Documentation

Unity Engine

User Manual

Script Reference

Unity Engine

CopyCount(ComputeBuffer, ComputeBuffer, int)

Copy counter value of append/consume buffer into another buffer.
Read time 1 minuteLast updated 4 days ago

Definition

  • Type: Method
  • Namespace: UnityEngine
  • Assembly: UnityEngine.CoreModule
public static void CopyCount(ComputeBuffer src, ComputeBuffer dst, int dstOffsetBytes)

Parameters

src

ComputeBuffer
Append/consume buffer to copy the counter from.

dst

ComputeBuffer
A buffer to copy the counter to.

dstOffsetBytes

int
Target byte offset in 
dst
.

Remarks

Append/consume and counter buffers (see ComputeBufferType.Append, ComputeBufferType.Counter) keep track of the number of elements in them with a special counter variable. CopyCount takes a buffer as 
src
, and copies its counter value into 
dst
buffer at given byte offset.
This is most commonly used in conjunction with Graphics.DrawProceduralIndirect, to render arbitrary number of primitives without reading their count back to the CPU.
On DX11 there is a restriction on the 
dst
buffer - it must have been created with ComputeBufferType.Raw or ComputeBufferType.IndirectArguments type. On other platforms 
dst
can be any type.
Additional Resources: ComputeBuffer.SetCounterValue.