feat: 添加渲染和更新部分

图形学/DirectX学习/src/D3DBox/D3DBox/ShapeApp.cpp

@@ -52,10 +52,73 @@ void ShapeApp::OnResize()
 
 void ShapeApp::Update(const GameTimer& gt)
 {
+	UpdateCamera();	// 更 View 矩阵
+
+	// 确定当前使用的帧资源索引序号和帧资源
+	mCurrFrameResourceIndex = (mCurrFrameResourceIndex + 1) % gNumFrameResources;
+	mCurrFrameResource = mFrameResources[mCurrFrameResourceIndex].get();	
+
+	// 如果当前帧资源并没有被 GPU 使用，则强制等待
+	if (mCurrFrameResource->Fence != 0 && mFence->GetCompletedValue() < mCurrFrameResource->Fence)
+	{
+		HANDLE eventHandle = CreateEventEx(nullptr, false, false, EVENT_ALL_ACCESS);
+		ThrowIfFailed(mFence->SetEventOnCompletion(mCurrFrameResource->Fence, eventHandle));
+		WaitForSingleObject(eventHandle, INFINITE);
+		CloseHandle(eventHandle);
+	}
+
+	UpdateObjectCBs();
+	UpdateMainPassCB(gt);
 }
 
 void ShapeApp::Draw(const GameTimer& gt)
 {
+	auto cmdListAlloc = mCurrFrameResource->CmdListAlloc;
+	cmdListAlloc->Reset();
+
+	if (mIsWireframe)
+	{
+		ThrowIfFailed(mCommandList->Reset(cmdListAlloc.Get(), mPSOs["opaque_wireframe"].Get()));
+	}
+	else
+	{
+		ThrowIfFailed(mCommandList->Reset(cmdListAlloc.Get(), mPSOs["opaque"].Get()));
+	}
+
+	mCommandList->RSSetViewports(1, &mScreenViewport);
+	mCommandList->RSSetScissorRects(1, &mScissorRect);
+
+	mCommandList->ResourceBarrier(1, &CD3DX12_RESOURCE_BARRIER::Transition(CurrentBackBuffer(), D3D12_RESOURCE_STATE_PRESENT, D3D12_RESOURCE_STATE_RENDER_TARGET));
+	mCommandList->ClearRenderTargetView(CurrentBackBufferView(), Colors::LightSteelBlue, 0, nullptr);
+	mCommandList->ClearDepthStencilView(DepthStencilView(), D3D12_CLEAR_FLAG_DEPTH | D3D12_CLEAR_FLAG_STENCIL, 1.0f, 0, 0, nullptr);
+
+	mCommandList->OMSetRenderTargets(1, &CurrentBackBufferView(), true, &DepthStencilView());
+
+	ID3D12DescriptorHeap* descHeaps[] = { mCbvHeap.Get() };
+	mCommandList->SetDescriptorHeaps(_countof(descHeaps), descHeaps);
+
+	mCommandList->SetGraphicsRootSignature(mRootSignature.Get());
+
+	int passCbvIndex = mPassCbvOffset + mCurrFrameResourceIndex;
+	auto passCbvHandle = CD3DX12_GPU_DESCRIPTOR_HANDLE(mCbvHeap->GetGPUDescriptorHandleForHeapStart());
+	passCbvHandle.Offset(passCbvIndex, mCbvSrvUavDescriptorSize);
+	mCommandList->SetGraphicsRootDescriptorTable(1, passCbvHandle);
+
+	DrawRenderItems(mCommandList.Get(), mOpaqueRitems);
+
+	mCommandList->ResourceBarrier(1, &CD3DX12_RESOURCE_BARRIER::Transition(CurrentBackBuffer(), D3D12_RESOURCE_STATE_RENDER_TARGET, D3D12_RESOURCE_STATE_PRESENT));
+	
+	mCommandList->Close();
+
+	ID3D12CommandList* cmdList[] = { mCommandList.Get() };
+	mCommandQueue->ExecuteCommandLists(_countof(cmdList), cmdList);
+
+	ThrowIfFailed(mSwapChain->Present(0, 0));
+
+	mCurrentBackBuffer = (mCurrentBackBuffer + 1) % SwapChainBufferCount;
+
+	mCurrFrameResource->Fence = ++mCurrentFence;
+	mCommandQueue->Signal(mFence.Get(), mCurrentFence);
 }
 
 void ShapeApp::OnMouseDown(WPARAM btnState, int x, int y)
@@ -415,3 +478,87 @@ void ShapeApp::BuildFrameResource()
 		mFrameResources.push_back(std::make_unique<FrameResource>(md3dDevice.Get(), 1, (UINT)mAllRitems.size()));
 	}
 }
+
+void ShapeApp::UpdateCamera()
+{
+	mEyePos.x = mRadius * sinf(mPhi) * cosf(mTheta);
+	mEyePos.z = mRadius * sinf(mPhi) * sinf(mTheta);
+	mEyePos.y = mRadius * cosf(mPhi);
+
+	// Build the view matrix.
+	XMVECTOR pos = XMVectorSet(mEyePos.x, mEyePos.y, mEyePos.z, 1.0f);
+	XMVECTOR target = XMVectorZero();
+	XMVECTOR up = XMVectorSet(0.0f, 1.0f, 0.0f, 0.0f);
+
+	XMMATRIX view = XMMatrixLookAtLH(pos, target, up);
+	XMStoreFloat4x4(&mView, view);
+}
+
+void ShapeApp::UpdateObjectCBs()
+{
+	auto currObjectCB = mCurrFrameResource->ObjectCB.get();
+	for (auto& e : mAllRitems)
+	{
+		if (e->NumFramesDirty > 0)
+		{
+			XMMATRIX world = XMLoadFloat4x4(&e->World);
+
+			ObjectConstants objConstants;
+			XMStoreFloat4x4(&objConstants.World, XMMatrixTranspose(world));
+
+			currObjectCB->CopyData(e->ObjCBIndex, objConstants);
+
+			e->NumFramesDirty--;
+		}
+	}
+}
+
+void ShapeApp::UpdateMainPassCB(const GameTimer& gt)
+{
+	XMMATRIX view = XMLoadFloat4x4(&mView);
+	XMMATRIX proj = XMLoadFloat4x4(&mProj);
+
+	XMMATRIX viewProj = XMMatrixMultiply(view, proj);
+	XMMATRIX invView = XMMatrixInverse(&XMMatrixDeterminant(view), view);
+	XMMATRIX invProj = XMMatrixInverse(&XMMatrixDeterminant(proj), proj);
+	XMMATRIX invViewProj = XMMatrixInverse(&XMMatrixDeterminant(viewProj), viewProj);
+
+	XMStoreFloat4x4(&mMainPassCB.View, XMMatrixTranspose(view));
+	XMStoreFloat4x4(&mMainPassCB.InvView, XMMatrixTranspose(invView));
+	XMStoreFloat4x4(&mMainPassCB.Proj, XMMatrixTranspose(proj));
+	XMStoreFloat4x4(&mMainPassCB.InvProj, XMMatrixTranspose(invProj));
+	XMStoreFloat4x4(&mMainPassCB.ViewProj, XMMatrixTranspose(viewProj));
+	XMStoreFloat4x4(&mMainPassCB.InvViewProj, XMMatrixTranspose(invViewProj));
+	mMainPassCB.EyePosW = mEyePos;
+	mMainPassCB.RenderTargetSize = XMFLOAT2((float)mClientWidth, (float)mClientHeight);
+	mMainPassCB.InvRenderTargetSize = XMFLOAT2(1.0f / mClientWidth, 1.0f / mClientHeight);
+	mMainPassCB.NearZ = 1.0f;
+	mMainPassCB.FarZ = 1000.0f;
+	mMainPassCB.TotalTime = gt.TotalTime();
+	mMainPassCB.DeltaTime = gt.DeltaTime();
+
+	auto currPassCB = mCurrFrameResource->PassCB.get();
+	currPassCB->CopyData(0, mMainPassCB);
+}
+
+void ShapeApp::DrawRenderItems(ID3D12GraphicsCommandList* cmdList, const std::vector<RenderItem*>& ritems)
+{
+	UINT objCBByteSize = d3dUtil::CalcConstantBufferByteSize(sizeof(ObjectConstants));
+
+	auto objectCB = mCurrFrameResource->ObjectCB->Resource();
+
+	for (size_t index = 0; index < ritems.size(); ++index) {
+		const auto& ri = ritems[index];
+
+		cmdList->IASetVertexBuffers(0, 1, &ri->Geo->VertexBufferView());
+		cmdList->IASetIndexBuffer(&ri->Geo->IndexBufferView());
+		cmdList->IASetPrimitiveTopology(ri->PrimitiveType);
+
+		UINT cbvIndex = mCurrFrameResourceIndex * (UINT)mOpaqueRitems.size() + ri->ObjCBIndex;
+		auto cbvHandle = CD3DX12_GPU_DESCRIPTOR_HANDLE(mCbvHeap->GetGPUDescriptorHandleForHeapStart());
+		cbvHandle.Offset(cbvIndex, mCbvSrvUavDescriptorSize);
+
+		cmdList->SetGraphicsRootDescriptorTable(0, cbvHandle);
+		cmdList->DrawIndexedInstanced(ri->IndexCount, 1, ri->StartIndexLocation, ri->BaseVertexLocation, 0);
+	}
+}

图形学/DirectX学习/src/D3DBox/D3DBox/ShapeApp.h

@@ -54,6 +54,11 @@ private:
 	void BuildRenderItems();			// 创建渲染项
 	void BuildShapeGeometry();			// 创建几何体
 	void BuildFrameResource();			// 创建帧资源
+	void DrawRenderItems(ID3D12GraphicsCommandList* cmdList, const std::vector<RenderItem*>& ritems);
+
+	void UpdateCamera();				// 更新相机坐标
+	void UpdateObjectCBs();				// 更新渲染项的 CBV
+	void UpdateMainPassCB(const GameTimer& gt);			// 更新
 
 protected:
 	std::vector<std::unique_ptr<FrameResource>> mFrameResources;