The GetData method retrieves data from the GPU buffer into a specified span. This method is useful for transferring data from the GPU back to the CPU for further processing or analysis. The method is generic and can handle any type of data specified by T.
To use the GetData method, you need to have a GpuBuffer instance that contains the data you want to retrieve. You must also have a Span<T> prepared to receive the data. The method will copy the data from the GPU buffer into the provided span.
Ensure that the span is appropriately sized to hold the data being retrieved. The size of the span should match the number of elements you intend to copy from the buffer.
// Define a data structure
struct MyData
{
public float Value;
}
// Create a GPU buffer with 8 elements
using (var buffer = new GpuBuffer<MyData>(8))
{
// Pass the buffer to a compute shader
ComputeShader.Attributes.Set("myData", buffer);
// Dispatch the shader
ComputeShader.Dispatch();
// Prepare a span to receive the data
Span<MyData> dataSpan = new MyData[8];
// Retrieve the data from the GPU
buffer.GetData(dataSpan);
// Process the retrieved data
foreach (var data in dataSpan)
{
// Example processing
Console.WriteLine(data.Value);
}
}