public static void SetColorByHeight(vtkPolyData data, Rectangle rect)
{
double zmin = data.GetPoint(0)[2];
double zmax = zmin;
for (int i = 0; i < rect.Width * rect.Height; i++)
{
double z = data.GetPoint(i)[2];
if (z < zmin)
{
zmin = z;
}
if (z > zmax)
{
zmax = z;
}
}
//Console.WriteLine("Zmin:" + zmin + " Zmax:" + zmax);
vtkColorTransferFunction colorFunction = vtkColorTransferFunction.New();
colorFunction.AddRGBPoint(zmin, 0, 0, 1);
colorFunction.AddRGBPoint(zmax, 1, 0, 0);
//Console.WriteLine("Color:" + colorFunction.GetColor(0)[0] + " "
// + colorFunction.GetColor(0)[1] + " "
// + colorFunction.GetColor(0)[2]);
for (int i = 0; i < rect.Width * rect.Height; i++)
{
double z = data.GetPoint(i)[2];
double[] c = colorFunction.GetColor(z);
data.GetPointData().GetScalars().SetTuple3(i, c[0] * 255, c[1] * 255, c[2] * 255);
}
data.Modified();
}