That is a physical engine for the Flash, with a lot of resources even, I will mention some of them:
You can create of surface or entities with.
* Line - the union of 2 vertexes an extremity, can happens of the object to pass on him in case if moves around very fast her direction.
* Box - Collision with box.
* Point - Collision or contraction with a point, it will usually be used to create orientation for objects, as for a wood hill where you have them sustentation and the support would be the point.
* Circle - That was not able to lack, as the own name already says used for collision in circles used usually for characters in games.
* dis and obDis - it calculates the speed of two entities.
* velocityAng and pulseAng - it Adds the speed according to the located angle.
* angleSkew - I don't remember
A very good resource in this engine is "Group".
In him you can still create several platforms using the same engine that is better the same characters, this way you can create a system of two players with the screen divided without any problems is selects the division field.
Another resource is the capacity ne manipulation the camera in the game, like you she can also do she works in a movable surface being sensitive to sudden movements.
Jean Carlo Deconto