OxyPlotにHeatMapSeriesというのがある
OxyPlotにHeatMapSeriesというのがあるというのを知った．これまでは，Bitmapで自分で描いていた．
Bitmapで自分で描くより楽だ．例えばここのようなサンプルが良い．
下は参考ページのやり方・名前の取り方をほぼそのまま参照している．Windows Forms用に少し手直しが入っているのと，linearColorAxis1.Palette = OxyPalettes.Gray(10);を追加しているところくらいが異なる．（参考ではRainbowになっている？）
縦横に正弦波が0.5 秒おきに流れていく（感じ）．
using OxyPlot;
using OxyPlot.Axes;
using OxyPlot.Series;
using OxyPlot.WindowsForms;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace HeatmapTest
{
private OxyPlot.WindowsForms.PlotView plotView1;
private PlotModel plotModelSpectrogram = new PlotModel();
public HeatMapSeries heatMapSeries1 = new HeatMapSeries();
private Double[,] Data = new Double[240, 250];
private double t = 0;
private System.Windows.Forms.Timer timer1;
public Form1()
{
InitializeComponent();
this.plotView1 = new OxyPlot.WindowsForms.PlotView();
this.plotView1.Dock = System.Windows.Forms.DockStyle.Fill;
this.plotView1.Location = new System.Drawing.Point(0, 0);
this.plotView1.Name = "plotView1";
this.plotView1.PanCursor = System.Windows.Forms.Cursors.Hand;
this.plotView1.Size = new System.Drawing.Size(633, 362);
this.plotView1.TabIndex = 0;
this.plotView1.Text = "plotView1";
this.plotView1.ZoomHorizontalCursor = System.Windows.Forms.Cursors.SizeWE;
this.plotView1.ZoomRectangleCursor = System.Windows.Forms.Cursors.SizeNWSE;
this.plotView1.ZoomVerticalCursor = System.Windows.Forms.Cursors.SizeNS;
this.Controls.Add(this.plotView1);
plotModelSpectrogram.Title = "TEST";
var linearColorAxis1 = new LinearColorAxis();
linearColorAxis1.Palette = OxyPalettes.Gray(10);
linearColorAxis1.Position = AxisPosition.Right;
linearColorAxis1.Minimum = 0.0;
linearColorAxis1.Maximum = 100;
plotModelSpectrogram.Axes.Add(linearColorAxis1);
var linearAxis1 = new LinearAxis();
linearAxis1.Position = AxisPosition.Bottom;
linearAxis1.IsAxisVisible = false;
linearAxis1.IsZoomEnabled = false;
plotModelSpectrogram.Axes.Add(linearAxis1);
// Dummy
var linearAxis_a = new LinearAxis();
linearAxis_a.Position = AxisPosition.Bottom;
linearAxis_a.Minimum = 0.0;
linearAxis_a.Maximum = 120.0;
linearAxis_a.Title = "Time s";
linearAxis_a.IsZoomEnabled = false;
plotModelSpectrogram.Axes.Add(linearAxis_a);
var linearAxis2 = new LinearAxis();
linearAxis2.Position = AxisPosition.Left;
linearAxis2.IsAxisVisible = false;
linearAxis2.IsZoomEnabled = false;
plotModelSpectrogram.Axes.Add(linearAxis2);
// Dummy
var linearAxis_b = new LinearAxis();
linearAxis_b.Position = AxisPosition.Left;
linearAxis_b.Minimum = 0.0;
linearAxis_b.Maximum = 1000.0;
linearAxis_b.Title = "Frequency kHz";
linearAxis_b.IsZoomEnabled = false;
plotModelSpectrogram.Axes.Add(linearAxis_b);
heatMapSeries1.Data = new double[240, 250];
heatMapSeries1.X0 = 0.0;
heatMapSeries1.X1 = 100.0;
heatMapSeries1.Y0 = 0.0;
heatMapSeries1.Y1 = 1000.0;
plotModelSpectrogram.Series.Add(heatMapSeries1);
this.plotView1.Model = plotModelSpectrogram;
this.timer1 = new Timer();
this.timer1.Interval = 500;
this.timer1.Enabled = true;
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
}
private void timer1_Tick(object sender, EventArgs e)
{
PlotSpectrogram();
}
private void AddLastData(Double[] data)
{
for (int i = 0; i < Data.GetLength(0) - 1; i++)
{
for (int j = 0; j < Data.GetLength(1); j++)
{
Data[i, j] = Data[i + 1, j];
}
}
for (int j = 0; j < Data.GetLength(1); j++)
{
Data[Data.GetLength(0) - 1, j] = data[j];
}
var pldata = new double[240, 250];
Array.Copy(Data, pldata, Data.Length);
heatMapSeries1.Data = pldata;
}
public void PlotSpectrogram()
{
Double[] data = new Double[Data.GetLength(1)];
for (int i = 0; i < data.Length; i++)
{
data[i] = (50.0 + 20.0 * Math.Sin(0.2 * i) + 20.0 * Math.Sin(t));
}
t += 0.5;
AddLastData(data);
plotModelSpectrogram.InvalidatePlot(true);
}
}
}
