159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/* 259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Copyright (c) 2009-2010 jMonkeyEngine 359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * All rights reserved. 459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Redistribution and use in source and binary forms, with or without 659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * modification, are permitted provided that the following conditions are 759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * met: 859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Redistributions of source code must retain the above copyright 1059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * notice, this list of conditions and the following disclaimer. 1159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Redistributions in binary form must reproduce the above copyright 1359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * notice, this list of conditions and the following disclaimer in the 1459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * documentation and/or other materials provided with the distribution. 1559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Neither the name of 'jMonkeyEngine' nor the names of its contributors 1759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * may be used to endorse or promote products derived from this software 1859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * without specific prior written permission. 1959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 2059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 2459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 2759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 2859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 2959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 3259b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartapackage com.jme3.bullet.joints; 3359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3459b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport com.bulletphysics.dynamics.constraintsolver.Point2PointConstraint; 3559b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport com.jme3.bullet.objects.PhysicsRigidBody; 3659b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport com.jme3.bullet.util.Converter; 3759b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport com.jme3.export.InputCapsule; 3859b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport com.jme3.export.JmeExporter; 3959b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport com.jme3.export.JmeImporter; 4059b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport com.jme3.export.OutputCapsule; 4159b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport com.jme3.math.Vector3f; 4259b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport java.io.IOException; 4359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/** 4559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * <i>From bullet manual:</i><br> 4659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Point to point constraint, also known as ball socket joint limits the translation 4759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * so that the local pivot points of 2 rigidbodies match in worldspace. 4859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * A chain of rigidbodies can be connected using this constraint. 4959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @author normenhansen 5059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 5159b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartapublic class Point2PointJoint extends PhysicsJoint { 5259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 5359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public Point2PointJoint() { 5459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 5559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 5659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 5759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param pivotA local translation of the joint connection point in node A 5859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param pivotB local translation of the joint connection point in node B 5959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 6059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public Point2PointJoint(PhysicsRigidBody nodeA, PhysicsRigidBody nodeB, Vector3f pivotA, Vector3f pivotB) { 6159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta super(nodeA, nodeB, pivotA, pivotB); 6259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta createJoint(); 6359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 6459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 6559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public void setDamping(float value) { 6659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta ((Point2PointConstraint) constraint).setting.damping = value; 6759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 6859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 6959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public void setImpulseClamp(float value) { 7059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta ((Point2PointConstraint) constraint).setting.impulseClamp = value; 7159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 7259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 7359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public void setTau(float value) { 7459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta ((Point2PointConstraint) constraint).setting.tau = value; 7559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 7659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 7759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public float getDamping() { 7859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return ((Point2PointConstraint) constraint).setting.damping; 7959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 8059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 8159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public float getImpulseClamp() { 8259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return ((Point2PointConstraint) constraint).setting.impulseClamp; 8359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 8459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 8559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public float getTau() { 8659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return ((Point2PointConstraint) constraint).setting.tau; 8759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 8859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 8959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta @Override 9059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public void write(JmeExporter ex) throws IOException { 9159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta super.write(ex); 9259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta OutputCapsule cap = ex.getCapsule(this); 9359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta cap.write(getDamping(), "damping", 1.0f); 9459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta cap.write(getTau(), "tau", 0.3f); 9559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta cap.write(getImpulseClamp(), "impulseClamp", 0f); 9659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 9859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta @Override 9959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public void read(JmeImporter im) throws IOException { 10059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta super.read(im); 10159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta createJoint(); 10259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta InputCapsule cap=im.getCapsule(this); 10359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta setDamping(cap.readFloat("damping", 1.0f)); 10459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta setDamping(cap.readFloat("tau", 0.3f)); 10559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta setDamping(cap.readFloat("impulseClamp", 0f)); 10659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 10759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 10859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta protected void createJoint() { 10959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta constraint = new Point2PointConstraint(nodeA.getObjectId(), nodeB.getObjectId(), Converter.convert(pivotA), Converter.convert(pivotB)); 11059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 11159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta} 112