!




mat1 = c
mat2 = d


material mat1

prism_   4, 0.015, 

     0, 0, 15,
     a/2, 0, 15,
     a/2, b, 15,
     0, b, 15





addz 0.015
addy 0.95
addx 0.07

call "handle_2" mat2

addz -0.015
mulz -1


call "handle_2" mat2
