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I'm trying to remember the English name for a memory model of a map built exclusively for handling collision detection. I think this is especially frequent in tile-based platform games.

I believe the Spanish term for it is "Mapa de durezas".

If you have a Super Mario tilemap like this:

    C     +        'P' = Pipe
         +++       '+' = Brick
        +++++      '@' = Ground
   P   +++++++     'C' = Cloud
 @@@@@@@@@@@@@@@@  ' ' = Air

Then the <ENGLISH EXPRESSION THAT I'M LOOKING FOR> of that map would be:

          *       '*' = Solid
         ***      ' ' = Traversable
   *   *******

Any clues?

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up vote 6 down vote accepted

The term you are looking for may be "collision map".

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I was about to answer 'collision layer', then realised it's the same as this. – The Communist Duck Nov 27 '10 at 14:49
Thanks a lot! It feels so obvious now ... – egarcia Nov 29 '10 at 9:01
For future reference, a more common term IMO is a Collision Hull. – Dalin Seivewright Jun 24 '12 at 5:57

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