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/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.badlogic.gdx.physics.box2d;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.physics.box2d.BodyDef.BodyType;
import com.badlogic.gdx.utils.Array;
/** A rigid body. These are created via World.CreateBody.
* @author mzechner */
public class Body {
// @off
/*JNI
#include
*/
/** the address of the body **/
protected long addr;
/** temporary float array **/
private final float[] tmp = new float[4];
/** World **/
private final World world;
/** Fixtures of this body **/
private Array fixtures = new Array(2);
/** Joints of this body **/
protected Array joints = new Array(2);
/** user data **/
private Object userData;
/** Constructs a new body with the given address
* @param world the world
* @param addr the address */
protected Body (World world, long addr) {
this.world = world;
this.addr = addr;
}
/** Resets this body after fetching it from the {@link World#freeBodies} Pool. */
protected void reset (long addr) {
this.addr = addr;
this.userData = null;
for (int i = 0; i < fixtures.size; i++)
this.world.freeFixtures.free(fixtures.get(i));
fixtures.clear();
this.joints.clear();
}
/** Creates a fixture and attach it to this body. Use this function if you need to set some fixture parameters, like friction.
* Otherwise you can create the fixture directly from a shape. If the density is non-zero, this function automatically updates
* the mass of the body. Contacts are not created until the next time step.
* @param def the fixture definition.
* @warning This function is locked during callbacks. */
public Fixture createFixture (FixtureDef def) {
long fixtureAddr = jniCreateFixture(addr, def.shape.addr, def.friction, def.restitution, def.density, def.isSensor,
def.filter.categoryBits, def.filter.maskBits, def.filter.groupIndex);
Fixture fixture = this.world.freeFixtures.obtain();
fixture.reset(this, fixtureAddr);
this.world.fixtures.put(fixture.addr, fixture);
this.fixtures.add(fixture);
return fixture;
}
private native long jniCreateFixture (long addr, long shapeAddr, float friction, float restitution, float density,
boolean isSensor, short filterCategoryBits, short filterMaskBits, short filterGroupIndex); /*
b2Body* body = (b2Body*)addr;
b2Shape* shape = (b2Shape*)shapeAddr;
b2FixtureDef fixtureDef;
fixtureDef.shape = shape;
fixtureDef.friction = friction;
fixtureDef.restitution = restitution;
fixtureDef.density = density;
fixtureDef.isSensor = isSensor;
fixtureDef.filter.maskBits = filterMaskBits;
fixtureDef.filter.categoryBits = filterCategoryBits;
fixtureDef.filter.groupIndex = filterGroupIndex;
return (jlong)body->CreateFixture( &fixtureDef );
*/
/** Creates a fixture from a shape and attach it to this body. This is a convenience function. Use b2FixtureDef if you need to
* set parameters like friction, restitution, user data, or filtering. If the density is non-zero, this function automatically
* updates the mass of the body.
* @param shape the shape to be cloned.
* @param density the shape density (set to zero for static bodies).
* @warning This function is locked during callbacks. */
public Fixture createFixture (Shape shape, float density) {
long fixtureAddr = jniCreateFixture(addr, shape.addr, density);
Fixture fixture = this.world.freeFixtures.obtain();
fixture.reset(this, fixtureAddr);
this.world.fixtures.put(fixture.addr, fixture);
this.fixtures.add(fixture);
return fixture;
}
private native long jniCreateFixture (long addr, long shapeAddr, float density); /*
b2Body* body = (b2Body*)addr;
b2Shape* shape = (b2Shape*)shapeAddr;
return (jlong)body->CreateFixture( shape, density );
*/
/** Destroy a fixture. This removes the fixture from the broad-phase and destroys all contacts associated with this fixture.
* This will automatically adjust the mass of the body if the body is dynamic and the fixture has positive density. All
* fixtures attached to a body are implicitly destroyed when the body is destroyed.
* @param fixture the fixture to be removed.
* @warning This function is locked during callbacks. */
public void destroyFixture (Fixture fixture) {
jniDestroyFixture(addr, fixture.addr);
this.world.fixtures.remove(fixture.addr);
this.fixtures.removeValue(fixture, true);
this.world.freeFixtures.free(fixture);
}
private native void jniDestroyFixture (long addr, long fixtureAddr); /*
b2Body* body = (b2Body*)addr;
b2Fixture* fixture = (b2Fixture*)fixtureAddr;
body->DestroyFixture(fixture);
*/
/** Set the position of the body's origin and rotation. This breaks any contacts and wakes the other bodies. Manipulating a
* body's transform may cause non-physical behavior.
* @param position the world position of the body's local origin.
* @param angle the world rotation in radians. */
public void setTransform (Vector2 position, float angle) {
jniSetTransform(addr, position.x, position.y, angle);
}
/** Set the position of the body's origin and rotation. This breaks any contacts and wakes the other bodies. Manipulating a
* body's transform may cause non-physical behavior.
* @param x the world position on the x-axis
* @param y the world position on the y-axis
* @param angle the world rotation in radians. */
public void setTransform (float x, float y, float angle) {
jniSetTransform(addr, x, y, angle);
}
private native void jniSetTransform (long addr, float positionX, float positionY, float angle); /*
b2Body* body = (b2Body*)addr;
body->SetTransform(b2Vec2(positionX, positionY), angle);
*/
private final Transform transform = new Transform();
/** Get the body transform for the body's origin. */
public Transform getTransform () {
jniGetTransform(addr, transform.vals);
return transform;
}
private native void jniGetTransform (long addr, float[] vals); /*
b2Body* body = (b2Body*)addr;
b2Transform t = body->GetTransform();
vals[0] = t.p.x;
vals[1] = t.p.y;
vals[2] = t.q.c;
vals[3] = t.q.s;
*/
private final Vector2 position = new Vector2();
/** Get the world body origin position.
* Note that the same Vector2 instance is returned each time this method is called.
* @return the world position of the body's origin. */
public Vector2 getPosition () {
jniGetPosition(addr, tmp);
position.x = tmp[0];
position.y = tmp[1];
return position;
}
private native void jniGetPosition (long addr, float[] position); /*
b2Body* body = (b2Body*)addr;
b2Vec2 p = body->GetPosition();
position[0] = p.x;
position[1] = p.y;
*/
/** Get the angle in radians.
* @return the current world rotation angle in radians. */
public float getAngle () {
return jniGetAngle(addr);
}
private native float jniGetAngle (long addr); /*
b2Body* body = (b2Body*)addr;
return body->GetAngle();
*/
private final Vector2 worldCenter = new Vector2();
/** Get the world position of the center of mass.
* Note that the same Vector2 instance is returned each time this method is called. */
public Vector2 getWorldCenter () {
jniGetWorldCenter(addr, tmp);
worldCenter.x = tmp[0];
worldCenter.y = tmp[1];
return worldCenter;
}
private native void jniGetWorldCenter (long addr, float[] worldCenter); /*
b2Body* body = (b2Body*)addr;
b2Vec2 w = body->GetWorldCenter();
worldCenter[0] = w.x;
worldCenter[1] = w.y;
*/
private final Vector2 localCenter = new Vector2();
/** Get the local position of the center of mass.
* Note that the same Vector2 instance is returned each time this method is called. */
public Vector2 getLocalCenter () {
jniGetLocalCenter(addr, tmp);
localCenter.x = tmp[0];
localCenter.y = tmp[1];
return localCenter;
}
private native void jniGetLocalCenter (long addr, float[] localCenter); /*
b2Body* body = (b2Body*)addr;
b2Vec2 w = body->GetLocalCenter();
localCenter[0] = w.x;
localCenter[1] = w.y;
*/
/** Set the linear velocity of the center of mass. */
public void setLinearVelocity (Vector2 v) {
jniSetLinearVelocity(addr, v.x, v.y);
}
/** Set the linear velocity of the center of mass. */
public void setLinearVelocity (float vX, float vY) {
jniSetLinearVelocity(addr, vX, vY);
}
private native void jniSetLinearVelocity (long addr, float x, float y); /*
b2Body* body = (b2Body*)addr;
body->SetLinearVelocity(b2Vec2(x, y));
*/
private final Vector2 linearVelocity = new Vector2();
/** Get the linear velocity of the center of mass.
* Note that the same Vector2 instance is returned each time this method is called. */
public Vector2 getLinearVelocity () {
jniGetLinearVelocity(addr, tmp);
linearVelocity.x = tmp[0];
linearVelocity.y = tmp[1];
return linearVelocity;
}
private native void jniGetLinearVelocity (long addr, float[] linearVelocity); /*
b2Body* body = (b2Body*)addr;
b2Vec2 l = body->GetLinearVelocity();
linearVelocity[0] = l.x;
linearVelocity[1] = l.y;
*/
/** Set the angular velocity. */
public void setAngularVelocity (float omega) {
jniSetAngularVelocity(addr, omega);
}
private native void jniSetAngularVelocity (long addr, float omega); /*
b2Body* body = (b2Body*)addr;
body->SetAngularVelocity(omega);
*/
/** Get the angular velocity. */
public float getAngularVelocity () {
return jniGetAngularVelocity(addr);
}
private native float jniGetAngularVelocity (long addr); /*
b2Body* body = (b2Body*)addr;
return body->GetAngularVelocity();
*/
/** Apply a force at a world point. If the force is not applied at the center of mass, it will generate a torque and affect the
* angular velocity. This wakes up the body.
* @param force the world force vector, usually in Newtons (N).
* @param point the world position of the point of application.
* @param wake up the body */
public void applyForce (Vector2 force, Vector2 point, boolean wake) {
jniApplyForce(addr, force.x, force.y, point.x, point.y, wake);
}
/** Apply a force at a world point. If the force is not applied at the center of mass, it will generate a torque and affect the
* angular velocity. This wakes up the body.
* @param forceX the world force vector on x, usually in Newtons (N).
* @param forceY the world force vector on y, usually in Newtons (N).
* @param pointX the world position of the point of application on x.
* @param pointY the world position of the point of application on y.
* @param wake up the body*/
public void applyForce (float forceX, float forceY, float pointX, float pointY, boolean wake) {
jniApplyForce(addr, forceX, forceY, pointX, pointY, wake);
}
private native void jniApplyForce (long addr, float forceX, float forceY, float pointX, float pointY, boolean wake); /*
b2Body* body = (b2Body*)addr;
body->ApplyForce(b2Vec2(forceX, forceY), b2Vec2(pointX, pointY), wake);
*/
/** Apply a force to the center of mass. This wakes up the body.
* @param force the world force vector, usually in Newtons (N). */
public void applyForceToCenter (Vector2 force, boolean wake) {
jniApplyForceToCenter(addr, force.x, force.y, wake);
}
/** Apply a force to the center of mass. This wakes up the body.
* @param forceX the world force vector, usually in Newtons (N).
* @param forceY the world force vector, usually in Newtons (N). */
public void applyForceToCenter (float forceX, float forceY, boolean wake) {
jniApplyForceToCenter(addr, forceX, forceY, wake);
}
private native void jniApplyForceToCenter (long addr, float forceX, float forceY, boolean wake); /*
b2Body* body = (b2Body*)addr;
body->ApplyForceToCenter(b2Vec2(forceX, forceY), wake);
*/
/** Apply a torque. This affects the angular velocity without affecting the linear velocity of the center of mass. This wakes up
* the body.
* @param torque about the z-axis (out of the screen), usually in N-m.
* @param wake up the body */
public void applyTorque (float torque, boolean wake) {
jniApplyTorque(addr, torque, wake);
}
private native void jniApplyTorque (long addr, float torque, boolean wake); /*
b2Body* body = (b2Body*)addr;
body->ApplyTorque(torque, wake);
*/
/** Apply an impulse at a point. This immediately modifies the velocity. It also modifies the angular velocity if the point of
* application is not at the center of mass. This wakes up the body.
* @param impulse the world impulse vector, usually in N-seconds or kg-m/s.
* @param point the world position of the point of application.
* @param wake up the body*/
public void applyLinearImpulse (Vector2 impulse, Vector2 point, boolean wake) {
jniApplyLinearImpulse(addr, impulse.x, impulse.y, point.x, point.y, wake);
}
/** Apply an impulse at a point. This immediately modifies the velocity. It also modifies the angular velocity if the point of
* application is not at the center of mass. This wakes up the body.
* @param impulseX the world impulse vector on the x-axis, usually in N-seconds or kg-m/s.
* @param impulseY the world impulse vector on the y-axis, usually in N-seconds or kg-m/s.
* @param pointX the world position of the point of application on the x-axis.
* @param pointY the world position of the point of application on the y-axis.
* @param wake up the body*/
public void applyLinearImpulse (float impulseX, float impulseY, float pointX, float pointY, boolean wake) {
jniApplyLinearImpulse(addr, impulseX, impulseY, pointX, pointY, wake);
}
private native void jniApplyLinearImpulse (long addr, float impulseX, float impulseY, float pointX, float pointY, boolean wake); /*
b2Body* body = (b2Body*)addr;
body->ApplyLinearImpulse( b2Vec2( impulseX, impulseY ), b2Vec2( pointX, pointY ), wake);
*/
/** Apply an angular impulse.
* @param impulse the angular impulse in units of kg*m*m/s */
public void applyAngularImpulse (float impulse, boolean wake) {
jniApplyAngularImpulse(addr, impulse, wake);
}
private native void jniApplyAngularImpulse (long addr, float impulse, boolean wake); /*
b2Body* body = (b2Body*)addr;
body->ApplyAngularImpulse(impulse, wake);
*/
/** Get the total mass of the body.
* @return the mass, usually in kilograms (kg). */
public float getMass () {
return jniGetMass(addr);
}
private native float jniGetMass (long addr); /*
b2Body* body = (b2Body*)addr;
return body->GetMass();
*/
/** Get the rotational inertia of the body about the local origin.
* @return the rotational inertia, usually in kg-m^2. */
public float getInertia () {
return jniGetInertia(addr);
}
private native float jniGetInertia (long addr); /*
b2Body* body = (b2Body*)addr;
return body->GetInertia();
*/
private final MassData massData = new MassData();
/** Get the mass data of the body.
* @return a struct containing the mass, inertia and center of the body. */
public MassData getMassData () {
jniGetMassData(addr, tmp);
massData.mass = tmp[0];
massData.center.x = tmp[1];
massData.center.y = tmp[2];
massData.I = tmp[3];
return massData;
}
private native void jniGetMassData (long addr, float[] massData); /*
b2Body* body = (b2Body*)addr;
b2MassData m;
body->GetMassData(&m);
massData[0] = m.mass;
massData[1] = m.center.x;
massData[2] = m.center.y;
massData[3] = m.I;
*/
/** Set the mass properties to override the mass properties of the fixtures. Note that this changes the center of mass position.
* Note that creating or destroying fixtures can also alter the mass. This function has no effect if the body isn't dynamic.
* @param data the mass properties. */
public void setMassData (MassData data) {
jniSetMassData(addr, data.mass, data.center.x, data.center.y, data.I);
}
private native void jniSetMassData (long addr, float mass, float centerX, float centerY, float I); /*
b2Body* body = (b2Body*)addr;
b2MassData m;
m.mass = mass;
m.center.x = centerX;
m.center.y = centerY;
m.I = I;
body->SetMassData(&m);
*/
/** This resets the mass properties to the sum of the mass properties of the fixtures. This normally does not need to be called
* unless you called SetMassData to override the mass and you later want to reset the mass. */
public void resetMassData () {
jniResetMassData(addr);
}
private native void jniResetMassData (long addr); /*
b2Body* body = (b2Body*)addr;
body->ResetMassData();
*/
private final Vector2 localPoint = new Vector2();
/** Get the world coordinates of a point given the local coordinates.
* Note that the same Vector2 instance is returned each time this method is called.
* @param localPoint a point on the body measured relative the the body's origin.
* @return the same point expressed in world coordinates. */
public Vector2 getWorldPoint (Vector2 localPoint) {
jniGetWorldPoint(addr, localPoint.x, localPoint.y, tmp);
this.localPoint.x = tmp[0];
this.localPoint.y = tmp[1];
return this.localPoint;
}
private native void jniGetWorldPoint (long addr, float localPointX, float localPointY, float[] worldPoint); /*
b2Body* body = (b2Body*)addr;
b2Vec2 w = body->GetWorldPoint( b2Vec2( localPointX, localPointY ) );
worldPoint[0] = w.x;
worldPoint[1] = w.y;
*/
private final Vector2 worldVector = new Vector2();
/** Get the world coordinates of a vector given the local coordinates.
* Note that the same Vector2 instance is returned each time this method is called.
* @param localVector a vector fixed in the body.
* @return the same vector expressed in world coordinates. */
public Vector2 getWorldVector (Vector2 localVector) {
jniGetWorldVector(addr, localVector.x, localVector.y, tmp);
worldVector.x = tmp[0];
worldVector.y = tmp[1];
return worldVector;
}
private native void jniGetWorldVector (long addr, float localVectorX, float localVectorY, float[] worldVector); /*
b2Body* body = (b2Body*)addr;
b2Vec2 w = body->GetWorldVector( b2Vec2( localVectorX, localVectorY ) );
worldVector[0] = w.x;
worldVector[1] = w.y;
*/
public final Vector2 localPoint2 = new Vector2();
/** Gets a local point relative to the body's origin given a world point.
* Note that the same Vector2 instance is returned each time this method is called.
* @param worldPoint a point in world coordinates.
* @return the corresponding local point relative to the body's origin. */
public Vector2 getLocalPoint (Vector2 worldPoint) {
jniGetLocalPoint(addr, worldPoint.x, worldPoint.y, tmp);
localPoint2.x = tmp[0];
localPoint2.y = tmp[1];
return localPoint2;
}
private native void jniGetLocalPoint (long addr, float worldPointX, float worldPointY, float[] localPoint); /*
b2Body* body = (b2Body*)addr;
b2Vec2 w = body->GetLocalPoint( b2Vec2( worldPointX, worldPointY ) );
localPoint[0] = w.x;
localPoint[1] = w.y;
*/
public final Vector2 localVector = new Vector2();
/** Gets a local vector given a world vector.
* Note that the same Vector2 instance is returned each time this method is called.
* @param worldVector a vector in world coordinates.
* @return the corresponding local vector. */
public Vector2 getLocalVector (Vector2 worldVector) {
jniGetLocalVector(addr, worldVector.x, worldVector.y, tmp);
localVector.x = tmp[0];
localVector.y = tmp[1];
return localVector;
}
private native void jniGetLocalVector (long addr, float worldVectorX, float worldVectorY, float[] worldVector); /*
b2Body* body = (b2Body*)addr;
b2Vec2 w = body->GetLocalVector( b2Vec2( worldVectorX, worldVectorY ) );
worldVector[0] = w.x;
worldVector[1] = w.y;
*/
public final Vector2 linVelWorld = new Vector2();
/** Get the world linear velocity of a world point attached to this body.
* Note that the same Vector2 instance is returned each time this method is called.
* @param worldPoint a point in world coordinates.
* @return the world velocity of a point. */
public Vector2 getLinearVelocityFromWorldPoint (Vector2 worldPoint) {
jniGetLinearVelocityFromWorldPoint(addr, worldPoint.x, worldPoint.y, tmp);
linVelWorld.x = tmp[0];
linVelWorld.y = tmp[1];
return linVelWorld;
}
private native void jniGetLinearVelocityFromWorldPoint (long addr, float worldPointX, float worldPointY, float[] linVelWorld); /*
b2Body* body = (b2Body*)addr;
b2Vec2 w = body->GetLinearVelocityFromWorldPoint( b2Vec2( worldPointX, worldPointY ) );
linVelWorld[0] = w.x;
linVelWorld[1] = w.y;
*/
public final Vector2 linVelLoc = new Vector2();
/** Get the world velocity of a local point.
* Note that the same Vector2 instance is returned each time this method is called.
* @param localPoint a point in local coordinates.
* @return the world velocity of a point. */
public Vector2 getLinearVelocityFromLocalPoint (Vector2 localPoint) {
jniGetLinearVelocityFromLocalPoint(addr, localPoint.x, localPoint.y, tmp);
linVelLoc.x = tmp[0];
linVelLoc.y = tmp[1];
return linVelLoc;
}
private native void jniGetLinearVelocityFromLocalPoint (long addr, float localPointX, float localPointY, float[] linVelLoc); /*
b2Body* body = (b2Body*)addr;
b2Vec2 w = body->GetLinearVelocityFromLocalPoint( b2Vec2( localPointX, localPointY ) );
linVelLoc[0] = w.x;
linVelLoc[1] = w.y;
*/
/** Get the linear damping of the body. */
public float getLinearDamping () {
return jniGetLinearDamping(addr);
}
private native float jniGetLinearDamping (long addr); /*
b2Body* body = (b2Body*)addr;
return body->GetLinearDamping();
*/
/** Set the linear damping of the body. */
public void setLinearDamping (float linearDamping) {
jniSetLinearDamping(addr, linearDamping);
}
private native void jniSetLinearDamping (long addr, float linearDamping); /*
b2Body* body = (b2Body*)addr;
body->SetLinearDamping(linearDamping);
*/
/** Get the angular damping of the body. */
public float getAngularDamping () {
return jniGetAngularDamping(addr);
}
private native float jniGetAngularDamping (long addr); /*
b2Body* body = (b2Body*)addr;
return body->GetAngularDamping();
*/
/** Set the angular damping of the body. */
public void setAngularDamping (float angularDamping) {
jniSetAngularDamping(addr, angularDamping);
}
private native void jniSetAngularDamping (long addr, float angularDamping); /*
b2Body* body = (b2Body*)addr;
body->SetAngularDamping(angularDamping);
*/
/** Set the type of this body. This may alter the mass and velocity. */
public void setType (BodyType type) {
jniSetType(addr, type.getValue());
}
// @off
/*JNI
inline b2BodyType getBodyType( int type )
{
switch( type )
{
case 0: return b2_staticBody;
case 1: return b2_kinematicBody;
case 2: return b2_dynamicBody;
default:
return b2_staticBody;
}
}
*/
private native void jniSetType (long addr, int type); /*
b2Body* body = (b2Body*)addr;
body->SetType(getBodyType(type));
*/
/** Get the type of this body. */
public BodyType getType () {
int type = jniGetType(addr);
if (type == 0) return BodyType.StaticBody;
if (type == 1) return BodyType.KinematicBody;
if (type == 2) return BodyType.DynamicBody;
return BodyType.StaticBody;
}
private native int jniGetType (long addr); /*
b2Body* body = (b2Body*)addr;
return body->GetType();
*/
/** Should this body be treated like a bullet for continuous collision detection? */
public void setBullet (boolean flag) {
jniSetBullet(addr, flag);
}
private native void jniSetBullet (long addr, boolean flag); /*
b2Body* body = (b2Body*)addr;
body->SetBullet(flag);
*/
/** Is this body treated like a bullet for continuous collision detection? */
public boolean isBullet () {
return jniIsBullet(addr);
}
private native boolean jniIsBullet (long addr); /*
b2Body* body = (b2Body*)addr;
return body->IsBullet();
*/
/** You can disable sleeping on this body. If you disable sleeping, the */
public void setSleepingAllowed (boolean flag) {
jniSetSleepingAllowed(addr, flag);
}
private native void jniSetSleepingAllowed (long addr, boolean flag); /*
b2Body* body = (b2Body*)addr;
body->SetSleepingAllowed(flag);
*/
/** Is this body allowed to sleep */
public boolean isSleepingAllowed () {
return jniIsSleepingAllowed(addr);
}
private native boolean jniIsSleepingAllowed (long addr); /*
b2Body* body = (b2Body*)addr;
return body->IsSleepingAllowed();
*/
/** Set the sleep state of the body. A sleeping body has very low CPU cost.
* @param flag set to true to put body to sleep, false to wake it. */
public void setAwake (boolean flag) {
jniSetAwake(addr, flag);
}
private native void jniSetAwake (long addr, boolean flag); /*
b2Body* body = (b2Body*)addr;
body->SetAwake(flag);
*/
/** Get the sleeping state of this body.
* @return true if the body is sleeping. */
public boolean isAwake () {
return jniIsAwake(addr);
}
private native boolean jniIsAwake (long addr); /*
b2Body* body = (b2Body*)addr;
return body->IsAwake();
*/
/** Set the active state of the body. An inactive body is not simulated and cannot be collided with or woken up. If you pass a
* flag of true, all fixtures will be added to the broad-phase. If you pass a flag of false, all fixtures will be removed from
* the broad-phase and all contacts will be destroyed. Fixtures and joints are otherwise unaffected. You may continue to
* create/destroy fixtures and joints on inactive bodies. Fixtures on an inactive body are implicitly inactive and will not
* participate in collisions, ray-casts, or queries. Joints connected to an inactive body are implicitly inactive. An inactive
* body is still owned by a b2World object and remains in the body list. */
public void setActive (boolean flag) {
jniSetActive(addr, flag);
}
private native void jniSetActive (long addr, boolean flag); /*
b2Body* body = (b2Body*)addr;
body->SetActive(flag);
*/
/** Get the active state of the body. */
public boolean isActive () {
return jniIsActive(addr);
}
private native boolean jniIsActive (long addr); /*
b2Body* body = (b2Body*)addr;
return body->IsActive();
*/
/** Set this body to have fixed rotation. This causes the mass to be reset. */
public void setFixedRotation (boolean flag) {
jniSetFixedRotation(addr, flag);
}
private native void jniSetFixedRotation (long addr, boolean flag); /*
b2Body* body = (b2Body*)addr;
body->SetFixedRotation(flag);
*/
/** Does this body have fixed rotation? */
public boolean isFixedRotation () {
return jniIsFixedRotation(addr);
}
private native boolean jniIsFixedRotation (long addr); /*
b2Body* body = (b2Body*)addr;
return body->IsFixedRotation();
*/
/** Get the list of all fixtures attached to this body. Do not modify the list! */
public Array getFixtureList () {
return fixtures;
}
/** Get the list of all joints attached to this body. Do not modify the list! */
public Array getJointList () {
return joints;
}
/** Get the list of all contacts attached to this body.
* @warning this list changes during the time step and you may miss some collisions if you don't use b2ContactListener. Do not
* modify the returned list! */
// Array getContactList()
// {
// return contacts;
// }
/** @return Get the gravity scale of the body. */
public float getGravityScale () {
return jniGetGravityScale(addr);
}
private native float jniGetGravityScale (long addr); /*
b2Body* body = (b2Body*)addr;
return body->GetGravityScale();
*/
/** Sets the gravity scale of the body */
public void setGravityScale (float scale) {
jniSetGravityScale(addr, scale);
}
private native void jniSetGravityScale (long addr, float scale); /*
b2Body* body = (b2Body*)addr;
body->SetGravityScale(scale);
*/
/** Get the parent world of this body. */
public World getWorld () {
return world;
}
/** Get the user data */
public Object getUserData () {
return userData;
}
/** Set the user data */
public void setUserData (Object userData) {
this.userData = userData;
}
}
