public static vtkLookupTable Create(LutPreset preset, double rangeMin, double rangeMax)
{
var lut = new vtkLookupTable();
lut.SetTableRange(rangeMin, rangeMax);
switch (preset)
{
case LutPreset.BlueRed:
lut.SetHueRange(0.66, 1.0);
lut.SetNumberOfColors(128);
break;
case LutPreset.RedBlue:
lut.SetHueRange(1.0, 0.66);
lut.SetNumberOfColors(128);
//lut.SetNumberOfTableValues(2);
//lut.SetTableValue(0, 1.0, 0.0, 0.0, 1.0);
//lut.SetTableValue(1, 0.0, 0.0, 1.0, 1.0);
break;
case LutPreset.Rainbow:
lut.SetHueRange(0.0, 0.66);
lut.SetNumberOfColors(256);
break;
}
lut.Build();
return lut;
}
protected DatasetUnit()
{
lookupTable = vtkLookupTable.New();
lookupTable.SetNumberOfColors(100);
lookupTable.SetHueRange(0.67, 0.0);
lookupTable.Build();
scalarBarActor.SetOrientationToHorizontal();
scalarBarActor.SetLookupTable(lookupTable);
scalarBarActor.SetTitle(fieldName);
scalarBarActor.GetAnnotationTextProperty().SetColor(0, 0, 0);
scalarBarActor.GetTitleTextProperty().SetColor(0, 0, 0);
scalarBarActor.GetLabelTextProperty().SetColor(0, 0, 0);
scalarBarActor.GetAnnotationTextProperty().SetFontSize(20);
scalarBarActor.GetTitleTextProperty().SetFontSize(20);
scalarBarActor.GetLabelTextProperty().SetFontSize(20);
scalarBarActor.GetAnnotationTextProperty().SetFontFamilyToArial();
scalarBarActor.GetTitleTextProperty().SetFontFamilyToArial();
scalarBarActor.GetLabelTextProperty().SetFontFamilyToArial();
scalarBarActor.GetAnnotationTextProperty().ItalicOff();
scalarBarActor.GetTitleTextProperty().ItalicOff();
scalarBarActor.GetLabelTextProperty().ItalicOff();
scalarBarActor.GetAnnotationTextProperty().BoldOff();
scalarBarActor.GetTitleTextProperty().BoldOff();
scalarBarActor.GetLabelTextProperty().BoldOff();
scalarBarActor.SetUnconstrainedFontSize(true);
scalarBarActor.SetBarRatio(0.15);
scalarBarActor.SetNumberOfLabels(11);
}
//切片模式_初始化颜色
private void InitializeColor_Slice(ExGrid Grid)
{
m_LookupTable = vtkLookupTable.New();
m_LookupTable.SetTableRange(Grid.Min, Grid.Max);
//蓝色->红色
m_LookupTable.SetHueRange(0.667, 0);
m_LookupTable.SetNumberOfColors(100);
m_LookupTable.Build();
//线性插值透明度
m_PiecewiseFunction = vtkPiecewiseFunction.New();
m_PiecewiseFunction.AddPoint(Grid.Min, 1);
m_PiecewiseFunction.AddPoint(Grid.Max, 1);
}
//镂空模式_初始化颜色
private void InitializeColor_HollowOut(ExGrid Grid)
{
m_LookupTable = vtkLookupTable.New();
m_LookupTable.SetTableRange(Grid.Min, Grid.Max);
//蓝色->红色
m_LookupTable.SetHueRange(0.666667, 0);
m_LookupTable.SetNumberOfColors(100);
m_LookupTable.Build();
//设定标量值的颜色
m_ColorTransferFunction = vtkColorTransferFunction.New();
for (int i = 0; i < 100; i += 10)
{
var color = m_LookupTable.GetTableValue(i);
double Range = Grid.Max - Grid.Min;
m_ColorTransferFunction.AddRGBPoint(Grid.Min + i * Range / 100.0, color[0], color[1], color[2]);
}
m_ColorTransferFunction.Build();
//线性插值透明度
m_PiecewiseFunction = vtkPiecewiseFunction.New();
// [,)
InitRanges();
foreach (var range in m_IntersectRanges)
{
double Min = range.Min;
double Max = range.Max;
////由于VTK的特性，对Max进行修正
//如果透明
if (range.Transparent)
{
m_PiecewiseFunction.AddSegment(Min, Transparency_Yes, Max, Transparency_Yes);
}
//不透明
else
{
Min = Min + EPSILON;
Max = Max - EPSILON;
m_PiecewiseFunction.AddSegment(Min, Transparency_Not, Max, Transparency_Not);
}
}
}
//普通模式_初始化颜色
private void InitializeColor_Normal(ExGrid Grid)
{
m_LookupTable = vtkLookupTable.New();
m_LookupTable.SetTableRange(Grid.Min, Grid.Max);
//蓝色->红色
m_LookupTable.SetHueRange(0.667, 0);
m_LookupTable.SetNumberOfColors(100);
m_LookupTable.Build();
//设定标量值的颜色
m_ColorTransferFunction = vtkColorTransferFunction.New();
for (int i = 0; i < 100; i += 10)
{
var color = m_LookupTable.GetTableValue(i);
double Range = Grid.Max - Grid.Min;
m_ColorTransferFunction.AddRGBPoint(Grid.Min + i * Range / 100.0, color[0], color[1], color[2]);
}
m_ColorTransferFunction.Build();
//线性插值透明度
m_PiecewiseFunction = vtkPiecewiseFunction.New();
m_PiecewiseFunction.AddPoint(Grid.Min, 1);
m_PiecewiseFunction.AddPoint(Grid.Max, 1);
}
private void RenderXYZColor()
{
FileStream fs = null;
StreamReader sr = null;
String sLineBuffer;
String[] sXYZ;
char[] chDelimiter = new char[] { ' ', '\t', ';' };
double[] xyz = new double[3];
double[] rgb = new double[3];
vtkPoints points = vtkPoints.New();
vtkPoints colors = vtkPoints.New();
int cnt = 0;
try
{
// in case file must be open in another application too use "FileShare.ReadWrite"
fs = new FileStream(m_FileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
sr = new StreamReader(fs);
vtkDoubleArray colorScalor = new vtkDoubleArray();
int n = 1;
while (!sr.EndOfStream)
{
sLineBuffer = sr.ReadLine();
cnt++;
sXYZ = sLineBuffer.Split(chDelimiter, StringSplitOptions.RemoveEmptyEntries);
if (sXYZ == null || sXYZ.Length != 6)
{
MessageBox.Show("data seems to be in wrong format at line " + cnt, "Format Exception", MessageBoxButtons.OK);
return;
}
xyz[0] = double.Parse(sXYZ[0], CultureInfo.InvariantCulture) * 11100;
xyz[1] = double.Parse(sXYZ[1], CultureInfo.InvariantCulture) * 11100;
xyz[2] = double.Parse(sXYZ[2], CultureInfo.InvariantCulture);
rgb[0] = double.Parse(sXYZ[0], CultureInfo.InvariantCulture);
rgb[1] = double.Parse(sXYZ[1], CultureInfo.InvariantCulture);
rgb[2] = double.Parse(sXYZ[2], CultureInfo.InvariantCulture);
points.InsertNextPoint(xyz[0], xyz[1], xyz[2]);
colors.InsertNextPoint(rgb[0], rgb[1], rgb[2]);
colorScalor.InsertNextTuple1(n++);
}
vtkPolyData polydata = vtkPolyData.New();
polydata.SetPoints(points);
polydata.GetPointData().SetScalars(colorScalor); //设置点的Scalar(标量)属性
vtkVertexGlyphFilter glyphFilter = vtkVertexGlyphFilter.New();
glyphFilter.SetInputConnection(polydata.GetProducerPort());
vtkLookupTable lookupTable = new vtkLookupTable();
lookupTable.SetNumberOfColors(n);
// SetSetTableValue(vtkIdType indx, double r, double g, double b, double a);
Random random = new Random();
for (int i = 0; i < n; i++)
{
double[] tmp = colors.GetPoint(i);
double r = tmp[0];
double g = tmp[1];
double b = tmp[2];
lookupTable.SetTableValue(i, r, g, b, 1);
}
// Visualize
vtkPolyDataMapper mapper = vtkPolyDataMapper.New();
mapper.SetInputConnection(glyphFilter.GetOutputPort());
mapper.SetLookupTable(lookupTable);
mapper.SetScalarRange(1, n);
vtkActor actor = vtkActor.New();
actor.SetMapper(mapper);
actor.GetProperty().SetPointSize(1);
//actor.GetProperty().SetColor(1, 0.5, 0);
// add our actor to the renderer
m_Renderer.AddActor(actor);
imgPropList.Add(actor);
m_Renderer.ResetCamera();
//Rerender the screen
m_RenderWindow.Render();
m_Renderer.Render();
}
catch (IOException ex)
{
MessageBox.Show(ex.Message, "IOException", MessageBoxButtons.OK);
}
finally
{
if (sr != null)
{
sr.Close();
sr.Dispose();
sr = null;
}
}
}
public void ChangeColorNumber(int numb)
{
colorLookupTable.SetNumberOfColors(numb);
ScalarBar.SetNumberOfLabels(numb);
}
private void DrawRainBow()
{
//# First create pipeline a simple pipeline that reads a structure grid
//# and then extracts a plane from the grid. The plane will be colored
//# differently by using different lookup tables.
//#
//# Note: the Update method is manually invoked because it causes the
//# reader to read; later on we use the output of the reader to set
//# a range for the scalar values.
vtkMultiBlockPLOT3DReader pl3d = vtkMultiBlockPLOT3DReader.New();
pl3d.SetXYZFileName(@"..\..\Data\combxyz.bin");
pl3d.SetQFileName(@"..\..\Data\combq.bin");
pl3d.SetScalarFunctionNumber(100);
pl3d.SetVectorFunctionNumber(202);
pl3d.Update();
vtkDataObject pl3d_output = pl3d.GetOutput().GetBlock(0);
vtkStructuredGridGeometryFilter planeFilter = vtkStructuredGridGeometryFilter.New();
planeFilter.SetInputData(pl3d_output);
planeFilter.SetExtent(1, 100, 1, 100, 7, 7);
vtkLookupTable lut = vtkLookupTable.New();
vtkPolyDataMapper planeMapper = vtkPolyDataMapper.New();
planeMapper.SetLookupTable(lut);
planeMapper.SetInputConnection(planeFilter.GetOutputPort());
//planeMapper.SetScalarRange(pl3d_output.)
vtkActor planeActor = vtkActor.New();
planeActor.SetMapper(planeMapper);
//this creates an outline around the data
vtkStructuredGridOutlineFilter outlineFilter = vtkStructuredGridOutlineFilter.New();
outlineFilter.SetInputData(pl3d_output);
vtkPolyDataMapper outlineMapper = vtkPolyDataMapper.New();
outlineMapper.SetInputConnection(outlineFilter.GetOutputPort());
vtkActor outlineActor = vtkActor.New();
outlineActor.SetMapper(outlineMapper);
//Much of the following is commented out. To try different lookup tables.
//This create a black to white lut
//lut.SetHueRange(0, 0);
//lut.SetSaturationRange(0, 0);
//lut.SetValueRange(0.2, 1.0);
//This creates a red to blue lut
//lut.SetHueRange(0.0, 0.677);
//This creates a blue to red lue
lut.SetHueRange(0.667, 0.0);
//This creates a weird effect. the Build() method cause lookup
//table to allocate memory and create a table based on the correct
//hue, saturatioin, value, and alpha range. Here we then
//manully overwrite the value generated by the Build() method.
lut.SetNumberOfColors(256);
lut.Build();
for (int i = 0; i < 16; i++)
{
lut.SetTableValue(i * 16, (float)Color.Red.R / 256, (float)Color.Red.G / 256, (float)Color.Red.B / 256, 1);
lut.SetTableValue(i * 16 + 1, (float)Color.Green.R / 256, (float)Color.Green.G / 256, (float)Color.Green.B / 256, 1);
lut.SetTableValue(i * 16 + 2, (float)Color.Blue.R / 256, (float)Color.Blue.G / 256, (float)Color.Blue.B / 256, 1);
lut.SetTableValue(i * 16 + 3, (float)Color.Black.R / 256, (float)Color.Black.G / 256, (float)Color.Black.B / 256, 1);
}
//Create the renderwindow, the render and both actors
vtkRenderer ren = vtkRenderer.New();
vtkRenderWindow renWin = myRenderWindowControl.RenderWindow;
renWin.AddRenderer(ren);
//Add the actors to the renderer, set the backgroud
ren.AddActor(outlineActor);
ren.AddActor(planeActor);
ren.SetBackground(0.1, 0.2, 0.4);
ren.TwoSidedLightingOff();
}