glRotate(3G) OpenGL Reference glRotate(3G)NAME
glRotated, glRotatef - 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:
( )
| 2 |
x (1-c) + c xy(1-c) - zs xz(1-c) + ys 0
| |
| 2 |
yx(1-c) + zs y (1-c) + c yz(1-c) - xs 0
| |
| 2 |
xz(1-c) - ys yz(1-c) + xs z (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.
ERRORS
GL_INVALID_OPERATION is generated if glRotate is executed between the
execution of glBegin and the corresponding execution of glEnd.
Page 1
glRotate(3G) OpenGL Reference glRotate(3G)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
Page 2
