bit masks for collision etc. design/use

@lozzajp wrote:

I am thinking of using a bit mask to make collision design a bit easier. Here is an example, but this could be anything say different types of enemies and only certain ones may collide and hurt the player.

        [Flags]
        public enum BitMask
        {
            None = 0,
            Ground = 1,
            Sand = 2,
            Water = 4,
            // etc. above could be say zombie, dragon etc for damage collision.
        }

Is an enum the right way to go about this? I imagine say my player to have something like the following

class player
{

int collidables = 6; // this is represented as 0110, so can collide with ground, sand but not water, none.

}

The idea then is later in collision checking I can look at all surrounding blocks and they will have their type, say ground so I can do something like:

if (block.Type | player.collidables) return true;

Does anyone have any guidance or resources to use a pattern like this?

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