More or less it’s the code (or class, or whatever) that handles and resolves your character’s collisions in the world. I suppose I should loosely define what a “character controller” is before I build my case against Unity’s. Unfortunately, as previous stated Unity is also home to the world’s worst character controller. It also has a really great and active community that is the epitome of helpfulness. It takes care of a lot of the low level under the hood side of game development but still gives you enough freedom to do just about anything. You can visit their website here and download their latest version here. For any actual implementation, I’ll be using the aforementioned Unity game engine.

So since I couldn’t find anything out there to read…I figured I’d write something instead! I intend to post a few pieces here outlining what I’ve learned so far and some issues I’ve encountered. I’ve been working on a custom character controller for a couple weeks and noticed that finding any kind of reference or learning material on the subject is pretty difficult. Can anyone provide some code snippet on how to handle the velocity when it collides with the screen edge to make it bounce back? Or if there is an easier of doing this, please let me know as I'm still fairly new to this stuff.After using Unity over the years for various projects, I’ve come to two conclusions: overall it’s a terrific engine that I would recommend to anyone interested in getting into game development, and that it’s built in character controller sucks. Based on the documentations available online, I know that I can use the OnCollisionEnter2D() method when the bubble touches another game object with a collider.īut I do not know how to calculate the velocity to make it bounce back. I know it continues to move upwards because of the initial velocity I wrote. For example, when it hits the right edge of the screen, it just continues to move upwards instead of bouncing off of it. But when it hits the screen edge, it does not rebound back. Here's the problem I'm facing right now: The object spawns and moves as expected. This basically gives the bubble game object a starting velocity when it spawns. ThisBody.velocity = new Vector2(0.5f, 0.5f) In my script, I have: public Rigidbody2D thisBody I also have 4 empty game objects for the left/right/top/bottom screen edge with a Box Collider 2D In the Rigidbody component, I have Gravity Scale set to 0 since gravity is not really involved here I think. I have a game object prefab for the bubble with a Circle Collider 2D and Rigidbody2D and a custom script that I wrote. I am trying to copy the bubble screen saver behavior from Windows in Unity where there are bubbles moving across the screen and bouncing when it collides with the screen edge and/or with each other.

Bounce when touch collision unity