Exemplo n.º 1
0
        private void CheckDeactivation()
        {
            // A body deactivation DOESN'T kill the contacts - they are stored in
            // the arbitermap within the arbiters. So, waking up ist STABLE - old
            // contacts are reused. Also the collisionislands build every frame (based
            // on the contacts) keep the same.

            for (int i = 0; i < islands.Count; i++)
            {
                CollisionIsland island = islands[i];

                bool deactivateIsland = true;

                // global allowdeactivation
                if (!this.AllowDeactivation)
                {
                    deactivateIsland = false;
                }
                else
                {
                    foreach (RigidBody body in island.bodies)
                    {
                        // body allowdeactivation
                        if (body.AllowDeactivation && (body.angularVelocity.LengthSquared() < inactiveAngularThresholdSq &&
                                                       (body.linearVelocity.LengthSquared() < inactiveLinearThresholdSq)))
                        {
                            body.inactiveTime += timestep;
                            if (body.inactiveTime < deactivationTime)
                            {
                                deactivateIsland = false;
                            }
                        }
                        else
                        {
                            body.inactiveTime = 0.0f;
                            deactivateIsland  = false;
                        }
                    }
                }

                foreach (RigidBody body in island.bodies)
                {
                    if (body.isActive == deactivateIsland)
                    {
                        if (body.isActive)
                        {
                            body.IsActive = false;
                            events.RaiseDeactivatedBody(body);
                        }
                        else
                        {
                            body.IsActive = true;
                            events.RaiseActivatedBody(body);
                        }
                    }
                }
            }
        }
        private void CheckDeactivation()
        {
            if (!AllowDeactivation)
            {
                return;
            }

            // A body deactivation DOESN'T kill the contacts - they are stored in
            // the arbitermap within the arbiters. So, waking up ist STABLE - old
            // contacts are reused. Also the collisionislands build every frame (based
            // on the contacts) keep the same.

            foreach (CollisionIsland island in islands)
            {
                bool deactivateIsland = true;

                // global allowdeactivation
                if (!this.AllowDeactivation)
                {
                    deactivateIsland = false;
                }
                else
                {
                    for (int index = 0, length = island.bodies.Count; index < length; index++)
                    {
                        RigidBody body = island.bodies[index];
                        // body allowdeactivation
                        if (body.AllowDeactivation && (body.angularVelocity.sqrMagnitude < inactiveAngularThresholdSq &&
                                                       (body.linearVelocity.sqrMagnitude < inactiveLinearThresholdSq)))
                        {
                            body.inactiveTime += timestep;
                            if (body.inactiveTime < deactivationTime)
                            {
                                deactivateIsland = false;
                            }
                        }
                        else
                        {
                            body.inactiveTime = FP.Zero;
                            deactivateIsland  = false;
                        }
                    }
                }

                for (int index = 0, length = island.bodies.Count; index < length; index++)
                {
                    RigidBody body = island.bodies[index];

                    if (body.isActive == deactivateIsland)
                    {
                        if (body.isActive)
                        {
                            body.IsActive = false;
                            events.RaiseDeactivatedBody(body);
                        }
                        else
                        {
                            body.IsActive = true;
                            events.RaiseActivatedBody(body);
                        }
                    }
                }
            }
        }