csg_cylinder(
  start = c(0, 0, 0),
  end = c(0, 1, 0),
  radius = 1,
  corner_radius = 0
)

#Generate a basic cylinder:
generate_ground(material=diffuse(checkercolor="grey20")) %>% 
  add_object(csg_object(csg_cylinder(radius=0.25),material=glossy(color="red"))) %>% 
  render_scene(clamp_value=10,fov=20)
  
#Change the orientation by specifying a start and end
generate_ground(material=diffuse(color="dodgerblue4",checkercolor="grey10")) %>% 
  add_object(csg_object(csg_cylinder(start = c(-1,0.5,-2), end = c(1,0.5,-2),
    radius=0.5),material=glossy(checkercolor="red"))) %>% 
  render_scene(clamp_value=10,fov=20,
               lookat=c(0,0.5,-2),lookfrom=c(3,3,10))
 
#Show the effect of changing the radius
generate_ground(material=diffuse(color="dodgerblue4",checkercolor="grey10")) %>% 
  add_object(csg_object(
    csg_combine(
    csg_cylinder(start = c(-1,0.5,-2), end = c(1,0.5,-2), radius=0.5),
    csg_cylinder(start = c(-0.5,1.5,-2), end = c(0.5,1.5,-2), radius=0.25)),
    material=glossy(checkercolor="red"))) %>% 
  render_scene(clamp_value=10,fov=20,
               lookat=c(0,0.5,-2),lookfrom=c(-3,3,10))
               
#Render a red marble cylinder in a Cornell box
generate_cornell(light=FALSE) %>% 
  add_object(csg_object(
    csg_cylinder(start = c(555/2,0,555/2), end = c(555/2,350,555/2), radius=100),
    material=glossy(color="darkred",noisecolor="white",noise=0.03))) %>% 
    add_object(sphere(y=555,x=5,z=5, radius=5,
               material=light(intensity=10000,
                              spotlight_focus = c(555/2,555/2,555/2),spotlight_width = 45))) %>% 
  render_scene(clamp_value=4)