Weapon Alpha

[TheShyGuy]

If you're daring enough, you might even look into Sweep and Prune to speed it up http://jitter-physics.com/wordpress/?tag...-and-prune .. but you probably won't need it for this game.

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For SAT, you use the dot product project both collision masks onto each possible separating axis. Projecting onto an axis creates 1D min/max values which define the extents of a mask. To detect an overlap, you check the min/max of both objects' projections.

In the end, you get a collision system that allows collision against any kind of convex or composite-convexed shape---which includes slopes.