/* * Copyright (c) Contributors, http://www.openmetaverse.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 OpenSim 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.Collections.Generic; using Axiom.Math; using OpenSim.Physics.Manager; namespace OpenSim.Region.Physics.BasicPhysicsPlugin { /// <summary> /// Will be the PhysX plugin but for now will be a very basic physics engine /// </summary> public class BasicPhysicsPlugin : IPhysicsPlugin { public BasicPhysicsPlugin() { } public bool Init() { return true; } public PhysicsScene GetScene() { return new BasicScene(); } public string GetName() { return ("basicphysics"); } public void Dispose() { } } public class BasicScene : PhysicsScene { private List<BasicActor> _actors = new List<BasicActor>(); private float[] _heightMap; public BasicScene() { } public override PhysicsActor AddAvatar(PhysicsVector position) { BasicActor act = new BasicActor(); act.Position = position; _actors.Add(act); return act; } public override void RemovePrim(PhysicsActor prim) { } public override void RemoveAvatar(PhysicsActor actor) { BasicActor act = (BasicActor)actor; if (_actors.Contains(act)) { _actors.Remove(act); } } public override PhysicsActor AddPrim(PhysicsVector position, PhysicsVector size, Quaternion rotation) { return null; } public override void Simulate(float timeStep) { foreach (BasicActor actor in _actors) { actor.Position.X = actor.Position.X + (actor.Velocity.X * timeStep); actor.Position.Y = actor.Position.Y + (actor.Velocity.Y * timeStep); if (actor.Position.Y < 0) { actor.Position.Y = 0.1F; } else if (actor.Position.Y >= 256) { actor.Position.Y = 255.9F; } if (actor.Position.X < 0) { actor.Position.X = 0.1F; } else if (actor.Position.X > 256) { actor.Position.X = 255.9F; } float height = _heightMap[(int)actor.Position.Y * 256 + (int)actor.Position.X] + 1.2f; if (actor.Flying) { if (actor.Position.Z + (actor.Velocity.Z * timeStep) < _heightMap[(int)actor.Position.Y * 256 + (int)actor.Position.X] + 2) { actor.Position.Z = height; actor.Velocity.Z = 0; } else { actor.Position.Z = actor.Position.Z + (actor.Velocity.Z * timeStep); } } else { actor.Position.Z = height; actor.Velocity.Z = 0; } } } public override void GetResults() { } public override bool IsThreaded { get { return (false); // for now we won't be multithreaded } } public override void SetTerrain(float[] heightMap) { this._heightMap = heightMap; } public override void DeleteTerrain() { } } public class BasicActor : PhysicsActor { private PhysicsVector _position; private PhysicsVector _velocity; private PhysicsVector _acceleration; private bool flying; public BasicActor() { _velocity = new PhysicsVector(); _position = new PhysicsVector(); _acceleration = new PhysicsVector(); } public override bool Flying { get { return flying; } set { flying = value; } } public override PhysicsVector Position { get { return _position; } set { _position = value; } } public override PhysicsVector Size { get { return new PhysicsVector(0, 0, 0); } set { } } public override PhysicsVector Velocity { get { return _velocity; } set { _velocity = value; } } public override Quaternion Orientation { get { return Quaternion.Identity; } set { } } public override PhysicsVector Acceleration { get { return _acceleration; } } public override bool Kinematic { get { return true; } set { } } public void SetAcceleration(PhysicsVector accel) { this._acceleration = accel; } public override void AddForce(PhysicsVector force) { } public override void SetMomentum(PhysicsVector momentum) { } } }