splinecurves2d 1 8 -1 -1 1 0 -1 1 +1 -1 1 -1 0 1 +1 0 1 -1 +1 1 0 +1 1 +1 +1 1 4 1 0 3 2 3 5 1 1 0 3 5 8 7 1 1 0 3 7 6 4 1 1 0 3 4 1 2 1
