diamondview.cpp

旋转的金刚钻

// DiamondView.cpp : implementation of the CDiamondView class
//

#include "stdafx.h"
#include "Diamond.h"

#include "DiamondDoc.h"
#include "DiamondView.h"
#include "math.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CDiamondView

IMPLEMENT_DYNCREATE(CDiamondView, CView)

BEGIN_MESSAGE_MAP(CDiamondView, CView)
	//{{AFX_MSG_MAP(CDiamondView)
	ON_WM_CREATE()
	ON_WM_DESTROY()
	ON_WM_TIMER()
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CDiamondView construction/destruction

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

}

CDiamondView::~CDiamondView()
{
}

BOOL CDiamondView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CDiamondView drawing

void CDiamondView::OnDraw(CDC* pDC)
{
	CDiamondDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
//	RotatePoints();
	CPen pen,*pOldPen;
	pen.CreatePen(PS_SOLID,1,RGB(0,0,255));
	pOldPen=pDC->SelectObject(&pen);
	CRect rect;
	this->GetClientRect(rect);
	int CenterX=rect.Width()/2;
	int CenterY=rect.Height()/2;
	int radius=min(CenterX,CenterY);
	int i,j;
	for(i=0;i<MaxPoints;i++)
	{
		for(j=i+1;j<MaxPoints;j++)
		{
			int x=radius+Points[i].x*radius;
			int y=radius+Points[i].y*radius;
			pDC->MoveTo(x,y);
			int m=radius+Points[j].x*radius;
			int n=radius+Points[j].y*radius;
			pDC->LineTo(m,n);
		}
	}
	pDC->SelectObject(pOldPen);
}

/////////////////////////////////////////////////////////////////////////////
// CDiamondView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CDiamondView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CDiamondView message handlers

void CDiamondView::RotatePoints()
{
	const double StepAngle=2*PI/MaxPoints;//角点之间的圆心角
	rotation+=PI/32;//设定每次旋转的角度
	if(rotation>StepAngle)
		rotation-=StepAngle;//保持每次旋转角度小于两点之间的圆心角
	int i;//i表示角度的次序
	double j;//j表示旋转后每个角点的角度
	for(i=0,j=rotation;i<MaxPoints;i++,j+=StepAngle)
	{
		Points[i].x=cos(j);
		Points[i].y=sin(j);
	}

}


int CDiamondView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CView::OnCreate(lpCreateStruct) == -1)
		return -1;
	SetTimer(1,50,NULL);
	CDC *pDC=GetDC();
	CPen pen;
	pen.CreatePen(PS_SOLID,3,RGB(0,255,255));
	pDC->SelectObject(&pen);
	rotation=0;

	// TODO: Add your specialized creation code here
	
	return 0;
}

void CDiamondView::OnDestroy() 
{
	KillTimer(1);
	CView::OnDestroy();
	
	// TODO: Add your message handler code here

	
}

void CDiamondView::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	RotatePoints();
	Invalidate();
	CView::OnTimer(nIDEvent);
}