splinecurves2dv2 algebraic3d #refinement factor 1 points #outer circle (p x y) 1 -2 -2 2 0 -2 3 2 -2 4 -2 0 5 2 0 6 -2 2 7 0 2 8 2 2 #inner circle (p x y) 9 -1.99 -1.99 10 0 -1.99 11 1.99 -1.99 12 -1.99 0 13 1.99 0 14 -1.99 1.99 15 0 1.99 16 1.99 1.99 segments #outer circle (out in n p[1] ... p[n] flags) 1 0 3 2 3 5 -bc=1 1 0 3 5 8 7 -bc=1 1 0 3 7 6 4 -bc=1 1 0 3 4 1 2 -bc=1 #inner circle (out in n p[1] ... p[n] flags) 2 1 3 10 11 13 -bc=2 2 1 3 13 16 15 -bc=2 2 1 3 15 14 12 -bc=2 2 1 3 12 9 10 -bc=2 materials 1 Nylon66 -maxh=0.1 2 Nylon66 -maxh=0.02