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Intersecting only at endpoints is fine and doesn't require any work

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Erica Fischer
2024-02-23 09:32:25 -08:00
parent 9279c8e034
commit aeba5d604c
1 changed files with 6 additions and 1 deletions
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polygon.cpp
+6 -1
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@@ -265,6 +265,11 @@ bool intersect_collinear(std::vector<segment> &segs, size_t s1, size_t s2) {
}
bool intersect(std::vector<segment> &segs, size_t s1, size_t s2) {
if ((segs[s1].first == segs[s2].second && segs[s1].second != segs[s2].first) ||
(segs[s1].first != segs[s2].second && segs[s1].second == segs[s2].first)) {
return true; // they intersect only at one endpoint; nothing to do
}
auto intersections = get_line_intersection(segs[s1].first.x, segs[s1].first.y,
segs[s1].second.x, segs[s1].second.y,
segs[s2].first.x, segs[s2].first.y,
@@ -398,7 +403,7 @@ void snap_round(std::vector<segment> &segs, long long extent) {
std::sort(transitions.begin(), transitions.end());
for (size_t i = 0; i < transitions.size(); i++) {
printf("transition %zu: y %lld, kind %d, seg %zu\n", i, transitions[i].y, transitions[i].kind, transitions[i].segment);
// printf("transition %zu: y %lld, kind %d, seg %zu\n", i, transitions[i].y, transitions[i].kind, transitions[i].segment);
}
// do the scan