// QuadricView.cpp : implementation of the CQuadricView class
//

#include "stdafx.h"
#include "Quadric.h"

#include "QuadricDoc.h"
#include "QuadricView.h"

//add down加入OpenGL頭文件
#include "gl\gl.h"
#include "gl\glu.h"
#include "gl\glaux.h"

#include <stdio.h>
#include <stdlib.h>

GLuint startList;
//add up加入OpenGL頭文件

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

/////////////////////////////////////////////////////////////////////////////
// CQuadricView

IMPLEMENT_DYNCREATE(CQuadricView, CView)

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

/////////////////////////////////////////////////////////////////////////////
// CQuadricView construction/destruction

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

}

CQuadricView::~CQuadricView()
{
}

BOOL CQuadricView::PreCreateWindow(CREATESTRUCT& cs)
{
	//add down
	cs.style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
	//add up

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CQuadricView drawing

void CQuadricView::OnDraw(CDC* pDC)
{
	CQuadricDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	//add down
	DrawScene();
	//add up
}

/////////////////////////////////////////////////////////////////////////////
// CQuadricView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CQuadricView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CQuadricView message handlers

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

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

void CQuadricView::OnSize(UINT nType, int cx, int cy) 
{
	CView::OnSize(nType, cx, cy);
	
   glViewport(0, 0, (GLsizei) cx, (GLsizei)cy);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   if (cx <= cy)
      glOrtho(-2.5, 2.5, -2.5*(GLfloat)cy/(GLfloat)cx,
         2.5*(GLfloat)cy/(GLfloat)cx, -10.0, 10.0);
   else
      glOrtho(-2.5*(GLfloat)cx/(GLfloat)cy,
         2.5*(GLfloat)cx/(GLfloat)cy, -2.5, 2.5, -10.0, 10.0);
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
}

//add down
void CQuadricView::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);

   GLUquadricObj *qobj;
   GLfloat mat_ambient[] = { 0.5, 0.5, 0.5, 1.0 };
   GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
   GLfloat mat_shininess[] = { 50.0 };
   GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
   GLfloat model_ambient[] = { 0.5, 0.5, 0.5, 1.0 };

   glClearColor(0.0, 0.0, 0.0, 0.0);

   glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
   glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
   glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
   glLightfv(GL_LIGHT0, GL_POSITION, light_position);
   glLightModelfv(GL_LIGHT_MODEL_AMBIENT, model_ambient);

   glEnable(GL_LIGHTING);
   glEnable(GL_LIGHT0);
   glEnable(GL_DEPTH_TEST);

/*  Create 4 display lists, each with a different quadric object.
 *  Different drawing styles and surface normal specifications
 *  are demonstrated.
 */
   startList = glGenLists(4);
   qobj = gluNewQuadric();

   gluQuadricDrawStyle(qobj, GLU_FILL); /* smooth shaded */
   gluQuadricNormals(qobj, GLU_SMOOTH);
   glNewList(startList, GL_COMPILE);
      gluSphere(qobj, 0.75, 15, 10);
   glEndList();

   gluQuadricDrawStyle(qobj, GLU_FILL); /* flat shaded */
   gluQuadricNormals(qobj, GLU_FLAT);
   glNewList(startList+1, GL_COMPILE);
      gluCylinder(qobj, 0.5, 0.3, 1.0, 15, 5);
   glEndList();

   gluQuadricDrawStyle(qobj, GLU_LINE); /* all polygons wireframe */
   gluQuadricNormals(qobj, GLU_NONE);
   glNewList(startList+2, GL_COMPILE);
      gluDisk(qobj, 0.25, 1.0, 20, 4);
   glEndList();

   gluQuadricDrawStyle(qobj, GLU_SILHOUETTE); /* boundary only  */
   gluQuadricNormals(qobj, GLU_NONE);
   glNewList(startList+3, GL_COMPILE);
      gluPartialDisk(qobj, 0.0, 1.0, 20, 4, 0.0, 225.0);
   glEndList();
}

BOOL CQuadricView::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 CQuadricView::DrawScene(void)
{
//	glClearColor(1.0,1.0,1.0,0.0);
   glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   glPushMatrix();

   glEnable(GL_LIGHTING);
   glShadeModel (GL_SMOOTH);
   glTranslatef(-1.0, -1.0, 0.0);
   glCallList(startList);

   glShadeModel (GL_FLAT);
   glTranslatef(0.0, 2.0, 0.0);
   glPushMatrix();
   glRotatef(300.0, 1.0, 0.0, 0.0);
   glCallList(startList+1);
   glPopMatrix();

   glDisable(GL_LIGHTING);
   glColor3f(0.0, 1.0, 1.0);
   glTranslatef(2.0, -2.0, 0.0);
   glCallList(startList+2);

   glColor3f(1.0, 1.0, 0.0);
   glTranslatef(0.0, 2.0, 0.0);
   glCallList(startList+3);

   glPopMatrix();
   
   SwapBuffers(wglGetCurrentDC());
}

//add up