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missing triangle #109

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christophegithubtts opened this issue Dec 7, 2022 · 2 comments
Closed

missing triangle #109

christophegithubtts opened this issue Dec 7, 2022 · 2 comments
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duplicate enhancement help wanted

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@christophegithubtts
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Hello
I have noticed that earcut outputs only 6 triangles instead of 7 from the following polygon
bug
bug.txt

I have also tried to offset all coordinates to make them relative to the first point but that does not solve the issue.
So i believe there is a bug which is quite surprising since the input polygon is very simple !

I hope someone can investigate this issue
@christophegithubtts
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Also note that GLU tesselator outputs 7 triangles as expected

@mrgreywater
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mrgreywater commented Dec 7, 2022 •
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This is known behavior. Earcut cleans up colinear points while triangulating.

image

Duplicate of mapbox/earcut#74 #100

@mrgreywater mrgreywater closed this as not planned Won't fix, can't repro, duplicate, stale Dec 7, 2022
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@mrgreywater @christophegithubtts