www.pudn.com > fbh_bezier.rar > bezierView.cpp

// bezierView.cpp : implementation of the CBezierView class 
// 
 
#include "stdafx.h" 
#include "bezier.h" 
 
#include "bezierDoc.h" 
#include "bezierView.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CBezierView 
 
IMPLEMENT_DYNCREATE(CBezierView, CView) 
 
BEGIN_MESSAGE_MAP(CBezierView, CView) 
	//{{AFX_MSG_MAP(CBezierView) 
		// NOTE - the ClassWizard will add and remove mapping macros here. 
		//    DO NOT EDIT what you see in these blocks of generated code! 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CBezierView construction/destruction 
 
CBezierView::CBezierView() 
{ 
	// TODO: add construction code here 
 
} 
 
CBezierView::~CBezierView() 
{ 
} 
 
BOOL CBezierView::PreCreateWindow(CREATESTRUCT& cs) 
{ 
	// TODO: Modify the Window class or styles here by modifying 
	//  the CREATESTRUCT cs 
 
	return CView::PreCreateWindow(cs); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CBezierView drawing 
 
void CBezierView::OnDraw(CDC* pDC) 
{ 
	CBezierDoc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
	// TODO: add draw code for native data here 
 
	CPoint controlPt[7]; 
	 
	controlPt[0].x = 0;   controlPt[0].y = 0; 
	controlPt[1].x = 100; controlPt[1].y = 100; 
	controlPt[2].x = 200; controlPt[2].y = 300; 
	controlPt[3].x = 300; controlPt[3].y = 500; 
	controlPt[4].x = 400; controlPt[4].y = 300; 
    controlPt[5].x = 500; controlPt[5].y = 200; 
	controlPt[6].x = 600; controlPt[6].y = 0; 
	 
	Decst(controlPt, 7); 
	Draw(controlPt, 7); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CBezierView diagnostics 
 
#ifdef _DEBUG 
void CBezierView::AssertValid() const 
{ 
	CView::AssertValid(); 
} 
 
void CBezierView::Dump(CDumpContext& dc) const 
{ 
	CView::Dump(dc); 
} 
 
CBezierDoc* CBezierView::GetDocument() // non-debug version is inline 
{ 
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CBezierDoc))); 
	return (CBezierDoc*)m_pDocument; 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// CBezierView message handlers 
void CBezierView::Draw(CPoint point[], int n) 
{ 
	CDC   *pDC = GetDC(); 
	 
    /*::GetClientRect(pWnd->m_hWnd, m_rect);*/ 
	pDC->SelectStockObject(NULL_BRUSH); 
 
    pDC->Polyline(point, n); 
     
	ReleaseDC(pDC); 
	 
} 
 
void CBezierView::Decst(CPoint point[], int n) 
{    
	 
    CPoint curvePoint[101]; 
	 
	// 控制顶点的两个端点作为BEZIER曲线的端点 
    curvePoint[0].x = point[0].x; 
	curvePoint[0].y = point[0].y; 
	curvePoint[100].x = point[n-1].x; 
	curvePoint[100].y = point[n-1].y; 
	 
	// 动态生成一个和控制顶点个数一样大的点数组,用于后面的操作 
	CPoint *tempPt = new CPoint[n]; 
	 
	int temp = 1; 
	// 不同比例求得不同的BEZIER曲线上的点 
	for(int radio=1; radio<100; radio++) 
	{ 
		 
		int m = n; 
		 
		// 将控制顶点元素全部赋值给动态生成的点数组 
		for(int k=0; k