opengl.cpp

一个关于FTP的客户端的代码

// OpenGL.cpp: implementation of the COpenGL class.
//
//////////////////////////////////////////////////////////////////////

#include "OpenGL.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

COpenGL::COpenGL()
{
	m_x_res=GetSystemMetrics(SM_CXSCREEN);
	m_y_res=GetSystemMetrics(SM_CYSCREEN);
	m_bit_depth=16;

	m_tri_angle=7;
	m_quad_angle=0;
}

COpenGL::~COpenGL()
{

}

void COpenGL::SceneInit()
{
	int w,h;

	w=m_x_res;
	h=m_y_res;

	LoadTextures();
	glEnable(GL_TEXTURE_2D);
	glShadeModel(GL_SMOOTH);
	glClearColor(0.0,0.0,0.0,0.5);
	glClearDepth(1.0F);
	glEnable(GL_DEPTH_TEST);
	glDepthFunc(GL_LEQUAL);
	glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST);
}

void COpenGL::SceneResizeViewport()
{
	int w,h;

	GetClientRect(m_h_wnd,&m_rect);
	
	w=m_rect.right-m_rect.left;
	h=m_rect.bottom-m_rect.top;

	if(!(w>0 && h>0))
	{
		return;
	}

	m_aspect=(GLfloat)w/(GLfloat)h;

	glViewport(0,0,w,h);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();

	gluPerspective(45.0f,m_aspect,0.1f,100.0f);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
}

void COpenGL::EnableOpenGL()
{
	int iFormat;
	PIXELFORMATDESCRIPTOR pfd;

	m_h_dc=GetDC(m_h_wnd);

	ZeroMemory(&pfd,sizeof(pfd));
	pfd.nSize=sizeof(pfd);
	pfd.nVersion=1;
	pfd.dwFlags=PFD_DRAW_TO_WINDOW |
				PFD_SUPPORT_OPENGL |
				PFD_DOUBLEBUFFER;
	pfd.iPixelType=PFD_TYPE_RGBA;
	pfd.iLayerType=PFD_MAIN_PLANE;
	pfd.cColorBits=16;
	pfd.cDepthBits=16;

	iFormat=ChoosePixelFormat(m_h_dc,&pfd);

	SetPixelFormat(m_h_dc,iFormat,&pfd);

	m_h_rc=wglCreateContext(m_h_dc);
	wglMakeCurrent(m_h_dc,m_h_rc);
}

void COpenGL::DisableOpenGL()
{
	wglMakeCurrent(NULL,NULL);
	wglDeleteContext(m_h_rc);
	ReleaseDC(m_h_wnd,m_h_dc);
}

bool COpenGL::ChangeResolution()
{
	int w,h,bitdepth;

	w=m_x_res;
	h=m_y_res;
	bitdepth=m_bit_depth;

	bool	bRet;
	DEVMODE devMode;
	int		modeSwitch;
	int		closeMode=0;

	EnumDisplaySettings(NULL,closeMode,&devMode);

	devMode.dmBitsPerPel=bitdepth;
	devMode.dmPelsWidth=w;
	devMode.dmPelsHeight=h;
	devMode.dmFields=DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;

	modeSwitch=ChangeDisplaySettings(&devMode,CDS_FULLSCREEN);

	if(modeSwitch==DISP_CHANGE_SUCCESSFUL)
	{
		bRet=true;
	}
	else
	{
		ChangeDisplaySettings(NULL,0);
		bRet=false;
	}

	return bRet;
}

void COpenGL::SetWindowParam(HWND hWnd, HINSTANCE hInstance,int w, int h, int bitdepth)
{
	m_h_wnd=hWnd;
	m_h_instance=hInstance;

	m_x_res=w;
	m_y_res=h;
	m_bit_depth=bitdepth;
}

void COpenGL::SceneShow(GLvoid)
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	//DrawTriangle_3d();
	//DrawRectangle_3d();

	DrawRectange_3d_picture();
}

void COpenGL::DrawTriangle()
{
	glLoadIdentity();
	glTranslatef(-1.5f,0.0f,-6.0f);

	glRotatef(m_tri_angle,0.0f,1.0f,0.0f);
	m_tri_angle+=1;
	if(m_tri_angle>=360)
	{
		m_tri_angle=0;
	}

	glBegin(GL_TRIANGLES);
		glColor3f(1.0f,0.0f,0.0f);
		glVertex3f(0.0f , 1.0f,0.0f);

		glColor3f(0.0f,1.0f,0.0f);
		glVertex3f(-1.0f,-1.0f,0.0f);

		glColor3f(0.0f,0.0f,1.0f);
		glVertex3f(1.0f ,-1.0f,0.0f);
	glEnd();
}

void COpenGL::DrawRectangle()
{
	glLoadIdentity();
	glTranslatef(1.5f,0.0f,-6.0f);

	glRotatef(m_quad_angle,0.0f,-1.0f,0.0f);
	m_quad_angle+=1;
	if(m_quad_angle>=360)
	{
		m_quad_angle=0;
	}

	glBegin(GL_QUADS);
		glVertex3f(-1.0f , 1.0f,0.0f);
		glVertex3f(-1.0f,-1.0f,0.0f);
		glVertex3f(1.0f ,-1.0f,0.0f);
		glVertex3f(1.0f ,1.0f,0.0f);
	glEnd();
}

void COpenGL::DrawTriangle_3d()
{
	glLoadIdentity();
	glTranslatef(-1.5f,0.0f,-6.0f);

	glRotatef(m_tri_angle,1.0f,1.0f,-1.0f);
	m_tri_angle+=1;
	if(m_tri_angle>=360)
	{
		m_tri_angle=0;
	}

	glBegin(GL_TRIANGLES);
		
		//前面
		glColor3f(1.0f,0.0f,0.0f);
		glVertex3f(0.0f , 1.0f,0.0f);

		glColor3f(0.0f,1.0f,0.0f);
		glVertex3f(-1.0f,-1.0f,1.0f);

		glColor3f(0.0f,0.0f,1.0f);
		glVertex3f(1.0f ,-1.0f,1.0f);

		//右面
		glColor3f(1.0f,0.0f,0.0f);
		glVertex3f(0.0f , 1.0f,0.0f);

		glColor3f(0.0f,1.0f,0.0f);
		glVertex3f(1.0f,-1.0f,1.0f);

		glColor3f(0.0f,0.0f,1.0f);
		glVertex3f(1.0f ,-1.0f,-1.0f);

		//后面
		glColor3f(1.0f,0.0f,0.0f);
		glVertex3f(0.0f , 1.0f,0.0f);

		glColor3f(0.0f,1.0f,0.0f);
		glVertex3f(1.0f,-1.0f,-1.0f);

		glColor3f(0.0f,0.0f,1.0f);
		glVertex3f(-1.0f ,-1.0f,-1.0f);

		//左面
		glColor3f(1.0f,0.0f,0.0f);
		glVertex3f(0.0f , 1.0f,0.0f);

		glColor3f(0.0f,1.0f,0.0f);
		glVertex3f(-1.0f,-1.0f,-1.0f);

		glColor3f(0.0f,0.0f,1.0f);
		glVertex3f(-1.0f ,-1.0f,1.0f);
	glEnd();

	glBegin(GL_QUADS);
		//底面
		glColor3f(1.0f,0.0f,0.0f);
		glVertex3f(-1.0f,-1.0f,1.0f);

		glColor3f(0.0f,1.0f,0.0f);
		glVertex3f(-1.0f,-1.0f,-1.0f);

		glColor3f(0.0f,0.0f,1.0f);
		glVertex3f(1.0f ,-1.0f,-1.0f);

		glColor3f(1.0f,0.0f,0.0f);
		glVertex3f(1.0f ,-1.0f,1.0f);
	glEnd();
}

void COpenGL::DrawRectangle_3d()
{
	glLoadIdentity();
	glTranslatef(1.5f,0.0f,-6.0f);

	glRotatef(m_quad_angle,1.0f,1.0f,1.0f);
	m_quad_angle+=1;
	if(m_quad_angle>=360)
	{
		m_quad_angle=0;
	}

	glBegin(GL_QUADS);
		//前面
		glColor3f(1.0f,0.0f,0.0f);
		glVertex3f(-1.0f , 1.0f,1.0f);
		glVertex3f(-1.0f,-1.0f,1.0f);
		glVertex3f(1.0f ,-1.0f,1.0f);
		glVertex3f(1.0f ,1.0f,1.0f);

		//右面
		glColor3f(0.0f,1.0f,0.0f);
		glVertex3f(1.0f,1.0f,1.0f);
		glVertex3f(1.0f,-1.0f,1.0f);
		glVertex3f(1.0f,-1.0f,-1.0f);
		glVertex3f(1.0f,1.0f,-1.0f);

		//后面
		glColor3f(0.0f,0.0f,1.0f);
		glVertex3f(1.0f,1.0f,-1.0f);
		glVertex3f(1.0f,-1.0f,-1.0f);
		glVertex3f(-1.0f,-1.0f,-1.0f);
		glVertex3f(-1.0f,1.0f,-1.0f);

		//左面
		glColor3f(1.0f,1.0f,0.0f);
		glVertex3f(-1.0f , 1.0f,-1.0f);
		glVertex3f(-1.0f,-1.0f,-1.0f);
		glVertex3f(-1.0f ,-1.0f,1.0f);
		glVertex3f(-1.0f ,1.0f,1.0f);

		//上面
		glColor3f(1.0f,0.0f,1.0f);
		glVertex3f(-1.0f , 1.0f,-1.0f);
		glVertex3f(-1.0f,1.0f,1.0f);
		glVertex3f(1.0f ,1.0f,1.0f);
		glVertex3f(1.0f ,1.0f,-1.0f);

		//下面
		glColor3f(0.0f,1.0f,1.0f);
		glVertex3f(-1.0f ,-1.0f,1.0f);
		glVertex3f(-1.0f,-1.0f,-1.0f);
		glVertex3f(1.0f ,-1.0f,-1.0f);
		glVertex3f(1.0f ,-1.0f,1.0f);
	glEnd();
}

AUX_RGBImageRec* COpenGL::LoadBMP(char *filename)
{
	FILE *file=NULL;
	if(!filename)
	{
		return NULL;
	}

	file=fopen(filename,"r");
	if(file)
	{
		fclose(file);
		return auxDIBImageLoad(filename);
	}
	return NULL;
}

int COpenGL::LoadTextures()
{
	int status=FALSE;

	AUX_RGBImageRec *TextureImage[1];

	memset(TextureImage,0,sizeof(void*)*1);

	if(TextureImage[0]=LoadBMP("Test.bmp"))
	{
		status=TRUE;

		glGenTextures(1,&m_texture[0]);

		glBindTexture(GL_TEXTURE_2D,m_texture[0]);
		glTexImage2D(GL_TEXTURE_2D,0,3,TextureImage[0]->sizeX,
			TextureImage[0]->sizeY,0,GL_RGB,GL_UNSIGNED_BYTE,
			TextureImage[0]->data);
		glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
	}

	if(TextureImage[0])
	{
		if(TextureImage[0]->data)
		{
			free(TextureImage[0]->data);
		}
		free(TextureImage[0]);
	}
	return status;
}

void COpenGL::DrawRectange_3d_picture()
{
	glLoadIdentity();
	glTranslatef(0.0f,0.0f,-5.0f);

	glRotatef(m_quad_angle,1.0f,1.0f,1.0f);
	m_quad_angle+=1;
	if(m_quad_angle>=360)
	{
		m_quad_angle=0;
	}

	glBindTexture(GL_TEXTURE_2D,m_texture[0]);

	glBegin(GL_QUADS);
		//前面
		glTexCoord2f(0.0f,1.0f);glVertex3f(-1.0f , 1.0f,1.0f);
		glTexCoord2f(0.0f,0.0f);glVertex3f(-1.0f,-1.0f,1.0f);
		glTexCoord2f(1.0f,0.0f);glVertex3f(1.0f ,-1.0f,1.0f);
		glTexCoord2f(1.0f,1.0f);glVertex3f(1.0f ,1.0f,1.0f);

		//右面
		glTexCoord2f(0.0f,1.0f);glVertex3f(1.0f,1.0f,1.0f);
		glTexCoord2f(0.0f,0.0f);glVertex3f(1.0f,-1.0f,1.0f);
		glTexCoord2f(1.0f,0.0f);glVertex3f(1.0f,-1.0f,-1.0f);
		glTexCoord2f(1.0f,1.0f);glVertex3f(1.0f,1.0f,-1.0f);

		//后面
		glTexCoord2f(0.0f,1.0f);glVertex3f(1.0f,1.0f,-1.0f);
		glTexCoord2f(0.0f,0.0f);glVertex3f(1.0f,-1.0f,-1.0f);
		glTexCoord2f(1.0f,0.0f);glVertex3f(-1.0f,-1.0f,-1.0f);
		glTexCoord2f(1.0f,1.0f);glVertex3f(-1.0f,1.0f,-1.0f);

		//左面
		glTexCoord2f(0.0f,1.0f);glVertex3f(-1.0f , 1.0f,-1.0f);
		glTexCoord2f(0.0f,0.0f);glVertex3f(-1.0f,-1.0f,-1.0f);
		glTexCoord2f(1.0f,0.0f);glVertex3f(-1.0f ,-1.0f,1.0f);
		glTexCoord2f(1.0f,1.0f);glVertex3f(-1.0f ,1.0f,1.0f);

		//上面
		glTexCoord2f(0.0f,1.0f);glVertex3f(-1.0f , 1.0f,-1.0f);
		glTexCoord2f(0.0f,0.0f);glVertex3f(-1.0f,1.0f,1.0f);
		glTexCoord2f(1.0f,0.0f);glVertex3f(1.0f ,1.0f,1.0f);
		glTexCoord2f(1.0f,1.0f);glVertex3f(1.0f ,1.0f,-1.0f);

		//下面
		glTexCoord2f(0.0f,1.0f);glVertex3f(-1.0f ,-1.0f,1.0f);
		glTexCoord2f(0.0f,0.0f);glVertex3f(-1.0f,-1.0f,-1.0f);
		glTexCoord2f(1.0f,0.0f);glVertex3f(1.0f ,-1.0f,-1.0f);
		glTexCoord2f(1.0f,1.0f);glVertex3f(1.0f ,-1.0f,1.0f);
	glEnd();
}