C#绘制实时曲线的方法

本文实例为大家分享了c#绘制实时曲线的具体代码，供大家参考，具体内容如下

1.要做一个调试工具，采集传感器数据并显示。绘制曲线注意坐标反转，线条的张力即可。项目中的曲线是从右往左显示的，线条的坐标都放在list里了，效果如下图：

2.上代码

public class drawingcurve  {    private graphics graphics; //graphics 类提供将对象绘制到显示设备的方法    private bitmap bitmap; //位图对象    private int timeline = 60;//60s    private int canvaswidth = 600;//画布长度    private int slicecount = 0;//刻度分段个数 = timeline    private int xslice = 10;//x轴刻度分端宽度    private int xsliceheight = 10;//x轴刻度高度    private float tension = 0.5f; //张力系数    private bool showx = true;    private bool showy = true;    private bool showz = true;    //queue<pointf> que = new queue<pointf>();//曲线fifo    /// <summary>    /// 构造函数    /// </summary>    public drawingcurve() {      this.xslice = this.canvaswidth / timeline;    }    /// <summary>    /// 绘制画布    /// </summary>    /// <param name="width"></param>    /// <param name="height"></param>    /// <param name="points"></param>    /// <returns></returns>    public bitmap drawcanvas(int width, int height,list<float> points)    {      if (bitmap != null)      {        bitmap.dispo();        bitmap = null;      }      bitmap = new bitmap(width, height);      graphics = graphics.fromimage(bitmap);      graphics.fillrectangle(brushes.black, new rectangle(0, 0, width, height));      graphics.transform = new matrix(1, 0, 0, -1, 0, 0);//y轴向上为正，x向右为      graphics.translatetransform(0, height / 2, matrixorder.append);           pen pen = new pen(color.red, 1);      pen.dashstyle = dashstyle.custom;      pen.dashpattern = new float[] { 2, 2 };      graphics.drawline(pen, new point(0, height / 4), new point(width, height / 4));      graphics.drawline(pen, new point(0, height / -4), new point(width, height / -4));      graphics.drawline(new pen(color.greenyellow,1), new point(0, 0), new point(width, 0));      graphics.drawstring("0", new font("vendara",10), brushes.white, new point(0, -15));      graphics.drawstring("+", new font("vendara", 10), brushes.white, new point(0, height / 4));      graphics.drawstring("-", new font("vendara", 10), brushes.white, new point(0, height / -4-15));      graphics.transform = new matrix(1, 0, 0, 1, 0, 0);//y轴向上为正，x向右为      graphics.translatetransform(0, height / 2, matrixorder.append);      graphics.drawstring("-59s", new font("vendara", 8), brushes.white, new point(0, height/2-15));      graphics.drawstring("0s", new font("vendara", 8), brushes.white, new point(width-20, height / 2 - 15));      for (int i = 0; i < timeline; i++)      {        int scale = i * xslice;        graphics.drawline(new pen(new solidbrush(color.blue)), 0 + scale, 0 + xsliceheight * 0.1f, 0 + scale, 0 - xsliceheight * 0.1f);      }      graphics.transform = new matrix(-1, 0, 0, -1, 0, 0);//y轴向上为正，x向右为      graphics.translatetransform(width, height / 2, matrixorder.append);      if (showx) drawx(graphics, points);      if (showy) drawy(graphics, points);      if (showz) drawz(graphics, points);      graphics.dispo();      return bitmap;    }    #region 绘制曲线    private void drawx(graphics graphics, list<float> points)  长江长度  {      pen curvepen = new pen(color.cyan, 2);美丽家庭      pointf[] curvepointf = new pointf[points.count];      float keys = 0;      float values = 0;      for (int i = 0; i < points.count; i++)      {        keys = xslice * i;        values = 10 * (points[i] / 10);        curvepointf[i] = new pointf(keys, values);      }      graphics.drawcurve(curvepen, curvepointf, this.tension);    }    private void drawy(graphics graphics, list<float> points)    {      pen cu刘长卿rvepen = new pen(color.purple, 2);      pointf[] curvepointf = new pointf[points.count];      float keys = 0;      float values = 0;  寿光一中    for (int i = 0; i < points.count; i++)      {        keys = xslice * i;        values = 10 * (points[i] / 10);        curvepointf[i] = new pointf(keys, values);      }      graphics.drawcurve(curvepen, curvepointf, this.tension);    }    private void drawz(graphics graphics, list<float> points)    {      pen curvepen = new pen(color.orangered, 2);      pointf[] curvepointf = new pointf[points.count];      float keys = 0;      float values = 0;      for (int i = 0; i < points.count; i++)      {        keys = xslice * i;        values = 10 * (points[i] / 10);        curvepointf[i] = new pointf(keys, values);      }     雍正之死 graphics.drawcurve(curvepen, curvepointf, this.tension);    }    /// <summary>    /// 曲线开关    /// </summary>    /// <param name="_xyz"></param>    /// <param name="show"></param>    public void hidecurve(string _xyz,bool show) {      switch (_xyz) {        ca "x":          showx = show;          break;        ca "y":          showy = show;          break;        ca "z":          showz = show;          break;        default:          break;      }    }    #endregion  }

3.ui上使用threadstart进行调用，根据需要设置休眠时间即可，同时设置picturebox显示即可。

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