public void Execute(RenderContext context)
{
var renderList = context.Graphics.RenderList;
// Culling
foreach (var renderItem in renderList.RenderItems)
{
renderItem.Visible = true;
if (renderItem.Renderable.IsAlwaysVisible)
{
continue;
}
if (!renderItem.Renderable.Entity.VisibleInHierarchy)
{
renderItem.Visible = false;
continue;
}
if (!context.Camera.BoundingFrustum.Intersects(renderItem.Renderable.BoundingBox))
{
renderItem.Visible = false;
continue;
}
}
foreach (var instanceData in renderList.InstanceData.Values)
{
foreach (var instancedRenderable in instanceData.InstancedRenderables)
{
instancedRenderable.Visible = true;
if (instancedRenderable.Renderable.IsAlwaysVisible)
{
continue;
}
if (!instancedRenderable.Renderable.Entity.VisibleInHierarchy)
{
instancedRenderable.Visible = false;
continue;
}
if (!context.Camera.BoundingFrustum.Intersects(instancedRenderable.Renderable.BoundingBox))
{
instancedRenderable.Visible = false;
continue;
}
}
instanceData.Update(context.GraphicsDevice);
}
var commandBuffer = context.GraphicsDevice.CommandQueue.GetCommandBuffer();
var renderPassDescriptor = new RenderPassDescriptor();
var clearColor = context.Camera.BackgroundColor.ToColorRgba();
renderPassDescriptor.SetRenderTargetDescriptor(
context.RenderTarget,
LoadAction.Clear,
clearColor);
var depthStencilBuffer = _depthStencilBufferCache.Get(
context.SwapChain.BackBufferWidth,
context.SwapChain.BackBufferHeight);
renderPassDescriptor.SetDepthStencilDescriptor(depthStencilBuffer);
var commandEncoder = commandBuffer.GetCommandEncoder(renderPassDescriptor);
// TODO: Object lights.
var lights = context.Scene.Settings.CurrentLightingConfiguration.TerrainLights;
commandEncoder.SetViewport(context.Camera.Viewport);
void doDrawPass(List <RenderListEffectGroup> effectGroups)
{
foreach (var effectGroup in effectGroups)
{
var effect = effectGroup.Effect;
effect.Begin(commandEncoder);
if (effect is IEffectMatrices m)
{
m.SetView(context.Camera.View);
m.SetProjection(context.Camera.Projection);
}
if (effect is IEffectLights l)
{
l.SetLights(ref lights);
}
if (effect is IEffectTime t)
{
t.SetTimeInSeconds(context.GameTime.TotalGameTime.Seconds);
}
foreach (var pipelineStateGroup in effectGroup.PipelineStateGroups)
{
var pipelineStateHandle = pipelineStateGroup.PipelineStateHandle;
effect.SetPipelineState(pipelineStateHandle);
foreach (var renderItem in pipelineStateGroup.RenderItems)
{
if (!renderItem.Visible)
{
continue;
}
if (effect is IEffectMatrices m2)
{
m2.SetWorld(renderItem.Renderable.Entity.Transform.LocalToWorldMatrix);
}
renderItem.RenderCallback(
commandEncoder,
effectGroup.Effect,
pipelineStateGroup.PipelineStateHandle,
null);
}
foreach (var instancedRenderItem in pipelineStateGroup.InstancedRenderItems)
{
if (instancedRenderItem.InstanceData.NumInstances == 0)
{
continue;
}
instancedRenderItem.RenderCallback(
commandEncoder,
effectGroup.Effect,
pipelineStateGroup.PipelineStateHandle,
instancedRenderItem.InstanceData);
}
}
}
}
// TODO: Culling, based on:
// - Renderable.BoundingBox
// - Renderable.VisibleInHierarchy
// - Renderable.IsAlwaysVisible
doDrawPass(renderList.Opaque);
doDrawPass(renderList.Transparent);
commandEncoder.Close();
commandBuffer.CommitAndPresent(context.SwapChain);
}
