Repairing a toy car with a new wheel, modeled in IceSL

wheel.lua

-- A wheel
-- @sylefeb 2022-05-07
-- MIT license
-- model for https://icesl.loria.fr/

wdiam  = 21.6
wh     = 6
waxle  = 2.1
wrimh  = 1
dentsz = 1.8
N      = math.floor(ui_scalar('dents',20,6,30))
-- wheel body
wbody = difference(
          union{
             translate(0,0,wrimh)
                   *cylinder(wdiam/2,wh-wrimh*2),
             translate(0,0,wh-wrimh)
                   *cone(wdiam/2,wdiam/2-4,wrimh),
             translate(0,0,0)
                   *cone(wdiam/2-0.3,wdiam/2,wrimh)
          },
          cylinder(waxle/2,wh)
        )
-- wheel dents
wridge = {}
for i = 1,N do
  wridge[#wridge+1] = rotate(0,0,360*i/N)
                    * translate(wdiam/2,0,0)
                    * scale(1,0.5,1)
                    * rotate(0,0,45)
                    * cube(dentsz,dentsz,wh)
end
-- subtract dents from wheel
wbody = difference(wbody,union(wridge))
-- emit the result
emit(wbody)