/* File: sv4.c
*/

#include <stdio.h>
#include <unistd.h>
#include <cave_ogl.h>
#include <GL/glu.h>
#include <vssClient.h>

static GLUquadricObj *g_sphereObj;
static int g_ndraw = 0;
int hAud;

void oglexDraw(void){
  float magenta[4] = { 1.0, 0.0, 1.0, 1.0 };
  float cyan[4] = { 0.0, 1.0, 1.0, 1.0 };
  double alpha;
  float x, y, z;

  alpha = 2.0*M_PI*((float)g_ndraw/(float)60);
  x = 3.0*cos(alpha);
  y = 5.0;
  z = 3.0*sin(alpha)-4.0;
  AUDupdateFloats(hAud, "ModifyFm", 4, 0.2, 100.0, z*2 + 16, .402);
  glClearColor(0., 0., 0., 0.);
  glClear(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT);
  glPushMatrix();
  glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, cyan);
  glTranslatef(0.0, 5.0, -4.0);
  gluSphere(g_sphereObj, 1.0, 15, 15);
  glPopMatrix();
  glPushMatrix();
  glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, magenta);
  glTranslatef(x, y, z);
  gluSphere(g_sphereObj, 1.0, 15, 15);
  glPopMatrix();
  g_ndraw++;
}

void oglexInit(void) {
  glEnable(GL_LIGHT0);
  glEnable(GL_LIGHTING);
  g_sphereObj = gluNewQuadric();
}


main(int argc, char **argv) {
  char audfile[100];
  if (argc != 2) {
    fprintf(stderr, "Usage: %s audfile\n", *argv);
    exit(44);
  }

  strcpy(audfile, argv[1]);

  if (!BeginSoundServer())	{
    printf("Error: couldn't find a running copy of VSS.\n");
    exit (44);
  }

  if ((hAud = AUDinit(audfile)) < 0) {
    EndSoundServer();
    exit(44);
  }

  /* Initialize the CAVE */
  CAVEConfigure(&argc,argv,NULL);
  CAVEInit();

  /* Give the library a pointer to the GL initialization function */
  CAVEInitApplication(oglexInit, NULL);

  /* Give the library a pointer to the drawing function */
  CAVEDisplay(oglexDraw, NULL);

  /* Wait for the escape key to be hit */
  while (!CAVEgetbutton(CAVE_ESCKEY))
    sginap(10);

  AUDterminate(hAud);
  EndSoundServer();

  /* Clean up & exit */
  CAVEExit();
}