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SAT Collision Response Finding Edge

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Hi All


I am trying to follow the Metanet tutorial which shows a great method of disregarding the "inside edges" of a bunch of tiles so as to eliminate unwanted collisions.


Please forgive me, but,.. What is the best method for determining the edge that we are colliding with? Currently I am using the MTD to reverse-lookup the edge we are projecting out of but that seems wrong and likely to break under certain circumstances. 


If anyone has a better solution I would love to hear it.




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