y &it; s 0 y &it; x &af; 1 - c + z &it; s y 2 &af; 1 - c + c y &it; z &af; 1 - c - x &it; s 0 x &it; z &af; 1 - c - y &it; s y &it; z &af; 1 - c + x &it; s z 2 &af; 1 - c + c 0 0 0 0 1

Where c = cos &af; angle , s = sin &af; 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.

## Errors

`GL_INVALID_OPERATION` is generated if `glRotate` 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, glMultMatrix, glPushMatrix, glScale, glTranslate

## Copyright

Copyright 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.