图形裁剪代码.doc

CPoint ptsetN,ptN, ptsN, ptseN,pN,ptset1N;#define LEFT 1#define RIGHT 2#define BOTTOM 4#define TOP 8#define XL 100#define XR 300#define YT 100#define YB 250CPen newpen(PS_SOLID,1,RGB(255,0,0);CPen *old=pDC-SelectObject(&newpen);pDC-Rectangle(CRect(XL,YT,XR,YB);/ptset0=CPoint(120,150);ptset1=CPoint(170,110); ptset2=CPoint(0,190);ptset3=CPoint(350,150);ptset4=CPoint(0,250);ptset5=CPoint(150,230);ptset6=CPoint(200,50);ptset7=CPoint(120,150);ptset10=CPoint(20,150);ptset11=CPoint(170,110); ptset12=CPoint(250,150);ptset13=CPoint(200,230);ptset14=CPoint(20,150);pDC-TextOut(0,20,);pDC-TextOut(0,50,);pDC-SelectObject(old);CDC* pDC=GetDC();CPen newpen(PS_SOLID,1,RGB(255,0,0);CPen *old=pDC-SelectObject(&newpen);for(int i=0;iMoveTo(ptseti);pDC-LineTo(ptseti+1);i+;CView:OnLButtonDblClk(nFlags, point);CDC* pDC=GetDC();CPen newpen(PS_SOLID,1,RGB(0,255,0);CPen *old=pDC-SelectObject(&newpen);float x,y;int i;int code1,code2;RedrawWindow();/ codefor(i=0;iN;i+,i+)int c=0;if(ptseti.xXR)c=c|RIGHT;if(ptseti.yYB) c=c|BOTTOM;else if(ptseti.yYT) c=c|TOP;code1=c; c=0;if(ptseti+1.xXR) c=c|RIGHT;if(ptseti+1.yYB) c=c|BOTTOM;else if(ptseti+1.yMoveTo(ptseti.x,ptseti.y);pDC-LineTo(ptseti+1.x,ptseti+1.y);if(code1=0&code2=0)pDC-MoveTo(ptseti.x,ptseti.y);pDC-LineTo(ptseti+1.x,ptseti+1.y);if(code1=0&code2!=0)pDC-MoveTo(ptset0.x,ptset0.y);if(LEFT&code2)!=0) /x=XL;y=(float)ptseti.y+(ptseti+1.y-ptseti.y)*(XL-ptseti.x)/(ptseti+1.x-ptseti.x);else if(RIGHT&code2)!=0) /x=XR;y=(float)ptseti.y+(ptseti+1.y-ptseti.y)*(XR-ptseti.x)/(ptseti+1.x-ptseti.x);else if(BOTTOM&code2)!=0) /y=YB;x=(float)ptseti.x+(ptseti+1.x-ptseti.x)*(YB-ptseti.y)/(ptseti+1.y-ptseti+1.y);else if(TOP&code2)!=0) /y=YT;x=(float)ptseti.x+(ptseti+1.x-ptseti.x)*(YT-ptseti.y)/(ptseti+1.y-ptseti.y);ptseti+1.x=(long)x;ptseti+1.y=(long)y;pDC-LineTo(ptseti+1.x,ptseti+1.y);if(code1!=0&code2=0)pDC-MoveTo(ptseti+1.x,ptseti+1.y);if(LEFT&code1)!=0) /x=XL;y=(float)ptseti.y+(ptseti+1.y-ptseti.y)*(XL-ptseti.x)/(ptseti+1.x-ptseti.x);else if(RIGHT&code1)!=0) /x=XR;y=(float)ptseti.y+(ptseti+1.y-ptseti.y)*(XR-ptseti.x)/(ptseti+1.x-ptseti.x);else if(BOTTOM&code1)!=0) /y=YB;x=(float)ptseti.x+(ptseti+1.x-ptseti.x)*(YB-ptseti.y)/(ptseti+1.y-ptseti+1.y);else if(TOP&code1)!=0) /y=YT;x=(float)ptseti.x+(ptseti+1.x-ptseti.x)*(YT-ptseti.y)/(ptseti+1.y-ptseti.y);ptseti.x=(long)x;ptseti.y=(long)y;pDC-LineTo(ptseti.x,ptseti.y);CDC* pDC=GetDC();CPen newpen(PS_SOLID,1,RGB(255,0,0);CPen *old=pDC-SelectObject(&newpen);for(int i=0;iMoveTo(ptseti);pDC-LineTo(ptseti+1);i+;CView:OnLButtonDblClk(nFlags, point);void CMyView:OnClippolygon() / TODO: Add your command handler code hereCDC* pDC=GetDC();CPen newpen(PS_SOLID,1,RGB(0,255,0);CPen *old=pDC-SelectObject(&newpen);int i,k;int code1,code2;intM=5;RedrawWindow();/ codek=0;for(i=0;iM;i+)int c=0;if(ptset1i.xXL)c=0;code1=c; c=0;if(ptset1i+1.xXL) c=0;code2=c;if(code1!=0&code2=0)ptk.x=XL;ptk.y=ptset1i.y+(ptset1i+1.y-ptset1i.y)*(XL-ptset1i.x)/(ptset1i+1.x-ptset1i.x);ptk+1.x=ptset1i+1.x;ptk+1.y=ptset1i+1.y;k=k+2;if(code1=0&code2=0)if(k=0)ptk.x=ptset1i.x;ptk.y=ptset1i.y;ptk+1.x=ptset1i+1.x;ptk+1.y=ptset1i+1.y;k=k+2;if(k!=0)ptk.x=ptset1i+1.x;ptk.y=ptset1i+1.y;k=k+1;if(code1=0&code2!=0)ptk.x=XL;ptk.y=ptset1i.y+(ptset1i+1.y-ptset1i.y)*(XL-ptset1i.x)/(ptset1i+1.x-ptset1i.x);k+;ptk.x=pt0.x;ptk.y=pt0.y;M=k+1;k=0;for(i=0;iM;i+)int c=0;if(pti.xXR) c=2;code1=c; c=0;if(pti+1.xXR) c=2;code2=c;if(code1=0&code2=0)if(k=0)ptsk.x=pti.x;ptsk.y=pti.y;ptsk+1.x=pti+1.x;ptsk+1.y=pti+1.y;k=k+2;if(k!=0)ptsk.x=pti+1.x;ptsk.y=pti+1.y;k+;if(code1!=0&code2=0)ptsk.x=XR;ptsk.y=pti.y+(pti+1.y-pti.y)*(XR-pti.x)/(pti+1.x-pti.x);ptsk+1.x=pti+1.x;ptsk+1.y=pti+1.y;k=k+2;if(code1=0&code2!=0)ptsk.x=XR;ptsk.y=pti.y+(pti+1.y-pti.y)*(XR-pti.x)/(pti+1.x-pti.x);k=k+1;/ptsk=pts0;M=k+1;k=0;for(i=0;iYB) c=4;else if(ptsi.yYB) c=4;else if(ptsi+1.yYB) c=0;code2=c;if(code1=0&code2=0)if(k=0)ptsek.x=ptsi.x;ptsek.y=ptsi.y;ptsek+1.x=ptsi+1.x;ptsek+1.y=ptsi+1.y;k=k+2;if(k!=0)ptsek.x=ptsi+1.x;ptsek.y=ptsi+1.y;k=k+1;if(code1!=0&code2=0)ptsek.y=YB;ptsek.x=ptsi.x+(ptsi+1.x-ptsi.x)*(YB-ptsi.y)/(ptsi+1.y-ptsi+1.y);ptsek+1.x=ptsi+1.x;ptsek+1.y=ptsi+1.y;k=k+2;if(code1=0&code2!=0)ptsek.y=YB;ptsek.x=ptsi.x+(ptsi+1.x-ptsi.x)*(YB-ptsi.y)/(ptsi+1.y-ptsi+1.y);k=k+1;ptsek=ptse0;M=k+1;k=0;for(i=0;iYT) c=0;else if(ptsei.yYT) c=0;else if(ptsei+1.yMoveTo(p0);for(int j=1;jLineTo(pj);void CMyView:OnRButtonDblClk(UINT nFlags, CPoint point) / TODO: