OpenGL натянуть текстуру на 4х угольный полигон. Самый простой способ без лишнего кода

GLuint groundTex;

GLuint LoadTexture( const char * filename )
{
 
  GLuint texture;
 
  int width, height;
 
  unsigned char * data;
 
  FILE * file;
 
  file = fopen( filename, "rb" );
 
  if ( file == NULL ) return 0;
  //width = 1024;
  //height = 512;
  width = 550;
  height = 430;
  data = (unsigned char *)malloc( width * height * 3 );
  //int size = fseek(file,);
  fread( data, width * height * 3, 1, file );
  fclose( file );
 
 for(int i = 0; i < width * height ; ++i)
{
   int index = i*3;
   unsigned char B,R;
   B = data[index];
   R = data[index+2];
 
   data[index] = R;
   data[index+2] = B;
 
}
 
 
glGenTextures( 1, &texture );
glBindTexture( GL_TEXTURE_2D, texture );
glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE,GL_MODULATE );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST );
 
 
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,GL_LINEAR );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,GL_REPEAT );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,GL_REPEAT );
gluBuild2DMipmaps( GL_TEXTURE_2D, 3, width, height,GL_RGB, GL_UNSIGNED_BYTE, data );
free( data );
 
return texture;
}

groundTex=LoadTexture("1.bmp");//Загрузка текстуры

glEnable(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D, groundTex);
    glEnable(GL_POLYGON_OFFSET_FILL);
    glColor3f(1.0f, 1.0f, 1.0f);
    glBegin(GL_QUADS);
        glNormal3f( 0.0f, 1.0f, 0.0f);
 
        glTexCoord2f( 0.0f,  0.0f); 
        glVertex3f(-5.0f, -3.0f,-5.0f);
 
        glTexCoord2f( 0.0f, 1.0f); 
        glVertex3f(-5.0f, -3.0f, 5.0f);
 
        glTexCoord2f(1.0f, 1.0f); 
        glVertex3f( 5.0f, -3.0f, 5.0f);
 
        glTexCoord2f(1.0f,  0.0f); 
        glVertex3f( 5.0f, -3.0f,-5.0f);
 
    glEnd();
    glDisable(GL_POLYGON_OFFSET_FILL);
    glBindTexture(GL_TEXTURE_2D, 0);
    glDisable(GL_TEXTURE_2D);
    //Текстура

unsigned char* image1 = SOIL_load_image("./container.jpg", &width, &height, 0, SOIL_LOAD_RGB);