Re: Z-Buffer problems rendering a Mesh
From: Patrice Scribe (a_at_b.c)
Date: 03/04/04
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Date: Thu, 4 Mar 2004 09:30:18 +0100
Show rather the code as it is when it doesn't work. When you enable the
Zbuffer do you add the corresponding flag in the Device.Clear call (else
you'll clear only the render target, not the ZBuffer) ?
Patrice
-- "Taren" <ediego@miami.edu> a écrit dans le message de news:0D3D73E5-9A9A-463B-8AEA-75B96F5149F9@microsoft.com... > I am creating a windows app to store and display .x files. I have the application to the point where I am loading the .x files into a mesh and then rendering them to the display. I am encountering a problem that I do not know how to resolve. It looks like a z-buffer problem. When i set the zBufferEnable render state to false I get the model looking like the following 3 images. That's how it should look since there is no z buffer. When i set the ZBufferEnable to true, nothing renders to the display. I don't get any errors or exceptions, I just see the empty background. Anyone have any ideas what I am doing wrong. > > http://homer.bus.miami.edu/~ediego/render1.jpg > http://homer.bus.miami.edu/~ediego/render2.jpg > http://homer.bus.miami.edu/~ediego/render3.jpg > > I am using the spaceship 13.x file included with the DX9 samples. Here is some of the source code that I am using. > > TO CREATE THE DEVICE: > **************************************************************************** ************ > public System.Boolean createDevice(System.Windows.Forms.Control ourRenderTarget, System.Int32 iWidth, System.Int32 iHeight, Format dxFormat, System.Boolean bWindowed) > { > System.Boolean bSuccess = false; > > //* Now we need to chec to see if our adapters will support the display mode we want. > //* We only need to check this if we are trying to create a fullscreen application. > if (!bWindowed) > { > bSuccess = this.isResolutionSupported(0, iWidth, iHeight, dxFormat); > if (bSuccess == false) > { > //* We were unable to find a valid display mode. > this.addMessage("Unable to find a compatible Display Mode: " + iWidth + "x" + iHeight + " " + dxFormat.ToString(), rdMessageLog.rdLogLevel.rdLogLevelError); > return false; > } > } > > //* We have found our display mode. > //* Lets set our presentation parameters > this.m_iWidth = iWidth; > this.m_iHeight = iHeight; > this.m_dxPixelFormat = dxFormat; > this.m_bWindowed = bWindowed; > > this.m_dxPresentParams = new PresentParameters(); > this.m_ourRenderTarget = ourRenderTarget; > this.m_dxPresentParams.Windowed = this.m_bWindowed; > this.m_dxPresentParams.BackBufferCount = 1; > this.m_dxPresentParams.SwapEffect = SwapEffect.Discard; > this.m_dxPresentParams.PresentFlag = PresentFlag.None; > this.m_dxPresentParams.EnableAutoDepthStencil = true; > this.m_dxPresentParams.AutoDepthStencilFormat = Direct3D.DepthFormat.D16; > this.m_dxPresentParams.PresentFlag = PresentFlag.None; > > > if (m_bWindowed) > { > //* If we are displaying in a windowed environemnt then get the curent display mode. > DisplayMode dxCurrentMode = Manager.Adapters[0].CurrentDisplayMode; > > this.m_dxPresentParams.BackBufferWidth = this.m_ourRenderTarget.ClientRectangle.Right - ourRenderTarget.ClientRectangle.Left; > this.m_dxPresentParams.BackBufferHeight = this.m_ourRenderTarget.ClientRectangle.Bottom - ourRenderTarget.ClientRectangle.Top; > this.m_dxPresentParams.BackBufferFormat = dxCurrentMode.Format; > this.m_dxPresentParams.FullScreenRefreshRateInHz = 0; > this.m_dxPresentParams.PresentationInterval = PresentInterval.Immediate; > this.m_dxPresentParams.DeviceWindow = ourRenderTarget; > } > else > { > m_dxPresentParams.BackBufferWidth = this.m_iWidth; > m_dxPresentParams.BackBufferHeight = this.m_iHeight; > m_dxPresentParams.BackBufferFormat = this.m_dxPixelFormat; > } > > //* Lets create our device. > this.m_dxDevice = new Microsoft.DirectX.Direct3D.Device(0, DeviceType.Hardware, ourRenderTarget, CreateFlags.SoftwareVertexProcessing, this.m_dxPresentParams); > > return true; > } > > > > TO LOAD THE FILE INTO A MESH: > **************************************************************************** **************************************************** > public System.Boolean loadMesh(Direct3D.Device dxDevice, System.String sFilename) > { > //* Check to see if the filename is valid and that the file exists. > if (sFilename == null || !System.IO.File.Exists(sFilename) ) > { > //* The file does not exist. > this.addMessage("Invalid filename specified: " + sFilename, rdMessageLog.rdLogLevel.rdLogLevelError); > return false; > } > > try > { > //* Store the filename in the instance > this.m_filename = sFilename; > > //* The file does exist. Let's load it. > m_mesh = Direct3D.Mesh.FromFile(sFilename, > Direct3D.MeshFlags.SystemMemory, > dxDevice, > out m_extMaterials); > > if (this.m_mesh == null) > { > //* Something bad happened. > this.addMessage("Unable to load mesh: " + sFilename, rdMessageLog.rdLogLevel.rdLogLevelError); > return false; > } > > //* Check to see if the mesh has normals. If it doesn't then lets > //* compute them. > if ((this.m_mesh.VertexFormat & Direct3D.VertexFormats.Normal) != Direct3D.VertexFormats.Normal) > { > //* Create a copy of the loaded mesh > Direct3D.Mesh xTmpMesh = this.m_mesh.Clone(this.m_mesh.Options.Value, this.m_mesh.VertexFormat | Direct3D.VertexFormats.Normal, dxDevice); > > //* Compute the normals > xTmpMesh.ComputeNormals(); > > //* Dispose of the original and reference the new mesh with the normals > this.m_mesh.Dispose(); > this.m_mesh = xTmpMesh; > } > > > //* Allocate the space to store the materials and textures > m_materials = new Direct3D.Material[this.m_extMaterials.Length]; > m_textures = new Direct3D.Texture[this.m_extMaterials.Length]; > > //* Setup the materials and the textures for the mesh > for (int i = 0; i < this.m_extMaterials.Length; i++) > { > this.m_materials[i] = this.m_extMaterials[i].Material3D; > this.m_materials[i].Ambient = this.m_materials[i].Diffuse; > > // Create the texture > this.m_textures[i] = this.loadTextureFromFile(dxDevice, m_extMaterials[i].TextureFilename); > System.Diagnostics.Debug.WriteLine("Texture = " + m_extMaterials[i].TextureFilename); > } > > } > catch (System.NullReferenceException e) > { > > > this.addMessage("Null Refernece Exception occured: " + e.Message, rdMessageLog.rdLogLevel.rdLogLevelError); > return false; > > } > catch (System.Exception e) > { > this.addMessage("Unknown exception occured: " + e.Message, rdMessageLog.rdLogLevel.rdLogLevelError); > return false; > } > > return true; > } > > > > TO RENDER THE MESH: > **************************************************************************** ***************************************************** > //* Set some global render states > this.m_dxGrafixEnv.Device.RenderState.ZBufferEnable = false; > this.m_dxGrafixEnv.Device.RenderState.CullMode = Direct3D.Cull.None; > this.m_dxGrafixEnv.Device.RenderState.Ambient = System.Drawing.Color.White; > this.m_dxGrafixEnv.Device.RenderState.FillMode = Direct3D.FillMode.Solid; > > > > // Now we're ready to recieve and process Windows messages. > while (!this.m_dxGrafixEnv.isDeviceNull()) > { > //* We need to do a few more things here. > //* We need to add a few functions to render the scene. > try > { > this.m_dxGrafixEnv.Device.BeginScene(); > this.m_dxGrafixEnv.Device.Clear(ClearFlags.Target, Color.White, 1.0f, 0); > > System.Single siAspectRatio = System.Convert.ToSingle(this.pnlModelView.Height) / System.Convert.ToSingle(this.pnlModelView.Width); > > //* Check the objectto render to see if we need to do anything with it. > > if (this.m_objectType == ArtifactManager.frmMain.rdRenderTpye.rdD3DMesh && > this.m_mesh != null) > { > //* Let's get the radius of the mesh so that we can adjust the > //* view to encompass the whole object. > System.Single siObjectRadius = this.m_mesh.Radius; > System.Diagnostics.Debug.WriteLine("Radius of mesh: " + " = " + siObjectRadius); > > //* Set our projection matrix > this.m_dxGrafixEnv.setProjectionMatrix( System.Convert.ToSingle(Math.PI / 4), > siAspectRatio, > /*siObjectRadius / 64.0f,*/ > 1.0f, > siObjectRadius * 200.0f); > /* > 0.0f, > 100.0f); > */ > > //* Set our view > this.m_dxGrafixEnv.setViewMatrix( new DirectX.Vector3(0, 0, 0 - (siObjectRadius + 8) ), > new DirectX.Vector3(0, 0, 0), > new DirectX.Vector3(0, 1, 0)); > > //* Render the 3D Mesh > m_mesh.renderMesh(this.m_dxGrafixEnv.Device); > > } > > > this.m_dxGrafixEnv.Device.EndScene(); > this.m_dxGrafixEnv.Device.Present(); > > //* Spin the scene around the y-axis. > this.m_dxGrafixEnv.Device.Transform.World = Microsoft.DirectX.Matrix.RotationY(System.Environment.TickCount / 800.0f ); > > } > catch (System.NullReferenceException e) > { > //* A null reference exceptin occured while rendering the scene. > this.m_dxGrafixEnv.addMessage(e.Message, rdMessageLog.rdLogLevel.rdLogLevelError); > return; > } > > System.Windows.Forms.Application.DoEvents(); > }
- Next message: Romain THOMAS: "Re: load a mesh from a resource file in VB.NET"
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- In reply to: Taren: "Z-Buffer problems rendering a Mesh"
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