/// <inheritdoc/>
public override void Draw(RenderDrawContext context, RenderView renderView, RenderViewStage renderViewStage, int startIndex, int endIndex)
{
var commandList = context.CommandList;
foreach (var renderFeature in RenderFeatures)
{
renderFeature.Draw(context, renderView, renderViewStage, startIndex, endIndex);
}
// TODO: stackalloc?
var descriptorSetsLocal = descriptorSets.Value;
if (descriptorSetsLocal is null || descriptorSetsLocal.Length < EffectDescriptorSetSlotCount)
{
descriptorSetsLocal = descriptorSets.Value = new DescriptorSet[EffectDescriptorSetSlotCount];
}
MeshDraw currentDrawData = null;
int emptyBufferSlot = -1;
for (int index = startIndex; index < endIndex; index++)
{
var renderNodeReference = renderViewStage.SortedRenderNodes[index].RenderNode;
var renderNode = GetRenderNode(renderNodeReference);
var renderMesh = (RenderMesh)renderNode.RenderObject;
var drawData = renderMesh.ActiveMeshDraw;
// Get effect
// TODO: Use real effect slot
var renderEffect = renderNode.RenderEffect;
if (renderEffect.Effect == null)
{
continue;
}
// Bind VB
if (currentDrawData != drawData)
{
for (int slot = 0; slot < drawData.VertexBuffers.Length; slot++)
{
var vertexBuffer = drawData.VertexBuffers[slot];
commandList.SetVertexBuffer(slot, vertexBuffer.Buffer, vertexBuffer.Offset, vertexBuffer.Stride);
}
// If the mesh's vertex buffers miss any input streams, an additional input binding will have been added to the pipeline state.
// We bind an additional empty vertex buffer to that slot handle those streams gracefully.
if (emptyBufferSlot != drawData.VertexBuffers.Length)
{
commandList.SetVertexBuffer(drawData.VertexBuffers.Length, emptyBuffer, 0, 0);
emptyBufferSlot = drawData.VertexBuffers.Length;
}
if (drawData.IndexBuffer != null)
{
commandList.SetIndexBuffer(drawData.IndexBuffer.Buffer, drawData.IndexBuffer.Offset, drawData.IndexBuffer.Is32Bit);
}
currentDrawData = drawData;
}
var resourceGroupOffset = ComputeResourceGroupOffset(renderNodeReference);
// Update cbuffer
renderEffect.Reflection.BufferUploader.Apply(context.CommandList, ResourceGroupPool, resourceGroupOffset);
// Bind descriptor sets
for (int i = 0; i < descriptorSetsLocal.Length; ++i)
{
var resourceGroup = ResourceGroupPool[resourceGroupOffset++];
if (resourceGroup != null)
{
descriptorSetsLocal[i] = resourceGroup.DescriptorSet;
}
}
commandList.SetPipelineState(renderEffect.PipelineState);
commandList.SetDescriptorSets(0, descriptorSetsLocal);
// Draw
if (drawData.IndexBuffer is null)
{
if (renderMesh.InstanceCount > 0)
{
commandList.DrawInstanced(drawData.DrawCount, renderMesh.InstanceCount, drawData.StartLocation);
}
else
{
commandList.Draw(drawData.DrawCount, drawData.StartLocation);
}
}
else
{
if (renderMesh.InstanceCount > 0)
{
commandList.DrawIndexedInstanced(drawData.DrawCount, renderMesh.InstanceCount, drawData.StartLocation);
}
else
{
commandList.DrawIndexed(drawData.DrawCount, drawData.StartLocation);
}
}
}
}
/// <summary>
/// Collects render objects visibile in a view (if not previously collected before).
/// </summary>
/// <param name="view"></param>
public void TryCollect(RenderView view)
{
// Already colleted this frame?
if (view.LastFrameCollected == RenderSystem.FrameCounter)
{
return;
}
view.LastFrameCollected = RenderSystem.FrameCounter;
ReevaluateActiveRenderStages();
// Collect objects, and perform frustum culling
// TODO GRAPHICS REFACTOR Create "VisibilityObject" (could contain multiple RenderNode) and separate frustum culling from RenderSystem
// TODO GRAPHICS REFACTOR optimization: maybe we could process all views at once (swap loop between per object and per view)
// View bounds calculation
view.MinimumDistance = float.PositiveInfinity;
view.MaximumDistance = float.NegativeInfinity;
Matrix.Invert(ref view.View, out var viewInverse);
var planeNormal = viewInverse.Forward;
var pointOnPlane = viewInverse.TranslationVector + viewInverse.Forward * view.NearClipPlane;
var plane = new Plane(planeNormal, Vector3.Dot(pointOnPlane, planeNormal)); // TODO: Point-normal-constructor seems wrong. Check.
// Prepare culling mask
foreach (var renderViewStage in view.RenderStages)
{
var renderStageIndex = renderViewStage.Index;
viewRenderStageMask[renderStageIndex / RenderStageMaskSizePerEntry] |= 1U << (renderStageIndex % RenderStageMaskSizePerEntry);
}
// Create the bounding frustum locally on the stack, so that frustum.Contains is performed with boundingBox that is also on the stack
// TODO GRAPHICS REFACTOR frustum culling is currently hardcoded (cf previous TODO, we should make this more modular and move it out of here)
var frustum = new BoundingFrustum(ref view.ViewProjection);
var cullingMode = DisableCulling ? CameraCullingMode.None : view.CullingMode;
// TODO GRAPHICS REFACTOR we currently forward SceneCameraRenderer.CullingMask
// Note sure this is really a good mechanism long term (it forces to recreate multiple time the same view, instead of using RenderStage + selectors or a similar mechanism)
// This is still supported so that existing gizmo code kept working with new graphics refactor. Might be reconsidered at some point.
var cullingMask = view.CullingMask;
// Process objects
//foreach (var renderObject in RenderObjects)
//Dispatcher.ForEach(RenderObjects, renderObject =>
Dispatcher.For(0, RenderObjects.Count, () => collectorCache.Value, (index, cache) =>
{
var renderObject = RenderObjects[index];
// Skip not enabled objects
if (!renderObject.Enabled || ((RenderGroupMask)(1U << (int)renderObject.RenderGroup) & cullingMask) == 0)
{
return;
}
var renderStageMask = RenderData.GetData(RenderStageMaskKey);
var renderStageMaskNode = renderObject.VisibilityObjectNode * stageMaskMultiplier;
// Determine if this render object belongs to this view
bool renderStageMatch = false;
unsafe
{
fixed(uint *viewRenderStageMaskStart = viewRenderStageMask)
fixed(uint *objectRenderStageMaskStart = renderStageMask.Data)
{
var viewRenderStageMaskPtr = viewRenderStageMaskStart;
var objectRenderStageMaskPtr = objectRenderStageMaskStart + renderStageMaskNode.Index;
for (int i = 0; i < viewRenderStageMask.Length; ++i)
{
if ((*viewRenderStageMaskPtr++ & *objectRenderStageMaskPtr++) != 0)
{
renderStageMatch = true;
break;
}
}
}
}
// Object not part of this view because no render stages in this objects are visible in this view
if (!renderStageMatch)
{
return;
}
// Fast AABB transform: http://zeuxcg.org/2010/10/17/aabb-from-obb-with-component-wise-abs/
// Compute transformed AABB (by world)
if (cullingMode == CameraCullingMode.Frustum &&
renderObject.BoundingBox.Extent != Vector3.Zero &&
!FrustumContainsBox(ref frustum, ref renderObject.BoundingBox, view.VisiblityIgnoreDepthPlanes))
{
return;
}
// Add object to list of visible objects
// TODO GRAPHICS REFACTOR we should be able to push multiple elements with future VisibilityObject
view.RenderObjects.Add(renderObject, cache);
// Calculate bounding box of all render objects in the view
if (renderObject.BoundingBox.Extent != Vector3.Zero)
{
CalculateMinMaxDistance(ref plane, ref renderObject.BoundingBox, ref view.MinimumDistance, ref view.MaximumDistance);
}
}, cache => cache.Flush());
view.RenderObjects.Close();
}
public RenderViewRestore(RenderContext renderContext)
{
context = renderContext;
previousValue = renderContext.RenderView;
}
public void Draw(RenderDrawContext renderDrawContext, RenderView renderView, RenderStage renderStage)
{
// Sync point: draw (from now, we should execute with a graphics device context to perform rendering)
// Look for the RenderViewStage corresponding to this RenderView | RenderStage combination
var renderViewStage = RenderViewStage.Invalid;
foreach (var currentRenderViewStage in renderView.RenderStages)
{
if (currentRenderViewStage.Index == renderStage.Index)
{
renderViewStage = currentRenderViewStage;
break;
}
}
if (renderViewStage.Index == -1)
{
throw new InvalidOperationException("Requested RenderView|RenderStage combination doesn't exist. Please add it to RenderView.RenderStages.");
}
// Perform updates once per change of RenderView
foreach (var renderFeature in RenderFeatures)
{
renderFeature.Draw(renderDrawContext, renderView, renderViewStage);
}
// Generate and execute draw jobs
var renderNodes = renderViewStage.SortedRenderNodes;
var renderNodeCount = renderViewStage.RenderNodes.Count;
if (renderNodeCount == 0)
{
return;
}
if (!GraphicsDevice.IsDeferred)
{
int currentStart, currentEnd;
for (currentStart = 0; currentStart < renderNodeCount; currentStart = currentEnd)
{
var currentRenderFeature = renderNodes[currentStart].RootRenderFeature;
currentEnd = currentStart + 1;
while (currentEnd < renderNodeCount && renderNodes[currentEnd].RootRenderFeature == currentRenderFeature)
{
currentEnd++;
}
// Divide into task chunks for parallelism
currentRenderFeature.Draw(renderDrawContext, renderView, renderViewStage, currentStart, currentEnd);
}
}
else
{
// Create at most one batch per processor
int batchCount = Math.Min(Environment.ProcessorCount, renderNodeCount);
int batchSize = (renderNodeCount + (batchCount - 1)) / batchCount;
batchCount = (renderNodeCount + (batchSize - 1)) / batchSize;
// Remember state
var depthStencilBuffer = renderDrawContext.CommandList.DepthStencilBuffer;
int renderTargetCount = renderDrawContext.CommandList.RenderTargetCount;
if (renderTargets == null)
{
renderTargets = new Texture[renderDrawContext.CommandList.RenderTargets.Length];
}
for (int i = 0; i < renderTargetCount; ++i)
{
renderTargets[i] = renderDrawContext.CommandList.RenderTargets[i];
}
var viewport = renderDrawContext.CommandList.Viewport;
var scissor = renderDrawContext.CommandList.Scissor;
// Collect one command list per batch and the main one up to this point
if (commandLists == null || commandLists.Length < batchCount + 1)
{
Array.Resize(ref commandLists, batchCount + 1);
}
commandLists[0] = renderDrawContext.CommandList.Close();
Dispatcher.For(0, batchCount, () => renderDrawContext.RenderContext.GetThreadContext(), (batchIndex, threadContext) =>
{
threadContext.CommandList.Reset();
threadContext.CommandList.ClearState();
// Transfer state to all command lists
threadContext.CommandList.SetRenderTargets(depthStencilBuffer, renderTargetCount, renderTargets);
threadContext.CommandList.SetViewport(viewport);
threadContext.CommandList.SetScissorRectangle(scissor);
var currentStart = batchSize * batchIndex;
int currentEnd;
var endExclusive = Math.Min(renderNodeCount, currentStart + batchSize);
if (endExclusive <= currentStart)
{
return;
}
for (; currentStart < endExclusive; currentStart = currentEnd)
{
var currentRenderFeature = renderNodes[currentStart].RootRenderFeature;
currentEnd = currentStart + 1;
while (currentEnd < endExclusive && renderNodes[currentEnd].RootRenderFeature == currentRenderFeature)
{
currentEnd++;
}
// Divide into task chunks for parallelism
currentRenderFeature.Draw(threadContext, renderView, renderViewStage, currentStart, currentEnd);
}
commandLists[batchIndex + 1] = threadContext.CommandList.Close();
});
GraphicsDevice.ExecuteCommandLists(batchCount + 1, commandLists);
renderDrawContext.CommandList.Reset();
renderDrawContext.CommandList.ClearState();
// Reapply previous state
renderDrawContext.CommandList.SetRenderTargets(depthStencilBuffer, renderTargetCount, renderTargets);
renderDrawContext.CommandList.SetViewport(viewport);
renderDrawContext.CommandList.SetScissorRectangle(scissor);
}
}
