public override void Do(IDemoChartControl chartControl)
{
// Generates surface positions.
const int resolution = 50;
const float r = 0.5f;
var center = new Vector3F(0.5f);
var vertex = new Vector3F[resolution * resolution];
var index = 0;
for (var i = 0; i < resolution; i++)
{
for (var k = 0; k < resolution; k++)
{
double t = Math.PI * i / (resolution - 1);
double f = Math.PI * 2 * k / (resolution - 1);
vertex[index++] = new Vector3F((float)(r * Math.Sin(t) * Math.Cos(f)), (float)(r * Math.Sin(t) * Math.Sin(f)), (float)(r * Math.Cos(t))) + center;
}
}
// Section geometry.
var complexGeometry = new CustomVolumeGeometry(new VolumeMesh(vertex, vertex, GridHelper.GetStructuredTriangleListIndices(0, resolution, resolution, 1)));
// 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));
// Byte, Short, Float types are supported.
var reader = new ByteIntensityImage3DReader(data, size, size, new OneAxisBounds(data.Min(), data.Max()));
// Create volume section render data.
var section = new VolumeSection
{
// Set section data reader.
Reader = reader,
// Set section geometry.
Geometry = complexGeometry,
// Set section interpolation type.
InterpolationType = VolumeInterpolationType.Linear,
// Set name.
Name = "Section"
};
// Enable 3D axis.
chartControl.Axes.IsAxes3DVisible = true;
// Set chart data source.
chartControl.DataSource = new RenderData[] { section };
}
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.
var reader = new ByteIntensityImage3DReader(data, size, size, new OneAxisBounds(data.Min(), data.Max()));
// 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.
var geometry = new BoxVolumeGeometry
{
Origin = Vector3F.Zero,
Size = new Vector3F(1f),
};
// Initialize ray-casting.
var rayCasting = new VolumeRayCasting
{
// Setup it's reader. We'll reuse it for section.
Reader = reader,
// Setup ray-casting geometry.
Geometry = geometry,
// Interpolation type between voxels/
InterpolationType = VolumeInterpolationType.Linear,
// 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,
// Threshold for transparent areas that will no be visible for hit testing.
// 0 will increase picking performance due to item will be picked by bounding box.
HitTestThreshold = 0.25f,
// The same as HitTestThreshold, but for highlighting.
HighlightThreshold = 0.25f,
// Global value transparency scale.
ValueScale = 0.3f,
// Set name.
Name = "Volume",
// Don't forget to enable depth-test since we want to visualize section in the ray-casting.
IsDepthTestEnabled = true
};
List <RenderData> renderDatas = new List <RenderData>();
void SubmitSection(float relativeLocation, int id)
{
// Initialize volume visual section that takes control over section presentation.
var visualSection = new VolumeVisualPlaneSection
{
// Specify it's parent geometry as ray-casting geometry we want to cross.
ParentGeometry = geometry,
// Setup section plane origin.
Origin = new Vector3F(relativeLocation),
// Setup section plane normal.
Normal = new Vector3F(1, 1, 1),
OutlineThickness = 2.0f,
OutlineColor = Colors.Black,
IsOutlineVisible = true,
FillColor = new Color4(Colors.Blue, 100),
IsFillVisible = false,
Name = $"Visual {id}"
};
renderDatas.Add(visualSection);
// Initialize volume section render data.
var section = new VolumeSection
{
// Setup reader.
Reader = reader,
// Link the section geometry to it's visual section geometry.
Geometry = visualSection.SectionGeometry,
Name = $"Section {id}"
};
renderDatas.Add(section);
}
// Bounding box.
var boundingCube = new Cube
{
Size = new Vector3F(1f),
Position = new Vector3F(0.5f),
Color = Colors.Black,
PresentationType = PrimitivePresentationType.Wireframe,
Name = "Bounds"
};
renderDatas.Add(boundingCube);
// Add sections.
SubmitSection(0.25f, 0);
SubmitSection(0.5f, 1);
SubmitSection(0.75f, 2);
// Place ray-casting as last item to enable depth-test.
renderDatas.Add(rayCasting);
// Decrease multisampling level to improve interaction experience.
chartControl.Multisampling = Multisampling.Low2X;
chartControl.Axes.IsAxes3DVisible = true;
// Set chart data source.
chartControl.DataSource = renderDatas;
}