HP Workstation zx2000 OpenGL 1.1 Reference for HP-UX 11.x - Page 388

R glRotate 388 glRotate 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 x, y, z Specifies the angle of rotation, in degrees. 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: xx (1- c) + c xy (1 - c) - xz (1- c) + 0 zs ys yx (1- c) + zs yy (1- c) + c yz (1 - c) 0 xs zx (1 - c) - zy (1 - c) + zz (1 - c) + c 0 ys xs 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. Chapter 16