texturesurfview.cpp

C:Documents and SettingsAdministrator桌面VC++多媒体特效制作百例CHAR17TextureSurf

// TextureSurfView.cpp : implementation of the CTextureSurfView class
//

#include "stdafx.h"
#include "TextureSurf.h"

#include "TextureSurfDoc.h"
#include "TextureSurfView.h"

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

#include "math.h"
//add up

//add down控制顶点的坐标
GLfloat ctrlpoints[4][4][3] = 
{
   {{ -1.5, -1.5, 4.0}, { -0.5, -1.5, 2.0}, 
    {0.5, -1.5, -1.0}, {1.5, -1.5, 2.0}}, 
   {{ -1.5, -0.5, 1.0}, { -0.5, -0.5, 3.0}, 
    {0.5, -0.5, 0.0}, {1.5, -0.5, -1.0}}, 
   {{ -1.5, 0.5, 4.0}, { -0.5, 0.5, 0.0}, 
    {0.5, 0.5, 3.0}, {1.5, 0.5, 4.0}}, 
   {{ -1.5, 1.5, -2.0}, { -0.5, 1.5, -2.0}, 
    {0.5, 1.5, 0.0}, {1.5, 1.5, -1.0}}
};
//add up控制顶点的坐标

//add down 纹理常量
GLfloat texpts[2][2][2] = 
{
	{{0.0, 0.0}, {0.0, 1.0}}, 
	{{1.0, 0.0}, {1.0, 1.0}}
};
//add up 纹理常量

//add down 定义常量
#define	imageWidth 64
#define	imageHeight 64
GLubyte image[3*imageWidth*imageHeight];
//add up 定义常量

//add down函数声明
void makeImage(void);
//add up函数声明

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

/////////////////////////////////////////////////////////////////////////////
// CTextureSurfView

IMPLEMENT_DYNCREATE(CTextureSurfView, CView)

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

/////////////////////////////////////////////////////////////////////////////
// CTextureSurfView construction/destruction

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

CTextureSurfView::~CTextureSurfView()
{
}

BOOL CTextureSurfView::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);
}

/////////////////////////////////////////////////////////////////////////////
// CTextureSurfView drawing

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

/////////////////////////////////////////////////////////////////////////////
// CTextureSurfView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CTextureSurfView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CTextureSurfView message handlers

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

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

void CTextureSurfView::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(-4.0, 4.0, -4.0*(GLfloat)h/(GLfloat)w, 
               4.0*(GLfloat)h/(GLfloat)w, -4.0, 4.0);
    else
       glOrtho(-4.0*(GLfloat)w/(GLfloat)h, 
               4.0*(GLfloat)w/(GLfloat)h, -4.0, 4.0, -4.0, 4.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    glRotatef(85.0, 1.0, 1.0, 1.0);
	//add up
}

//add down
void CTextureSurfView::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);

    //定义纹理
	glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4,
            0, 1, 12, 4, &ctrlpoints[0][0][0]);
    glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 
            0, 1, 4, 2, &texpts[0][0][0]);
    glEnable(GL_MAP2_TEXTURE_COORD_2);
    glEnable(GL_MAP2_VERTEX_3);
    glMapGrid2f(20, 0.0, 1.0, 20, 0.0, 1.0);
    makeImage();
    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, imageWidth, imageHeight, 0,
                 GL_RGB, GL_UNSIGNED_BYTE, image);
    glEnable(GL_TEXTURE_2D);
    glEnable(GL_DEPTH_TEST);
    glShadeModel (GL_FLAT);
}

BOOL CTextureSurfView::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 CTextureSurfView::DrawScene(void)
{
	//清除颜色缓冲区和深度缓冲区
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glColor3f(1.0, 1.0, 1.0);
    glEvalMesh2(GL_FILL, 0, 20, 0, 20);
    glFlush();

	glFinish();
	SwapBuffers(wglGetCurrentDC());
}

void makeImage(void)
{
   int i, j;
   float ti, tj;
   
   for (i = 0; i < imageWidth; i++) {
      ti = 2.0*3.14159265*i/imageWidth;
      for (j = 0; j < imageHeight; j++) {
         tj = 2.0*3.14159265*j/imageHeight;

         image[3*(imageHeight*i+j)] = (GLubyte) 127*(1.0+sin(ti));
         image[3*(imageHeight*i+j)+1] = (GLubyte) 127*(1.0+cos(2*tj));
         image[3*(imageHeight*i+j)+2] = (GLubyte) 127*(1.0+cos(ti+tj));
      }
   }
}
//add up