course/semester2/pprog/assignment1/graphics.c

   1 /**
   2  * @file graphics.c
   3  * @author Sam Moore (20503628) 2012 - adapted from template program provided by UWA
   4  * @pur
   5
   6 /*
   7  * Initialization of graphics
   8  */
   9 void Init(void) {
  10
  11         glClearColor(1.0,1.0,1.0,0.0);
  12         glColor3f(0.0f, 0.0f, 0.0f);
  13         glPointSize(POINT_SIZE);
  14         glMatrixMode(GL_PROJECTION);
  15         glLoadIdentity();
  16
  17         /*init lighting */
  18
  19         GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
  20         GLfloat mat_shininess[] = { 50.0 };
  21         GLfloat light_position[] = { 1.0, 1.0, 0.0, 0.0 };
  22         glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
  23         glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
  24         glLightfv(GL_LIGHT0, GL_POSITION, light_position);
  25
  26     glColorMaterial(GL_FRONT,GL_DIFFUSE);                // Set Color Capability
  27
  28         glEnable(GL_LIGHTING);
  29         glEnable(GL_LIGHT0);
  30         glEnable(GL_DEPTH_TEST);
  31
  32     glEnable(GL_COLOR_MATERIAL);                       // Enable color
  33
  34         double displayRatio = 1.0 * WIDTH / HEIGHT;
  35         windowWidth = WIDTH;
  36         windowHeight = HEIGHT;
  37         previousTime = clock();
  38         eyeTheta = 0;
  39     eyePhi = 0.5 * M_PI;
  40     eyeRho = RHO;
  41     upY = 1;
  42         look[0] = 0;
  43         look[1] = 0;
  44         look[2] = 0;
  45     gluPerspective(VIEW_ANGLE, displayRatio, WORLD_NEAR, WORLD_FAR);
  46 }
  47
  48 /*
  49  * This function redraws the screen after the positions of particles
  50  * have been updated
  51  */
  52 void Display(void) {
  53         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  54         glMatrixMode(GL_MODELVIEW);
  55     glLoadIdentity();
  56     gluLookAt(eyeRho * sin(eyePhi) * sin(eyeTheta), eyeRho * cos(eyePhi),
  57                     eyeRho * sin(eyePhi) * cos(eyeTheta),
  58                                         look[0], look[1], look[2], 0, upY, 0);
  59
  60         for (int i = 0; i < N; i++) {
  61         //glClearColor(1.0,1.0,1.0,0.0);
  62                 glColor3f(0.0f, body[i].mass/1e11*100, 0.0f);
  63         //glColor3f(1.0f, 0.0f, 0.0f);
  64                 glPushMatrix(); // to save the current matrix
  65                 glTranslated(SCALE*body[i].X, SCALE*body[i].Y, SCALE*body[i].Z);
  66                 glutSolidSphere (BALL_SIZE, 10, 10);
  67                 glPopMatrix(); // restore the previous matrix
  68         }
  69         glFlush();
  70 }