C#绘制等值线(源码)

1、下面是C#随机数格点值等值线绘制案例（包含源码），希望对大家有些帮助!1020306070显報点査看殆径源码：usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Text;usingSystem.WindowsForms;namespaceMyContourpublicpartialclassfrmMain:Form#region属性publicstaticboolshowPoint=false;public

2、staticbooldrawLines=true;privatefloat,_Data;/等值线原始格点数据/publicfloat,Datagetreturn_Data;set_Data=value;privatefloat_ContourValues;/等值线值数组/publicfloatContourValuesgetreturn_ContourValues;set_ContourValues=value;#endregion#region窗体所有操作publicfrmMain()InitializeComponent();MakeTestData();setColor();gg=pic

3、tureBox1.CreateGraphics();privatevoidbutton1_Click(objectsender,EventArgse)this.timer1.Enabled=false;initValue();/重新初始化绘制路径的数组MakeTestData();pictureBox1.Refresh();privatevoidpictureBox1_Paint(objectsender,PaintEventArgse)if(this.Data=null)return;StringFormatsf=newStringFormat();sf.Alignment=StringAl

4、ignment.Center;sf.LineAlignment=StringAlignment.Center;Penpen=newPen(Color.DarkGray,1);/绘制等值线if(drawLines)this.plotContour(e.Graphics,pictureBox1.Size);/绘制网格if(frmMain.showPoint)intww=pictureBoxl.Width/(Data.GetLength(O)-1);/x轴间隔长度intyy=pictureBox1.Height/(Data.GetLength(1)-1);/y轴间隔长度/绘制网格横竖线for(int

5、p=0;pData.GetLength(0);p+)e.Graphics.DrawLine(pen,newPoint(p*ww,0),newPoint(p)*ww,pictureBox1.Height);for(intk=0;kData.GetLength(1);k+)e.Graphics.DrawLine(pen,newPoint(0,k*yy),newPoint(pictureBox1.Width,k*yy);/绘制网格斜线for(intj=0;jData.GetLength(0)-1;j+)for(inti=1;iData.GetLength(1);i+)e.Graphics.DrawL

6、ine(pen,newPoint(j*ww,(i-1)*yy),newPoint(j+1)*ww,i*yy);e.Graphics.DrawLine(pen,newPoint(j*ww,i*yy),newPoint(j+1)*ww,(i-1)*yy);/绘制格点值for(intj=0;jData.GetLength(1);j+)for(inti=0;iData.GetLength(0);i+)e.Graphics.DrawString(Datai,j.ToString(f0),DefaultFont,Brushes.Blue,i*pictureBox1.Width/(Data.GetLengt

7、h(0)-1),j*pictureBox1.Height/(Data.GetLength(1)-1),sf);privatevoidpictureBox1_SizeChanged(objectsender,EventArgse)pictureBox1.Refresh();privatevoidsetColor()label1.BackColor=getSpectrumColor(0f);label2.BackColor=getSpectrumColor(1f);label3.BackColor=getSpectrumColor(2f);label4.BackColor=getSpectrumC

8、olor(3f);label5.BackColor=getSpectrumColor(4f);label6.BackColor=getSpectrumColor(5f);label7.BackColor=getSpectrumColor(6f);label8.BackColor=getSpectrumColor(7f);privatevoidcheckBox1_CheckedChanged(objectsender,EventArgse)frmMain.showPoint=checkBox1.Checked;pictureBox1.Refresh();/生成路径按钮privatevoidbut

9、ton2_Click(objectsender,EventArgse)drawLines=false;this.pictureBox1.Refresh();nums=0;if(drawValuesnums.color!=null)pens.Color=drawValuesnums.color;gg.DrawLine(pens,drawValuesnums.x1,drawValuesnums.y1,drawValuesnums.x2,drawValuesnums.y2);nums+;elsethis.timer1.Enabled=false;nums=0;timer1.Enabled=true;

10、drawLines=true;Graphicsgg=null;/绘制路径的对象Penpens=newPen(Color.Black,1);privatevoidtimer1_Tick(objectsender,EventArgse)if(drawValuesnums.color!=Color.FromArgb(0,0,0)pens.Color=drawValuesnums.color;gg.DrawLine(pens,drawValuesnums.x1,drawValuesnums.y1,drawValuesnums.x2,drawValuesnums.y2);nums+;elsethis.t

11、imer1.Enabled=false;nums=0;#endregion#region绘制等值线操作/生成测试数据/publicvoidMakeTestData()constintnx=10,ny=10,nv=7;ContourValues=newfloatnv;for(inti=0;inv;i+)_ContourValuesi=i*10;_Data=newfloatnx,ny;/nx列，ny行Randomran=newRandom();for(intj=0;jny;j+)for(inti=0;inx;i+)_Datai,j=ran.Next(0,70);/如果格点值等于等值线值,格点值加一

12、个小值for(intk=0;knv;k+)if(_Datai,j=ContourValuesk)_Datai,j+=0.0001f;intv1,v2,v3,small,medium,large;intix=newint4,iy=newint4;floatx1,x2,y1,y2,target;floatX=newfloat5,Y=newfloat5,value=newfloat5;intiX(floatx,intwidth)return(int)Math.Round(width/(Data.GetLength(0)-1)*x);intiY(floaty,intheight)return(int)

13、Math.Round(height/(Data.GetLength(1)-1)*y);/根据等值线值取得相应级别颜色/publicColorgetSpectrumColor(floatvalue)Colorc=Color.Black;floatc0=0.0F,c1=256.0F,c2=256.0F*2.0F,c3=256.0F*3.0F,c4=256.0F*4.0F,c5=256.0F*5.0F;floatStep=c5*(value)/ContourValues.Length;if(Stepc4&Stepc3&Stepc2&Stepc1&Step=c0&Step=c1)floata=Step

14、;c=Color.FromArgb(int)(255.0F-255.0F*a/c1),0,255);elsec=Color.Black;returnc;/插值计算/floatinterp(floatxa,floatya,floatxb,floatyb,floatyy)if(yb-ya)!=0.0F)returnxa+(yy-ya)*(xb-xa)/(yb-ya);elsereturn0.0F;Fontfont=newFont(TimesNewRoman,8.0f);Brushbrush=newSolidBrush(Color.Blue);/等值线分析及绘图publicvoidplotConto

15、ur(Graphicsg,Sizesize)nums=0;Penpen=newPen(Color.Black,1);for(intj=0;jData.GetLength(1)-1;j+)for(inti=0;iData.GetLength(0)-1;i+)/网格四个角坐标,变量值X0=i;Y0=j;value0=Datai,j;X1=i+1;Y1=j;value1=Datai+1,j;X2=i+1;Y2=j+1;value2=Datai+1,j+1;X3=i;Y3=j+1;value3=Datai,j+1;/网格中心点坐标,变量值X4=0.5F*(X0+X1);Y4=0.5F*(Y1+Y2);

16、value4=0.25F*(value0+value1+value2+value3);v3=4;/巡检单元格范围内所有的点信息for(v1=0;v14;v1+)v2=v1+1;if(v1=3)v2=0;reorder(v1,v2,v3);/巡检点范围内所有的点信息for(intlines=0;linesContourValues.Length;lines+)target=ContourValueslines;if(valuesmalltarget&targetvaluemedium)x2=interp(Xmedium,valuemedium,Xlarge,valuelarge,target);

17、y2=interp(Ymedium,valuemedium,Ylarge,valuelarge,target);elsex2=interp(Xsmall,valuesmall,Xmedium,valuemedium,target);y2=interp(Ysmall,valuesmall,Ymedium,valuemedium,target);pen.Color=getSpectrumColor(target/10);g.DrawLine(pen,iX(x1,size.Width),iY(y1,size.Height),iX(x2,size.Width),iY(y2,size.Height);/

18、g.DrawString(target.ToString(),font,brush,newPointF(iX(x1,size.Width)+iX(x2,size.Width)/2,(iY(y1,size.Height)+iY(y2,size.Height)/2);drawValuesnums.color=getSpectrumColor(target/10);drawValuesnums.x1=iX(x1,size.Width);drawValuesnums.y1=iY(y1,size.Height);drawValuesnums.x2=iX(x2,size.Width);drawValuesnums.y2=iY(y2,size.Height);nums+;intnums=0;structDrawValuespublicColorcolor;publicintx1;publicinty1;publicintx2;publicinty2;DrawValuesdrawValues=newDrawValues90000;/存储绘制点的信息/根据i,j,k三点值，算出大中小三点/voidreorder(inti,intj,intk)