Resolved How to change gravity on collision with ECS?

Hi new to unity and DOTS/ECS. I need to change gravity of a cube when a ball hits it. There is plenty of youtube tutorials showing how to do this but they all use JobComponentSystem to inherrit for their system classes.When I type JobComponentSystem in place of SystemBase its gets a could not be found error with red underline. I am using Unity.Jobs, Physics etc.

İs there any other way to make this without using JobComponentSystem or why is it not working? Am I missing some package or usings?

 

I created a simple example that creates a gravity change with the stateful collision events form the physics example repo.

You can find it here, hope that helps:

https://github.com/Occuros/DotsPhysicsExample/tree/main

 

Cool repository, what does the lambda expression do in

Code (CSharp):

1. public Entity EntityA => Entities.EntityA;

seems like an expression bodied member but I can't understand this specific case

 

Thank you so much, that realy helped.

 

This is simply to keep the EntityPair internal and create a getter method.

This code part is taken over from the unity physics examples which can be found here:

https://github.com/Unity-Technologies/EntityComponentSystemSamples/tree/master/PhysicsSamples

It is a real treasure for examples and code snippets.