private void CreateScene()
{
var boxMeshGeometry3D = new Ab3d.Meshes.BoxMesh3D(new Point3D(0, 0, 0), new Size3D(BoxSize, BoxSize, BoxSize), 1, 1, 1).Geometry;
_oneMeshTriangleIndicesCount = boxMeshGeometry3D.TriangleIndices.Count;
PositionNormalTexture[] vertexBuffer;
int[] indexBuffer;
CreateMultiMeshBuffer(center: new Vector3(0, 0, 0),
size: new Vector3(XCount * (BoxSize + BoxesMargin), YCount * (BoxSize + BoxesMargin), ZCount * (BoxSize + BoxesMargin)),
xCount: XCount, yCount: YCount, zCount: ZCount,
meshGeometry3D: boxMeshGeometry3D,
vertexBuffer: out vertexBuffer,
indexBuffer: out indexBuffer);
_multiMaterialMesh = new SimpleMesh <PositionNormalTexture>(vertexBuffer, indexBuffer,
inputLayoutType: InputLayoutType.Position | InputLayoutType.Normal | InputLayoutType.TextureCoordinate);
_indexBufferLength = indexBuffer.Length;
// i1 is at 1/4 of the height of the box
_firstColorIndex = (int)(_indexBufferLength / 4);
// i2 is at 3/4 of the height
_secondColorIndex = _firstColorIndex * 3;
_multiMaterialMesh.SubMeshes = new SubMesh[]
{
new SubMesh("SubMesh1")
{
MaterialIndex = 0, StartIndexLocation = 0, IndexCount = _firstColorIndex
},
new SubMesh("SubMesh2")
{
MaterialIndex = 1, StartIndexLocation = _firstColorIndex, IndexCount = _secondColorIndex - _firstColorIndex
},
new SubMesh("SubMesh3")
{
MaterialIndex = 2, StartIndexLocation = _secondColorIndex, IndexCount = _indexBufferLength - _secondColorIndex
},
};
_disposables.Add(_multiMaterialMesh);
var materials = new Ab3d.DirectX.Material[]
{
new Ab3d.DirectX.Materials.StandardMaterial()
{
DiffuseColor = Colors.DimGray.ToColor3()
},
new Ab3d.DirectX.Materials.StandardMaterial()
{
DiffuseColor = Colors.Silver.ToColor3()
},
new Ab3d.DirectX.Materials.StandardMaterial()
{
DiffuseColor = Colors.Gold.ToColor3()
},
};
_meshObjectNode = new Ab3d.DirectX.MeshObjectNode(_multiMaterialMesh, materials);
_disposables.Add(_meshObjectNode);
// Use SceneNodeVisual3D to show SceneNode in DXViewportView
var sceneNodeVisual3D = new SceneNodeVisual3D(_meshObjectNode);
MainViewport.Children.Add(sceneNodeVisual3D);
}
private void UpdateFogUsage()
{
if (MainDXViewportView.DXScene == null) // probably WPF 3D rendering is used
{
return;
}
// First make sure that we have the StandardEffect that is used by default
if (_defaultStandardEffect == null)
{
_defaultStandardEffect = MainDXViewportView.DXScene.DXDevice.EffectsManager.GetStandardEffect();
}
// First reset the changes of previously changed SceneNodes
if (_changedDXMaterial != null)
{
_changedDXMaterial.Effect = null;
_changedDXMaterial = null;
}
if (_yellowFogWpfMaterial != null)
{
// Replace _yellowFogWpfMaterial with default YellowMaterial
var yellowMaterial = this.FindResource("YellowMaterial") as DiffuseMaterial;
foreach (var baseModelVisual3D in MainViewport.Children.OfType <BaseModelVisual3D>())
{
if (ReferenceEquals(baseModelVisual3D.Material, _yellowFogWpfMaterial))
{
baseModelVisual3D.Material = yellowMaterial;
}
}
_yellowFogWpfMaterial = null;
}
// NOTES:
// We can use two ways to use custom FogEffect:
//
// 1) Set FogEffect as StandardEffect on EffectsManager.
// StandardEffect is used when DXEngine is rendering standard WPF materials (diffuse, specular, emissive).
// This means that if we change the StandardEffect, then all standard objects will be rendered with FogEffect.
// Other objects like 3D lines will still be rendered with their special effects.
//
// 2) Set FogEffect to the Effect property on the WpfMaterial object that is a DXEngine's material object created from WPF's material.
// When setting Effect property on DXEngine's material, the material will be rendered with the specified effect (instead of StandardEffect).
// Additional notes:
// 1) EffectsManager is created when the DXDevice is created.
// This means that you cannot access it in the constructor of this class.
// If you need to change the StandardEffect (or some other setting on DXDevice) before the first frame is rendered,
// you need to use DXSceneDeviceCreated or DXSceneInitialized event handler to do that (as in this case).
Effect newStandardEffect;
if (StandardEffectRadioButton.IsChecked ?? false)
{
newStandardEffect = _fogEffect;
}
else if (RootBoxRadioButton.IsChecked ?? false)
{
newStandardEffect = _defaultStandardEffect;
// Get the DXEngine's material that is created from the WPF's Material used for BaseBoxVisual3D
var dxMaterial = Ab3d.DirectX.Materials.WpfMaterial.GetUsedDXMaterial(BaseBoxVisual3D.Material, MainDXViewportView.DXScene.DXDevice);
if (dxMaterial != null)
{
// Now we can specify the exact effect that will be used to render dxMaterial (if this is not specified, then StandardEffect is used)
dxMaterial.Effect = _fogEffect;
_changedDXMaterial = dxMaterial;
}
}
else if (ReplaceRadioButton.IsChecked ?? false)
{
newStandardEffect = _defaultStandardEffect;
// Create a clone of YellowMaterial
var yellowMaterial = this.FindResource("YellowMaterial") as DiffuseMaterial;
if (yellowMaterial != null)
{
_yellowFogWpfMaterial = yellowMaterial.Clone();
// Now create a DXEngine's material that is created from WPF's material:
var yellowFogDXEngineMaterial = new Ab3d.DirectX.Materials.WpfMaterial(_yellowFogWpfMaterial);
// Specify the exact effect that will be used to render this material (if not specified, then the StandardEffect is used)
yellowFogDXEngineMaterial.Effect = _fogEffect;
// Now that we have both WPF material and DXEngine's material,
// we can specify that whenever the _yellowFogWpfMaterial will be used (and when our DXDevice is used),
// we should use the specified yellowFogDXEngineMaterial.
// This is done with the static SetUsedDXMaterial method.
//
// TIP: The same approach can be used to use some other rendering technique to render on material - for example to use ModelColorLineEffect, ThickLineEffect or SolidColorEffect.
Ab3d.DirectX.Materials.WpfMaterial.SetUsedDXMaterial(_yellowFogWpfMaterial, yellowFogDXEngineMaterial);
// NOTE:
// Instead of calling SetUsedDXMaterial, we could also specify the DXDevice in the WpfMaterial constructor.
// This would call the SetUsedDXMaterial behind the scenes. But we did it here in the long way to better demonstrate what is going on.
// The following code would call SetUsedDXMaterial in the constructor:
// var yellowFogDXEngineMaterial = new Ab3d.DirectX.Materials.WpfMaterial(_yellowFogWpfMaterial, MainDXViewportView.DXScene.DXDevice);
// After the _yellowFogWpfMaterial is "connected" to the yellowFogDXEngineMaterial, we can assign it insetad of yellow material:
foreach (var baseModelVisual3D in MainViewport.Children.OfType <BaseModelVisual3D>())
{
if (ReferenceEquals(baseModelVisual3D.Material, yellowMaterial))
{
baseModelVisual3D.Material = _yellowFogWpfMaterial;
}
}
}
}
else
{
newStandardEffect = _defaultStandardEffect;
}
MainDXViewportView.DXScene.DXDevice.EffectsManager.SetStandardEffect(newStandardEffect);
}
private void CreateScene()
{
int xCount = 40;
int yCount = 1;
int zCount = 40;
float sphereRadius = 10;
float sphereMargin = 10;
var sphereMeshGeometry3D = new Ab3d.Meshes.SphereMesh3D(new Point3D(0, 0, 0), sphereRadius, 10).Geometry;
_oneMeshTriangleIndicesCount = sphereMeshGeometry3D.TriangleIndices.Count;
PositionNormalTexture[] vertexBuffer;
int[] indexBuffer;
var size = new Vector3(xCount * (sphereRadius + sphereMargin), yCount * (sphereRadius + sphereMargin), zCount * (sphereRadius + sphereMargin));
SubMeshesSample.CreateMultiMeshBuffer(center: new Vector3(0, 0, 0),
size: size,
xCount: xCount, yCount: yCount, zCount: zCount,
meshGeometry3D: sphereMeshGeometry3D,
vertexBuffer: out vertexBuffer,
indexBuffer: out indexBuffer);
_multiMaterialMesh = new SimpleMesh <PositionNormalTexture>(vertexBuffer, indexBuffer,
inputLayoutType: InputLayoutType.Position | InputLayoutType.Normal | InputLayoutType.TextureCoordinate);
// Create all 3 SubMeshes at the beginning.
// Though at first only the first SubMesh will be rendered (the other two have IndexCount set to 0),
// this will allow us to simply change the StartIndexLocation and IndexCount of the SubMeshes
// to show selected part without adding or removing any SubMesh (this would regenerate the RenderingQueues).
// This way the selection is almost a no-op (only changing a few integer values and rendering the scene again).
_multiMaterialMesh.SubMeshes = new SubMesh[]
{
// First sub-mesh will render triangles from the first to the start of selection (or all triangles if there is no selection)
new SubMesh("MainSubMesh1")
{
MaterialIndex = 0, StartIndexLocation = 0, IndexCount = indexBuffer.Length
},
// Second sub-mesh will render triangles after the selection (this one follows the first on to preserve the same material)
new SubMesh("MainSubMesh2")
{
MaterialIndex = 0, StartIndexLocation = 0, IndexCount = 0
},
// The third sub-mesh will render selected triangles and will use the second material for that.
new SubMesh("SelectionSubMesh")
{
MaterialIndex = 1, StartIndexLocation = 0, IndexCount = 0
},
};
_disposables.Add(_multiMaterialMesh);
// Create OctTree from vertexBuffer.
// This will significantly improve hit testing performance (check this with uncommenting the dxScene.GetClosestHitObject call in OnMouseMouse method).
_octTree = new OctTree(vertexBuffer, indexBuffer);
var materials = new Ab3d.DirectX.Material[]
{
new Ab3d.DirectX.Materials.StandardMaterial()
{
DiffuseColor = Colors.Green.ToColor3()
},
new Ab3d.DirectX.Materials.StandardMaterial()
{
DiffuseColor = Colors.Red.ToColor3()
}
};
_meshObjectNode = new Ab3d.DirectX.MeshObjectNode(_multiMaterialMesh, materials);
_disposables.Add(_meshObjectNode);
// Use SceneNodeVisual3D to show SceneNode in DXViewportView
var sceneNodeVisual3D = new SceneNodeVisual3D(_meshObjectNode);
MainViewport.Children.Add(sceneNodeVisual3D);
}
//private int _xCount = 10000;
//private int _yCount = 2000;
// Performance values for the 10000 x 2000 height map on NVIDIA 1080:
// DirectXOverlay: render time 0.25 ms (4000 FPS)
// DirectXImage - with back face rendering (bottom of the height map): render time around 14 ms (70 FPS)
// - without back face rendering: render time around 7 ms (140 FPS)
public OptimizedHeightMapGeneration()
{
InitializeComponent();
TitleTextBlock.Text += string.Format(" ({0}x{1} height values)", XCount, YCount);
// First create very simple height map that can be created immediately.
// After that we will wait until DXScene is initialized and then start a background worker
// that will generate the mesh in the background. When this is done, we will update the 3D scene.
_disposables = new DisposeList();
int xCount = XCount / 100;
int yCount = YCount / 100;
float[,] simpleHeightData;
Color4[] simplePositionColorsArray;
//GenerateSimpleHeightData(XCount, YCount, out heightData, out positionColorsArray);
//GenerateRandomHeightData(XCount, YCount, out heightData, out positionColorsArray);
GenerateSinusHeightData(xCount, yCount, null, out simpleHeightData, out simplePositionColorsArray);
var simpleHeightMapMesh = GenerateHeightMapMesh(simpleHeightData, dxDevice: null);
_simplePositionColorMaterial = GeneratePositionColorMaterial(simplePositionColorsArray, dxDevice: null);
_disposables.Add(simpleHeightMapMesh);
_disposables.Add(_simplePositionColorMaterial);
GenerateHeightMapSceneNodes(simpleHeightMapMesh, _simplePositionColorMaterial);
//GenerateHeightMapObject(heightData, positionColorsArray);
MainDXViewportView.DXSceneInitialized += delegate(object sender, EventArgs args)
{
if (MainDXViewportView.DXScene == null)
{
return; // WPF 3D rendering
}
MeshBase heightMapMesh = null;
_dxMaterial = null;
var dxDevice = MainDXViewportView.DXScene.DXDevice;
_backgroundWorker = new BackgroundWorker()
{
WorkerSupportsCancellation = true,
WorkerReportsProgress = true
};
_backgroundWorker.DoWork += delegate(object o, DoWorkEventArgs eventArgs)
{
// 1)
// Generate height map data in the background.
float[,] heightData;
Color4[] positionColorsArray;
//GenerateSimpleHeightData(XCount, YCount, out heightData, out positionColorsArray);
//GenerateRandomHeightData(XCount, YCount, out heightData, out positionColorsArray);
GenerateSinusHeightData(XCount, YCount, _backgroundWorker, out heightData, out positionColorsArray);
if (_backgroundWorker.CancellationPending)
{
return;
}
// 2)
// Generate the mesh object and initialize it with dxDevice
// This will generate DirectX resources and send them to GPU
heightMapMesh = GenerateHeightMapMesh(heightData, dxDevice);
if (_backgroundWorker.CancellationPending)
{
return;
}
_backgroundWorker.ReportProgress(95);
if (_dxMaterial != null)
{
_dxMaterial.Dispose();
}
// 3)
// Generate material with position color data and sent that to GPU
_dxMaterial = GeneratePositionColorMaterial(positionColorsArray, dxDevice);
_backgroundWorker.ReportProgress(100);
};
_backgroundWorker.ProgressChanged += delegate(object o, ProgressChangedEventArgs eventArgs)
{
GenerationProgressBar.Value = eventArgs.ProgressPercentage;
};
_backgroundWorker.RunWorkerCompleted += delegate(object o, RunWorkerCompletedEventArgs eventArgs)
{
// Clean and dispose existing models
RootContentVisual3D.Children.Clear();
_disposables.Dispose();
// Create new DisposeList
_disposables = new DisposeList();
_disposables.Add(simpleHeightMapMesh);
_disposables.Add(_simplePositionColorMaterial);
// Generate SceneNode with new heightMapMesh and dxMaterial.
// Note that this is a very fast operation
if (heightMapMesh != null && _dxMaterial != null)
{
GenerateHeightMapSceneNodes(heightMapMesh, _dxMaterial);
}
_backgroundWorker = null;
GenerationProgressBar.Visibility = Visibility.Collapsed;
MainDXViewportView.Refresh();
};
GenerationProgressBar.Value = 0;
GenerationProgressBar.Visibility = Visibility.Visible;
_backgroundWorker.RunWorkerAsync();
};
this.Unloaded += delegate(object sender, RoutedEventArgs args)
{
if (_backgroundWorker != null)
{
_backgroundWorker.CancelAsync();
}
if (_dxMaterial != null)
{
_dxMaterial.Dispose();
_dxMaterial = null;
}
if (_simplePositionColorMaterial != null)
{
_simplePositionColorMaterial.Dispose();
_simplePositionColorMaterial = null;
}
_disposables.Dispose();
MainDXViewportView.Dispose();
};
}