C 繪製實時曲線

1.要做乙個除錯工具，採集感測器資料並顯示。繪製曲線注意座標反轉，線條的張力即可。專案中的曲線是從右往左顯示的，線條的座標都放在list裡了，效果如下圖：

2.上**

public class drawingcurve

/// /// 繪製畫布
/// 
/// 
/// 
/// 
/// 
public bitmap drawcanvas(int width, int height,listpoints)
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軸向上為正，x向右為
pen pen = new pen(color.red, 1);
pen.dashstyle = dashstyle.custom;
pen.dashpattern = new float ;
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軸向上為正，x向右為
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++)
graphics.transform = new matrix(-1, 0, 0, -1, 0, 0);//y軸向上為正，x向右為
if (showx) drawx(graphics, points);
if (showy) drawy(graphics, points);
if (showz) drawz(graphics, points);
graphics.dispose();
return bitmap;
}#region 繪製曲線
private void drawx(graphics graphics, listpoints)
graphics.drawcurve(curvepen, curvepointf, this.tension);
}private void drawy(graphics graphics, listpoints)
graphics.drawcurve(curvepen, curvepointf, this.tension);
}private void drawz(graphics graphics, listpoints)
graphics.drawcurve(curvepen, curvepointf, this.tension);
}/// /// 曲線開關
/// 
/// 
/// 
public void hidecurve(string _xyz,bool show) 
}#endregion
}

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