public void SetDefaultColor()
{
vtkUnsignedCharArray cellColors = new vtkUnsignedCharArray();
cellColors.SetNumberOfComponents(3);
int cellNum = this.GetMapper().GetInput().GetNumberOfCells();
cellColors.SetNumberOfTuples(cellNum);
for (int i = 0; i < cellNum; ++i)
{
cellColors.SetTuple3(i, this.m_defaultColor[0], this.m_defaultColor[1], this.m_defaultColor[2]);
}
this.GetMapper().GetInput().GetCellData().SetScalars(cellColors);
vtkUnsignedCharArray ptColors = new vtkUnsignedCharArray();
ptColors.SetNumberOfComponents(3);
int ptNum = this.GetMapper().GetInput().GetNumberOfPoints();
ptColors.SetNumberOfTuples(ptNum);
for (int i = 0; i < ptNum; i++)
{
ptColors.SetTuple3(i, this.m_defaultColor[0], this.m_defaultColor[1], this.m_defaultColor[2]);
}
this.GetMapper().GetInput().GetPointData().SetScalars(ptColors);
// this.GetMapper().SetScalarModeToUsePointData();
this.GetMapper().SetScalarModeToUseCellData();
this.GetMapper().Update();
}
/// <summary>
/// 当有点和cell被选择是更新颜色
/// </summary>
public override void UpdateSelectedColor()
{
///cell
if (m_selectedCellsIds != null && m_selectedCellsIds.Count > 0)
{
vtkUnsignedCharArray colors = new vtkUnsignedCharArray();
colors.SetNumberOfComponents(3);
int cellNum = this.GetMapper().GetInput().GetNumberOfCells();
colors.SetNumberOfTuples(cellNum);
for (int i = 0; i < cellNum; ++i)
{
colors.SetTuple3(i, m_defaultColor [0], m_defaultColor [1], m_defaultColor [2]);
}
foreach (int cellID in m_selectedCellsIds.Keys)
{
colors.SetTuple3(cellID, ModelUtils.SelectedColor[0], ModelUtils.SelectedColor[1],
ModelUtils.SelectedColor[2]);
}
this.GetMapper().GetInput().GetCellData().SetScalars(colors);
}
///point
else if (m_selectedPointsIds != null && m_selectedPointsIds.Count > 0)
{
vtkUnsignedCharArray ptcolors = new vtkUnsignedCharArray();
ptcolors.SetNumberOfComponents(3);
int ptNum = this.GetMapper().GetInput().GetNumberOfPoints();
ptcolors.SetNumberOfTuples(ptNum);
for (int i = 0; i < ptNum; ++i)
{
ptcolors.SetTuple3(i, m_defaultColor[0], m_defaultColor[1], m_defaultColor[2]);
}
foreach (int ptid in m_selectedPointsIds.Keys)
{
ptcolors.SetTuple3(ptid, ModelUtils.SelectedColor[0], ModelUtils.SelectedColor[1], ModelUtils.SelectedColor[2]);
}
this.GetMapper().SetScalarModeToUsePointData();
this.GetMapper().GetInput().GetPointData().SetScalars(ptcolors);
//this.GetProperty().SetPointSize(4);
//this.GetProperty().SetRepresentationToPoints();
}
this.GetMapper().Update();
}
private void ColoredElevationMap()
{
// Create a grid of points (height/terrian map)
vtkPoints points = vtkPoints.New();
uint GridSize = 20;
double xx, yy, zz;
for (uint x = 0; x < GridSize; x++)
{
for (uint y = 0; y < GridSize; y++)
{
xx = x + vtkMath.Random(-.2, .2);
yy = y + vtkMath.Random(-.2, .2);
zz = vtkMath.Random(-.5, .5);
points.InsertNextPoint(xx, yy, zz);
}
}
// Add the grid points to a polydata object
vtkPolyData inputPolyData = vtkPolyData.New();
inputPolyData.SetPoints(points);
// Triangulate the grid points
vtkDelaunay2D delaunay = vtkDelaunay2D.New();
#if VTK_MAJOR_VERSION_5
delaunay.SetInput(inputPolyData);
#else
delaunay.SetInputData(inputPolyData);
#endif
delaunay.Update();
vtkPolyData outputPolyData = delaunay.GetOutput();
double[] bounds = outputPolyData.GetBounds();
// Find min and max z
double minz = bounds[4];
double maxz = bounds[5];
Debug.WriteLine("minz: " + minz);
Debug.WriteLine("maxz: " + maxz);
// Create the color map
vtkLookupTable colorLookupTable = vtkLookupTable.New();
colorLookupTable.SetTableRange(minz, maxz);
colorLookupTable.Build();
// Generate the colors for each point based on the color map
vtkUnsignedCharArray colors = vtkUnsignedCharArray.New();
colors.SetNumberOfComponents(3);
colors.SetName("Colors");
Debug.WriteLine("There are " + outputPolyData.GetNumberOfPoints()
+ " points.");
#if UNSAFE // fastest way to fill color array
colors.SetNumberOfTuples(outputPolyData.GetNumberOfPoints());
unsafe {
byte *pColor = (byte *)colors.GetPointer(0).ToPointer();
for (int i = 0; i < outputPolyData.GetNumberOfPoints(); i++)
{
double[] p = outputPolyData.GetPoint(i);
double[] dcolor = colorLookupTable.GetColor(p[2]);
Debug.WriteLine("dcolor: "
+ dcolor[0] + " "
+ dcolor[1] + " "
+ dcolor[2]);
byte[] color = new byte[3];
for (uint j = 0; j < 3; j++)
{
color[j] = (byte)(255 * dcolor[j]);
}
Debug.WriteLine("color: "
+ color[0] + " "
+ color[1] + " "
+ color[2]);
*(pColor + 3 * i) = color[0];
*(pColor + 3 * i + 1) = color[1];
*(pColor + 3 * i + 2) = color[2];
}
}
#else
for (int i = 0; i < outputPolyData.GetNumberOfPoints(); i++)
{
double[] p = outputPolyData.GetPoint(i);
double[] dcolor = colorLookupTable.GetColor(p[2]);
Debug.WriteLine("dcolor: "
+ dcolor[0] + " "
+ dcolor[1] + " "
+ dcolor[2]);
byte[] color = new byte[3];
for (uint j = 0; j < 3; j++)
{
color[j] = (byte)(255 * dcolor[j]);
}
Debug.WriteLine("color: "
+ color[0] + " "
+ color[1] + " "
+ color[2]);
colors.InsertNextTuple3(color[0], color[1], color[2]);
//IntPtr pColor = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(byte)) * 3);
//Marshal.Copy(color, 0, pColor, 3);
//colors.InsertNextTupleValue(pColor);
//Marshal.FreeHGlobal(pColor);
}
#endif
outputPolyData.GetPointData().SetScalars(colors);
// Create a mapper and actor
vtkPolyDataMapper mapper = vtkPolyDataMapper.New();
#if VTK_MAJOR_VERSION_5
mapper.SetInputConnection(outputPolyData.GetProducerPort());
#else
mapper.SetInputData(outputPolyData);
#endif
vtkActor actor = vtkActor.New();
actor.SetMapper(mapper);
// get a reference to the renderwindow of our renderWindowControl1
vtkRenderWindow renderWindow = renderWindowControl1.RenderWindow;
// renderer
vtkRenderer renderer = renderWindow.GetRenderers().GetFirstRenderer();
// set background color
renderer.SetBackground(0.2, 0.3, 0.4);
// add our actor to the renderer
renderer.AddActor(actor);
}
