Texturas Multiples

#include <GL\glut.h>
#include <GL\glaux.h>		
#include <windows.h>
#include <math.h>

class COGLTexture
{
 public:
 _AUX_RGBImageRec *Image;
 unsigned int GetID();
 void LoadFromFile(char *filename);
 void SetActive();
 int GetWidth();
 int GetHeight();
 private:
 int Width, Height;
 unsigned int ID;
};

COGLTexture Tex1, Tex2, Tex3, Tex4, Tex5, Tex6;

GLfloat XRotated=0.0;
GLfloat YRotated=0.0;
GLfloat ZRotated=0.0;

void COGLTexture::LoadFromFile(char *filename)
{
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glGenTextures(1,&ID); 
glBindTexture( GL_TEXTURE_2D, ID);
Image = auxDIBImageLoadA( (const char*) filename );
Width = Image->sizeX;
Height = Image->sizeY;
gluBuild2DMipmaps(GL_TEXTURE_2D, 3, Image->sizeX, Image->sizeY, GL_RGB,
		  GL_UNSIGNED_BYTE, Image->data);
delete Image;
}

void COGLTexture::SetActive()
{
glBindTexture( GL_TEXTURE_2D, ID);
}

unsigned int COGLTexture::GetID()
{
return ID;
}

void InitTextures(void)
{
 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_LINEAR);
 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
 Tex1.LoadFromFile("textura1.bmp");
 Tex2.LoadFromFile("textura2.bmp");
 Tex3.LoadFromFile("textura3.bmp");
 Tex4.LoadFromFile("textura4.bmp");
 Tex5.LoadFromFile("textura5.bmp");
 Tex6.LoadFromFile("textura6.bmp");
 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}

void DrawCube(void)
{
 glEnable(GL_TEXTURE_2D);

 //left:
 Tex1.SetActive();
 glBegin(GL_QUADS);
 glTexCoord2f(1.0,0.0);
 glVertex3f(-0.5,-0.5,-0.5);
 glTexCoord2f(1.0,1.0);
 glVertex3f(-0.5,0.5,-0.5);
 glTexCoord2f(0.0,1.0);
 glVertex3f(-0.5,0.5,0.5);
 glTexCoord2f(0.0,0.0);
 glVertex3f(-0.5,-0.5,0.5);
 glEnd();

 //right:
 Tex2.SetActive();
 glBegin(GL_QUADS);
 glTexCoord2f(0.0,0.0);
 glVertex3f(0.5,-0.5,-0.5);
 glTexCoord2f(1.0,0.0);
 glVertex3f(0.5,-0.5,0.5);
 glTexCoord2f(1.0,1.0);
 glVertex3f(0.5,0.5,0.5);
 glTexCoord2f(0.0,1.0);
 glVertex3f(0.5,0.5,-0.5);
 glEnd();

 //front:
 Tex3.SetActive();
 glBegin(GL_QUADS);
 glTexCoord2f(0.0,0.0);
 glVertex3f(-0.5,-0.5,0.5);
 glTexCoord2f(0.0,1.0);
 glVertex3f(-0.5,0.5,0.5);
 glTexCoord2f(1.0,1.0);
 glVertex3f(0.5,0.5,0.5);
 glTexCoord2f(1.0,0.0);
 glVertex3f(0.5,-0.5,0.5);
 glEnd();

 //back:
 Tex4.SetActive();
 glBegin(GL_QUADS);
 glTexCoord2f(0.0,0.0);
 glVertex3f(-0.5,-0.5,-0.5);
 glTexCoord2f(1.0,0.0);
 glVertex3f(0.5,-0.5,-0.5);
 glTexCoord2f(1.0,1.0);
 glVertex3f(0.5,0.5,-0.5);
 glTexCoord2f(0.0,1.0);
 glVertex3f(-0.5,0.5,-0.5);
 glEnd();

 //top:
 Tex5.SetActive();
 glBegin(GL_QUADS);
 glTexCoord2f(1.0,0.0);
 glVertex3f(-0.5,0.5,-0.5);
 glTexCoord2f(1.0,1.0);
 glVertex3f(0.5,0.5,-0.5);
 glTexCoord2f(0.0,1.0);
 glVertex3f(0.5,0.5,0.5);
 glTexCoord2f(0.0,0.0);
 glVertex3f(-0.5,0.5,0.5);
 glEnd();

 //bottom:
 Tex6.SetActive();
 glBegin(GL_QUADS);
 glTexCoord2f(1.0,0.0);
 glVertex3f(-0.5,-0.5,-0.5);
 glTexCoord2f(1.0,1.0);
 glVertex3f(-0.5,-0.5,0.5);
 glTexCoord2f(0.0,1.0);
 glVertex3f(0.5,-0.5,0.5);
 glTexCoord2f(0.0,0.0);
 glVertex3f(0.5,-0.5,-0.5);
 glEnd();

 glDisable(GL_TEXTURE_2D);
}

void reshape(int x, int y)
{
 if (y == 0 || x == 0) 
	return; 
 glMatrixMode(GL_PROJECTION);  
 glLoadIdentity();
 gluPerspective(45.0,(GLdouble)x/(GLdouble)y,0.5,10.0);
 glMatrixMode(GL_MODELVIEW);
 glViewport(0,0,x,y);
}

void Display(void)
{
 glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
 glLoadIdentity();
 glTranslatef (0.0, 0.0, -2.5);
 glRotatef(XRotated,1.0,0.0,0.0);	
 glRotatef(YRotated,0.0,1.0,0.0);	
 DrawCube();
 glFlush();  
 glutSwapBuffers();
}


void KeyDown(unsigned char key, int x, int y)
{
 switch (key) 
    {
    case 27:   //ESC
    PostQuitMessage(0);
    break;
    }
}

void Idle(void)
{
 XRotated += 1.0;
 YRotated += 5.0;
 Display();
}

int main(int argc, char **argv)
{
 glutInit(&argc, argv);
 glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
 glutInitWindowSize(300,300);
 glutCreateWindow("Multiples Texturas");
 glFrontFace(GL_CW);  
 glCullFace(GL_BACK);
 glEnable(GL_CULL_FACE);
 glEnable(GL_DEPTH_TEST);
 InitTextures();
 glutDisplayFunc(Display);
 glutReshapeFunc(reshape);
 glutKeyboardFunc(KeyDown);
 glutIdleFunc(Idle);
 glutMainLoop();
 return 0;             
}