I have a project I’m working on that uses only the 2D physics system. I had been working on the project and all was working great on Unity 4.5.0. I built a new PC, and decided to install the newest version of unity (4.5.2). When then running my project my physics objects are not acting at all like they previously were and several things are broken.
I uninstalled 4.5.2 and installed 4.5.1 and everything is now working correctly again. The big issue for me is that this project is for a client and I need a way to show the project to the client. (I was using the web player to easily show the client progress). but it appears that the web player is using the latest 4.5.2, so my project again is broken and doesn’t act how it should in the web player…
I’m really confused how there are not tons of other threads from people on the forums having issues with version 4.5.2 of unity?
Unity 4.5.2 incorporated a number of fixes. It is possible that your problem is as a result of these changes. Could you elaborate on what is broken?
I have created a “car” object out of hinge joints on the wheels, and a combination of spring and slider joints to connect the wheels to the cars body. Previously it worked well in that the car was dynamic, it would bounce up and down and handle terrain well. With 4.5.2 the car body seems to ignore the forces that the wheel and spring joint should be applying on it. Its almost like the car body is frozen, it won’t rotate or have any give as it collides with things. The car body simply has a polygon collider on it.
For example I have terrain that has some hills. In the working version the car can bump into the terrain a little but the car body has enough give that it will start going up the hill. In the broken version it hits the hill and just gets stuck because the car is frozen and won’t move it seems.
Unity 4.5 introduced a new 2D physics component: Wheel Joint 2D. It might be worth taking a look at this if you haven’t already. You might also find the thread here useful, it discusses making a car without the wheel joint.
Yea I tried the wheel joint originally and ended up not using it because of that thread post I believe. Guess I’ll stick with 4.5.1