Slide on collision behavior

[hawkwind]

Does anyone have an example or article on how to handle colliding, at an angle, with say a wall.  I would like to slide along the wall instead of stopping

[Catharsis]

Does anyone have an example or article on how to handle colliding, at an angle, with say a wall.  I would like to slide along the wall instead of stopping

You need 3 things:
- collision point   (tuple3f)
- original end point (tuple3f)
- colliding plane normal (vector3f)

The new end destination is projected by the normal of the colliding plane.

some psuedo code for the process using the vecmath library.

1   2   3   4   5

projectVec = new Vector3f(); newEndPoint = new Tuple3f(); projectVec.sub(origEndPoint, collidePoint); newEndPoint.scaleAdd(-projectVec.dot(collidingPlaneNormal), collidingPlaneNormal, origEndPoint);

This should work... Of course optimize it for your need. Also remember that the new end point also needs to be checked for a collision between the 1st colliding point as well.