(glRotatef a x y z)

glRotatef produces a rotation of angle degrees around the point (x,y,z)

Parameter	Description
a	Rotation angle
x	Rotation x coordinate reference
y	Rotation y coordinate reference
z	Rotation z coordinate reference

Example

Example from modules/ln_glgui/glgui.scm

(define (glgui-render g1 . gx)
  (glCoreInit)  ;; setup the OpenGL pipeline
  (glPushMatrix)
  (cond 
    ((fx= glgui:rotate 1)
      (glRotatef -90. 0. 0. 1.)
      (glTranslatef (flo (- app:height)) 0. 0.))
    ((fx= glgui:rotate 2)
      (glRotatef 90. 0. 0. 1.)
      (glTranslatef 0. (flo (- app:width)) 0.))
    ((fx= glgui:rotate 3)
      (glRotatef 180. 0. 0. 1.)
      (glTranslatef (flo (- app:width)) (flo (- app:height)) 0.))
  )
  (apply glgui-renderloop (append (list g1) gx))
  (glPopMatrix)
)