Movement.cs

Siirry tämän tiedoston dokumentaatioon.

#region MIT License
/*
 * Copyright (c) 2009 University of Jyväskylä, Department of Mathematical
 * Information Technology.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#endregion

/*
 * Authors: Tero Jäntti, Tomi Karppinen, Janne Nikkanen.
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Jypeli.GameObjects;

namespace Jypeli
{
    public partial class GameObject
    {
        protected Timer moveTimer = null;
        protected Vector? moveTarget = null;
        protected double moveSpeed;
        protected Action arrivedAction = null;

        private SynchronousList<Oscillator> oscillators = null;

        public virtual void Move( Vector movement )
        {
            Position += movement;
        }

        public override void MoveTo( Vector location, double speed, Action doWhenArrived )
        {
            if ( moveTimer == null )
            {
                moveTimer = new Timer();
                moveTimer.Timeout += MoveToTarget;
                moveTimer.Interval = 0.01;
            }
            else if ( moveTimer.Enabled )
                moveTimer.Stop();

            moveSpeed = speed;
            moveTarget = location;
            arrivedAction = doWhenArrived;
            moveTimer.Start();
        }

        public void StopMoveTo()
        {
            if ( moveTimer != null )
            {
                moveTimer.Stop();
                moveTarget = null;
            }
        }

        protected virtual void MoveToTarget()
        {
            if ( !moveTarget.HasValue )
            {
                moveTimer.Stop();
                return;
            }

            Vector d = moveTarget.Value - AbsolutePosition;
            double vt = moveSpeed * moveTimer.Interval;

            if ( d.Magnitude < vt )
            {
                Vector targetLoc = moveTarget.Value;
                moveTimer.Stop();
                AbsolutePosition = moveTarget.Value;
                moveTarget = null;

                if ( arrivedAction != null )
                    arrivedAction();
            }
            else
            {
                AbsolutePosition += Vector.FromLengthAndAngle( vt, d.Angle );
            }
        }

        private void AssertOscillators()
        {
            if ( oscillators == null )
                oscillators = new SynchronousList<Oscillator>();

            IsUpdated = true;
        }

        public void Oscillate<WaveForm>( Vector axis, double amplitude, double frequency, double phase = 0, double damping = 0 ) where WaveForm : Waveform
        {
            AssertOscillators();

            Waveform waveform = (Waveform)Activator.CreateInstance( typeof( WaveForm ), new object[] { amplitude, frequency, phase, damping } );
            oscillators.Add( new LinearOscillator( this, axis, waveform ) );
        }

        public void Oscillate( Vector axis, double amplitude, double frequency, double phase = 0, double damping = 0 )
        {
            AssertOscillators();

            Waveform waveform = new Waveform.Sine( amplitude, frequency, phase, damping );
            oscillators.Add( new LinearOscillator( this, axis, waveform ) );
        }

        public void OscillateAngle<WaveForm>( double direction, UnlimitedAngle amplitude, double frequency, double damping = 0 ) where WaveForm : Waveform
        {
            AssertOscillators();

            Waveform waveform = (Waveform)Activator.CreateInstance( typeof( WaveForm ), new object[] { amplitude.Radians, frequency, 0, damping } );
            oscillators.Add( new AngularOscillator( this, direction, waveform ) );
        }

        public void OscillateAngle( double direction, UnlimitedAngle amplitude, double frequency, double damping = 0 )
        {
            AssertOscillators();

            Waveform waveform = new Waveform.Sine( amplitude.Radians, frequency, 0, damping );
            oscillators.Add( new AngularOscillator( this, direction, waveform ) );
        }

        public void SetEquilibrium()
        {
            throw new NotImplementedException();
        }

        public void ClearOscillations()
        {
            oscillators = null;
        }

        public virtual void Stop()
        {
            StopMoveTo();
            ClearOscillations();
        }
    }
}