Graphics

//Projection
                        glMatrixMode(GL_PROJECTION);
			glLoadIdentity();
            

			GLdouble diam = m_allModels.getDiam();
			GLdouble left = m_allModels.getCenter()[0] - diam;
			GLdouble right = m_allModels.getCenter()[0] + diam;
			GLdouble bottom = m_allModels.getCenter()[1] - diam;
			GLdouble top = m_allModels.getCenter()[1] + diam;

            
			glFrustum(left,right,bottom,top,diam,diam*3.5);            
           
//Model
                         glMatrixMode(GL_MODELVIEW);
                         glLoadIdentity();
			 gluLookAt (0.0, 0.0,2*m_allModels.getDiam(),
			m_allModels.getCenter()[0],m_allModels.getCenter()[1],m_allModels.getCenter()[2],
			0.0, 1.0, 0.0);

//Lighting
			GLfloat light_position[] = {0.0, 0.0,0.0, 1.0 };
			GLfloat white_light[] = { 0.7, 0.3, 0.2, 1.0 };
			glEnable(GL_DEPTH_TEST);
			
			
			glEnable(GL_LIGHTING);
			glLightfv(GL_LIGHT1, GL_POSITION, light_position);
			glLightfv(GL_LIGHT1, GL_DIFFUSE, white_light);
			glEnable(GL_LIGHT1);
                        glShadeModel(GL_FLAT);
			
//Draw
			glEnable(GL_NORMALIZE);
                        glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
//render here
for(unsigned int modelIdx = 0;modelIdx < m_allModels.zise();++modelIdx)
			{
				model curModel = m_allModels.getModel(modelIdx);
				for(unsigned int modelSurfIdx = 0;modelSurfIdx <curModel.surfNum();
					++modelSurfIdx)
				{
					surface curSurf = curModel.getSurface(modelSurfIdx);
					glLineWidth(2);
					glBegin( GL_POLYGON );

					
					glNormal3f(curSurf.getN_x(),curSurf.getN_y(),curSurf.getN_z());
					for(unsigned int vertIdx = 0;vertIdx< curSurf.size();++vertIdx)
					{
						unsigned int curVertIdx = curSurf.getSurfVertices()[vertIdx];
						vertex curVert = curModel.getVertex(curVertIdx);
						glVertex3f((GLfloat)curVert.getX(),(GLfloat)curVert.getY(),(GLfloat)curVert.getZ());
					}	
					glEnd();

				}
			}