clockwerk-opensim-stable – Rev 1
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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.
*/
using System;
using System.Collections.Generic;
using Nini.Config;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Region.Physics.Manager;
namespace OpenSim.Region.Physics.POSPlugin
{
public class POSScene : PhysicsScene
{
private List<POSCharacter> _characters = new List<POSCharacter>();
private List<POSPrim> _prims = new List<POSPrim>();
private float[] _heightMap;
private const float gravity = -9.8f;
//protected internal string sceneIdentifier;
public POSScene(string engineType, String _sceneIdentifier)
{
EngineType = engineType;
Name = EngineType + "/" + _sceneIdentifier;
//sceneIdentifier = _sceneIdentifier;
}
public override void Initialise(IMesher meshmerizer, IConfigSource config)
{
}
public override void Dispose()
{
}
public override PhysicsActor AddAvatar(string avName, Vector3 position, Vector3 size, bool isFlying)
{
POSCharacter act = new POSCharacter();
act.Position = position;
act.Flying = isFlying;
_characters.Add(act);
return act;
}
public override void RemovePrim(PhysicsActor prim)
{
POSPrim p = (POSPrim) prim;
if (_prims.Contains(p))
{
_prims.Remove(p);
}
}
public override void RemoveAvatar(PhysicsActor character)
{
POSCharacter act = (POSCharacter) character;
if (_characters.Contains(act))
{
_characters.Remove(act);
}
}
/*
public override PhysicsActor AddPrim(Vector3 position, Vector3 size, Quaternion rotation)
{
return null;
}
*/
public override PhysicsActor AddPrimShape(string primName, PrimitiveBaseShape pbs, Vector3 position,
Vector3 size, Quaternion rotation, bool isPhysical, uint localid)
{
POSPrim prim = new POSPrim();
prim.Position = position;
prim.Orientation = rotation;
prim.Size = size;
_prims.Add(prim);
return prim;
}
private bool isColliding(POSCharacter c, POSPrim p)
{
Vector3 rotatedPos = new Vector3(c.Position.X - p.Position.X, c.Position.Y - p.Position.Y,
c.Position.Z - p.Position.Z) * Quaternion.Inverse(p.Orientation);
Vector3 avatarSize = new Vector3(c.Size.X, c.Size.Y, c.Size.Z) * Quaternion.Inverse(p.Orientation);
return (Math.Abs(rotatedPos.X) < (p.Size.X*0.5 + Math.Abs(avatarSize.X)) &&
Math.Abs(rotatedPos.Y) < (p.Size.Y*0.5 + Math.Abs(avatarSize.Y)) &&
Math.Abs(rotatedPos.Z) < (p.Size.Z*0.5 + Math.Abs(avatarSize.Z)));
}
private bool isCollidingWithPrim(POSCharacter c)
{
foreach (POSPrim p in _prims)
{
if (isColliding(c, p))
{
return true;
}
}
return false;
}
public override void AddPhysicsActorTaint(PhysicsActor prim)
{
}
public override float Simulate(float timeStep)
{
float fps = 0;
for (int i = 0; i < _characters.Count; ++i)
{
fps++;
POSCharacter character = _characters[i];
float oldposX = character.Position.X;
float oldposY = character.Position.Y;
float oldposZ = character.Position.Z;
if (!character.Flying)
{
character._target_velocity.Z += gravity * timeStep;
}
Vector3 characterPosition = character.Position;
characterPosition.X += character._target_velocity.X * timeStep;
characterPosition.Y += character._target_velocity.Y * timeStep;
characterPosition.X = Util.Clamp(character.Position.X, 0.01f, Constants.RegionSize - 0.01f);
characterPosition.Y = Util.Clamp(character.Position.Y, 0.01f, Constants.RegionSize - 0.01f);
bool forcedZ = false;
float terrainheight = _heightMap[(int)character.Position.Y * Constants.RegionSize + (int)character.Position.X];
if (character.Position.Z + (character._target_velocity.Z * timeStep) < terrainheight + 2)
{
characterPosition.Z = terrainheight + character.Size.Z;
forcedZ = true;
}
else
{
characterPosition.Z += character._target_velocity.Z*timeStep;
}
/// this is it -- the magic you've all been waiting for! Ladies and gentlemen --
/// Completely Bogus Collision Detection!!!
/// better known as the CBCD algorithm
if (isCollidingWithPrim(character))
{
characterPosition.Z = oldposZ; // first try Z axis
if (isCollidingWithPrim(character))
{
characterPosition.Z = oldposZ + character.Size.Z / 4.4f; // try harder
if (isCollidingWithPrim(character))
{
characterPosition.Z = oldposZ + character.Size.Z / 2.2f; // try very hard
if (isCollidingWithPrim(character))
{
characterPosition.X = oldposX;
characterPosition.Y = oldposY;
characterPosition.Z = oldposZ;
characterPosition.X += character._target_velocity.X * timeStep;
if (isCollidingWithPrim(character))
{
characterPosition.X = oldposX;
}
characterPosition.Y += character._target_velocity.Y * timeStep;
if (isCollidingWithPrim(character))
{
characterPosition.Y = oldposY;
}
}
else
{
forcedZ = true;
}
}
else
{
forcedZ = true;
}
}
else
{
forcedZ = true;
}
}
characterPosition.X = Util.Clamp(character.Position.X, 0.01f, Constants.RegionSize - 0.01f);
characterPosition.Y = Util.Clamp(character.Position.Y, 0.01f, Constants.RegionSize - 0.01f);
character.Position = characterPosition;
character._velocity.X = (character.Position.X - oldposX)/timeStep;
character._velocity.Y = (character.Position.Y - oldposY)/timeStep;
if (forcedZ)
{
character._velocity.Z = 0;
character._target_velocity.Z = 0;
((PhysicsActor)character).IsColliding = true;
character.RequestPhysicsterseUpdate();
}
else
{
((PhysicsActor)character).IsColliding = false;
character._velocity.Z = (character.Position.Z - oldposZ)/timeStep;
}
}
return fps;
}
public override void GetResults()
{
}
public override bool IsThreaded
{
// for now we won't be multithreaded
get { return (false); }
}
public override void SetTerrain(float[] heightMap)
{
_heightMap = heightMap;
}
public override void DeleteTerrain()
{
}
public override void SetWaterLevel(float baseheight)
{
}
public override Dictionary<uint, float> GetTopColliders()
{
Dictionary<uint, float> returncolliders = new Dictionary<uint, float>();
return returncolliders;
}
}
}