gogi.c

任意给定三维空间的点集

#ifdef  GOGI
    //qglColor( white );		      // Shorthand for glColor3f or glIndex
    



    GLfloat specular [] = { 1.0, 1.0, 1.0, 1.0 };
    GLfloat shininess [] = { 100.0 };
    
    // Set the clear color to black
    glClearColor(0.0, 0.0, 0.0, 0.0);
    
    // Set the shading model
    glShadeModel(GL_SMOOTH);

    // Set the polygon mode to fill
    //glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);

    // Enable depth testing for hidden line removal
    glEnable(GL_DEPTH_TEST);

    // Define material properties of specular color and degree of 
    // shininess.  Since this is only done once in this particular 
    // example, it applies to all objects.  Material properties can 
    // be set for individual objects, individual faces of the objects,
    // individual vertices of the faces, etc... 
    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);
    glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, shininess);

    
    // Set the GL_AMBIENT_AND_DIFFUSE color state variable to be the
    // one referred to by all following calls to glColor
    glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
    glEnable(GL_COLOR_MATERIAL);
    
    GLfloat light1_position[] = {0000,10000,20000,1};
    GLfloat light2_position[] = {-20000,0,0,1};
    GLfloat light3_position[] = {0,0,20000,1};
    GLfloat light4_position[] = {0,0,-20000,1};
   
    //glLightModeli(GL_LIGHT_MODEL_TWO_SIDE,GL_TRUE);

    glLightfv(GL_LIGHT0, GL_POSITION, light1_position);
    glLightfv(GL_LIGHT1, GL_POSITION, light2_position);
    glLightfv(GL_LIGHT2, GL_POSITION, light3_position);
    glLightfv(GL_LIGHT3, GL_POSITION, light4_position);

    //GLfloat lightx_position[] = {1000000,0,0,1};
    //GLfloat lightx_direction[] = {0,0,100};
    //glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, lightx_direction);
    //glLightfv(GL_LIGHT0, GL_POSITION, lightx_position);
    
    //double  param = 0.01;
    //GLfloat lmodel_ambient[] = { param, 2.0*param, 3.0*param, 1.0 };
    //glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);

    glEnable(GL_LIGHTING);

    glEnable(GL_LIGHT0);  
    glEnable(GL_LIGHT1);
    glEnable(GL_LIGHT2);  
    glEnable(GL_LIGHT3);
    
    glPolygonMode(GL_FRONT, GL_LINE);
    glPolygonMode(GL_BACK, GL_LINE);
    //glEnable(GL_DEPTH_TEST);
    //glDepthMask(GL_TRUE);
  
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_NORMALIZE);
    
    //glEnable(GL_CULL_FACE);

    //glEnable(GL_BLEND);
    //glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);

    glColorMaterial(GL_FRONT_AND_BACK,GL_DIFFUSE);
    //glClearColor(1, 1, 1, 0);   /* Background color = Black*/
    //glEnable(GL_CULL_FACE);
    glShadeModel( GL_SMOOTH );
    //glEnable(GL_DEPTH_TEST);
  
    float transparency = 1.0;

    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
    //glColor4f(1.0,1.0,1.0,transparency);
#endif  // GOGI