234 lines
8.4 KiB
Java
234 lines
8.4 KiB
Java
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/*
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File: FollowCelestialObject.java
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University of Applied Science Berne,HTA-Biel/Bienne,
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Computer Science Department.
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Diploma thesis J3D Solar System Simulator
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Originally written by Marcel Portner & Bernhard Hari (c) 2000
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CVS - Information :
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$Header: /var/cvsreps/projects/c450/2000/sss3d/source_diploma/sss3d/viewbranch/FollowCelestialObject.java,v 1.11 2000/12/13 13:43:41 portm Exp $
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$Author: portm $
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$Date: 2000/12/13 13:43:41 $
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$State: Exp $
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*/
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package sss3d.viewbranch;
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import sss3d.SolarSystemSimulator;
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import sss3d.utils.SSS3dConstants;
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import sss3d.utils.xmlparser.XMLConstants;
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import java.util.Enumeration;
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import javax.vecmath.*;
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import javax.media.j3d.*;
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/**
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* This class follow a celestial object.
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*
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* @author Marcel Portner & Bernhard Hari
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* @version $Revision: 1.11 $
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*/
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public class FollowCelestialObject extends Behavior {
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/**
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* The TransformGroup node to follow the celestial object.
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*/
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private TransformGroup new_tgView;
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/**
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* The reference to the main class.
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*/
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private SolarSystemSimulator sss3d;
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/**
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* Wake up event for each new frame.
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*/
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private WakeupOnElapsedFrames wakeUp = new WakeupOnElapsedFrames(0);
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/**
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* Constructor that allows to specify the desired target transform group.
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*
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* @param targetTG the target transform group
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* @param sss3d reference to the main class
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*/
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public FollowCelestialObject(TransformGroup targetTG, SolarSystemSimulator sss3d) {
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new_tgView = targetTG;
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this.sss3d = sss3d;
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}
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/**
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* Override Behavior's initialize method to setup wakeup criteria.
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*/
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public void initialize() {
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wakeupOn(wakeUp);
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}
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/**
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* Override Behavior's stimulus method to handle the event.
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* This method is called for each new frame and
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* operates on the specified transform group to follow an object with the camera.
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*
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* @param criteria an enumeration of triggered wakeup criteria for this behavior.
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*/
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public void processStimulus(Enumeration criteria) {
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if(criteria.hasMoreElements()) {
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Transform3D followObject = sss3d.lnkSceneSolarSystem.getCurrentPosition();
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boolean follow = !((Boolean)sss3d.getInitializationObject().getParameter(XMLConstants.CAMERAATORIGIN)).booleanValue();
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boolean compressed = ((Boolean)sss3d.getInitializationObject().getParameter(XMLConstants.COMPRESSED)).booleanValue();
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// Default camera position
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if(followObject == null) {
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// rotate about 270 degree at the X - axis
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Matrix3d rot = new Matrix3d();
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rot.rotX(Math.toRadians(270));
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Vector3d trans;
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if(compressed) {
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trans = new Vector3d(0.0, 70.0, 0.0);
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} else {
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trans = new Vector3d(0.0, 1000.0, 0.0);
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}
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followObject = new Transform3D(rot, trans, 1.0);
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} else if(follow) {
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// Give an offset.
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Vector3d offset = new Vector3d();
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int camera = ((Integer)sss3d.getInitializationObject().getParameter(XMLConstants.CAMERA)).intValue();
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switch(camera) {
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case SSS3dConstants.CAMERA_SUN :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 11.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 500.0));
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}
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followObject.set(offset);
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break;
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case SSS3dConstants.CAMERA_MERCURY :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 2.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 5.0));
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}
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followObject.set(offset);
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break;
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case SSS3dConstants.CAMERA_VENUS :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 2.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 9.0));
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}
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followObject.set(offset);
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break;
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case SSS3dConstants.CAMERA_EARTH :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 2.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 10.0));
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}
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followObject.set(offset);
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break;
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case SSS3dConstants.CAMERA_MARS :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 2.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 9.0));
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}
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followObject.set(offset);
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break;
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case SSS3dConstants.CAMERA_JUPITER :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 8.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 40.0));
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}
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followObject.set(offset);
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break;
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case SSS3dConstants.CAMERA_SATURN :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 9.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 45.0));
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}
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followObject.set(offset);
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break;
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case SSS3dConstants.CAMERA_URANUS :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 2.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 25.0));
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}
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followObject.set(offset);
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break;
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case SSS3dConstants.CAMERA_NEPTUNE :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 2.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 25.0));
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}
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followObject.set(offset);
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break;
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case SSS3dConstants.CAMERA_PLUTO :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 2.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 5.0));
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}
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followObject.set(offset);
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break;
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case SSS3dConstants.CAMERA_MOON :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 2.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 5.0));
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}
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followObject.set(offset);
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break;
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case SSS3dConstants.CAMERA_SPACESHUTTLE :
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Matrix3d m3dRot = new Matrix3d();
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Vector3d v3dTemp = new Vector3d();
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followObject.get(m3dRot);
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followObject.get(offset);
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if(compressed) {
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m3dRot.transform(new Vector3d(0.0, 0.02, 0.1), v3dTemp);
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} else {
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m3dRot.transform(new Vector3d(0.0, 0.2, 1.0), v3dTemp);
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}
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offset.add(v3dTemp);
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followObject.setTranslation(offset);
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break;
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default :
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followObject.get(offset);
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if(compressed) {
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offset.add(new Vector3d(0.0, 0.0, 2.0));
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} else {
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offset.add(new Vector3d(0.0, 0.0, 5.0));
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}
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followObject.set(offset);
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break;
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}
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}
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new_tgView.setTransform(followObject);
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}
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// Set wakeup criteria for next time.
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wakeupOn(wakeUp);
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}
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}
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