using System;
using System.Drawing;
using Nevron.Chart;
using Nevron.Chart.ThinWeb;
using Nevron.GraphicsCore;

namespace SurfaceWebApplication
{
 public partial class _Default : System.Web.UI.Page
 {
  protected void Page_Load(object sender, EventArgs e)
  {
   if (!NThinChartControl1.Initialized)
   {
    NThinChartControl1.BackgroundStyle.FrameStyle.Visible = false;
    NThinChartControl1.Settings.JitterMode = JitterMode.Enabled;
    NThinChartControl1.Settings.ShapeRenderingMode = ShapeRenderingMode.HighSpeed;

    NThinChartControl1.Controller.Tools.Clear();
    NThinChartControl1.Controller.Tools.Add(new NPanelSelectorTool());
    NThinChartControl1.Controller.Tools.Add(new NTrackballTool());

    // set a chart title
    NLabel title = NThinChartControl1.Labels.AddHeader("Grid Surface with Custom Colors");
    title.TextStyle.FontStyle = new NFontStyle("Times New Roman", 14, FontStyle.Italic);
    title.TextStyle.FillStyle = new NColorFillStyle(Color.Blue);
    title.TextStyle.ShadowStyle.Type = ShadowType.LinearBlur;

    // setup chart
    NChart chart = NThinChartControl1.Charts[0];
    chart.Enable3D = true;
    chart.Width = 60.0f;
    chart.Depth = 60.0f;
    chart.Height = 25.0f;
    chart.Projection.SetPredefinedProjection(PredefinedProjection.PerspectiveTilted);
    chart.LightModel.SetPredefinedLightModel(PredefinedLightModel.ShinyTopLeft);

    // setup axes
    NOrdinalScaleConfigurator ordinalScale = (NOrdinalScaleConfigurator)chart.Axis(StandardAxis.PrimaryX).ScaleConfigurator;
    ordinalScale.MajorGridStyle.SetShowAtWall(ChartWallType.Floor, true);
    ordinalScale.MajorGridStyle.SetShowAtWall(ChartWallType.Back, true);
    ordinalScale.DisplayDataPointsBetweenTicks = false;

    ordinalScale = (NOrdinalScaleConfigurator)chart.Axis(StandardAxis.Depth).ScaleConfigurator;
    ordinalScale.MajorGridStyle.SetShowAtWall(ChartWallType.Floor, true);
    ordinalScale.MajorGridStyle.SetShowAtWall(ChartWallType.Left, true);
    ordinalScale.DisplayDataPointsBetweenTicks = false;

    // add the surface series
    NGridSurfaceSeries surface = new NGridSurfaceSeries();
    chart.Series.Add(surface);

    surface.ShadingMode = ShadingMode.Smooth;
    surface.FillMode = SurfaceFillMode.CustomColors;
    surface.FrameMode = SurfaceFrameMode.Mesh;
    surface.ShadingMode = ShadingMode.Smooth;
    surface.FillMode = SurfaceFillMode.CustomColors;
    surface.FrameMode = SurfaceFrameMode.None;
    surface.FrameColorMode = SurfaceFrameColorMode.CustomColors;
    surface.FrameStrokeStyle.Color = Color.Red;
    surface.FrameStrokeStyle.Width = new NLength(4);

    surface.Data.UseColors = true;
    surface.Data.SetGridSize(50, 50);

    // define a custom palette
    surface.Palette.Clear();
    surface.Palette.Add(-3, Color.DarkOrange);
    surface.Palette.Add(-2.5, Color.Orange);
    surface.Palette.Add(-1, Color.LightGreen);
    surface.Palette.Add(0, Color.Turquoise);
    surface.Palette.Add(2, Color.Blue);
    surface.Palette.Add(3, Color.Purple);
    surface.Palette.Add(4, Color.Red);

    // generate data
    GenerateSurfaceData(surface);
   }
  }

  private void GenerateSurfaceData(NGridSurfaceSeries surface)
  {
   double y, x, z;
   int nCountX = surface.Data.GridSizeX;
   int nCountZ = surface.Data.GridSizeZ;

   const double dIntervalX = 50.0;
   const double dIntervalZ = 50.0;
   double dIncrementX = (dIntervalX / nCountX);
   double dIncrementZ = (dIntervalZ / nCountZ);

   z = -(dIntervalZ / 2);

   float semiWidth = (float)Math.Min(nCountX / 2, nCountZ / 2);
   Color startColor = Color.Red;
   Color endColor = Color.Green;

   int centerX = nCountX / 2;
   int centerZ = nCountZ / 2;

   for (int j = 0; j < nCountZ; j++, z += dIncrementZ)
   {
    x = -(dIntervalX / 2);

    for (int i = 0; i < nCountX; i++, x += dIncrementX)
    {
     y = (x * z / 64.0) - Math.Sin(z / 2.4) * Math.Cos(x / 2.4);
     y = Math.Abs(y);
     double tmp = (1 - x * x - z * z);
     y -= tmp * tmp * 0.000006;

     surface.Data.SetValue(i, j, y);

     int dx = centerX - i;
     int dz = centerZ - j;
     float distance = (float)Math.Sqrt(dx * dx + dz * dz);
     surface.Data.SetColor(i, j, InterpolateColors(startColor, endColor, distance / semiWidth));
    }
   }
  }

  public static Color InterpolateColors(Color color1, Color color2, float factor)
  {
   if (factor > 1.0f)
    factor = 1.0f;

   int num1 = ((int)color1.R);
   int num2 = ((int)color1.G);
   int num3 = ((int)color1.B);

   int num4 = ((int)color2.R);
   int num5 = ((int)color2.G);
   int num6 = ((int)color2.B);

   byte num7 = (byte)((((float)num1) + (((float)(num4 - num1)) * factor)));
   byte num8 = (byte)((((float)num2) + (((float)(num5 - num2)) * factor)));
   byte num9 = (byte)((((float)num3) + (((float)(num6 - num3)) * factor)));

   return Color.FromArgb(num7, num8, num9);
  }
 }
}