用畫筆交互繪制任意封閉區(qū)域,并可選不同顏色填充運(yùn)用掃描線填充算法及運(yùn)用掃描線種子填充算法

1、Vc基本對(duì)話框創(chuàng)建界面用畫筆交互繪制任意封閉區(qū)域，并可選不同顏色填充。運(yùn)用掃描線填充算法及運(yùn)用掃描線種子填充算法。運(yùn)行結(jié)果： int temp=0;int x100,y100;int a=0;int xs,ys,xe,ye;int ymax,ymin;int k; /交點(diǎn)數(shù)int h;int xd7,yd7;int m;int m_cr,m_cg,m_cb;staticint r=0;staticintg=0;staticintb=0;void CYstcDlg:OnButton1() temp=1; void CYstcDlg:OnLButtonDown(UINT nFlags, CPoin

2、t point) if(temp=0)AfxMessageBox("請(qǐng)選定所要繪制的形狀！");xa=point.x; ya=point.y; a+;xs=point.x; ys=point.y;CDialog:OnLButtonDown(nFlags, point);void CYstcDlg:OnLButtonUp(UINT nFlags, CPoint point) CDC *pDC=GetDC(); xe=point.x;ye=point.y;if(temp=1) /交互畫圓 int x0=xs; int y0=ys; int r=(int)sqrt(long do

3、uble)(xs-xe)*(xs-xe)+(ys-ye)*(ys-ye); int f,b,d,x,y; d=1-r;x=0;y=r; /r為圓的半徑 while(y>=x) for(f=-m;f<=m;f+)for(b=-m;b<=m;b+)pDC->SetPixel (x0,y0,RGB(m_cr,m_cg,m_cb);pDC->SetPixel (x+x0+f,y+y0+b,RGB(m_cr,m_cg,m_cb); /(x0,y0)為圓心坐標(biāo)pDC->SetPixel (-x+x0+f,y+y0+b,RGB(m_cr,m_cg,m_cb);pDC-&g

4、t;SetPixel (-x+x0+f,-y+y0+b,RGB(m_cr,m_cg,m_cb);pDC->SetPixel (x+x0+f,-y+y0+b,RGB(m_cr,m_cg,m_cb);pDC->SetPixel (y+x0+f,x+y0+b,RGB(m_cr,m_cg,m_cb);pDC->SetPixel (-y+x0+f,x+y0+b,RGB(m_cr,m_cg,m_cb);pDC->SetPixel (-y+x0+f,-x+y0+b,RGB(m_cr,m_cg,m_cb);pDC->SetPixel (y+x0+f,-x+y0+b,RGB(m_c

5、r,m_cg,m_cb);x=x+1;if(d<0)d=d+2*x+3;elsed=d+2*(x-y)+5,y-; else if (temp=2) /交互畫多邊形int top=0; xa=x0; ya=y0; pDC->MoveTo (x0,y0);for (int i=1;i<=a-1;i+) pDC->LineTo(xi,yi);CDialog:OnLButtonUp(nFlags, point);void CYstcDlg:OnChangeEdit1() UpdateData(true);void CYstcDlg:OnChangeEdit2() Update

6、Data(true);void CYstcDlg:OnChangeEdit3() UpdateData(true);void CYstcDlg:OnButton2() temp=2;void CYstcDlg:OnButton3() CDC *pDC=GetDC(); CString strr;CString strg;CString strb;GetDlgItem(IDC_EDIT1)->GetWindowText(strr);GetDlgItem(IDC_EDIT2)->GetWindowText(strg);GetDlgItem(IDC_EDIT3)->GetWindo

7、wText(strb);r= _ttoi(strr);g=_ttoi(strg); b= _ttoi(strb);CClientDC dc(this); CPen *pOldpen;CPen pen;pen.CreatePen(PS_SOLID,5,RGB(r,g,b);temp=3;pOldpen=pDC->SelectObject(&pen);/if(temp=3) /掃描線填充/ /m_Fill=true;SelectObject(*pDC,pen); int i=0;ymin=y0;ymax=y0; /確定掃描線的范圍 for(i=1;i<6;i+) if(yi&l

8、t;ymin)ymin=yi;if(yi>ymax)ymax=yi;/ for(h=ymin;h<=ymax;h+) /掃描線填充 k=0;for(i=0;i<=5;i+)if(yi+1!=yi)if(h+0.5-yi)*(h+0.5-yi+1)<0)xdk=xi+(xi+1-xi)*(h-yi)/(yi+1-yi);ydk=h;k+;for(i=0;i<k-1;i+) /交點(diǎn)排序int t;m=i;for(int j=i+1;j<=k-1;j+)if(xdj<xdm)m=j;if(m!=i)t=xdi,xdi=xdm,xdm=t;for(i=0;i&

9、lt;=k-i;i=i+2)pDC->MoveTo(xdi,h);pDC->LineTo(xdi+1,h); DeleteObject(pen);void CYstcDlg:OnButton4() Invalidate();xs=0;ys=0;xe=0;ye=0;a=0;for(int i=0;i<a;i+)xi=0;yi=0;void CYstcDlg:OnButton5() CDialog:OnOK ();/聲明棧/int z3003;void push(int xs,int ys,long &top) top=top+1; ztop0=xs; ztop1=ys;

10、 void pop(int &xs,int &ys,long &top)xs=ztop0;ys=ztop1;top=top-1;void CYstcDlg:OnButton6() CDC*pDC=GetDC(); CString strr;CString strg;CString strb;GetDlgItem(IDC_EDIT1)->GetWindowText(strr);GetDlgItem(IDC_EDIT2)->GetWindowText(strg);GetDlgItem(IDC_EDIT3)->GetWindowText(strb);r= _

11、ttoi(strr);g=_ttoi(strg);b= _ttoi(strb);/*CClientDC dc(this); CPen *pOldpen;CPen pen;pen.CreatePen(PS_SOLID,5,RGB(r,g,b);temp=3;pOldpen=pDC->SelectObject(&pen);*/ int x0=xs; int y0=ys; long top=0; int flag,xn; push(xs,ys,top); while(top>0)pop(xs,ys,top);int x0=xs;int y0=ys;pDC->SetPixel

12、(x0,y0,RGB(r,g,b);while(pDC->GetPixel(x0+1,y0)!=RGB(0,0,0) && pDC->GetPixel(x0+1,y0)!=RGB(r,g,b)pDC->SetPixel(x0+1,y0,RGB(r,g,b);x0+;int xr=x0-1;x0=xs,y0=ys; /記錄右邊界，準(zhǔn)備向種子像素的左邊填充while(pDC->GetPixel(x0-1,y0)!=RGB(0,0,0) && pDC->GetPixel(x0-1,y0)!=RGB(r,g,b)pDC->SetPix

13、el(x0-1,y0,RGB(r,g,b);x0-;int xl=x0+1;x0=xl,y0=ys+1;while(x0<=xr)flag=0;while(pDC->GetPixel(x0,y0)!=RGB(0,0,0) && pDC->GetPixel(x0,y0)!=RGB(r,g,b) && x0<=xr )if(flag=0)flag=1;x0+;if(flag=1) /相鄰上一行有要填充的區(qū)域，新的種子像素坐標(biāo)入棧if(pDC->GetPixel(x0,y0)!=RGB(0,0,0) && x0=xr &a

14、mp;& pDC->GetPixel(x0,y0)!=RGB(r,g,b)push(x0,y0,top);elsepush(x0-1,y0,top);flag=0;int xn=x0;while(pDC->GetPixel(x0,y0)!=RGB(0,0,0) && pDC->GetPixel(x0,y0)!=RGB(r,g,b) && x0<=xr ) x0+;if(xn=x0)x0+;x0=xl;y0=ys-1; /準(zhǔn)備向相鄰下一行尋找新的種子像素坐標(biāo)入棧while(x0<=xr)flag=0;while(pDC->GetPixel(x0,y0)!=RGB(0,0,0) && pDC->GetPixel(x0,y0)!=RGB(r,g,b) && x0<=xr )if(flag=0)flag=1;x0+;if(flag=1)if(x0=xr && pDC->GetPixel(x0,y0)!=RGB(r,g