Check if a point is inside of a triangle

Processing Beginners
1

Hi,
how can I check if a point is inside of a triangle? Is there a mathematical formula for it?
And what about any N sided shape?

And assuming this is true:
image

Thank you!

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2

JeffreyThompson.org/collision-detection/tri-point.php

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3

does this work with any shape? It should right?

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4

I didn’t test it, sorry. :confounded:

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5

It should. the only problem now is to sort the points to form a ring.

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