TestSurfacePlot/SurfacePlotVisual3D.cs

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using HelixToolkit.Wpf;
using System;
using System.IO;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Media3D;

namespace TestSurfacePlot
{
    public class SurfacePlotVisual3D : ModelVisual3D
    {
        private readonly ModelVisual3D visualChild;

        public SurfacePlotVisual3D()
        {
            visualChild = new ModelVisual3D();
            Children.Add(visualChild);
        }

        private Point3D[,] Points;
        private Brush SurfaceBrush;
        public double[,] ColorValues;
        private Point[,] TexCoords;

        public void UpdateModel()
        {
            {
                double minValue = double.MaxValue;
                double maxValue = double.MinValue;

                byte[] buffer = new byte[8];

                FileStream fs = new FileStream(@"data.dat", FileMode.Open);
                fs.Read(buffer, 0, 4);
                int originWidth = BitConverter.ToInt32(buffer, 0);
                fs.Read(buffer, 0, 4);
                int originHeight = BitConverter.ToInt32(buffer, 0);

                Points = new Point3D[originHeight, originWidth];
                TexCoords = new Point[originHeight, originWidth];

                for (int r = 0; r < originHeight; r++)
                {
                    for (int c = 0; c < originWidth; c++)
                    {
                        fs.Read(buffer, 0, 8);
                        double value = BitConverter.ToDouble(buffer, 0);
                        if (!double.IsNaN(value))
                        {
                            minValue = Math.Min(value, minValue);
                            maxValue = Math.Max(value, maxValue);
                        }

                        Points[r, c] = new Point3D(r, c, value);
                    }
                }
                fs.Close();

                double range = maxValue - minValue;
                double ratio = 100 / range;