private void PopulateBuffer(ComputeBuffer constructedBuffer, int targetPointCount)
{
// Copy data from nodes until either all nodes are processed or quota for this step is reached
while (lastProcessedNodeIndex < queuedNodes.Count && constructedBufferItemsCount < targetPointCount)
{
if (!nodeLoader.TryGetNode(queuedNodes[lastProcessedNodeIndex++], out var node))
{
continue;
}
var count = node.Points.Length;
var afterAppendCount = constructedBufferItemsCount + count;
if (afterAppendCount > maxBufferElements)
{
Debug.LogWarning($"Total amount of points in requested nodes exceeds buffer size ({maxBufferElements.ToString()}). Truncating.");
lastProcessedNodeIndex = queuedNodes.Count;
break;
}
constructedBuffer.SetData(node.Points, 0, constructedBufferItemsCount, count);
constructedBufferItemsCount += count;
}
}
/// <summary>
/// <para>Performs as single step in buffer building process. Buffer will be ready after up to [<see cref="rebuildSteps"/>] steps.</para>
/// <para>Note that this method is not bound to update loop and has to be called externally.</para>
/// </summary>
protected void PerformBuildStep()
{
// Calculate amount of points that should be reached during this step
currentStepCount++;
var targetPointCount = (currentStepCount == rebuildSteps)
? maxBufferElements
: (int)((float)currentStepCount / rebuildSteps * maxBufferElements);
var constructedBuffer = ConstructedBuffer;
// Copy data from nodes until either all nodes are processed or quota for this step is reached
while (lastProcessedNodeIndex < queuedNodes.Count && constructedBufferItemsCount < targetPointCount)
{
if (!nodeLoader.TryGetNode(queuedNodes[lastProcessedNodeIndex++], out var node))
{
continue;
}
var count = node.Points.Length;
var afterAppendCount = constructedBufferItemsCount + count;
if (afterAppendCount > maxBufferElements)
{
Debug.LogWarning($"Total amount of points in requested nodes exceeds buffer size ({maxBufferElements.ToString()}). Truncating.");
lastProcessedNodeIndex = queuedNodes.Count;
break;
}
constructedBuffer.SetData(node.Points, 0, constructedBufferItemsCount, count);
constructedBufferItemsCount += count;
}
// This was the last step - reset progress, swap ready and under-construction buffers
if (lastProcessedNodeIndex == queuedNodes.Count)
{
lastProcessedNodeIndex = 0;
readyBufferItemsCount = constructedBufferItemsCount;
constructedBufferItemsCount = 0;
currentStepCount = 0;
bufferSwapFlag = !bufferSwapFlag;
busy = false;
}
}
