fenxingview.cpp

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// fenxingView.cpp : implementation of the CFenxingView class
//

#include "stdafx.h"
#include "fenxing.h"

#include "fenxingDoc.h"
#include "fenxingView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CFenxingView

IMPLEMENT_DYNCREATE(CFenxingView, CView)

BEGIN_MESSAGE_MAP(CFenxingView, CView)
	//{{AFX_MSG_MAP(CFenxingView)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFenxingView construction/destruction

CFenxingView::CFenxingView()
{
	// TODO: add construction code here

}

CFenxingView::~CFenxingView()
{
}

BOOL CFenxingView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs
	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CFenxingView drawing

void CFenxingView::Couch(CDC* pDC,int x1,int y1,int x2,int y2,int n)
{
 //pDC是画图的设备上下文的指针
 //x1,y1,x2,y2是起始的两点
 //其中参数n是递归的层数
 int x3,y3,x4,y4,x5,y5;
 //以下是根据空间几何计算出来的坐标
 x3=x1+(x2-x1)/3;
 y3=y1+(y2-y1)/3;
 x4=x1+(x2-x1)*2/3;
 y4=y1+(y2-y1)*2/3;
 x5=x3+(x4-x3)/2+int(sqrt(3)*(y4-y3)/2);
 y5=y3-int(sqrt(3)*(x4-x3)/2)+(y4-y3)/2;
 //递归最后一层,递归的出口
 if(n==1)
 {
  pDC->MoveTo(x1,y1);
  pDC->LineTo(x3,y3);
  pDC->LineTo(x5,y5);
  pDC->LineTo(x4,y4);
  pDC->LineTo(x2,y2);
 }
 else
 {
  //递归画图
  Couch(pDC,x1,y1,x3,y3,n-1);
  Couch(pDC,x3,y3,x5,y5,n-1);
  Couch(pDC,x5,y5,x4,y4,n-1);
  Couch(pDC,x4,y4,x2,y2,n-1);
 }
}

void CFenxingView::Tree(CDC *pDC,int x1,int y1,int x2,int y2,int n)
{
 //pDC是画图的设备上下文的指针
 //x1,y1,x2,y2是起始矩形坐标
 //其中参数n是递归的层数
 int x3,y3,x4,y4,x5,y5;
 //以下是根据空间几何计算出来的坐标
 x3=x1+(x2-x1)/3;
 y3=y1+(y2-y1)/3;
 x4=x3+int((x1-x3)*cos(5*pi/6))-int((y1-y3)*sin(5*pi/6));
 y4=y3+int((x1-x3)*sin(5*pi/6))+int((y1-y3)*cos(5*pi/6));
 x5=x3+int((x1-x3)*cos(5*pi/6))+int((y1-y3)*sin(5*pi/6));
 y5=y3-int((x1-x3)*sin(5*pi/6))+int((y1-y3)*cos(5*pi/6));

 pDC->MoveTo(x1,y1);
 pDC->LineTo(x2,y2);
 //递归最后一层,递归的出口
 if(n==1)
 {
  pDC->MoveTo(x3,y3);
  pDC->LineTo(x4,y4);
  pDC->MoveTo(x3,y3);
  pDC->LineTo(x5,y5);
 }
 else
 {
  //递归画图
  Tree(pDC,x3,y3,x2,y2,n-1);
  Tree(pDC,x3,y3,x4,y4,n-1);
  Tree(pDC,x3,y3,x5,y5,n-1);
 }
}


void CFenxingView::OnDraw(CDC* pDC)
{
	CFenxingDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
   // Couch(pDC,100,300,500,300,4);
	Tree(pDC,100,400,100,100,5);
}


/////////////////////////////////////////////////////////////////////////////
// CFenxingView printing

BOOL CFenxingView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CFenxingView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CFenxingView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CFenxingView diagnostics

#ifdef _DEBUG
void CFenxingView::AssertValid() const
{
	CView::AssertValid();
}

void CFenxingView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CFenxingDoc* CFenxingView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CFenxingDoc)));
	return (CFenxingDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////