--- /dev/null
+package tim.prune.threedee;
+
+import java.awt.event.InputEvent;
+
+/*
+ * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistribution of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistribution in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * Neither the name of Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * This software is provided "AS IS," without a warranty of any
+ * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
+ * EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
+ * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
+ * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
+ * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
+ * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
+ * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
+ * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
+ * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ * You acknowledge that this software is not designed, licensed or
+ * intended for use in the design, construction, operation or
+ * maintenance of any nuclear facility.
+ *
+ * Copyright (c) 2021 ActivityWorkshop simplifications and renamings,
+ * and restriction to upright orientations.
+ */
+
+import java.awt.event.MouseEvent;
+import java.awt.AWTEvent;
+
+import javax.media.j3d.Transform3D;
+import javax.media.j3d.Canvas3D;
+
+import javax.vecmath.Vector3d;
+import javax.vecmath.Point3d;
+import javax.vecmath.Matrix3d;
+
+import com.sun.j3d.utils.behaviors.vp.ViewPlatformAWTBehavior;
+import com.sun.j3d.utils.universe.ViewingPlatform;
+
+
+/**
+ * Moves the View around a point of interest when the mouse is dragged with
+ * a mouse button pressed. Includes rotation, zoom, and translation
+ * actions. Zooming can also be obtained by using mouse wheel.
+ * <p>
+ * The rotate action rotates the ViewPlatform around the point of interest
+ * when the mouse is moved with the main mouse button pressed. The
+ * rotation is in the direction of the mouse movement, with a default
+ * rotation of 0.01 radians for each pixel of mouse movement.
+ * <p>
+ * The zoom action moves the ViewPlatform closer to or further from the
+ * point of interest when the mouse is moved with the middle mouse button
+ * pressed (or Alt-main mouse button on systems without a middle mouse button).
+ * The default zoom action is to translate the ViewPlatform 0.01 units for each
+ * pixel of mouse movement. Moving the mouse up moves the ViewPlatform closer,
+ * moving the mouse down moves the ViewPlatform further away.
+ * <p>
+ * The translate action translates the ViewPlatform when the mouse is moved
+ * with the right mouse button pressed. The translation is in the direction
+ * of the mouse movement, with a default translation of 0.01 units for each
+ * pixel of mouse movement.
+ * <p>
+ * The actions can be reversed using the <code>REVERSE_</code><i>ACTION</i>
+ * constructor flags. The default action moves the ViewPlatform around the
+ * objects in the scene. The <code>REVERSE_</code><i>ACTION</i> flags can
+ * make the objects in the scene appear to be moving in the direction
+ * of the mouse movement.
+ */
+public class UprightOrbiter extends ViewPlatformAWTBehavior
+{
+ private Transform3D _longitudeTransform = new Transform3D();
+ private Transform3D _latitudeTransform = new Transform3D();
+ private Transform3D _rotateTransform = new Transform3D();
+
+ // needed for integrateTransforms but don't want to new every time
+ private Transform3D _temp1 = new Transform3D();
+ private Transform3D _temp2 = new Transform3D();
+ private Transform3D _translation = new Transform3D();
+ private Vector3d _transVector = new Vector3d();
+ private Vector3d _distanceVector = new Vector3d();
+ private Vector3d _centerVector = new Vector3d();
+ private Vector3d _invertCenterVector = new Vector3d();
+
+ private double _deltaYaw = 0.0, _deltaPitch = 0.0;
+ private double _startDistanceFromCenter = 20.0;
+ private double _distanceFromCenter = 20.0;
+ private Point3d _rotationCenter = new Point3d();
+ private Matrix3d _rotMatrix = new Matrix3d();
+
+ private int _mouseX = 0, _mouseY = 0;
+
+ private double _xtrans = 0.0, _ytrans = 0.0, _ztrans = 0.0;
+
+ private static final double MIN_RADIUS = 0.0;
+
+ // the factor to be applied to wheel zooming so that it does not
+ // look much different with mouse movement zooming.
+ private static final float wheelZoomFactor = 50.0f;
+
+ private static final double NOMINAL_ZOOM_FACTOR = .01;
+ private static final double NOMINAL_ROT_FACTOR = .008;
+ private static final double NOMINAL_TRANS_FACTOR = .003;
+
+ private double _pitchAngle = 0.0;
+
+
+ /**
+ * Creates a new OrbitBehaviour
+ * @param inCanvas The Canvas3D to add the behaviour to
+ * @param inInitialPitch pitch angle in degrees
+ */
+ public UprightOrbiter(Canvas3D inCanvas, double inInitialPitch)
+ {
+ super(inCanvas, MOUSE_LISTENER | MOUSE_MOTION_LISTENER | MOUSE_WHEEL_LISTENER );
+ _pitchAngle = Math.toRadians(inInitialPitch);
+ }
+
+ protected synchronized void processAWTEvents( final AWTEvent[] events )
+ {
+ motion = false;
+ for(int i=0; i<events.length; i++)
+ if (events[i] instanceof MouseEvent)
+ processMouseEvent( (MouseEvent)events[i] );
+ }
+
+ protected void processMouseEvent( final MouseEvent evt )
+ {
+ if (evt.getID() == MouseEvent.MOUSE_PRESSED) {
+ _mouseX = evt.getX();
+ _mouseY = evt.getY();
+ motion = true;
+ }
+ else if (evt.getID() == MouseEvent.MOUSE_DRAGGED)
+ {
+ int xchange = evt.getX() - _mouseX;
+ int ychange = evt.getY() - _mouseY;
+ // rotate
+ if (isRotateEvent(evt))
+ {
+ _deltaYaw -= xchange * NOMINAL_ROT_FACTOR;
+ _deltaPitch -= ychange * NOMINAL_ROT_FACTOR;
+ }
+ // translate
+ else if (isTranslateEvent(evt))
+ {
+ _xtrans -= xchange * NOMINAL_TRANS_FACTOR;
+ _ytrans += ychange * NOMINAL_TRANS_FACTOR;
+ }
+ // zoom
+ else if (isZoomEvent(evt)) {
+ doZoomOperations( ychange );
+ }
+ _mouseX = evt.getX();
+ _mouseY = evt.getY();
+ motion = true;
+ }
+ else if (evt.getID() == MouseEvent.MOUSE_WHEEL )
+ {
+ if (isZoomEvent(evt))
+ {
+ // if zooming is done through mouse wheel, the number of wheel increments
+ // is multiplied by the wheelZoomFactor, to make zoom speed look natural
+ if ( evt instanceof java.awt.event.MouseWheelEvent)
+ {
+ int zoom = ((int)(((java.awt.event.MouseWheelEvent)evt).getWheelRotation()
+ * wheelZoomFactor));
+ doZoomOperations( zoom );
+ motion = true;
+ }
+ }
+ }
+ }
+
+ /*
+ * zoom but stop at MIN_RADIUS
+ */
+ private void doZoomOperations( int ychange )
+ {
+ if ((_distanceFromCenter - ychange * NOMINAL_ZOOM_FACTOR) > MIN_RADIUS) {
+ _distanceFromCenter -= ychange * NOMINAL_ZOOM_FACTOR;
+ }
+ else {
+ _distanceFromCenter = MIN_RADIUS;
+ }
+ }
+
+ /**
+ * Sets the ViewingPlatform for this behaviour. This method is
+ * called by the ViewingPlatform.
+ * If a sub-calls overrides this method, it must call
+ * super.setViewingPlatform(vp).
+ * NOTE: Applications should <i>not</i> call this method.
+ */
+ @Override
+ public void setViewingPlatform(ViewingPlatform vp)
+ {
+ super.setViewingPlatform( vp );
+
+ if (vp != null) {
+ resetView();
+ integrateTransforms();
+ }
+ }
+
+ /**
+ * Reset the orientation and distance of this behaviour to the current
+ * values in the ViewPlatform Transform Group
+ */
+ private void resetView()
+ {
+ Vector3d centerToView = new Vector3d();
+
+ targetTG.getTransform( targetTransform );
+
+ targetTransform.get( _rotMatrix, _transVector );
+ centerToView.sub( _transVector, _rotationCenter );
+ _distanceFromCenter = centerToView.length();
+ _startDistanceFromCenter = _distanceFromCenter;
+
+ targetTransform.get( _rotMatrix );
+ _rotateTransform.set( _rotMatrix );
+
+ // compute the initial x/y/z offset
+ _temp1.set(centerToView);
+ _rotateTransform.invert();
+ _rotateTransform.mul(_temp1);
+ _rotateTransform.get(centerToView);
+ _xtrans = centerToView.x;
+ _ytrans = centerToView.y;
+ _ztrans = centerToView.z;
+
+ // reset rotMatrix
+ _rotateTransform.set( _rotMatrix );
+ }
+
+ protected synchronized void integrateTransforms()
+ {
+ // Check if the transform has been changed by another behaviour
+ Transform3D currentXfm = new Transform3D();
+ targetTG.getTransform(currentXfm);
+ if (! targetTransform.equals(currentXfm))
+ resetView();
+
+ // Three-step rotation process, firstly undo the pitch and apply the delta yaw
+ _latitudeTransform.rotX(_pitchAngle);
+ _rotateTransform.mul(_rotateTransform, _latitudeTransform);
+ _longitudeTransform.rotY( _deltaYaw );
+ _rotateTransform.mul(_rotateTransform, _longitudeTransform);
+ // Now update pitch angle according to delta and apply
+ _pitchAngle = Math.min(Math.max(0.0, _pitchAngle - _deltaPitch), Math.PI/2.0);
+ _latitudeTransform.rotX(-_pitchAngle);
+ _rotateTransform.mul(_rotateTransform, _latitudeTransform);
+
+ _distanceVector.z = _distanceFromCenter - _startDistanceFromCenter;
+
+ _temp1.set(_distanceVector);
+ _temp1.mul(_rotateTransform, _temp1);
+
+ // want to look at rotationCenter
+ _transVector.x = _rotationCenter.x + _xtrans;
+ _transVector.y = _rotationCenter.y + _ytrans;
+ _transVector.z = _rotationCenter.z + _ztrans;
+
+ _translation.set(_transVector);
+ targetTransform.mul(_temp1, _translation);
+
+ // handle rotationCenter
+ _temp1.set(_centerVector);
+ _temp1.mul(targetTransform);
+
+ _invertCenterVector.x = -_centerVector.x;
+ _invertCenterVector.y = -_centerVector.y;
+ _invertCenterVector.z = -_centerVector.z;
+
+ _temp2.set(_invertCenterVector);
+ targetTransform.mul(_temp1, _temp2);
+
+ Vector3d finalTranslation = new Vector3d();
+ targetTransform.get(finalTranslation);
+
+ targetTG.setTransform(targetTransform);
+
+ // reset yaw and pitch deltas
+ _deltaYaw = 0.0;
+ _deltaPitch = 0.0;
+ }
+
+ private boolean isRotateEvent(MouseEvent evt)
+ {
+ final boolean isRightDrag = (evt.getModifiersEx() & InputEvent.BUTTON3_DOWN_MASK) > 0;
+ return !evt.isAltDown() && !isRightDrag;
+ }
+
+ private boolean isZoomEvent(MouseEvent evt)
+ {
+ if (evt instanceof java.awt.event.MouseWheelEvent) {
+ return true;
+ }
+ return evt.isAltDown() && !evt.isMetaDown();
+ }
+
+ private boolean isTranslateEvent(MouseEvent evt)
+ {
+ final boolean isRightDrag = (evt.getModifiersEx() & InputEvent.BUTTON3_DOWN_MASK) > 0;
+ return !evt.isAltDown() && isRightDrag;
+ }
+}
projects / GpsPrune.git / blobdiff