Разработка программы на языке С++ для построения сложных геометрических фигур на плоскости

   {

         CDialog::OnSize(nType, cx, cy);

         this->RedrawWindow();

   }

   // функция OnSize вызывается при всяком изменении размера окна

   void CMyDlg::OnBtnUpdate()

   {

         if(k_filePath.GetLength() <= 0)return;

         if(!k_Draw.LoadParamFromFile(k_filePath.GetString()))

               this->MessageBox(_T("Can't load params"));

         this->RedrawWindow();

   } 

   Рисование

   #include "StdAfx.h"

   #include "Draw.h"

   #include <Math.h> 

   inline int sqrt(int arg){return (int)sqrt((double) (arg)); } 

   CDraw::CDraw(void):

         isCorrectState(false)

   {

   } 

   CDraw::~CDraw(void)

   {

   }

   bool CDraw::LoadParamFromFile(const TCHAR* path)

   {

         CStdioFile file;

         if(!file.Open(path, CStdioFile::modeRead | CStdioFile::typeText))return false; 

         CString strs[9];

         for(int i = 0; i < 9; i++)

         {

               if(!file.ReadString(strs[i]))

               {

                     file.Close();

                     return false;

               }

         }

         int i = 0;

         X1 = _tstoi(strs[i++].GetString());

         Y1 = _tstoi(strs[i++].GetString());

         R1 = _tstoi(strs[i++].GetString());

         x2 = _tstoi(strs[i++].GetString());

         y2 = _tstoi(strs[i++].GetString());

         r2 = _tstoi(strs[i++].GetString());

         x3 = _tstoi(strs[i++].GetString());

         y3 = _tstoi(strs[i++].GetString());

         r3 = _tstoi(strs[i++].GetString()); 

         //test 

         isCorrectState =

               (R1 > 0) &&

               (R1 > 2*r2) && (R1 > 2*r3) &&

               ((x2 - r2) > x3) &&

               sqrt((x2 - X1)*(x2 - X1) + (y2 - Y1)*(y2 - Y1)) + r2 < R1 &&

               sqrt((x3 - X1)*(x3 - X1) + (y3 - Y1)*(y3 - Y1)) + r3 < R1 ; 
 

         return isCorrectState;

   } 
 

   bool CDraw::Draw(CPaintDC* pDC)

   {

         if(!isCorrectState)return false; 

         RECT cr;

         pDC->GetWindow()->GetClientRect(&cr);

         int x0 = (cr.right - cr.left) /2;

         int y0 = (cr.bottom - cr.top) / 2; 

         pDC->Rectangle(&cr);  
 

         pDC->MoveTo(x0, cr.top);

         pDC->LineTo(x0, cr.bottom); 
 
 

         pDC->MoveTo(cr.left,y0);

         pDC->LineTo(cr.right,y0); 

         CRect r; 

         r.SetRect(X1 - R1, -(Y1 - R1), X1 + R1, -(Y1 + R1));

         r.OffsetRect(x0, y0);

         pDC->Arc(&r, CPoint(r.left, r.top), CPoint(r.left, r.top)); 

         pDC->MoveTo(x2 + x0, r.top + 10);

         pDC->LineTo(x2 + x0, r.bottom - 10); 

         pDC->MoveTo(x3 + x0, r.top + 10);

         pDC->LineTo(x3 + x0, r.bottom - 10); 

         r.SetRect(x2 - r2, -(y2 - r2), x2 + r2, -(y2 + r2));

         r.OffsetRect(x0, y0);

         pDC->Arc(&r, CPoint(r.left, r.top), CPoint(r.left, r.top)); 

         r.SetRect(x3 - r3, -(y3 - r3), x3 + r3, -(y3 + r3));

         r.OffsetRect(x0, y0);

         pDC->Arc(&r, CPoint(r.left, r.top), CPoint(r.left, r.top)); 

         CPen pen(PS_SOLID, 7, (COLORREF)(0));

         CPen* penLast = pDC->SelectObject(&pen); 
 

         pDC->MoveTo(X1 + x0, -Y1 + y0);

         pDC->LineTo(X1 + x0, -Y1 + y0); 

         pDC->MoveTo(x2 + x0, -y2 + y0);

         pDC->LineTo(x2 + x0, -y2 + y0); 

         pDC->MoveTo(x3 + x0, -y3 + y0);

         pDC->LineTo(x3 + x0, -y3 + y0); 

         r.SetRect(x2 - r2, -(y2 - r2), x2 + r2, -(y2 + r2));

         r.OffsetRect(x0, y0);

         pDC->Arc(&r, CPoint(r.CenterPoint().x, r.bottom), CPoint(r.CenterPoint().x, r.top)); 

         r.SetRect(x3 - r3, -(y3 - r3), x3 + r3, -(y3 + r3));

         r.OffsetRect(x0, y0);

         pDC->Arc(&r, CPoint(r.CenterPoint().x, r.bottom), CPoint(r.CenterPoint().x, r.top)); 
 

         //rb

         int lu = Y1 + sqrt(R1*R1 - (X1 - x3)*(X1 - x3));

         int ru = Y1 + sqrt(R1*R1 - (x2 - X1)*(x2 - X1));

         int rd = Y1 -(ru - Y1);

         int ld = Y1 -(lu - Y1); 
 

         pDC->MoveTo(x2 + x0, -(y2 - r2) + y0);

         pDC->LineTo(x2 + x0, -rd + y0); 

         pDC->MoveTo(x2 + x0, -(y2 + r2) + y0);

         pDC->LineTo(x2 + x0, -ru + y0); 

         pDC->MoveTo(x3 + x0, -(y3 - r3) + y0);

         pDC->LineTo(x3 + x0, -ld + y0); 

         pDC->MoveTo(x3 + x0, -(y3 + r3) + y0);

         pDC->LineTo(x3 + x0, -lu + y0); 
 

         r.SetRect(X1 - R1, -(Y1 - R1), X1 + R1, -(Y1 + R1));

         r.OffsetRect(x0, y0);

         pDC->Arc(&r, CPoint(x3 + x0, -ld + y0), CPoint(x2 + x0, -rd + y0));

         pDC->Arc(&r, CPoint(x2 + x0, -ru + y0), CPoint(x3 + x0, -lu + y0)); 
 

         pDC->SelectObject(penLast); 

         //CRect rto = cr;

         //rto.right -= 10;

         //rto.bottom -= 10; 

         //pDC->SetTextColor(0);

         //pDC->SetBkColor(RGB(255,255,255));

         //pDC->DrawText(_T("4ertenie 4ever!"),-1, &rto, DT_RIGHT | DT_BOTTOM | DT_SINGLELINE ); 

         return true;

   }