//Farbbuffer und Tiefenpuffer entleeren
 glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);
glLoadIdentity();

glTranslatef(0,0,-110 + cube.zoom);
glRotatef(360,0,1,0);
glRotatef(cube.xrot,1,0,0);
glRotatef(cube.yrot,0,1,0);
glRotatef(cube.x3,1,0,0);
glRotatef(cube.zrot,0,0,1);

glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
drawcube(false);
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);

//glDepthRange(0.0, 1.0);
if Trennlinien1.checked then
  begin
  gllinewidth(panel.Width / 200);
  drawcube(true);
  end;

SwapBuffers(DC);
end;