[SOLVED]Viewport Transform giving weird resuts. Need a fresh set of eyes.

Matt Boudreaux · 2012-03-25T10:28:17

Forgive the newbish plea for help but this is my first time using SlimDX and everything appears correct but I'm getting weird results (my quads are acting like they are being rendered straight to screenspace instead of being transformed by all the appropriate matrices). According to PIX, everything is as it should be until the viewport kicks in. For reference, I'm outputting to a panel that is within a larger form (it's a simple level editor). PIX Output: http://i.imgur.com/v9uca.png Code - Device Setup/Viewport Creation public DXRenderer(IntPtr outputHandle, System.Drawing.Size formSize) { SwapChainDescription swapDesc = new SwapChainDescription(); swapDesc.BufferCount = 1; swapDesc.Usage = Usage.RenderTargetOutput; swapDesc.OutputHandle = outputHandle; swapDesc.IsWindowed = true; swapDesc.ModeDescription = new ModeDescription(0, 0, new Rational(60, 1), Format.R8G8B8A8_UNorm); swapDesc.SampleDescription = new SampleDescription(1, 0); swapDesc.Flags = SwapChainFlags.AllowModeSwitch; swapDesc.SwapEffect = SwapEffect.Discard; if (SlimDX.Direct3D11.Device.CreateWithSwapChain(DriverType.Hardware, DeviceCreationFlags.None, swapDesc, out m_d3dDevice, out m_swapChain).IsFailure) { System.Windows.Forms.MessageBox.Show("Failed to create DX11 device."); System.Environment.Exit(1); } var factory = m_swapChain.GetParent<Factory>(); factory.SetWindowAssociation(outputHandle, WindowAssociationFlags.IgnoreAll); m_d3dContext = m_d3dDevice.ImmediateContext; m_renderTarget = new RenderTargetView(m_d3dDevice, SlimDX.Direct3D11.Resource.FromSwapChain<Texture2D>(m_swapChain, 0)); m_d3dContext.OutputMerger.SetTargets(m_renderTarget); SlimDX.Direct3D11.Viewport viewPort = new Viewport(0.0f, 0.0f, (float)formSize.Width, (float)formSize.Height, 0.0f, 1.0f); m_d3dContext.Rasterizer.SetViewports(viewPort); Camera frameCamera = new Camera(); float aspect = (float)formSize.Width / (float)formSize.Height; float fov = (float)System.Math.PI * 0.5f; frameCamera.ProjectionMatrix = SlimDX.Matrix.PerspectiveFovLH(fov, aspect, 1.0f, 1000.0f); } Shader Setup: SlimDX.Direct3D11.Device device = DXRenderer.Instance.D3DDevice; DataStream verticeStream; // Setup Index/Vertex Buffers. int vertexDeclSize = 24 * 4; verticeStream = new DataStream(vertexDeclSize, false, true); verticeStream.Write(new Vector4(0.0f, 0.0f, 0.0f, 0.0f)); verticeStream.Write(new Vector2(0.0f, 0.0f)); verticeStream.Write(new Vector4(0.0f, 1.0f, 0.0f, 0.0f)); verticeStream.Write(new Vector2(0.0f, 0.0f)); verticeStream.Write(new Vector4(1.0f, 1.0f, 0.0f, 0.0f)); verticeStream.Write(new Vector2(1.0f, 1.0f)); verticeStream.Write(new Vector4(1.0f, 0.0f, 0.0f, 0.0f)); verticeStream.Write(new Vector2(1.0f, 1.0f)); verticeStream.Position = 0; m_vertexBuffer = new SlimDX.Direct3D11.Buffer(device, verticeStream, vertexDeclSize, SlimDX.Direct3D11.ResourceUsage.Dynamic, SlimDX.Direct3D11.BindFlags.VertexBuffer, SlimDX.Direct3D11.CpuAccessFlags.Write, SlimDX.Direct3D11.ResourceOptionFlags.None, 0); verticeStream.Close(); SlimDX.DataStream indexStream = new DataStream(sizeof(UInt16) * 6, false, true); indexStream.Write((UInt16)0); indexStream.Write((UInt16)1); indexStream.Write((UInt16)2); indexStream.Write((UInt16)0); indexStream.Write((UInt16)2); indexStream.Write((UInt16)3); indexStream.Position = 0; m_indexBuffer = new SlimDX.Direct3D11.Buffer(device, indexStream, sizeof(UInt16) * 6, SlimDX.Direct3D11.ResourceUsage.Default, SlimDX.Direct3D11.BindFlags.IndexBuffer, SlimDX.Direct3D11.CpuAccessFlags.None, SlimDX.Direct3D11.ResourceOptionFlags.None, 0); indexStream.Close(); // Compile shaders SlimDX.D3DCompiler.ShaderBytecode vertexByteCode = SlimDX.D3DCompiler.ShaderBytecode.CompileFromFile("./Shaders/Sprite.fx", "VS", "vs_5_0", SlimDX.D3DCompiler.ShaderFlags.None, SlimDX.D3DCompiler.EffectFlags.None); SlimDX.D3DCompiler.ShaderSignature inputSig = SlimDX.D3DCompiler.ShaderSignature.GetInputSignature(vertexByteCode); m_vertexShader = new SlimDX.Direct3D11.VertexShader(device, vertexByteCode); m_pixelShader = new SlimDX.Direct3D11.PixelShader(device, SlimDX.D3DCompiler.ShaderBytecode.CompileFromFile("./Shaders/Sprite.fx", "PS", "ps_5_0", SlimDX.D3DCompiler.ShaderFlags.None, SlimDX.D3DCompiler.EffectFlags.None)); m_inputLayout = new SlimDX.Direct3D11.InputLayout(device, inputSig, InputLayoutManager.TextureVertexLayout); // Setup Constant Buffer and Texture Sampler State. int matrixSize = (sizeof(float) * 4 * 4); // 4 rows, each with 4 values - x,y,z,w DataStream constantStream; constantStream = new DataStream(matrixSize * 3, true, true); constantStream.Write(SlimDX.Matrix.Identity); constantStream.Write(SlimDX.Matrix.Identity); constantStream.Write(SlimDX.Matrix.Identity); constantStream.Position = 0; m_constantBuffer = new SlimDX.Direct3D11.Buffer(device, constantStream, matrixSize * 3, SlimDX.Direct3D11.ResourceUsage.Dynamic, SlimDX.Direct3D11.BindFlags.ConstantBuffer, SlimDX.Direct3D11.CpuAccessFlags.Write, SlimDX.Direct3D11.ResourceOptionFlags.None, 0); constantStream.Close(); SlimDX.Direct3D11.SamplerDescription samplerDesc = new SlimDX.Direct3D11.SamplerDescription(); samplerDesc.AddressU = SlimDX.Direct3D11.TextureAddressMode.Wrap; samplerDesc.AddressV = SlimDX.Direct3D11.TextureAddressMode.Wrap; samplerDesc.AddressW = SlimDX.Direct3D11.TextureAddressMode.Wrap; samplerDesc.ComparisonFunction = SlimDX.Direct3D11.Comparison.Never; samplerDesc.Filter = SlimDX.Direct3D11.Filter.MinMagMipLinear; samplerDesc.MinimumLod = 0.0f; samplerDesc.MaximumLod = float.MaxValue; m_samplerState = SlimDX.Direct3D11.SamplerState.FromDescription(device, samplerDesc); Actual Render call: public void RenderSprite(Texture texture, Vector3 position, Vector2 size, Vector2 TopLeft, Vector2 BottomRight) { SlimDX.Direct3D11.DeviceContext context = DXRenderer.Instance.D3DContext; context.InputAssembler.InputLayout = m_inputLayout; context.InputAssembler.PrimitiveTopology = SlimDX.Direct3D11.PrimitiveTopology.TriangleList; context.VertexShader.Set(m_vertexShader); context.VertexShader.SetConstantBuffer(m_constantBuffer, 0); context.PixelShader.Set(m_pixelShader); context.PixelShader.SetSampler(m_samplerState, 0); context.PixelShader.SetConstantBuffer(m_constantBuffer, 0); DataBox vertices = context.MapSubresource(m_vertexBuffer, SlimDX.Direct3D11.MapMode.WriteDiscard, SlimDX.Direct3D11.MapFlags.None); DataStream verticeStream = vertices.Data; // 1 - 2 // | / | // 0 - 3 verticeStream.Write(new Vector4(0.0f, 0.0f - size.Y, 0.0f, 0.0f)); verticeStream.Write(new Vector2(TopLeft.X, BottomRight.Y)); verticeStream.Write(new Vector4(0.0f, 0.0f, 0.0f, 0.0f)); verticeStream.Write(new Vector2(TopLeft.X, TopLeft.Y)); verticeStream.Write(new Vector4(0.0f + size.X, 0.0f, 0.0f, 0.0f)); verticeStream.Write(new Vector2(BottomRight.X, TopLeft.Y)); verticeStream.Write(new Vector4(0.0f + size.X, 0.0f - size.Y, 0.0f, 0.0f)); verticeStream.Write(new Vector2(BottomRight.X, BottomRight.Y)); context.UnmapSubresource(m_vertexBuffer, 0); DataBox constant = context.MapSubresource(m_constantBuffer, SlimDX.Direct3D11.MapMode.WriteDiscard, SlimDX.Direct3D11.MapFlags.None); DataStream constantStream = constant.Data; Camera camera = Camera.Instance; Matrix world = SlimDX.Matrix.Translation(position); constantStream.Write(SlimDX.Matrix.Transpose(world)); constantStream.Write(SlimDX.Matrix.Transpose(camera.ViewMatrix)); constantStream.Write(SlimDX.Matrix.Transpose(camera.ProjectionMatrix)); context.UnmapSubresource(m_constantBuffer, 0); context.InputAssembler.SetIndexBuffer(m_indexBuffer, SlimDX.DXGI.Format.R16_UInt, 0); context.InputAssembler.SetVertexBuffers(0, new SlimDX.Direct3D11.VertexBufferBinding(m_vertexBuffer, 24, 0)); context.PixelShader.SetShaderResource(new SlimDX.Direct3D11.ShaderResourceView(DXRenderer.Instance.D3DDevice, texture.Resource), 0); context.DrawIndexed(6, 0, 0); } Sorry for all the code (and some of it is poorly laid out, i.e. setting the pixel/vertex shader every time I render an object, but I was trying ANYTHING to get this thing working late last night. Hopefully someone can see what I'm obviously missing.

Graphics and GPU Programming Programming DX11

Started by AdeptStrain March 20, 2012 12:54 AM

10 comments, last by Postie 12 years, 1 month ago

AdeptStrain

406

Author

March 24, 2012 01:30 AM

BAH!

Solved it. Apparently my World Matrix wasn't properly getting set. Changed it to the following and it started working:

 

	 	   Matrix world = new Matrix();

		    world = SlimDX.Matrix.Identity;

		    SlimDX.Matrix.Translation(ref position, out world);

No idea why that vs just calling SlimDX.Matrix.Translation(<some vector3>) didn't work.

Postie

1,559

March 25, 2012 10:28 AM

Hmm that doesn't make sense, you're creating a new empty matrix, then replacing that with an identity matrix, then replacing that with a new translation matrix built from the position vector.

For the sake of my sanity, could you verify that changing that code (and only that code) back to something akin to: Matrix world = SlimDX.Matrix.Translation(position); makes the problem come back? I use SlimDX.Matrix.Translation() all the time, and if there's the potential for some odd behavior with it I'd really like to know.

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[SOLVED]Viewport Transform giving weird resuts. Need a fresh set of eyes.

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[SOLVED]Viewport Transform giving weird resuts. Need a fresh set of eyes.

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