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Correct answer ClayUUID

This is an intrinsic problem with how browsers draw anti-aliased lines in the canvas element. The only mitigation is to make your vectors slightly overlap.

https://petewarden.com/2011/01/30/a-fundamental-bug-in-html5s-canvas/

graphics - How to avoid seams between filled areas in canvas? - Stack Overflow

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ClayUUIDCorrect answer
Legend
May 14, 2019

This is an intrinsic problem with how browsers draw anti-aliased lines in the canvas element. The only mitigation is to make your vectors slightly overlap.

https://petewarden.com/2011/01/30/a-fundamental-bug-in-html5s-canvas/

graphics - How to avoid seams between filled areas in canvas? - Stack Overflow