animateview.cpp

在mfc中简单运动的正方形,其原理可为有些初学者作出一点贡献

// AnimateView.cpp : implementation of the CAnimateView class
//

#include "stdafx.h"
#include "Animate.h"

#include "AnimateDoc.h"
#include "AnimateView.h"

//add down
#include "gl\gl.h"
#include "gl\glu.h"
#include "gl\glaux.h"
//add up




//add down


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

/////////////////////////////////////////////////////////////////////////////
// CAnimateView

IMPLEMENT_DYNCREATE(CAnimateView, CView)

BEGIN_MESSAGE_MAP(CAnimateView, CView)
	//{{AFX_MSG_MAP(CAnimateView)
	ON_WM_CREATE()
	ON_WM_DESTROY()
	ON_WM_ERASEBKGND()
	ON_WM_SIZE()
	ON_COMMAND(ID_FILE_PLAY, OnFilePlay)
	ON_UPDATE_COMMAND_UI(ID_FILE_PLAY, OnUpdateFilePlay)
	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()

/////////////////////////////////////////////////////////////////////////////
// CAnimateView construction/destruction

CAnimateView::CAnimateView()
{
	//add down
	m_pDC = NULL;
	m_play = FALSE;
	//add up
}

CAnimateView::~CAnimateView()
{
}

BOOL CAnimateView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs
	//add down
	cs.style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
	//add up

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CAnimateView drawing

void CAnimateView::OnDraw(CDC* pDC)
{
	CAnimateDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	//add down
	DrawScene();
	//add up
}

/////////////////////////////////////////////////////////////////////////////
// CAnimateView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CAnimateView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CAnimateView message handlers

int CAnimateView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CView::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	//add down
	Init(); //初始化OpenGL
	//add up
	
	return 0;
}

void CAnimateView::OnDestroy() 
{
	//add down
	HGLRC   hrc;

	//撤消时间步
	KillTimer(1);

	hrc = ::wglGetCurrentContext();

	::wglMakeCurrent(NULL,  NULL);

	if (hrc)
		::wglDeleteContext(hrc);

	if (m_pDC)
		delete m_pDC;
	//add up

	CView::OnDestroy();
}

BOOL CAnimateView::OnEraseBkgnd(CDC* pDC) 
{
	return TRUE;
}

void CAnimateView::OnSize(UINT nType, int cx, int cy) 
{
	CView::OnSize(nType, cx, cy);
	
	//add down
	int w=cx;
	int h=cy;
	//避免除数为0
	if(h==0) h=1;

	//设置视口与窗口匹配
    glViewport(0, 0, (GLsizei) w, (GLsizei) h);
	//重新设置坐标系统
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
	//建立正交变换下的剪切体
	if (cx <= cy)
		glOrtho (-3.5, 3.5, -3.5*(GLfloat)cy/(GLfloat)cx, 
		       3.5*(GLfloat)cy/(GLfloat)cx ,-3.5, 3.5);
	else
		glOrtho (-3.5*(GLfloat)cx/(GLfloat)cy, 
			   3.5*(GLfloat)cx/(GLfloat)cy, -3.5, 3.5, -3.5, 3.5);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
	//add up
}

//add down
void CAnimateView::Init()
{
	PIXELFORMATDESCRIPTOR pfd;
	int         n;
	HGLRC       hrc;

	m_pDC = new CClientDC(this);

	ASSERT(m_pDC != NULL);

	if (!bSetupPixelFormat())
		return;

	n = ::GetPixelFormat(m_pDC->GetSafeHdc());
	::DescribePixelFormat(m_pDC->GetSafeHdc(), n, sizeof(pfd), &pfd);

	hrc = wglCreateContext(m_pDC->GetSafeHdc());
	wglMakeCurrent(m_pDC->GetSafeHdc(), hrc);

	
    glEnable(GL_LIGHTING);    
}

BOOL CAnimateView::bSetupPixelFormat()
{
	static PIXELFORMATDESCRIPTOR pfd =
	{
		sizeof(PIXELFORMATDESCRIPTOR),  // size of this pfd
		1,                              // version number
		PFD_DRAW_TO_WINDOW |            // support window
		  PFD_SUPPORT_OPENGL |          // support OpenGL
		  PFD_DOUBLEBUFFER,             // double buffered
		PFD_TYPE_RGBA,                  // RGBA type
		24,                             // 24-bit color depth
		0, 0, 0, 0, 0, 0,               // color bits ignored
		0,                              // no alpha buffer
		0,                              // shift bit ignored
		0,                              // no accumulation buffer
		0, 0, 0, 0,                     // accum bits ignored
		32,                             // 32-bit z-buffer
		0,                              // no stencil buffer
		0,                              // no auxiliary buffer
		PFD_MAIN_PLANE,                 // main layer
		0,                              // reserved
		0, 0, 0                         // layer masks ignored
	};
	int pixelformat;

	if ( (pixelformat = ChoosePixelFormat(m_pDC->GetSafeHdc(), &pfd)) == 0 )
	{
		MessageBox("ChoosePixelFormat failed");
		return FALSE;
	}

	if (SetPixelFormat(m_pDC->GetSafeHdc(), pixelformat, &pfd) == FALSE)
	{
		MessageBox("SetPixelFormat failed");
		return FALSE;
	}

	return TRUE;
}

void CAnimateView::DrawScene(void)
{
	static BOOL     bBusy = FALSE;
	static GLfloat  wAngleY = 10.0f;
	static GLfloat  wAngleX = 1.0f;
	static GLfloat  wAngleZ = 5.0f;

	if(bBusy)
		return;
	bBusy = TRUE;

	//将初始的背景色设置为黑色
	glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
	//清除颜色缓存和深度缓存
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

   glPushMatrix ();

		glRotatef(wAngleX, 1.0f, 0.0f, 0.0f);
		glRotatef(wAngleY, 0.0f, 1.0f, 0.0f);
		glRotatef(wAngleZ, 0.0f, 0.0f, 1.0f);

		wAngleX += 1.0f;
		wAngleY += 10.0f;
		wAngleZ += 5.0f;

	    
	    auxWireCube(2.0);
	    glPopMatrix ();

	glFinish();
	SwapBuffers(wglGetCurrentDC());

	bBusy = FALSE;
}



void CAnimateView::OnFilePlay() 
{
	//m_play：是否播放动画
	m_play = m_play ? FALSE : TRUE;
	if (m_play)
		//设置动画的时间步
		SetTimer(1, 15, NULL);
	else
		KillTimer(1);

}

void CAnimateView::OnUpdateFilePlay(CCmdUI* pCmdUI) 
{
	//对播放菜单的控制
	pCmdUI->SetCheck(m_play);
	
}

void CAnimateView::OnTimer(UINT nIDEvent) 
{
	//对时间的操作
	DrawScene();

	CView::OnTimer(nIDEvent);

	// Eat spurious WM_TIMER messages
	MSG msg;
	while(::PeekMessage(&msg, m_hWnd, WM_TIMER, WM_TIMER, PM_REMOVE));
}