public b2Contact(b2Fixture fA, int indexA, b2Fixture fB, int indexB)
{
m_flags = b2ContactFlags.e_enabledFlag;
m_fixtureA = fA;
m_fixtureB = fB;
m_indexA = indexA;
m_indexB = indexB;
m_manifold = b2Manifold.Create();
m_manifold.pointCount = 0;
Prev = null;
Next = null;
m_NodeA = new b2ContactEdge();
m_NodeA.Contact = null;
m_NodeA.hasPrev = false;
m_NodeA.hasNext = false;
m_NodeA.Other = null;
m_nodeB = new b2ContactEdge();
m_nodeB.Contact = null;
m_nodeB.hasPrev = false;
m_nodeB.hasNext = false;
m_nodeB.Other = null;
m_toiCount = 0;
m_friction = b2Math.b2MixFriction(m_fixtureA.Friction, m_fixtureB.Friction);
m_restitution = b2Math.b2MixRestitution(m_fixtureA.Restitution, m_fixtureB.Restitution);
}
public b2Contact()
{
m_manifold = new b2Manifold();
NodeA = new b2ContactEdge();
NodeB = new b2ContactEdge();
}
protected b2Transform m_xf = b2Transform.Default; // the body origin transform
#endregion Fields
#region Constructors
public b2Body(b2BodyDef bd, b2World world)
{
m_flags = 0;
if (bd.bullet)
{
m_flags |= b2BodyFlags.e_bulletFlag;
}
if (bd.fixedRotation)
{
m_flags |= b2BodyFlags.e_fixedRotationFlag;
}
if (bd.allowSleep)
{
m_flags |= b2BodyFlags.e_autoSleepFlag;
}
if (bd.awake)
{
m_flags |= b2BodyFlags.e_awakeFlag;
}
if (bd.active)
{
m_flags |= b2BodyFlags.e_activeFlag;
}
m_world = world;
m_xf.p = bd.position;
m_xf.q.Set(bd.angle);
Sweep.localCenter.SetZero();
Sweep.c0 = m_xf.p;
Sweep.c = m_xf.p;
Sweep.a0 = bd.angle;
Sweep.a = bd.angle;
Sweep.alpha0 = 0.0f;
m_jointList = null;
m_contactList = null;
Prev = null;
Next = null;
m_linearVelocity = bd.linearVelocity;
m_angularVelocity = bd.angularVelocity;
m_linearDamping = bd.linearDamping;
m_angularDamping = bd.angularDamping;
m_gravityScale = bd.gravityScale;
m_force.SetZero();
m_torque = 0.0f;
m_sleepTime = 0.0f;
m_type = bd.type;
if (m_type == b2BodyType.b2_dynamicBody)
{
m_mass = 1.0f;
m_invMass = 1.0f;
}
else
{
m_mass = 0.0f;
m_invMass = 0.0f;
}
m_I = 0.0f;
m_invI = 0.0f;
m_userData = bd.userData;
m_fixtureList = null;
m_fixtureCount = 0;
}
public virtual void SetActive(bool flag)
{
if (flag == IsActive())
{
return;
}
if (flag)
{
m_flags |= b2BodyFlags.e_activeFlag;
// Create all proxies.
b2BroadPhase broadPhase = m_world.ContactManager.BroadPhase;
for (b2Fixture f = m_fixtureList; f != null; f = f.Next)
{
f.CreateProxies(broadPhase, m_xf);
}
// Contacts are created the next time step.
}
else
{
m_flags &= ~b2BodyFlags.e_activeFlag;
// Destroy all proxies.
b2BroadPhase broadPhase = m_world.ContactManager.BroadPhase;
for (b2Fixture f = m_fixtureList; f != null; f = f.Next)
{
f.DestroyProxies(broadPhase);
}
// Destroy the attached contacts.
b2ContactEdge ce = m_contactList;
while (ce != null)
{
b2ContactEdge ce0 = ce;
ce = ce.Next;
m_world.ContactManager.Destroy(ce0.Contact);
}
m_contactList = null;
}
}
public b2Contact(b2Fixture fA, int indexA, b2Fixture fB, int indexB)
{
m_flags = b2ContactFlags.e_enabledFlag;
m_fixtureA = fA;
m_fixtureB = fB;
m_indexA = indexA;
m_indexB = indexB;
m_manifold = b2Manifold.Create();
m_manifold.pointCount = 0;
Prev = null;
Next = null;
m_NodeA = new b2ContactEdge();
m_NodeA.Contact = null;
m_NodeA.hasPrev = false;
m_NodeA.hasNext = false;
m_NodeA.Other = null;
m_nodeB = new b2ContactEdge();
m_nodeB.Contact = null;
m_nodeB.hasPrev = false;
m_nodeB.hasNext = false;
m_nodeB.Other = null;
m_toiCount = 0;
m_friction = b2Math.b2MixFriction(m_fixtureA.Friction, m_fixtureB.Friction);
m_restitution = b2Math.b2MixRestitution(m_fixtureA.Restitution, m_fixtureB.Restitution);
}