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));
// Very simple sphere generation algorithm.
const int resolution = 50;
const float r = 0.5f;
var center = new Vector3F(0.5f);
var vertex = new Vector3F[resolution * resolution];
int index = 0;
for (var i = 0; i < resolution; i++)
{
// We use here inversed order due to triangle list indicies generation algorythm.
// It is very important to use correct counterclockwise triangle indices generation for raycasting.
for (int k = resolution - 1; k >= 0; k--)
{
var t = Math.PI * i / (resolution - 1);
var 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)));
// Initialization of rendering technique.
var rayCasting = new VolumeRayCasting
{
//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())),
Geometry = complexGeometry,
//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,
//Global value transparency scale
ValueScale = 0.5f
};
// Decrease multisampling level to improve interaction experience.
chartControl.Multisampling = Multisampling.Low2X;
// Setup chart options.
chartControl.Axes.IsAxes3DVisible = true;
// Setup chart data source.
chartControl.DataSource = rayCasting;
}
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 };
}
