//File VIAGGIO.JAVA

import vrml.*;
import vrml.node.*;
import vrml.field.*;

public class viaggio extends Script {

  int i, j, k, l;
  float[] coordX;
  float[] coordY;
  float[] coordZ;
  float[] angolo;
  float[] translation;
  float[] rotation;
  boolean viaggio = false;
  boolean centro = true;
  SFVec3f ViaggioTranslation;
  SFRotation ViaggioRotation;
  SFBool ViaggioViewBind;

  public void initialize () {
    coordX = new float[320];
    coordY = new float[320];
    coordZ = new float[320];
    angolo = new float[320];
    translation = new float[3];
    rotation = new float[4];
    ViaggioTranslation = (SFVec3f) getEventOut("ViaggioTranslation");
    ViaggioRotation = (SFRotation) getEventOut("ViaggioRotation");
    ViaggioViewBind = (SFBool) getEventOut("ViaggioViewBind");

    i = 0;
    rotation[0] = 0.0f;
    rotation[1] = 1.0f;
    rotation[2] = 0.0f;
    rotation[3] = 0.0f;
    ViaggioRotation.setValue(rotation);
    l = 0;
    for (j = 22000; j >= 2000; j -= 4000) {
      for (k = 0; k < 64; k++) {
        coordX[l] = (float) (-j * Math.sin(k * 0.098125f));
        coordY[l] = 1000.0f;
        coordZ[l] = (float) (j * Math.cos(k * 0.098125f));
        angolo[l] = (0.3925f - (k * 0.098125f));
        l++;
      }
    }
  }

  public void processEvent(Event e) {
    String nomeEvento = e.getName();
    if (nomeEvento.equals("Move")) {
      Move();
    }
    if (nomeEvento.equals("StartStop")) {
      StartStop();
    }
  }

  public void Move()
  {
    translation[0] = coordX[i];
    translation[1] = coordY[i];
    translation[2] = coordZ[i];
    ViaggioTranslation.setValue(translation);        
    rotation[3] = angolo[i];
    ViaggioRotation.setValue(rotation);
    if (centro == true) {
      i++;
      if (i == 320) {
        centro = false;
        i = 319;
      }
    }
    else {
      i--;
      if (i == -1) {
        centro = true;
        i = 0;
      }
    }
  }

  public void StartStop()
  {
    if (viaggio == true) {
      viaggio = false;
      ViaggioViewBind.setValue(false);
    }
    else {
      viaggio = true;
      ViaggioViewBind.setValue(true);
    }
  }

  public void shutdown() {}

}