CompuServe Thread

Bill, >> No friction… That's surprising. How do objects with mass in motion ever expend their energy, and come to a rest ? How does a ball roll, if not for the friction with the surface it's rolling on ? Etc, etc.. We have a drag function that can cancel some of the velocity. It is difficult to stop something completely. We may have something in place to assist in this area. As fas as the ball is concerned, logical angular velocity can be set to start the roll in the proper direction. Every collision that is detected can still cause rotation, and produce a very realistic looking rotation. If you examine the fun.zip file I uploaded, I chose the wrong angular velocity to start the ball down the slope, but the rest of the balls rotations are from contacts with other objects. << Rigid body. However, an object chopped into many smaller objects may break apart after a collision. >> >>Is this triggered automatically ? If an object is chopped into pieces, let's say with booleans, yet the resultant pieces are pasted back together (by repositioning them if necessary), then the Key>Dyno mode will work great. The pieces would remain intact with keyframed positions, until contact is made by another object. Imagine a wrecking ball hitting chunks of a building. Brent