unsigned LightingParser_BindLightResolveResources(
Metal::DeviceContext& context,
LightingParserContext& parserContext)
{
// bind resources and constants that are required for lighting resolve operations
// these are needed in both deferred and forward shading modes... But they are
// bound at different times in different modes
CATCH_ASSETS_BEGIN
unsigned skyTextureProjection = SkyTextureParts(parserContext.GetSceneParser()->GetGlobalLightingDesc()).BindPS(context, 11);
context.BindPS(MakeResourceList(10, ::Assets::GetAssetDep<RenderCore::Assets::DeferredShaderResource>("game/xleres/DefaultResources/balanced_noise.dds:LT").GetShaderResource()));
context.BindPS(MakeResourceList(16, ::Assets::GetAssetDep<RenderCore::Assets::DeferredShaderResource>("game/xleres/DefaultResources/GGXTable.dds:LT").GetShaderResource()));
context.BindPS(MakeResourceList(9, Metal::ConstantBuffer(&GlobalMaterialOverride, sizeof(GlobalMaterialOverride))));
return skyTextureProjection;
CATCH_ASSETS_END(parserContext)
return 0;
}
void VegetationSpawn_Prepare(
Metal::DeviceContext* context, LightingParserContext& parserContext,
const VegetationSpawnConfig& cfg, VegetationSpawnResources& res)
{
// Prepare the scene for vegetation spawn
// This means binding our output buffers to the stream output slots,
// and then rendering the terrain with a special technique.
// We can use flags to force the scene parser to render only the terrain
//
// If we use "GeometryShader::SetDefaultStreamOutputInitializers", then future
// geometry shaders will be created as stream-output shaders.
using namespace RenderCore;
auto oldSO = Metal::GeometryShader::GetDefaultStreamOutputInitializers();
ID3D::Query* begunQuery = nullptr;
auto oldCamera = parserContext.GetProjectionDesc();
CATCH_ASSETS_BEGIN
auto& perlinNoiseRes = Techniques::FindCachedBox2<SceneEngine::PerlinNoiseResources>();
context->BindGS(MakeResourceList(12, perlinNoiseRes._gradShaderResource, perlinNoiseRes._permShaderResource));
context->BindGS(MakeResourceList(Metal::SamplerState()));
// we have to clear vertex input "3", because this is the instancing input slot -- and
// we're going to be writing to buffers that will be used for instancing.
// ID3D::Buffer* nullBuffer = nullptr; unsigned zero = 0;
// context->GetUnderlying()->IASetVertexBuffers(3, 1, &nullBuffer, &zero, &zero);
context->Unbind<Metal::VertexBuffer>();
context->UnbindVS<Metal::ShaderResourceView>(15, 1);
float maxDrawDistance = 0.f;
for (const auto& m:cfg._materials)
for (const auto& b:m._buckets)
maxDrawDistance = std::max(b._maxDrawDistance, maxDrawDistance);
class InstanceSpawnConstants
{
public:
Float4x4 _worldToCullFrustum;
float _gridSpacing, _baseDrawDistanceSq, _jitterAmount;
unsigned _dummy;
Float4 _materialParams[8];
Float4 _suppressionNoiseParams[8];
} instanceSpawnConstants = {
parserContext.GetProjectionDesc()._worldToProjection,
cfg._baseGridSpacing, maxDrawDistance*maxDrawDistance, cfg._jitterAmount, 0,
{ Zero<Float4>(), Zero<Float4>(), Zero<Float4>(), Zero<Float4>(),
Zero<Float4>(), Zero<Float4>(), Zero<Float4>(), Zero<Float4>() },
{ Zero<Float4>(), Zero<Float4>(), Zero<Float4>(), Zero<Float4>(),
Zero<Float4>(), Zero<Float4>(), Zero<Float4>(), Zero<Float4>() }
};
for (unsigned mi=0; mi<std::min(cfg._materials.size(), dimof(instanceSpawnConstants._materialParams)); ++mi) {
instanceSpawnConstants._materialParams[mi][0] = cfg._materials[mi]._suppressionThreshold;
instanceSpawnConstants._suppressionNoiseParams[mi][0] = cfg._materials[mi]._suppressionNoise;
instanceSpawnConstants._suppressionNoiseParams[mi][1] = cfg._materials[mi]._suppressionGain;
instanceSpawnConstants._suppressionNoiseParams[mi][2] = cfg._materials[mi]._suppressionLacunarity;
}
context->BindGS(MakeResourceList(5, Metal::ConstantBuffer(&instanceSpawnConstants, sizeof(InstanceSpawnConstants))));
const bool needQuery = false;
if (constant_expression<needQuery>::result()) {
begunQuery = res._streamOutputCountsQuery.get();
context->GetUnderlying()->Begin(begunQuery);
}
static const Metal::InputElementDesc eles[] = {
// Our instance format is very simple. It's just a position and
// rotation value (in 32 bit floats)
// I'm not sure if the hardware will support 16 bit floats in a
// stream output buffer (though maybe we could use fixed point
// 16 bit integers?)
// We write a "type" value to a second buffer. Let's keep that
// buffer as small as possible, because we have to clear it
// before hand
Metal::InputElementDesc("INSTANCEPOS", 0, Metal::NativeFormat::R32G32B32A32_FLOAT),
// vertex in slot 1 must have a vertex stride that is a multiple of 4
Metal::InputElementDesc("INSTANCEPARAM", 0, Metal::NativeFormat::R32_UINT, 1)
};
// How do we clear an SO buffer? We can't make it an unorderedaccess view or render target.
// The only obvious way is to use CopyResource, and copy from a prepared "cleared" buffer
Metal::Copy(*context, res._streamOutputResources[1]->GetUnderlying(), res._clearedTypesResource->GetUnderlying());
unsigned strides[2] = { Stream0VertexSize, Stream1VertexSize };
Metal::GeometryShader::SetDefaultStreamOutputInitializers(
Metal::GeometryShader::StreamOutputInitializers(eles, dimof(eles), strides, 2));
SceneParseSettings parseSettings(
SceneParseSettings::BatchFilter::General,
SceneParseSettings::Toggles::Terrain);
// Adjust the far clip so that it's very close...
// We might want to widen the field of view slightly
// by moving the camera back a bit. This could help make
// sure that objects near the camera and on the edge of the screen
// get included
auto newProjDesc = AdjustProjDesc(oldCamera, maxDrawDistance);
// We have to call "SetGlobalTransform" to force the camera changes to have effect.
// Ideally there would be a cleaner way to automatically update the constants
// when the bound camera changes...
LightingParser_SetGlobalTransform(*context, parserContext, newProjDesc);
context->BindSO(MakeResourceList(res._streamOutputBuffers[0], res._streamOutputBuffers[1]));
parserContext.GetSceneParser()->ExecuteScene(context, parserContext, parseSettings, 5);
context->UnbindSO();
// After the scene execute, we need to use a compute shader to separate the
// stream output data into it's bins.
static const unsigned MaxOutputBinCount = 8;
ID3D::UnorderedAccessView* outputBins[MaxOutputBinCount];
unsigned initialCounts[MaxOutputBinCount];
std::fill(outputBins, &outputBins[dimof(outputBins)], nullptr);
std::fill(initialCounts, &initialCounts[dimof(initialCounts)], 0);
auto outputBinCount = std::min((unsigned)cfg._objectTypes.size(), (unsigned)res._instanceBufferUAVs.size());
for (unsigned c=0; c<outputBinCount; ++c) {
unsigned clearValues[] = { 0, 0, 0, 0 };
context->Clear(res._instanceBufferUAVs[c], clearValues);
outputBins[c] = res._instanceBufferUAVs[c].GetUnderlying();
}
context->BindCS(MakeResourceList(res._streamOutputSRV[0], res._streamOutputSRV[1]));
context->GetUnderlying()->CSSetUnorderedAccessViews(0, outputBinCount, outputBins, initialCounts);
class InstanceSeparateConstants
{
public:
UInt4 _binThresholds[16];
Float4 _drawDistanceSq[16];
} instanceSeparateConstants;
XlZeroMemory(instanceSeparateConstants);
StringMeld<1024> shaderParams;
unsigned premapBinCount = 0;
for (unsigned mi=0; mi<cfg._materials.size(); ++mi) {
const auto& m = cfg._materials[mi];
float combinedWeight = 0.f; // m._noSpawnWeight;
for (const auto& b:m._buckets) combinedWeight += b._frequencyWeight;
unsigned weightIterator = 0;
for (unsigned c=0; c<std::min(dimof(instanceSeparateConstants._binThresholds), m._buckets.size()); ++c) {
weightIterator += unsigned(4095.f * m._buckets[c]._frequencyWeight / combinedWeight);
instanceSeparateConstants._binThresholds[premapBinCount][0] = (mi<<12) | weightIterator;
instanceSeparateConstants._drawDistanceSq[premapBinCount][0]
= m._buckets[c]._maxDrawDistance * m._buckets[c]._maxDrawDistance;
shaderParams << "OUTPUT_BUFFER_MAP" << premapBinCount << "=" << m._buckets[c]._objectType << ";";
++premapBinCount;
}
}
for (unsigned c=premapBinCount; c<dimof(instanceSeparateConstants._binThresholds); ++c)
shaderParams << "OUTPUT_BUFFER_MAP" << c << "=0;";
shaderParams << "INSTANCE_BIN_COUNT=" << premapBinCount;
context->BindCS(MakeResourceList(
parserContext.GetGlobalTransformCB(),
Metal::ConstantBuffer(&instanceSeparateConstants, sizeof(instanceSeparateConstants))));
context->Bind(::Assets::GetAssetDep<Metal::ComputeShader>(
"game/xleres/Vegetation/InstanceSpawnSeparate.csh:main:cs_*",
shaderParams.get()));
context->Dispatch(StreamOutputMaxCount / 256);
// unbind all of the UAVs again
context->UnbindCS<Metal::UnorderedAccessView>(0, outputBinCount);
context->UnbindCS<Metal::ShaderResourceView>(0, 2);
res._isPrepared = true;
CATCH_ASSETS_END(parserContext)
if (begunQuery) {
context->GetUnderlying()->End(begunQuery);
}
// (reset the camera transform if it's changed)
LightingParser_SetGlobalTransform(*context, parserContext, oldCamera);
context->UnbindSO();
Metal::GeometryShader::SetDefaultStreamOutputInitializers(oldSO);
// oldTargets.ResetToOldTargets(context);
}
PreparedRTShadowFrustum PrepareRTShadows(
IThreadContext& context,
Metal::DeviceContext& metalContext,
LightingParserContext& parserContext,
PreparedScene& preparedScene,
const ShadowProjectionDesc& frustum,
unsigned shadowFrustumIndex)
{
SceneParseSettings sceneParseSettings(
SceneParseSettings::BatchFilter::RayTracedShadows,
~SceneParseSettings::Toggles::BitField(0),
shadowFrustumIndex);
if (!parserContext.GetSceneParser()->HasContent(sceneParseSettings))
return PreparedRTShadowFrustum();
Metal::GPUProfiler::DebugAnnotation anno(metalContext, L"Prepare-RTShadows");
auto& box = Techniques::FindCachedBox2<RTShadowsBox>(256, 256, 1024*1024, 32, 64*1024);
auto oldSO = Metal::GeometryShader::GetDefaultStreamOutputInitializers();
static const Metal::InputElementDesc soVertex[] =
{
Metal::InputElementDesc("A", 0, Metal::NativeFormat::R32G32B32A32_FLOAT),
Metal::InputElementDesc("B", 0, Metal::NativeFormat::R32G32_FLOAT),
Metal::InputElementDesc("C", 0, Metal::NativeFormat::R32G32B32A32_FLOAT),
Metal::InputElementDesc("D", 0, Metal::NativeFormat::R32G32B32_FLOAT)
};
static const Metal::InputElementDesc il[] =
{
Metal::InputElementDesc("A", 0, Metal::NativeFormat::R32G32B32A32_FLOAT),
Metal::InputElementDesc("B", 0, Metal::NativeFormat::R32G32_FLOAT),
Metal::InputElementDesc("C", 0, Metal::NativeFormat::R32G32B32A32_FLOAT),
Metal::InputElementDesc("D", 0, Metal::NativeFormat::R32G32B32_FLOAT)
};
metalContext.UnbindPS<Metal::ShaderResourceView>(5, 3);
const unsigned bufferCount = 1;
unsigned strides[] = { 52 };
unsigned offsets[] = { 0 };
Metal::GeometryShader::SetDefaultStreamOutputInitializers(
Metal::GeometryShader::StreamOutputInitializers(soVertex, dimof(soVertex), strides, 1));
static_assert(bufferCount == dimof(strides), "Stream output buffer count mismatch");
static_assert(bufferCount == dimof(offsets), "Stream output buffer count mismatch");
metalContext.BindSO(MakeResourceList(box._triangleBufferVB));
// set up the render state for writing into the grid buffer
SavedTargets savedTargets(metalContext);
metalContext.Bind(box._gridBufferViewport);
metalContext.Unbind<Metal::RenderTargetView>();
metalContext.Bind(Techniques::CommonResources()._blendOpaque);
metalContext.Bind(Techniques::CommonResources()._defaultRasterizer); // for newer video cards, we need "conservative raster" enabled
PreparedRTShadowFrustum preparedResult;
preparedResult.InitialiseConstants(&metalContext, frustum._projections);
using TC = Techniques::TechniqueContext;
parserContext.SetGlobalCB(metalContext, TC::CB_ShadowProjection, &preparedResult._arbitraryCBSource, sizeof(preparedResult._arbitraryCBSource));
parserContext.SetGlobalCB(metalContext, TC::CB_OrthoShadowProjection, &preparedResult._orthoCBSource, sizeof(preparedResult._orthoCBSource));
parserContext.GetTechniqueContext()._runtimeState.SetParameter(
StringShadowCascadeMode,
(preparedResult._mode == ShadowProjectionDesc::Projections::Mode::Ortho)?2:1);
// Now, we need to transform the object's triangle buffer into shadow
// projection space during this step (also applying skinning, wind bending, and
// any other animation effects.
//
// Each object that will be used with projected shadows must have a buffer
// containing the triangle information.
//
// We can deal with this in a number of ways:
// 1. rtwritetiles shader writes triangles out in a stream-output step
// 2. transform triangles first, then pass that information through the rtwritetiles shader
// 3. transform triangles completely separately from the rtwritetiles step
//
// Method 1 would avoid extra transformations of the input data, and actually
// simplifies some of the shader work. We don't need any special input buffers
// or extra input data. The shaders just take generic model information, and build
// everything they need, as they need it.
//
// We can also choose to reject backfacing triangles at this point, as well as
// removing triangles that are culled from the frustum.
//
Float4x4 savedWorldToProjection = parserContext.GetProjectionDesc()._worldToProjection;
parserContext.GetProjectionDesc()._worldToProjection = frustum._worldToClip;
auto cleanup = MakeAutoCleanup(
[&parserContext, &savedWorldToProjection]() {
parserContext.GetProjectionDesc()._worldToProjection = savedWorldToProjection;
parserContext.GetTechniqueContext()._runtimeState.SetParameter(StringShadowCascadeMode, 0);
});
CATCH_ASSETS_BEGIN
parserContext.GetSceneParser()->ExecuteScene(
context, parserContext, sceneParseSettings,
preparedScene, TechniqueIndex_RTShadowGen);
CATCH_ASSETS_END(parserContext)
metalContext.UnbindSO();
Metal::GeometryShader::SetDefaultStreamOutputInitializers(oldSO);
// We have the list of triangles. Let's render then into the final
// grid buffer viewport. This should create a list of triangles for
// each cell in the grid. The goal is to reduce the number of triangles
// that the ray tracing shader needs to look at.
//
// We could attempt to do this in the same step above. But that creates
// some problems with frustum cull and back face culling. This order
// allows us reduce the total triangle count before we start assigning
// primitive ids.
//
// todo -- also calculate min/max for each grid during this step
CATCH_ASSETS_BEGIN
auto& shader = ::Assets::GetAssetDep<Metal::ShaderProgram>(
"game/xleres/shadowgen/rtwritetiles.sh:vs_passthrough:vs_*",
"game/xleres/shadowgen/consraster.sh:gs_conservativeRasterization:gs_*",
"game/xleres/shadowgen/rtwritetiles.sh:ps_main:ps_*",
"OUTPUT_PRIM_ID=1;INPUT_RAYTEST_TRIS=1");
metalContext.Bind(shader);
Metal::BoundInputLayout inputLayout(Metal::InputLayout(il, dimof(il)), shader);
metalContext.Bind(inputLayout);
// no shader constants/resources required
unsigned clearValues[] = { 0, 0, 0, 0 };
metalContext.Clear(box._gridBufferUAV, clearValues);
metalContext.Bind(Techniques::CommonResources()._blendOpaque);
metalContext.Bind(Techniques::CommonResources()._dssDisable);
metalContext.Bind(Techniques::CommonResources()._cullDisable);
metalContext.Bind(Metal::Topology::PointList);
metalContext.Bind(MakeResourceList(box._triangleBufferVB), strides[0], offsets[0]);
metalContext.Bind(
MakeResourceList(box._dummyRTV), nullptr,
MakeResourceList(box._gridBufferUAV, box._listsBufferUAV));
metalContext.DrawAuto();
CATCH_ASSETS_END(parserContext)
metalContext.Bind(Metal::Topology::TriangleList);
savedTargets.ResetToOldTargets(metalContext);
preparedResult._listHeadSRV = box._gridBufferSRV;
preparedResult._linkedListsSRV = box._listsBufferSRV;
preparedResult._trianglesSRV = box._triangleBufferSRV;
return std::move(preparedResult);
}
void TerrainManager::Render(Metal::DeviceContext* context, LightingParserContext& parserContext, unsigned techniqueIndex)
{
assert(_pimpl);
auto* renderer = _pimpl->_renderer.get();
if (!renderer) return;
// we need to enable the rendering state once, for all cells. The state should be
// more or less the same for every cell, so we don't need to do it every time
TerrainRenderingContext state(
renderer->GetCoverageIds(),
renderer->GetCoverageFmts(), renderer->GetCoverageLayersCount(),
_pimpl->_cfg.EncodedGradientFlags());
state._queuedNodes.erase(state._queuedNodes.begin(), state._queuedNodes.end());
state._queuedNodes.reserve(2048);
state._currentViewport = Metal::ViewportDesc(*context);
_pimpl->CullNodes(context, parserContext, state);
renderer->CompletePendingUploads();
renderer->QueueUploads(state);
if (!_pimpl->_textures || _pimpl->_textures->GetDependencyValidation()->GetValidationIndex() > 0) {
_pimpl->_textures.reset();
_pimpl->_textures = std::make_unique<TerrainMaterialTextures>(
*context, _pimpl->_matCfg, _pimpl->_cfg.EncodedGradientFlags());
}
context->BindPS(MakeResourceList(8,
_pimpl->_textures->_srv[TerrainMaterialTextures::Diffuse],
_pimpl->_textures->_srv[TerrainMaterialTextures::Normal],
_pimpl->_textures->_srv[TerrainMaterialTextures::Specularity]));
auto mode =
(techniqueIndex==5)
? TerrainRenderingContext::Mode_VegetationPrepare
: TerrainRenderingContext::Mode_Normal;
Float3 sunDirection(0.f, 0.f, 1.f);
if (parserContext.GetSceneParser() && parserContext.GetSceneParser()->GetLightCount() > 0) {
sunDirection = parserContext.GetSceneParser()->GetLightDesc(0)._negativeLightDirection;
}
// We want to project the sun direction onto the plane for the precalculated sun movement.
// Then find the appropriate angle for on that plane.
float sunDirectionAngle;
{
auto trans = Identity<Float4x4>();
Combine_InPlace(trans, RotationZ(-_pimpl->_cfg.SunPathAngle()));
auto transDirection = TransformDirectionVector(trans, sunDirection);
sunDirectionAngle = XlATan2(transDirection[0], transDirection[2]);
}
auto shadowSoftness = Tweakable("ShadowSoftness", 15.f);
const float expansionConstant = 1.5f;
float terrainLightingConstants[] = { sunDirectionAngle / float(.5f * expansionConstant * M_PI), shadowSoftness, 0.f, 0.f };
Metal::ConstantBuffer lightingConstantsBuffer(terrainLightingConstants, sizeof(terrainLightingConstants));
context->BindPS(MakeResourceList(5, _pimpl->_textures->_texturingConstants, lightingConstantsBuffer, _pimpl->_textures->_procTexContsBuffer));
if (mode == TerrainRenderingContext::Mode_VegetationPrepare) {
// this cb required in the geometry shader for vegetation prepare mode!
context->BindGS(MakeResourceList(6, lightingConstantsBuffer));
}
state.EnterState(context, parserContext, *_pimpl->_textures, renderer->GetHeightsElementSize(), mode);
renderer->Render(context, parserContext, state);
state.ExitState(context, parserContext);
// if (_pimpl->_coverageInterfaces.size() > 0)
// parserContext._pendingOverlays.push_back(
// std::bind(
// &GenericUberSurfaceInterface::RenderDebugging, _pimpl->_coverageInterfaces[0]._interface.get(),
// std::placeholders::_1, std::placeholders::_2));
}