GLuint	texture[2];
int		texnumber=0;
vector<char *>vtex;

GLvoid InitTextures(GLvoid)
{
	vtex.push_back("textur001.bmp");
	vtex.push_back("textur2.bmp");
}
GLvoid ReSizeGLScene(GLsizei width, GLsizei height)		// Resize And Initialize The GL Window
{
	if (height==0)										// Prevent A Divide By Zero By
	{
		height=1;										// Making Height Equal One
	}

	glViewport(0,0,width,height);						// Reset The Current Viewport

	glMatrixMode(GL_PROJECTION);						// Select The Projection Matrix
	glLoadIdentity();									// Reset The Projection Matrix

	// Calculate The Aspect Ratio Of The Window
	gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);

	glMatrixMode(GL_MODELVIEW);							// Select The Modelview Matrix
	glLoadIdentity();									// Reset The Modelview Matrix
}

int DrawGLScene(GLvoid)
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();
	glTranslatef(-1.5f,0.0f,-6.0f);

	
	glRotatef(xrot,1.0f,0.0f,0.0f);

	glBindTexture(GL_TEXTURE_2D, texture[1]);
	glBegin(GL_QUADS);
		glTexCoord2f(0.0f, 0.0f); 
		glVertex3f(-1.0f, -1.0f,  1.0f);	// Bottom Left Of The Texture and Quad
		glTexCoord2f(1.0f, 0.0f); 
		glVertex3f( 1.0f, -1.0f,  1.0f);	// Bottom Right Of The Texture and Quad
		glTexCoord2f(1.0f, 1.0f); 
		glVertex3f( 1.0f,  1.0f,  1.0f);	// Top Right Of The Texture and Quad
		glTexCoord2f(0.0f, 1.0f); 
		glVertex3f(-1.0f,  1.0f,  1.0f);
	glEnd();

		
	glBindTexture(GL_TEXTURE_2D, texture[0]);
	glBegin(GL_QUADS);
		glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f);	// Top Right Of The Texture and Quad
		glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f);	// Top Left Of The Texture and Quad
		glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);	// Bottom Left Of The Texture and Quad
		glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);
	glEnd();

	xrot+=0.5f;
	return TRUE;
}

AUX_RGBImageRec *LoadBMP(char *Filename)	//lädt eine bitmap
{
	FILE *File=NULL;						//unser zeiger auf ne file
	if(!Filename)
	{return NULL;}
	File=fopen(Filename,"r");
	if(File)
	{
		fclose(File);
		return auxDIBImageLoad(Filename);
	}
	return NULL;
}

int LoadGLTextures(int texno)
{
	int Status=FALSE;
	AUX_RGBImageRec *TextureImage[1]; 
	memset(TextureImage,0,sizeof(void *)*1);
	if(TextureImage[0]=LoadBMP(vtex[texno]))
	{
		Status=TRUE;
		glGenTextures(vtex.size(),&texture[texno]);
		glBindTexture(GL_TEXTURE_2D,texture[texno]);
		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);	// Lineare Filterung bei Objekten, die weiter entfernt liegen
		glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);	// Lineare Filterung bei Objekten, die näher an den betrachter kommen.
	}
	if(TextureImage[0])
	{
		if(TextureImage[0]->data)
		{free(TextureImage[0]->data);}
		free(TextureImage[0]);
	}
	return Status;
}

int InitGL(GLvoid)										// All Setup For OpenGL Goes Here
{
	InitTextures();
	for(texnumber=vtex.size()-1;texnumber>=0;texnumber--)
	{
		if(!LoadGLTextures(texnumber))
		{return FALSE;}
	}
	glEnable(GL_TEXTURE_2D);
	glShadeModel(GL_SMOOTH);							// Enable Smooth Shading
	glClearColor(0.0f, 0.0f, 0.0f, 0.5f);				// Black Background
	glClearDepth(1.0f);									// Depth Buffer Setup
	glEnable(GL_DEPTH_TEST);							// Enables Depth Testing
	glDepthFunc(GL_LEQUAL);								// The Type Of Depth Testing To Do
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);	// Really Nice Perspective Calculations
	return TRUE;										// Initialization Went OK
}