New update causes different behavior

[pHySiQuE]

When I updated to the latest version of Newton some behavior in one my users' games changed. I have contacted the author to find out if he is manually repositioning the button, or if he is using proper physics forces. In any case, I am concerned about any change in behavior.

Old behavior:


New behavior:

[Julio Jerez]

That look really bad, what is he using for the bottom? actuator joints?

I made some changes to the joint library, some thing were expressed in negative direction for some joint and positive for some others.
so I made consistent for all joint by using the same set of base functions.
I am adding a special solver for to the engine 3.14, and there the sign is important, so I mad all joint to obey the same RHS convention so that all joint are supported by all solvers.

My guess is the actuator joints that are giving you problem because the joint parameter has the wrong sign now, these changes are necessary.

you just need to calibrate the control by changing the sign in those actuator joints.
once you made that, it should be identical of better. it should just be a sign change here and there.

[Julio Jerez]

Ok, I found the bug and I will commit the fix tonight.

[pHySiQuE]

Oh okay. I rolled Newton back for our upcoming release but I can investigate this after that.