Cant Readback or Assign Buffer TSL

Questions
1

I am trying to, create a buffer, change values in it, and read it back. The below code snippet compiles but when reading back the buffer is showing i haven’t changed any values.

Here are my questions?
Why is the TSL code below not changing the values of the buffer?
What is the difference between an attributeArray and instancedArray?
Is the way I am reading it and doing this the expected workflow?

Really I am struggling to understand these topics.
-Readback through out the TSL workflow
and the differences between these

BufferAttribute
StorageBufferAttribute
InstancedBufferAttribute
StorageInstancedBufferAttribute

  // Create a compute array with 5 elements
  const count = 12;
  const bufferAttributeArray = new THREE.BufferAttribute(new Float32Array(count), 3);
  const positionBuffer = TSL.attributeArray(bufferAttributeArray.array, 'float');
  
  // Define compute function - square the index value
  const computeSquare = Fn(() => {
    positionBuffer.element(0).assign(-1.0)
  })().compute(1)
  await renderer.computeAsync(computeSquare)
  
    const results = bufferAttributeArray.array;
    console.log('Computed values:', Array.from(results));
2 
const random = new Float32Array( particles_count * 3 )
const randomBuffer = instancedArray( random, 'vec3' );
this.cpuArray = new Float32Array( await this.renderer.getArrayBufferAsync( randomBuffer.value ) );
2 Likes
3

Perfect that was what i am looking for