jingshenview.cpp

C++编程100例

// JingShenView.cpp : implementation of the CJingShenView class
//

#include "stdafx.h"
#include "JingShen.h"

#include "JingShenDoc.h"
#include "JingShenView.h"

//add down
#include "gl\gl.h"
#include "gl\glu.h"
#include "gl\glaux.h"
#include <stdlib.h>
#include <math.h>
#include "jitter.h"
#define PI_ 3.1415926
GLuint SphereList;
void accFrustum(GLdouble left, GLdouble right, GLdouble bottom, 
   GLdouble top, GLdouble near, GLdouble far, GLdouble pixdx, 
   GLdouble pixdy, GLdouble eyedx, GLdouble eyedy, GLdouble focus);

void accPerspective(GLdouble fovy, GLdouble aspect, 
   GLdouble near, GLdouble far, GLdouble pixdx, GLdouble pixdy, 
   GLdouble eyedx, GLdouble eyedy, GLdouble focus);

void renderSphere (GLfloat x, GLfloat y, GLfloat z, 
   GLfloat ambr, GLfloat ambg, GLfloat ambb, 
   GLfloat difr, GLfloat difg, GLfloat difb, 
   GLfloat specr, GLfloat specg, GLfloat specb, GLfloat shine);
#ifdef WIN32
#define near zNear
#define far zFar
#endif
//add up


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

/////////////////////////////////////////////////////////////////////////////
// CJingShenView

IMPLEMENT_DYNCREATE(CJingShenView, CView)

BEGIN_MESSAGE_MAP(CJingShenView, CView)
	//{{AFX_MSG_MAP(CJingShenView)
	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()

/////////////////////////////////////////////////////////////////////////////
// CJingShenView construction/destruction

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

}

CJingShenView::~CJingShenView()
{
}

BOOL CJingShenView::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);
}

/////////////////////////////////////////////////////////////////////////////
// CJingShenView drawing

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

/////////////////////////////////////////////////////////////////////////////
// CJingShenView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CJingShenView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CJingShenView message handlers

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

void CJingShenView::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 CJingShenView::OnEraseBkgnd(CDC* pDC) 
{
	return TRUE;
}

void CJingShenView::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
    glViewport(0, 0, (GLsizei) w, (GLsizei) h);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
	//add up
	
}
void CJingShenView::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);

   GLfloat ambient[] = { 0.0, 0.0, 0.0, 1.0 };
   GLfloat diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
   GLfloat specular[] = { 1.0, 1.0, 1.0, 1.0 };
   GLfloat position[] = { 0.0, 3.0, 3.0, 0.0 };
    
   GLfloat lmodel_ambient[] = { 0.2, 0.2, 0.2, 1.0 };
   GLfloat local_view[] = { 0.0 };

   glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
   glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
   glLightfv(GL_LIGHT0, GL_POSITION, position);
    
   glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
   glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, local_view);

   glFrontFace (GL_CW);
   glEnable(GL_LIGHTING);
   glEnable(GL_LIGHT0);
   glEnable(GL_AUTO_NORMAL);
   glEnable(GL_NORMALIZE);
   glEnable(GL_DEPTH_TEST);

   glClearColor(1.0, 1.0, 1.0, 0.0);
   glClearAccum(0.0, 0.0, 0.0, 0.0); 
/*  make sphere display list */
   SphereList = glGenLists(1);
   glNewList (SphereList, GL_COMPILE);
   auxSolidSphere (0.5);
   glEndList ();
}

BOOL CJingShenView::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 CJingShenView::DrawScene(void)
{
   int jitter;
   GLint viewport[4];

   glGetIntegerv (GL_VIEWPORT, viewport);
   glClear(GL_ACCUM_BUFFER_BIT);

   for (jitter = 0; jitter < 8; jitter++) {
	//清除颜色缓冲区和深度缓冲区
      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
      accPerspective (45.0, 
         (GLdouble) viewport[2]/(GLdouble) viewport[3], 
         1.0, 15.0, 0.0, 0.0,
         0.33*j8[jitter].x, 0.33*j8[jitter].y, 5.0);

/*	ruby, gold, silver, emerald, and cyan spheres	*/
      renderSphere (-1.1, -0.5, -4.5, 0.1745, 0.01175, 
                    0.01175, 0.61424, 0.04136, 0.04136, 
                    0.727811, 0.626959, 0.626959, 0.6);
      renderSphere (-0.5, -0.5, -5.0, 0.24725, 0.1995, 
                    0.0745, 0.75164, 0.60648, 0.22648, 
                    0.628281, 0.555802, 0.366065, 0.4);
      renderSphere (0.2, -0.5, -5.5, 0.19225, 0.19225, 
                    0.19225, 0.50754, 0.50754, 0.50754, 
                    0.508273, 0.508273, 0.508273, 0.4);
      renderSphere (1.0, -0.5, -6.0, 0.0215, 0.1745, 0.0215, 
                    0.07568, 0.61424, 0.07568, 0.633, 
                    0.727811, 0.633, 0.6);
      renderSphere (1.8, -0.5, -6.5, 0.0, 0.1, 0.06, 0.0, 
                    0.50980392, 0.50980392, 0.50196078, 
                    0.50196078, 0.50196078, 0.25);
      glAccum (GL_ACCUM, 0.125);
	  glFlush();
	  auxSwapBuffers();
   }
   glAccum (GL_RETURN, 1.0);

	GLfloat white[3]={1.0,1.0,1.0};
	int i,j;
	char teststring[33];

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


void accFrustum(GLdouble left, GLdouble right, GLdouble bottom, 
   GLdouble top, GLdouble near, GLdouble far, GLdouble pixdx, 
   GLdouble pixdy, GLdouble eyedx, GLdouble eyedy, GLdouble focus)
{
   GLdouble xwsize, ywsize; 
   GLdouble dx, dy;
   GLint viewport[4];

   glGetIntegerv (GL_VIEWPORT, viewport);
	
   xwsize = right - left;
   ywsize = top - bottom;
	
   dx = -(pixdx*xwsize/(GLdouble) viewport[2] + eyedx*near/focus);
   dy = -(pixdy*ywsize/(GLdouble) viewport[3] + eyedy*near/focus);
	
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   glFrustum (left + dx, right + dx, bottom + dy, top + dy, near, far);
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
   glTranslatef (-eyedx, -eyedy, 0.0);
}


void accPerspective(GLdouble fovy, GLdouble aspect, 
   GLdouble near, GLdouble far, GLdouble pixdx, GLdouble pixdy, 
   GLdouble eyedx, GLdouble eyedy, GLdouble focus)
{
   GLdouble fov2,left,right,bottom,top;

   fov2 = ((fovy*PI_) / 180.0) / 2.0;

   top = near / (cos(fov2) / sin(fov2));
   bottom = -top;

   right = top * aspect;
   left = -right;

   accFrustum (left, right, bottom, top, near, far,pixdx, pixdy, eyedx, eyedy, focus);
}

void renderSphere (GLfloat x, GLfloat y, GLfloat z, 
   GLfloat ambr, GLfloat ambg, GLfloat ambb, 
   GLfloat difr, GLfloat difg, GLfloat difb, 
   GLfloat specr, GLfloat specg, GLfloat specb, GLfloat shine)
{
   GLfloat mat[4];

   glPushMatrix();
   glTranslatef (x, y, z);
   mat[0] = ambr; mat[1] = ambg; mat[2] = ambb; mat[3] = 1.0;	
   glMaterialfv (GL_FRONT, GL_AMBIENT, mat);
   mat[0] = difr; mat[1] = difg; mat[2] = difb;	
   glMaterialfv (GL_FRONT, GL_DIFFUSE, mat);
   mat[0] = specr; mat[1] = specg; mat[2] = specb;
   glMaterialfv (GL_FRONT, GL_SPECULAR, mat);
   glMaterialf (GL_FRONT, GL_SHININESS, shine*128.0);
   glCallList(SphereList);
   glPopMatrix();
}