Question How to use EntityManager. AddComponent to add a PhysicsBody component to an Entity?

How to use EntityManager. AddComponent to add a PhysicsBody component to an Entity? I want to dynamically add this thing, and I don't want to use prefabricated components. I tried this method, but reported an error. The error message is as follows:
ArgumentException: System.ArgumentException: A component with type:{0} has not been added to the entity.

 

Hi LittleWhite114,

the documentation of the physics package has a part "Creating bodies from scratch" with a full example of exactly your use case. In addition the samples on git are very helpful.

• Physics package documentation: Creating bodies in code | Unity Physics | 1.0.11 (unity3d.com)
• Physics samples on git: EntityComponentSystemSamples/PhysicsSamples at master · Unity-Technologies/EntityComponentSystemSamples (github.com))

I used it to modify the PhysicsBody at runtime (I've used SetComponentData, because my object already has a PhysicsBody and PhysicsShape):

Code (CSharp):

1. float3 newSize = new float3(Length, Height , Width);
2.                     BoxGeometry boxGeometry = new BoxGeometry
3.                     {
4.                         Size = newSize,
5.                         Center = new float3(newSize.x / 2, -newSize.y / 2, newSize.z / 2),
6.                         Orientation = quaternion.identity,
7.                         BevelRadius = 0.02f
8.                     };
9.                     BlobAssetReference<Collider> boxCollider = BoxCollider.Create(boxGeometry);
10.                     state.EntityManager.SetComponentData(newEntity, new PhysicsCollider
11.                     {
12.                         Value = boxCollider
13.                     });

 

thank you very much！

 

I have encountered another problem. My ultimate goal is to use ray detection technology to select objects with the mouse, but after adding collision objects, it is not possible. It seems that a rigid body needs to be added, but how can this rigid body be added? Thank you for your answer