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poly2d/: Yet another 2D polygon library (WIP)

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This commit is contained in:
Werner Almesberger
2012-05-04 21:40:55 -03:00
parent c2bfbd5a5e
commit dfa85075e8
24 changed files with 1793 additions and 0 deletions
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103
poly2d/test/area Executable file
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@@ -0,0 +1,103 @@
#!/bin/sh
. ./Common
###############################################################################
tst "area without holes, constant offset" <<EOF
struct p2d *p = p2d_new();
struct p2d *q;
p2d_append(p, v2d_new(0, 0));
p2d_append(p, v2d_new(5.5, 0));
p2d_append(p, v2d_new(5.5, 4.5));
p2d_append(p, v2d_new(0, 4.5));
p2d_close(p);
q = p2d_area(p, 1, 0);
p2d_write_gnuplot_all(stdout, q);
EOF
expect <<EOF
1 1
4.5 1
4.5 3.5
1 3.5
1 1
2 2
3.5 2
3.5 2.5
2 2.5
2 2
EOF
#------------------------------------------------------------------------------
tst "area without holes, offset with overlap" <<EOF
struct p2d *p = p2d_new();
struct p2d *q;
p2d_append(p, v2d_new(0, 0));
p2d_append(p, v2d_new(5.5, 0));
p2d_append(p, v2d_new(5.5, 4.5));
p2d_append(p, v2d_new(0, 4.5));
p2d_close(p);
q = p2d_area(p, 1, 0.3);
p2d_write_gnuplot_all(stdout, q);
EOF
expect <<EOF
1 1
4.5 1
4.5 3.5
1 3.5
1 1
1.7 1.7
3.8 1.7
3.8 2.8
1.7 2.8
1.7 1.7
EOF
#------------------------------------------------------------------------------
tst "area with one symmetric hole" <<EOF
struct p2d *pl, *p;
struct p2d *q;
pl = p = p2d_new();
p2d_append(p, v2d_new(0, 0));
p2d_append(p, v2d_new(20, 0));
p2d_append(p, v2d_new(20, 10));
p2d_append(p, v2d_new(0, 10));
p2d_close(p);
p = p->next = p2d_new();
p2d_append(p, v2d_new(2, 2));
p2d_append(p, v2d_new(2, 8));
p2d_append(p, v2d_new(18, 8));
p2d_append(p, v2d_new(18, 2));
p2d_close(p);
q = p2d_area(pl, 0.7, 0);
p2d_write_gnuplot_all(stdout, q);
EOF
expect <<EOF
0.7 0.7
19.3 0.7
19.3 9.3
0.7 9.3
0.7 0.7
1.3 1.3
1.3 8.7
18.7 8.7
18.7 1.3
1.3 1.3
EOF
###############################################################################