public override void Do(IDemoChartControl chartControl) { // Demo volumetric binary data from resources. byte[] data = Properties.Resources.skull; // Size of data is the same in all 3 dimensions. var size = (int)Math.Round(Math.Pow(data.Length, 1d / 3d)); // Link to data. Several rendering techniques can use the same data. For reader we should specify link to binary data, slice size, and value axis bounds. // For dynamic updates of data you can implement your own reader, basic reader interface provide neccessary methods for updating separate data regions. // Byte, Short, Float types are supported. reader = new ByteIntensityImage3DReader(data, size, size, new OneAxisBounds(data.Min(), data.Max())); // Initialization of rendering technique. var rayCasting = new VolumeIsoRayCasting { // Link to data. Several rendering techniques can use the same data. For reader we should specify link to binary data, slice size, and value axis bounds. // For dynamic updates of datayou can implement your own reader, basic reader interface provide neccessary methods for updating separate data regions. Reader = reader, // Geometry specify bounding box to that volume data will be fitted. Geometry can be more complex than just box. // Mostly it does nothave limits, you can specify even sphere. Geometry = new BoxVolumeGeometry { Origin = Vector3F.Zero, Size = new Vector3F(1f), }, // Parameter for ray casting technique that will specify how much steps will be on a each ray. // Directly effects performance and render quality. By default it is calculated automatically. SamplingStepCount = size, // Interpolation type between voxels. InterpolationType = VolumeInterpolationType.Linear, // Property that define value level for isosurface. IsoValue = reader.ValueRange.Min + (reader.ValueRange.Max - reader.ValueRange.Min) * 0.5f, // Specify iso-surface color. Color = new Color4(Colors.Red, 125), // For isosurface there is no difference which value is setted. Only 0 or another from 0 have sence. // 0 will increase picking performance due to item will be picked by bounding box. HitTestThreshold = 0.25f, // Set name. Name = "Volume" }; // Bounding box. var cube = new Cube { Size = new Vector3F(1f), Position = new Vector3F(0.5f), Color = Colors.Red, PresentationType = PrimitivePresentationType.Wireframe, Name = "Bounds" }; // Decrease multisampling level to improve interaction experience. chartControl.Multisampling = Multisampling.Low2X; // Setup chart data source. chartControl.DataSource = new RenderData[] { rayCasting, cube }; // Start animation. animationHelper.Start( (argument) => { if (argument > reader.ValueRange.Max) { argument = reader.ValueRange.Min; } return(argument); }, (argument) => { rayCasting.IsoValue = argument; }, reader.ValueRange.Min, 2f, 40); }
public override void Do(IDemoChartControl chartControl) { // Order-Independent transparency requres additional GPU resources, it should be used only when neccessary. // Multisample antialiasing and control resolution have significant effect to OIT performance. chartControl.IsOitEnabled = true; // Demo volumetric binary data from resources var data = Properties.Resources.skull; // Size of data is the same in all 3 dimensions var size = (int)Math.Round(Math.Pow(data.Length, 1d / 3d)); // Link to data. Several rendering techniques can use the same data. For reader we should specify link to binary data, slice size, and value axis bounds. // For dynamic updates of data you can implement your own reader, basic reader interface provide neccessary methods for updating separate data regions. // Byte, Short, Float types are supported. The reader will be used for both ray-casting for efficient memory usage. var reader = new ByteIntensityImage3DReader(data, size, size, new OneAxisBounds(data.Min(), data.Max())); // Create volume geometry object (we'll reuse it for both ray-castings for efficient memory usage). var geometry = new BoxVolumeGeometry { Origin = Vector3F.Zero, Size = new Vector3F(1f) }; float ComputeRelativeIsoValue(float relativeValue) => reader.ValueRange.Min + (reader.ValueRange.Max - reader.ValueRange.Min) * relativeValue; VolumeIsoRayCasting CreateRayCasting(float relativeLevel, Color4 color, string name) { return(new VolumeIsoRayCasting { // Set ray-casting data reader. Reader = reader, // Set ray-casting border geometry. Geometry = geometry, // Set value interpolation type. InterpolationType = VolumeInterpolationType.Linear, // Set iso-value. IsoValue = ComputeRelativeIsoValue(relativeLevel), // Set surface color. Color = color, // Set hit-test threshold value. HitTestThreshold = 0.25f, // Set sampling step count. SamplingStepCount = 500, // Set name. Name = name }); } // Create first ray-casting. VolumeIsoRayCasting rayCasting = CreateRayCasting(0.4f, new Color4(Colors.Red, 125), "Volume 1"); // Create second ray-casting. VolumeIsoRayCasting rayCasting2 = CreateRayCasting(0.15f, new Color4(Colors.White, 125), "Volume 2"); // Create internal cube. var cube = new Cube { Size = new Vector3F(0.5f), Position = new Vector3F(0.5f), Color = new Color4(Colors.Green, 150), Name = "Cube" }; // Create border cube. var borderCube = new Cube { Size = new Vector3F(1f), Position = new Vector3F(0.5f), Color = Colors.Red, PresentationType = PrimitivePresentationType.Wireframe, Name = "Bounds" }; // Decrease multisampling level to improve interaction experience. chartControl.Multisampling = Multisampling.Low2X; // Set chart data source. chartControl.DataSource = new RenderData[] { rayCasting, cube, borderCube, rayCasting2 }; }