polygnstippleview.cpp

C:Documents and SettingsAdministrator桌面VC++多媒体特效制作百例CHAR17PolygnStipple

// PolygnStippleView.cpp : implementation of the CPolygnStippleView class
//

#include "stdafx.h"
#include "PolygnStipple.h"

#include "PolygnStippleDoc.h"
#include "PolygnStippleView.h"

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

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

/////////////////////////////////////////////////////////////////////////////
// CPolygnStippleView

IMPLEMENT_DYNCREATE(CPolygnStippleView, CView)

BEGIN_MESSAGE_MAP(CPolygnStippleView, CView)
	//{{AFX_MSG_MAP(CPolygnStippleView)
	ON_WM_CREATE()
	ON_WM_DESTROY()
	ON_WM_ERASEBKGND()
	ON_WM_SIZE()
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CPolygnStippleView construction/destruction

CPolygnStippleView::CPolygnStippleView()
{
	//add down
	m_pDC = NULL;
	//add up
}

CPolygnStippleView::~CPolygnStippleView()
{
}

BOOL CPolygnStippleView::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);
}

/////////////////////////////////////////////////////////////////////////////
// CPolygnStippleView drawing

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

/////////////////////////////////////////////////////////////////////////////
// CPolygnStippleView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CPolygnStippleView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CPolygnStippleView message handlers

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

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

	hrc = ::wglGetCurrentContext();

	::wglMakeCurrent(NULL,  NULL);

	if (hrc)
		::wglDeleteContext(hrc);

	if (m_pDC)
		delete m_pDC;
	//add up

	CView::OnDestroy();
}

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

void CPolygnStippleView::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 (w <= h)
       glOrtho(-500.0, 500.0, -500.0*(GLfloat)h/(GLfloat)w, 
                500.0*(GLfloat)h/(GLfloat)w, -500.0, 500.0);
    else
       glOrtho(-500.0*(GLfloat)w/(GLfloat)h, 
                500.0*(GLfloat)w/(GLfloat)h, -500.0, 500.0, -500.0, 500.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
	//add up
}

//add down
void CPolygnStippleView::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);

   glClearColor(1.0, 1.0, 1.0, 0.0);
   glShadeModel(GL_FLAT);
}

BOOL CPolygnStippleView::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 CPolygnStippleView::DrawScene(void)
{
	//定义填充模式（32x32）
	GLubyte pattern[]=
	{
		0x00,0x01,0x80,0x00,
		0x00,0x03,0xc0,0x00,
		0x00,0x07,0xe0,0x00,
		0x00,0x0f,0xf0,0x00,
		0x00,0x1f,0xf8,0x00,
		0x00,0x3f,0xfc,0x00,
		0x00,0x7f,0xfe,0x00,
		0x00,0xff,0xff,0x00,
		0x01,0xff,0xff,0x80,
		0x03,0xff,0xff,0xc0,
		0x07,0xff,0xff,0xe0,
		0x0f,0xff,0xff,0xf0,
		0x1f,0xff,0xff,0xf8,
		0x3f,0xff,0xff,0xfc,
		0x7f,0xff,0xff,0xfe,
		0xff,0xff,0xff,0xff,
		0xff,0xff,0xff,0xff,
		0x7f,0xff,0xff,0xfe,
		0x3f,0xff,0xff,0xfc,
		0x1f,0xff,0xff,0xf8,
		0x0f,0xff,0xff,0xf0,
		0x07,0xff,0xff,0xe0,
		0x03,0xff,0xff,0xc0,
		0x01,0xff,0xff,0x80,
		0x00,0xff,0xff,0x00,
		0x00,0x7f,0xfe,0x00,
		0x00,0x3f,0xfc,0x00,
		0x00,0x1f,0xf8,0x00,
		0x00,0x0f,0xf0,0x00,
		0x00,0x07,0xe0,0x00,
		0x00,0x03,0xc0,0x00,
		0x00,0x01,0x80,0x00
	};

	//清除颜色缓冲区
	glClear(GL_COLOR_BUFFER_BIT);

	//绘制一个以指定图案填充的矩形
    glColor3f(0.1, 0.8, 0.7);
	glEnable(GL_POLYGON_STIPPLE);
	glPolygonStipple(pattern);
	glRectf(48.0,80.0,210.0,305.0);

	//绘制一个以指定图案填充的三角形
    glColor3f(0.9, 0.86, 0.4);
	glPolygonStipple(pattern);
	glBegin(GL_TRIANGLES);
		glVertex2i(310,310);
		glVertex2i(220,80);
		glVertex2i(405,80);
	glEnd();
	glDisable(GL_POLYGON_STIPPLE);

	glFinish();
	SwapBuffers(wglGetCurrentDC());
}
//add up