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
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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.Dispose(); 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.Dispose(); return bitmap; } #region 绘制曲线 private void DrawX(Graphics graphics, List<float> points) { Pen CurvePen = new Pen(Color.Cyan, 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); } graphics.DrawCurve(CurvePen, CurvePointF, this.tension); } private void DrawY(Graphics graphics, List<float> points) { Pen CurvePen = new Pen(Color.Purple, 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); } 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); } 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) { case "x": showX = show; break; case "y": showY = show; break; case "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。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/ikevin/article/details/49848645
