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Serialization library for jbox2d
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/*******************************************************************************
* Copyright (c) 2013, Daniel Murphy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
package org.jbox2d.serialization.pb;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import org.box2d.proto.Box2D.PbBody;
import org.box2d.proto.Box2D.PbFixture;
import org.box2d.proto.Box2D.PbJoint;
import org.box2d.proto.Box2D.PbJointType;
import org.box2d.proto.Box2D.PbShape;
import org.box2d.proto.Box2D.PbVec2;
import org.box2d.proto.Box2D.PbWorld;
import org.jbox2d.collision.shapes.ChainShape;
import org.jbox2d.collision.shapes.CircleShape;
import org.jbox2d.collision.shapes.EdgeShape;
import org.jbox2d.collision.shapes.PolygonShape;
import org.jbox2d.collision.shapes.Shape;
import org.jbox2d.common.Vec2;
import org.jbox2d.dynamics.Body;
import org.jbox2d.dynamics.BodyDef;
import org.jbox2d.dynamics.BodyType;
import org.jbox2d.dynamics.Fixture;
import org.jbox2d.dynamics.FixtureDef;
import org.jbox2d.dynamics.World;
import org.jbox2d.dynamics.joints.ConstantVolumeJointDef;
import org.jbox2d.dynamics.joints.DistanceJoint;
import org.jbox2d.dynamics.joints.DistanceJointDef;
import org.jbox2d.dynamics.joints.FrictionJointDef;
import org.jbox2d.dynamics.joints.GearJointDef;
import org.jbox2d.dynamics.joints.Joint;
import org.jbox2d.dynamics.joints.JointDef;
import org.jbox2d.dynamics.joints.MouseJointDef;
import org.jbox2d.dynamics.joints.PrismaticJointDef;
import org.jbox2d.dynamics.joints.PulleyJointDef;
import org.jbox2d.dynamics.joints.RevoluteJointDef;
import org.jbox2d.dynamics.joints.RopeJointDef;
import org.jbox2d.dynamics.joints.WeldJointDef;
import org.jbox2d.dynamics.joints.WheelJointDef;
import org.jbox2d.serialization.JbDeserializer;
import org.jbox2d.serialization.UnsupportedListener;
import org.jbox2d.serialization.UnsupportedObjectException;
import org.jbox2d.serialization.UnsupportedObjectException.Type;
public class PbDeserializer implements JbDeserializer {
private ObjectListener listener = null;
private UnsupportedListener ulistener = null;
public PbDeserializer() {}
public PbDeserializer(UnsupportedListener argListener) {
ulistener = argListener;
}
public PbDeserializer(ObjectListener argObjectListner) {
listener = argObjectListner;
}
public PbDeserializer(UnsupportedListener argListener, ObjectListener argObjectListner) {
ulistener = argListener;
listener = argObjectListner;
}
@Override
public void setObjectListener(ObjectListener argListener) {
listener = argListener;
}
@Override
public void setUnsupportedListener(UnsupportedListener argListener) {
ulistener = argListener;
}
private boolean isIndependentJoint(PbJointType argType) {
return argType != PbJointType.GEAR && argType != PbJointType.CONSTANT_VOLUME;
}
@Override
public World deserializeWorld(InputStream argInput) throws IOException {
PbWorld world = PbWorld.parseFrom(argInput);
return deserializeWorld(world);
}
public World deserializeWorld(PbWorld pbWorld) {
World world = new World(pbToVec(pbWorld.getGravity()));
world.setAutoClearForces(pbWorld.getAutoClearForces());
world.setContinuousPhysics(pbWorld.getContinuousPhysics());
world.setWarmStarting(pbWorld.getWarmStarting());
world.setSubStepping(pbWorld.getSubStepping());
HashMap bodyMap = new HashMap();
HashMap jointMap = new HashMap();
for (int i = 0; i < pbWorld.getBodiesCount(); i++) {
PbBody pbBody = pbWorld.getBodies(i);
Body body = deserializeBody(world, pbBody);
bodyMap.put(i, body);
}
// first pass, indep joints
int cnt = 0;
for (int i = 0; i < pbWorld.getJointsCount(); i++) {
PbJoint pbJoint = pbWorld.getJoints(i);
if (isIndependentJoint(pbJoint.getType())) {
Joint joint = deserializeJoint(world, pbJoint, bodyMap, jointMap);
jointMap.put(cnt, joint);
cnt++;
}
}
// second pass, dep joints
for (int i = 0; i < pbWorld.getJointsCount(); i++) {
PbJoint pbJoint = pbWorld.getJoints(i);
if (!isIndependentJoint(pbJoint.getType())) {
Joint joint = deserializeJoint(world, pbJoint, bodyMap, jointMap);
jointMap.put(cnt, joint);
cnt++;
}
}
if (listener != null && pbWorld.hasTag()) {
listener.processWorld(world, pbWorld.getTag());
}
return world;
}
@Override
public Body deserializeBody(World argWorld, InputStream argInput) throws IOException {
PbBody body = PbBody.parseFrom(argInput);
return deserializeBody(argWorld, body);
}
public Body deserializeBody(World argWorld, PbBody argBody) {
PbBody b = argBody;
BodyDef bd = new BodyDef();
bd.position.set(pbToVec(b.getPosition()));
bd.angle = b.getAngle();
bd.linearDamping = b.getLinearDamping();
bd.angularDamping = b.getAngularDamping();
bd.gravityScale = b.getGravityScale();
// velocities are populated after fixture addition
bd.bullet = b.getBullet();
bd.allowSleep = b.getAllowSleep();
bd.awake = b.getAwake();
bd.active = b.getActive();
bd.fixedRotation = b.getFixedRotation();
switch (b.getType()) {
case DYNAMIC:
bd.type = BodyType.DYNAMIC;
break;
case KINEMATIC:
bd.type = BodyType.KINEMATIC;
break;
case STATIC:
bd.type = BodyType.STATIC;
break;
default:
UnsupportedObjectException e =
new UnsupportedObjectException("Unknown body type: " + argBody.getType(), Type.BODY);
if (ulistener == null || ulistener.isUnsupported(e)) {
throw e;
}
return null;
}
Body body = argWorld.createBody(bd);
for (int i = 0; i < b.getFixturesCount(); i++) {
deserializeFixture(body, b.getFixtures(i));
}
// adding fixtures can change this, so we put this here and set it directly in the body
body.m_linearVelocity.set(pbToVec(b.getLinearVelocity()));
body.m_angularVelocity = b.getAngularVelocity();
if (listener != null && b.hasTag()) {
listener.processBody(body, b.getTag());
}
return body;
}
@Override
public Fixture deserializeFixture(Body argBody, InputStream argInput) throws IOException {
PbFixture fixture = PbFixture.parseFrom(argInput);
return deserializeFixture(argBody, fixture);
}
public Fixture deserializeFixture(Body argBody, PbFixture argFixture) {
PbFixture f = argFixture;
FixtureDef fd = new FixtureDef();
fd.density = f.getDensity();
fd.filter.categoryBits = f.getFilter().getCategoryBits();
fd.filter.groupIndex = f.getFilter().getGroupIndex();
fd.filter.maskBits = f.getFilter().getMaskBits();
fd.friction = f.getFriction();
fd.isSensor = f.getSensor();
fd.restitution = f.getRestitution();
fd.shape = deserializeShape(f.getShape());
Fixture fixture = argBody.createFixture(fd);
if (listener != null && f.hasTag()) {
listener.processFixture(fixture, f.getTag());
}
return fixture;
}
@Override
public Shape deserializeShape(InputStream argInput) throws IOException {
PbShape s = PbShape.parseFrom(argInput);
return deserializeShape(s);
}
public Shape deserializeShape(PbShape argShape) {
PbShape s = argShape;
Shape shape = null;
switch (s.getType()) {
case CIRCLE:
CircleShape c = new CircleShape();
c.m_p.set(pbToVec(s.getCenter()));
shape = c;
break;
case POLYGON:
PolygonShape p = new PolygonShape();
p.m_centroid.set(pbToVec(s.getCentroid()));
p.m_count = s.getPointsCount();
for (int i = 0; i < p.m_count; i++) {
p.m_vertices[i].set(pbToVec(s.getPoints(i)));
p.m_normals[i].set(pbToVec(s.getNormals(i)));
}
shape = p;
break;
case EDGE:
EdgeShape edge = new EdgeShape();
edge.m_vertex0.set(pbToVec(s.getV0()));
edge.m_vertex1.set(pbToVec(s.getV1()));
edge.m_vertex2.set(pbToVec(s.getV2()));
edge.m_vertex3.set(pbToVec(s.getV3()));
edge.m_hasVertex0 = s.getHas0();
edge.m_hasVertex3 = s.getHas3();
shape = edge;
break;
case CHAIN: {
ChainShape chain = new ChainShape();
chain.m_count = s.getPointsCount();
chain.m_vertices = new Vec2[chain.m_count];
for (int i = 0; i < chain.m_count; i++) {
chain.m_vertices[i] = new Vec2(pbToVec(s.getPoints(i)));
}
chain.m_hasPrevVertex = s.getHas0();
chain.m_hasNextVertex = s.getHas3();
chain.m_prevVertex.set(pbToVec(s.getPrev()));
chain.m_nextVertex.set(pbToVec(s.getNext()));
shape = chain;
break;
}
default: {
UnsupportedObjectException e =
new UnsupportedObjectException("Unknown shape type: " + s.getType(), Type.SHAPE);
if (ulistener == null || ulistener.isUnsupported(e)) {
throw e;
}
return null;
}
}
shape.m_radius = s.getRadius();
if (listener != null && s.hasTag()) {
listener.processShape(shape, s.getTag());
}
return shape;
}
@Override
public Joint deserializeJoint(World argWorld, InputStream argInput,
Map argBodyMap, Map jointMap) throws IOException {
PbJoint joint = PbJoint.parseFrom(argInput);
return deserializeJoint(argWorld, joint, argBodyMap, jointMap);
}
public Joint deserializeJoint(World argWorld, PbJoint joint, Map argBodyMap,
Map jointMap) {
JointDef jd = null;
switch (joint.getType()) {
case PRISMATIC: {
PrismaticJointDef def = new PrismaticJointDef();
jd = def;
def.enableLimit = joint.getEnableLimit();
def.enableMotor = joint.getEnableMotor();
def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
def.localAxisA.set(pbToVec(joint.getLocalAxisA()));
def.lowerTranslation = joint.getLowerLimit();
def.maxMotorForce = joint.getMaxMotorForce();
def.motorSpeed = joint.getMotorSpeed();
def.referenceAngle = joint.getRefAngle();
def.upperTranslation = joint.getUpperLimit();
break;
}
case REVOLUTE: {
RevoluteJointDef def = new RevoluteJointDef();
jd = def;
def.enableLimit = joint.getEnableLimit();
def.enableMotor = joint.getEnableMotor();
def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
def.lowerAngle = joint.getLowerLimit();
def.maxMotorTorque = joint.getMaxMotorTorque();
def.motorSpeed = joint.getMotorSpeed();
def.referenceAngle = joint.getRefAngle();
def.upperAngle = joint.getUpperLimit();
break;
}
case DISTANCE: {
DistanceJointDef def = new DistanceJointDef();
jd = def;
def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
def.dampingRatio = joint.getDampingRatio();
def.frequencyHz = joint.getFrequency();
def.length = joint.getLength();
break;
}
case PULLEY: {
PulleyJointDef def = new PulleyJointDef();
jd = def;
def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
def.groundAnchorA.set(pbToVec(joint.getGroundAnchorA()));
def.groundAnchorB.set(pbToVec(joint.getGroundAnchorB()));
def.lengthA = joint.getLengthA();
def.lengthB = joint.getLengthB();
def.ratio = joint.getRatio();
break;
}
case MOUSE: {
MouseJointDef def = new MouseJointDef();
jd = def;
def.dampingRatio = joint.getDampingRatio();
def.frequencyHz = joint.getFrequency();
def.maxForce = joint.getMaxForce();
def.target.set(pbToVec(joint.getTarget()));
break;
}
case GEAR: {
GearJointDef def = new GearJointDef();
jd = def;
if (!jointMap.containsKey(joint.getJoint1())) {
throw new IllegalArgumentException("Index " + joint.getJoint1()
+ " is not present in the joint map.");
}
def.joint1 = jointMap.get(joint.getJoint1());
if (!jointMap.containsKey(joint.getJoint2())) {
throw new IllegalArgumentException("Index " + joint.getJoint2()
+ " is not present in the joint map.");
}
def.joint2 = jointMap.get(joint.getJoint2());
def.ratio = joint.getRatio();
break;
}
case WHEEL: {
WheelJointDef def = new WheelJointDef();
jd = def;
def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
def.localAxisA.set(pbToVec(joint.getLocalAxisA()));
def.enableMotor = joint.getEnableMotor();
def.maxMotorTorque = joint.getMaxMotorTorque();
def.motorSpeed = joint.getMotorSpeed();
def.frequencyHz = joint.getFrequency();
def.dampingRatio = joint.getDampingRatio();
break;
}
case WELD: {
WeldJointDef def = new WeldJointDef();
jd = def;
def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
def.referenceAngle = joint.getRefAngle();
def.frequencyHz = joint.getFrequency();
def.dampingRatio = joint.getDampingRatio();
break;
}
case FRICTION: {
FrictionJointDef def = new FrictionJointDef();
jd = def;
def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
def.maxForce = joint.getMaxForce();
def.maxTorque = joint.getMaxTorque();
break;
}
case ROPE: {
RopeJointDef def = new RopeJointDef();
jd = def;
def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
def.maxLength = joint.getMaxLength();
return null;
}
case CONSTANT_VOLUME: {
ConstantVolumeJointDef def = new ConstantVolumeJointDef();
jd = def;
def.dampingRatio = joint.getDampingRatio();
def.frequencyHz = joint.getFrequency();
if (joint.getBodiesCount() != joint.getJointsCount()) {
throw new IllegalArgumentException(
"Constant volume joint must have bodies and joints defined");
}
for (int i = 0; i < joint.getBodiesCount(); i++) {
int body = joint.getBodies(i);
if (!argBodyMap.containsKey(body)) {
throw new IllegalArgumentException("Index " + body + " is not present in the body map");
}
int jointIndex = joint.getJoints(i);
if (!jointMap.containsKey(jointIndex)) {
throw new IllegalArgumentException("Index " + jointIndex
+ " is not present in the joint map");
}
Joint djoint = jointMap.get(jointIndex);
if (!(djoint instanceof DistanceJoint)) {
throw new IllegalArgumentException(
"Joints for constant volume joint must be distance joints");
}
def.addBodyAndJoint(argBodyMap.get(body), (DistanceJoint) djoint);
}
break;
}
case LINE: {
UnsupportedObjectException e =
new UnsupportedObjectException("Line joint no longer supported.", Type.JOINT);
if (ulistener == null || ulistener.isUnsupported(e)) {
throw e;
}
return null;
}
default: {
UnsupportedObjectException e =
new UnsupportedObjectException("Unknown joint type: " + joint.getType(), Type.JOINT);
if (ulistener == null || ulistener.isUnsupported(e)) {
throw e;
}
return null;
}
}
jd.collideConnected = joint.getCollideConnected();
if (!argBodyMap.containsKey(joint.getBodyA())) {
throw new IllegalArgumentException("Index " + joint.getBodyA()
+ " is not present in the body map");
}
jd.bodyA = argBodyMap.get(joint.getBodyA());
if (!argBodyMap.containsKey(joint.getBodyB())) {
throw new IllegalArgumentException("Index " + joint.getBodyB()
+ " is not present in the body map");
}
jd.bodyB = argBodyMap.get(joint.getBodyB());
Joint realJoint = argWorld.createJoint(jd);
if (listener != null && joint.hasTag()) {
listener.processJoint(realJoint, joint.getTag());
}
return realJoint;
}
private Vec2 pbToVec(PbVec2 argVec) {
return new Vec2(argVec.getX(), argVec.getY());
}
}
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