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/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* 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.
* * Neither the name of the OpenSimulator Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``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 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.
*
* The quotations from http://wiki.secondlife.com/wiki/Linden_Vehicle_Tutorial
* are Copyright (c) 2009 Linden Research, Inc and are used under their license
* of Creative Commons Attribution-Share Alike 3.0
* (http://creativecommons.org/licenses/by-sa/3.0/).
*/
using System;
using System.Collections.Generic;
using System.Reflection;
using System.Runtime.InteropServices;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Region.Physics.Manager;
using OMV = OpenMetaverse;
namespace OpenSim.Region.Physics.BulletSPlugin
{
public class BSPrimDisplaced : BSPrim
{
// The purpose of this module is to do any mapping between what the simulator thinks
// the prim position and orientation is and what the physical position/orientation.
// This difference happens because Bullet assumes the center-of-mass is the <0,0,0>
// of the prim/linkset. The simulator tracks the location of the prim/linkset by
// the location of the root prim. So, if center-of-mass is anywhere but the origin
// of the root prim, the physical origin is displaced from the simulator origin.
//
// This routine works by capturing the Force* setting of position/orientation/... and
// adjusting the simulator values (being set) into the physical values.
// The conversion is also done in the opposite direction (physical origin -> simulator origin).
//
// The updateParameter call is also captured and the values from the physics engine
// are converted into simulator origin values before being passed to the base
// class.
public virtual OMV.Vector3 PositionDisplacement { get; set; }
public virtual OMV.Quaternion OrientationDisplacement { get; set; }
public BSPrimDisplaced(uint localID, String primName, BSScene parent_scene, OMV.Vector3 pos, OMV.Vector3 size,
OMV.Quaternion rotation, PrimitiveBaseShape pbs, bool pisPhysical)
: base(localID, primName, parent_scene, pos, size, rotation, pbs, pisPhysical)
{
ClearDisplacement();
}
public void ClearDisplacement()
{
PositionDisplacement = OMV.Vector3.Zero;
OrientationDisplacement = OMV.Quaternion.Identity;
}
// Set this sets and computes the displacement from the passed prim to the center-of-mass.
// A user set value for center-of-mass overrides whatever might be passed in here.
// The displacement is in local coordinates (relative to root prim in linkset oriented coordinates).
public virtual void SetEffectiveCenterOfMassDisplacement(Vector3 centerOfMassDisplacement)
{
Vector3 comDisp;
if (UserSetCenterOfMassDisplacement.HasValue)
comDisp = (OMV.Vector3)UserSetCenterOfMassDisplacement;
else
comDisp = centerOfMassDisplacement;
DetailLog("{0},BSPrimDisplaced.SetEffectiveCenterOfMassDisplacement,userSet={1},comDisp={2}",
LocalID, UserSetCenterOfMassDisplacement.HasValue, comDisp);
if (comDisp == Vector3.Zero)
{
// If there is no diplacement. Things get reset.
PositionDisplacement = OMV.Vector3.Zero;
OrientationDisplacement = OMV.Quaternion.Identity;
}
else
{
// Remember the displacement from root as well as the origional rotation of the
// new center-of-mass.
PositionDisplacement = comDisp;
OrientationDisplacement = OMV.Quaternion.Identity;
}
}
public override Vector3 ForcePosition
{
get { return base.ForcePosition; }
set
{
if (PositionDisplacement != OMV.Vector3.Zero)
{
OMV.Vector3 displacedPos = value - (PositionDisplacement * RawOrientation);
DetailLog("{0},BSPrimDisplaced.ForcePosition,val={1},disp={2},newPos={3}", LocalID, value, PositionDisplacement, displacedPos);
base.ForcePosition = displacedPos;
}
else
{
base.ForcePosition = value;
}
}
}
public override Quaternion ForceOrientation
{
get { return base.ForceOrientation; }
set
{
// TODO:
base.ForceOrientation = value;
}
}
// TODO: decide if this is the right place for these variables.
// Somehow incorporate the optional settability by the user.
// Is this used?
public override OMV.Vector3 CenterOfMass
{
get { return RawPosition; }
}
// Is this used?
public override OMV.Vector3 GeometricCenter
{
get { return RawPosition; }
}
public override void UpdateProperties(EntityProperties entprop)
{
// Undo any center-of-mass displacement that might have been done.
if (PositionDisplacement != OMV.Vector3.Zero || OrientationDisplacement != OMV.Quaternion.Identity)
{
// Correct for any rotation around the center-of-mass
// TODO!!!
OMV.Vector3 displacedPos = entprop.Position + (PositionDisplacement * entprop.Rotation);
DetailLog("{0},BSPrimDisplaced.ForcePosition,physPos={1},disp={2},newPos={3}", LocalID, entprop.Position, PositionDisplacement, displacedPos);
entprop.Position = displacedPos;
// entprop.Rotation = something;
}
base.UpdateProperties(entprop);
}
}
}
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