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1.1 root 1: norm
2: .nf
3: .IS
4: ...minx -1.5
5: ...maxy 1.5
6: ...maxx 1.5
7: ...miny -1.5
8: ...libfile hole
9: gridline {
10: var a,b;
11: var neg, pos;
12: conn 0.5*(a+b) - neg to 0.5*(a+b) + pos;
13: }
14: main{
15: conn (1,0) to (1,-1) using 10 gridline {neg = 1; pos = 0;} <a,b>;
16: conn (0,-1) to (1,-1) using 10 gridline {neg = 0; pos = (0,1);} <a,b>;
17: put hole{
18: radius = 1;
19: center = (0,0);
20: opaque exterior;
21: };
22: }
23: .IE
24: .IS
25: ...forget gridline
26: .IE
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