512 lines
18 KiB
Java
512 lines
18 KiB
Java
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/*
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File: SceneMoon.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/contentbranch/moons/SceneMoon.java,v 1.11 2000/12/15 02:53:18 portm Exp $
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$Author: portm $
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$Date: 2000/12/15 02:53:18 $
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$State: Exp $
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*/
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package sss3d.contentbranch.moons;
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import sss3d.contentbranch.*;
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import sss3d.utils.SSS3dConstants;
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import sss3d.utils.observer.*;
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import sss3d.contentbranch.orbit.*;
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import sss3d.calculations.constants.AstronomicalConstants;
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import sss3d.utils.xmlparser.XMLConstants;
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import javax.media.j3d.*;
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import javax.vecmath.*;
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import com.sun.j3d.utils.behaviors.interpolators.*;
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import java.util.Date;
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import java.awt.Color;
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/**
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* This class describe the scene of a moon.
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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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* @see Moon
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*/
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public class SceneMoon implements SceneCelestialObjects, PositionObserver, InfoObserver {
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private RotPosScaleTCBSplinePathInterpolator spline;
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private RotPosScaleTCBSplinePathInterpolator parentSpline;
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private RotationInterpolator rotator;
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private Alpha rotationAlpha;
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private Alpha animAlpha;
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private Alpha parentAnimAlpha;
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private long alphaTime = 0;
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private Date date;
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private BranchGroup removableCoordBG;
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private BranchGroup removableOrbitBG;
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private TransformGroup trGrRotAndLeafs;
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private TransformGroup trGrOrbit;
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private TransformGroup trGrTendSpline;
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private TransformGroup trGrParentSpline;
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private ColorOrbit colorOrbit;
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private Moon moon;
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private ObjectsPositions objPos;
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private ObjectsInformation objInfo;
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private InitializationObject iniObject;
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private CelestialObjectInfo parentObject;
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/**
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* Initializes a new ScenePlanet.
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*
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* @param moon a object reference of a given moon.
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* @param objPos a reference to the concrete subject of
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* the observer pattern positions
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* @param objInfo a reference to the concrete subject of
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* the observer pattern information
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*/
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public SceneMoon(Moon moon, ObjectsPositions objPos,
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ObjectsInformation objInfo ) {
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this.moon = moon;
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this.objPos = objPos;
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this.objPos.attach(this);
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this.objInfo = objInfo;
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this.objInfo.attach(this);
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iniObject = objInfo.getInitializationObject();
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parentObject = objInfo.getInfo(moon.getParentName());
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}
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/**
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* Removes this object from the position observer list.
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*/
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public void destroy() {
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objPos.detach(this);
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objInfo.detach(this);
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moon = null;
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}
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/**
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* Updates the position state of the object.<br>
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*
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* @param orbitPos a reference to the list containing all position observer
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*/
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public void update(OrbitPositions orbitPos) {
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}
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/**
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* Updates the information state of the object.<br>
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*
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* @param id identification of the object that has to be updated
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* @param parameter the parameter that has been changed
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*/
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public void update( String id, int parameter ) {
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if ( id.equals( moon.getId() ) ||
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id.equals("all") ) {
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IniData data = (IniData)objInfo.getParameter( XMLConstants.MOON, moon.getId() );
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switch ( parameter ) {
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case XMLConstants.VISIBLE :
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// implemented inside SceneSolarSystem
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break;
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case XMLConstants.COORDINATESYSTEM :
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if ( data.hasCoordinateSystem() ) {
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addCoord();
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} else {
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removeCoord();
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}
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break;
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case XMLConstants.ORBIT :
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if ( data.hasOrbit() ) {
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addOrbit();
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} else {
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removeOrbit();
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}
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break;
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case XMLConstants.COLORORBIT :
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setOrbitColor( data.getColorOrbit());
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break;
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case XMLConstants.ANIMATIONSPEED :
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setAnimSpeed();
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break;
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default : break;
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}
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}
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}
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/**
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* Returns the ID of the current moon.
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*
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* @return the ID to idendification the moon.
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*/
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public String getId() {
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return moon.getId();
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}
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/**
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* Returns a CelestialObjectInfo of the current moon.
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* This object has all specific information of the current moon.
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*
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* @return a CelestialObjectInfo of the current moon.
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*/
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public CelestialObjectInfo getInfo() {
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return moon.getInfo();
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}
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/**
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* This method handle the animation and rotation of the celestial objects.
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*
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* @param animate if true, start animation; if false stop animation.
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* @param rotate if true, start rotation; if false stop rotation.
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*/
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public void setAnimation(boolean animate, boolean rotate) {
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date = new Date();
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if(animate) {
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/*
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Set the stop time for the animation and rotation.
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Without this trick, the celestial objects are jumping around.
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Because when the animation is stop, the objects goes on
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in the background.
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*/
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alphaTime = date.getTime() - alphaTime;
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rotationAlpha.setStartTime(alphaTime);
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animAlpha.setStartTime(alphaTime);
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parentAnimAlpha.setStartTime(alphaTime);
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} else {
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// save the stop time for the animation and rotation.
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alphaTime = animAlpha.getStartTime();
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alphaTime = date.getTime() - alphaTime;
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}
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// set the animation and rotation to stop or go.
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spline.setEnable(animate);
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parentSpline.setEnable(animate);
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rotator.setEnable(rotate);
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}
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/**
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* Set the animation speed for the moon.
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*/
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public void setAnimSpeed() {
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date = new Date();
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AnimationSpeed animationSpeed = (AnimationSpeed)objInfo.getInitializationObject().getParameter(XMLConstants.ANIMATIONSPEED);
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int factor = 0;
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switch(animationSpeed.getType()) {
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case AnimationSpeed.DAYS_PER_SECOND:
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factor = 1;
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break;
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case AnimationSpeed.HOURS_PER_SECOND:
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factor = 24;
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break;
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case AnimationSpeed.MINUTES_PER_SECOND:
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factor = 24 * 60;
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break;
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default:
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}
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// moon rotation
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int animSpeed = animationSpeed.getValue();
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long duration = (long)(moon.getRotOwnAxis() * factor / animSpeed);
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long increasing = rotationAlpha.getIncreasingAlphaDuration();
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// delta t = t1*(1-T2/T1)
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long diff = (long)((date.getTime() - rotationAlpha.getStartTime()) *
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(1.0f - (float)duration / (float)increasing));
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rotationAlpha.setIncreasingAlphaDuration(duration);
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rotationAlpha.setStartTime(rotationAlpha.getStartTime() + diff);
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// moon movement
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duration = (long)(moon.getRotOrbit() * factor / animSpeed);
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increasing = animAlpha.getIncreasingAlphaDuration();
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// delta t = t1*(1-T2/T1)
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diff = (long)((date.getTime() - animAlpha.getStartTime()) *
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(1.0f - (float)duration / (float)increasing));
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animAlpha.setIncreasingAlphaDuration(duration);
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animAlpha.setStartTime(animAlpha.getStartTime() + diff);
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// parent movement
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duration = (long)(parentObject.getOrbitPeriod() * 1000 * AstronomicalConstants.DAYS *
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factor / animSpeed);
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increasing = parentAnimAlpha.getIncreasingAlphaDuration();
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// delta t = t1*(1-T2/T1)
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diff = (long)((date.getTime() - parentAnimAlpha.getStartTime()) *
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(1.0f - (float)duration / (float)increasing));
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parentAnimAlpha.setIncreasingAlphaDuration(duration);
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parentAnimAlpha.setStartTime(parentAnimAlpha.getStartTime() + diff);
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}
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/**
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* Add the coordinate system to this scenegraph.
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*/
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public void addCoord() {
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trGrRotAndLeafs.addChild(removableCoordBG);
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}
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/**
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* Remove the coordinate system from this scenegraph.
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*/
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public void removeCoord() {
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removableCoordBG.detach();
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}
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/**
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* Add the color orbit to this scenegraph.
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*/
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public void addOrbit() {
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trGrOrbit.addChild(removableOrbitBG);
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}
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/**
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* Remove the color orbit from this scenegraph.
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*/
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public void removeOrbit() {
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removableOrbitBG.detach();
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}
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/**
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* Set a new orbit color.
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*
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* @param orbitColor the new color of the orbit
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*/
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public void setOrbitColor(Color orbitColor) {
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colorOrbit.setColor(orbitColor);
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}
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/**
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* Get the current position of the moon.
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*
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* @return a Transform3D with the current position.
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*/
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public Transform3D getCurrentPosition() {
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Transform3D transVec = new Transform3D();
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Transform3D transVecParent = new Transform3D();
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Transform3D transRot = new Transform3D();
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trGrTendSpline.getTransform(transVec);
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trGrRotAndLeafs.getTransform(transRot);
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trGrParentSpline.getTransform(transVecParent);
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Vector3d vec = new Vector3d();
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Vector3d vecParent = new Vector3d();
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transVec.get(vec);
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transVecParent.get(vecParent);
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vec.add(vecParent);
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transRot.setTranslation(vec);
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return transRot;
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}
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/**
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* Returns the BranchGroup of the created moon scene.
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* It has a moon as leaf, make a rotation to the own axis and
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* make with a TCB-spline function a rotation around the parent planet.
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*
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* @return the BranchGroup of the given moon.
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*/
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public BranchGroup createSceneGraph() {
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// A BoundingSphere instance as general bounding region.
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BoundingSphere boundsGen = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
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SSS3dConstants.BOUNDRADIUS);
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// Create the first TransformGroup node trGrRotAndLeafs for the moon,
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// the coordinate system and the rotation
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trGrRotAndLeafs = new TransformGroup();
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// With the ALLOW_TRANSFORM_READ and ALLOW_TRANSFORM_WRITE
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// capabilities, we allow the modification of the TransformGroup's
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// code by the Behavior's code at run time.
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trGrRotAndLeafs.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
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trGrRotAndLeafs.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
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trGrRotAndLeafs.setCapability(Group.ALLOW_CHILDREN_READ);
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trGrRotAndLeafs.setCapability(Group.ALLOW_CHILDREN_WRITE);
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trGrRotAndLeafs.setCapability(Group.ALLOW_CHILDREN_EXTEND);
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// Attach the leaf node "moon" to the TransformGroup trGrRotAndLeafs.
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trGrRotAndLeafs.addChild(moon);
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removableCoordBG = new BranchGroup();
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// Create and attach a coordinate system to the TransformGroup node
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// trGrRotAndLeafs, that is to the moon.
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removableCoordBG.addChild(new CoordinateSystem(1.2f));
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// Allow to detach the Coordinate System
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removableCoordBG.setCapability(BranchGroup.ALLOW_DETACH);
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// Set the picking of the CoordinateSystem BranchGroup to false.
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removableCoordBG.setPickable(false);
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trGrRotAndLeafs.addChild(removableCoordBG);
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// Prepare the RotationInterpolator (Behavior) for the
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// moon's rotation about its own axis.
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Transform3D tr3Drot = new Transform3D();
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float startRot, endRot;
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if(moon.getRotOwnAxis() > 0) {
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// Create the alpha(t) function. Positiv rotation!
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rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0,
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/*moon.getRotOwnAxis()*/Long.MAX_VALUE, 0, 0, 0, 0, 0);
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startRot = 0.0f;
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endRot = (float)(2.0 * Math.PI);
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} else {
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// Create the alpha(t) function. Negativ rotation!
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rotationAlpha = new Alpha(-1, Alpha.DECREASING_ENABLE, 0, 0, 0, 0, 0,
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/*Math.abs(moon.getRotOwnAxis())*/Long.MAX_VALUE, 0, 0);
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startRot = (float)(2.0 * Math.PI);
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endRot = 0.0f;
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}
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// Create the moon's rotation about its own axis.
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rotator = new RotationInterpolator(rotationAlpha,
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trGrRotAndLeafs, tr3Drot,
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startRot, endRot);
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rotator.setSchedulingBounds(boundsGen);
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trGrRotAndLeafs.addChild(rotator);
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// Create the second TransformGroup node trGrTendSpline for the moon's
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// rotation around the parent planet and the tend.
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trGrTendSpline = new TransformGroup();
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// With the ALLOW_TRANSFORM_READ and ALLOW_TRANSFORM_WRITE
|
||
|
|
// capabilities, we allow the modification of the TransformGroup's
|
||
|
|
// code by the Behavior's code at run time.
|
||
|
|
trGrTendSpline.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
|
||
|
|
trGrTendSpline.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
|
||
|
|
|
||
|
|
// Attach trGrRotAndLeafs node to the trGrTendSpline node.
|
||
|
|
trGrTendSpline.addChild(trGrRotAndLeafs);
|
||
|
|
|
||
|
|
Transform3D yAxis = new Transform3D();
|
||
|
|
|
||
|
|
// Create the alpha(t) function.
|
||
|
|
animAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0,
|
||
|
|
/*moon.getRotOrbit()*/Long.MAX_VALUE, 0, 0, 0, 0, 0);
|
||
|
|
|
||
|
|
// the animation Alpha value of the parent object
|
||
|
|
long duration = (long)(parentObject.getOrbitPeriod() * 1000 * AstronomicalConstants.DAYS);
|
||
|
|
// Create the alpha(t) function.
|
||
|
|
parentAnimAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0,
|
||
|
|
/*duration*/Long.MAX_VALUE, 0, 0, 0, 0, 0);
|
||
|
|
|
||
|
|
// rotate the moon to his true tend
|
||
|
|
Matrix4d mat = new Matrix4d();
|
||
|
|
mat.rotX(Math.toRadians(moon.getDegree()));
|
||
|
|
Quat4f r = new Quat4f();
|
||
|
|
r.set(mat);
|
||
|
|
// set scale of the moon
|
||
|
|
float scale;
|
||
|
|
boolean compressed = ((Boolean)iniObject.getParameter(XMLConstants.COMPRESSED)).booleanValue();
|
||
|
|
if(compressed) {
|
||
|
|
scale = moon.getLogRadius();
|
||
|
|
} else {
|
||
|
|
scale = moon.getRadius();
|
||
|
|
}
|
||
|
|
Point3f s = new Point3f(scale, scale, scale);
|
||
|
|
|
||
|
|
Double time = (Double)iniObject.getParameter(XMLConstants.JDAY);
|
||
|
|
// take the positions of the moon
|
||
|
|
Point3f[] pos = objPos.getPositions(getInfo(), time.doubleValue(), compressed);
|
||
|
|
int pointNrs = pos.length;
|
||
|
|
float stepLength = 1 / (float)pointNrs;
|
||
|
|
float stepPos = 0.0f;
|
||
|
|
// save the positions in the TCBKeyFrame
|
||
|
|
TCBKeyFrame[] keyFrames = new TCBKeyFrame[pointNrs+1];
|
||
|
|
for(int i = 0; i < pointNrs; i++) {
|
||
|
|
keyFrames[i] = new TCBKeyFrame(stepPos, 0, pos[i], r, s, 0.0f, 0.0f, 0.0f);
|
||
|
|
stepPos += stepLength;
|
||
|
|
}
|
||
|
|
keyFrames[pointNrs] = new TCBKeyFrame(1.0f, 0, pos[0], r, s, 0.0f, 0.0f, 0.0f);
|
||
|
|
|
||
|
|
// make a spline courve of the position points
|
||
|
|
spline = new RotPosScaleTCBSplinePathInterpolator(animAlpha,
|
||
|
|
trGrTendSpline,
|
||
|
|
yAxis,
|
||
|
|
keyFrames);
|
||
|
|
spline.setSchedulingBounds(boundsGen);
|
||
|
|
trGrTendSpline.addChild(spline);
|
||
|
|
|
||
|
|
// Create the TransformGroup node trGrOrbit for the moon orbit.
|
||
|
|
trGrOrbit = new TransformGroup();
|
||
|
|
|
||
|
|
trGrOrbit.addChild(trGrTendSpline);
|
||
|
|
|
||
|
|
trGrOrbit.setCapability(Group.ALLOW_CHILDREN_READ);
|
||
|
|
trGrOrbit.setCapability(Group.ALLOW_CHILDREN_WRITE);
|
||
|
|
trGrOrbit.setCapability(Group.ALLOW_CHILDREN_EXTEND);
|
||
|
|
|
||
|
|
removableOrbitBG = new BranchGroup();
|
||
|
|
|
||
|
|
colorOrbit = new ColorLineOrbit(Color.red);
|
||
|
|
|
||
|
|
colorOrbit.setPositions(pos);
|
||
|
|
|
||
|
|
// Attach the leaf node "orbit" to the BranchGroup removableOrbitBG.
|
||
|
|
removableOrbitBG.addChild(colorOrbit);
|
||
|
|
|
||
|
|
removableOrbitBG.setCapability(BranchGroup.ALLOW_DETACH);
|
||
|
|
|
||
|
|
// Set the picking of the ColorOrbit BranchGroup to false.
|
||
|
|
removableOrbitBG.setPickable(false);
|
||
|
|
|
||
|
|
trGrOrbit.addChild(removableOrbitBG);
|
||
|
|
|
||
|
|
trGrParentSpline = new TransformGroup();
|
||
|
|
|
||
|
|
// With the ALLOW_TRANSFORM_READ and ALLOW_TRANSFORM_WRITE
|
||
|
|
// capabilities, we allow the modification of the TransformGroup's
|
||
|
|
// code by the Behavior's code at run time.
|
||
|
|
trGrParentSpline.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
|
||
|
|
trGrParentSpline.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
|
||
|
|
|
||
|
|
// Attach trGrRotAndLeafs node to the trGrTendSpline node.
|
||
|
|
trGrParentSpline.addChild(trGrOrbit);
|
||
|
|
|
||
|
|
r = null;
|
||
|
|
s = null;
|
||
|
|
r = new Quat4f();
|
||
|
|
s = new Point3f(1.0f, 1.0f, 1.0f);
|
||
|
|
|
||
|
|
// take the positions of the parent planet
|
||
|
|
Point3f[] parentPos = objPos.getPositions(parentObject, time.doubleValue(), compressed);
|
||
|
|
pointNrs = parentPos.length;
|
||
|
|
stepLength = 1 / (float)pointNrs;
|
||
|
|
stepPos = 0.0f;
|
||
|
|
// save the positions in the TCBKeyFrame
|
||
|
|
TCBKeyFrame[] parentKeyFrames = new TCBKeyFrame[pointNrs+1];
|
||
|
|
for(int i = 0; i < pointNrs; i++) {
|
||
|
|
parentKeyFrames[i] = new TCBKeyFrame(stepPos, 0, parentPos[i], r, s, 0.0f, 0.0f, 0.0f);
|
||
|
|
stepPos += stepLength;
|
||
|
|
}
|
||
|
|
parentKeyFrames[pointNrs] = new TCBKeyFrame(1.0f, 0, parentPos[0], r, s, 0.0f, 0.0f, 0.0f);
|
||
|
|
|
||
|
|
// make a spline courve of the position points
|
||
|
|
parentSpline = new RotPosScaleTCBSplinePathInterpolator(parentAnimAlpha,
|
||
|
|
trGrParentSpline,
|
||
|
|
yAxis,
|
||
|
|
parentKeyFrames);
|
||
|
|
|
||
|
|
parentSpline.setSchedulingBounds(boundsGen);
|
||
|
|
trGrParentSpline.addChild(parentSpline);
|
||
|
|
|
||
|
|
BranchGroup brGrAll = new BranchGroup();
|
||
|
|
brGrAll.addChild(trGrParentSpline);
|
||
|
|
|
||
|
|
brGrAll.setCapability(BranchGroup.ALLOW_DETACH);
|
||
|
|
|
||
|
|
// Return the final version of the BranchGroup node brGrAll.
|
||
|
|
return brGrAll;
|
||
|
|
}
|
||
|
|
}
|