vc++编程绘图

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[p=155, null, left]2

[p=182, null, left][size=169px]CRect r;GetClientRect(r);

[p=182, null, left][size=169px]pDC->SetMapMode(7);

[p=182, null, left][size=169px]pDC->SetWindowOrg(0,0);

[p=182, null, left][size=169px]pDC->SetViewportOrg(r.right/4,r.bottom/2);

[p=182, null, left][size=169px]pDC->SetWindowExt(200,100);

[p=182, null, left][size=169px]pDC->SetViewportExt(200,-100);

[p=182, null, left][size=169px]for(int i=1;i<=15;i++)

[p=182, null, left][size=169px]{

[p=182, null, left][size=169px]CPen pi(0,2,RGB(255-10*i,10*i,20*i));

[p=182, null, left][size=169px]pDC->SelectObject(pi);

[p=182, null, left][size=169px]pDC->MoveTo(300,100);

[p=182, null, left][size=169px]pDC->Arc(300-10*i,100,300+10*i,100-20*i,300,100,300,100);}}

[p=207, null, left]2-2

[p=207, null, left][size=193px]运行结果：

[p=207, null, left]2-3

[p=207, null, left][size=193px]源程序：

[p=207, null, left]#include"math.h"

[p=207, null, left]void CMy24View::OnDraw(CDC* pDC)

[p=207, null, left]{CRect r;GetClientRect(r);

[p=207, null, left]pDC->SetMapMode(7);

[p=207, null, left]pDC->SetWindowOrg(0,0);

[p=207, null, left]pDC->SetViewportOrg(r.right/2,r.bottom/2);

[p=207, null, left]pDC->SetWindowExt(100,100);

[p=207, null, left]pDC->SetViewportExt(100,-100);

[p=207, null, left]CPen p1(0,2,RGB(0,0,0));

[p=207, null, left]double p3[5][2],p2[5][2];double a=3.1415926;

wap.njtsv.com

[p=155, null, left]3

[p=207, null, left]for(int i=0;i<=4;i++)

[p=207, null, left]{p3[0]=100*cos((90+72*i)*a/180);

[p=207, null, left]p3[1]=100*sin((90+72*i)*a/180);

[p=207, null, left]p2[0]=38.2*cos((126+72*i)*a/180);

[p=207, null, left]p2[1]=38.2*sin((126+72*i)*a/180);}

[p=207, null, left]pDC->MoveTo(0,0);

[p=207, null, left]pDC->SelectObject(p1);

[p=207, null, left]for( i=0;i<=4;i++)

[p=207, null, left]{ pDC->MoveTo(0,0);

[p=207, null, left]pDC->LineTo(p3[0],p3[1]);

[p=207, null, left]pDC->LineTo(p2[0],p2[1]);

[p=207, null, left]pDC->MoveTo(0,0);

[p=207, null, left]pDC->LineTo(p2[0],p2[1]);  

[p=207, null, left]pDC->LineTo(p3[i+1][0],p3[i+1][1]);

[p=207, null, left]pDC->MoveTo(p2[4][0],p2[4][1]);

[p=207, null, left]pDC->LineTo(p3[0][0],p3[0][1]);}}

[p=207, null, left]2-3

[p=207, null, left]运行结果：

[p=207, null, left][size=193px]2-4

[p=207, null, left][size=193px]源程序：

[p=207, null, left]void CMy2_4View::OnDraw(CDC* pDC)

[p=207, null, left]{CMy2_4Doc* pDoc = GetDocument();

[p=207, null, left]ASSERT_V

[p=207, null, left]ALID(pDoc);

[p=207, null, left]CRect r;GetClientRect(r);

[p=207, null, left]pDC->SetMapMode(7);

[p=207, null, left]pDC->SetWindowOrg(0,0);

[p=207, null, left]pDC->SetViewportOrg(r.right/2,r.bottom*3/4);

[p=207, null, left]pDC->SetWindowExt(200,100);

[p=207, null, left]pDC->SetViewportExt(400,-200);