[Solved] How to SetFixedArray, back to entity?

HI,

Well, of coruse there is no such thing as SetFixedArray.
In contrast, you can get

Code (CSharp):

1. MyComponent data = EntityManager.GetComponentData <MyComponent> ( entity ) ;

and set

Code (CSharp):

1. EntityManager.SetComponentData ( entity, data ) ;

I can of course fetch fixed array

Code (CSharp):

1. EntityManager.GetFixedArray <MyStruct> ( entity ) ;

As an example into native array

Code (CSharp):

1. Unity.Collections.NativeArray <MyStruct> a_myStructs = entityManager.GetFixedArray <MyStruct> ( entity ) ;

Then after manipulating with array,

how do I set it back to entity?
Since there is no SetFixedArray.

 

You can only get a fixed array. Once you have the fixed array, you can get and set elements just as you would a native array. IIRC, getting a fixed array doesn't get a copy of the data, so any change you make is permanent.

 

This was my thought too that data is accessed and set by reference, rather just copy data.
But for some reason, when I get element with index from fixed array and set value, then get the array again, to check if value has been set and stored, debugger says it is old value instead.

So it a bit troubling me.

For example,

Code (CSharp):

1. a_pointOctreeNodeChildren = entityManager.GetFixedArray <PointOctreeNodeChild> ( entity ) ;
2. pointOctreeNodeChild = a_pointOctreeNodeChildren [0] ;
3. pointOctreeNodeChild.centerOffset = new float3 (1,1,2) ;
4.  
5. // test check, just after set float3
6. a_pointOctreeNodeChildren = entityManager.GetFixedArray <PointOctreeNodeChild> ( entity ) ;
7. pointOctreeNodeChild.centerOffset = a_pointOctreeNodeChildren [0] // test check ;

test check pointOctreeNodeChild.centerOffset is not the same, when new float3 has been set.

I may missing something

 

Ok I have figured out. Still thinking in OOP categories, that is my problem ^.^
I need think more abut data, rather references.

Instead

Code (CSharp):

1. a_pointOctreeNodeChildren = entityManager.GetFixedArray <PointOctreeNodeChild> ( entity ) ;
2. pointOctreeNodeChild = a_pointOctreeNodeChildren [0] ;
3. pointOctreeNodeChild.centerOffset = new float3 (1,1,2) ;

I need

Code (CSharp):

1. a_pointOctreeNodeChildren = entityManager.GetFixedArray <PointOctreeNodeChild> ( entity ) ;
2. pointOctreeNodeChild = a_pointOctreeNodeChildren [0] ;
3. pointOctreeNodeChild.centerOffset = new float3 (1,1,2) ;
4. a_pointOctreeNodeChildren [0] = pointOctreeNodeChild ;

Which basically adds extra line

Code (CSharp):

1. a_pointOctreeNodeChildren [0] = pointOctreeNodeChild ;