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287
Assets/Dreamteck/Splines/Components/SplineFollower.cs
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287
Assets/Dreamteck/Splines/Components/SplineFollower.cs
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using UnityEngine;
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using UnityEngine.Events;
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using System.Collections;
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using System.Collections.Generic;
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namespace Dreamteck.Splines
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{
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public delegate void SplineReachHandler();
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[AddComponentMenu("Dreamteck/Splines/Spline Follower")]
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public class SplineFollower : SplineTracer
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{
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public enum FollowMode { Uniform, Time }
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public enum Wrap { Default, Loop, PingPong }
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[HideInInspector]
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public Wrap wrapMode = Wrap.Default;
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[HideInInspector]
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public FollowMode followMode = FollowMode.Uniform;
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[HideInInspector]
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public bool autoStartPosition = false;
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[HideInInspector]
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public bool follow = true;
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/// <summary>
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/// Used when follow mode is set to Uniform. Defines the speed of the follower
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/// </summary>
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public float followSpeed
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{
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get { return _followSpeed; }
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set
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{
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if (_followSpeed != value)
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{
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if (value < 0f) value = 0f;
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_followSpeed = value;
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}
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}
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}
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public double startPosition
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{
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get { return _startPosition; }
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set
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{
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if(value != _startPosition)
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{
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_startPosition = DMath.Clamp01(value);
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if(!followStarted) SetPercent(_startPosition);
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}
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}
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}
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/// <summary>
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/// Used when follow mode is set to Time. Defines how much time it takes for the follower to travel through the path
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/// </summary>
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public float followDuration
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{
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get { return _followDuration; }
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set
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{
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if (_followDuration != value)
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{
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if (value < 0f) value = 0f;
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_followDuration = value;
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}
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}
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}
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public event SplineReachHandler onEndReached;
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public event SplineReachHandler onBeginningReached;
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[SerializeField]
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[HideInInspector]
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private float _followSpeed = 1f;
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[SerializeField]
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[HideInInspector]
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private float _followDuration = 1f;
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[SerializeField]
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[HideInInspector]
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[Range(0f, 1f)]
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private double _startPosition = 0.0;
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private double lastClippedPercent = -1.0;
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private bool followStarted = false;
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#if UNITY_EDITOR
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public bool editorSetPosition = true;
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#endif
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protected override void Start()
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{
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base.Start();
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if (follow && autoStartPosition) SetPercent(spline.Project(GetTransform().position).percent);
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}
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protected override void LateRun()
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{
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base.LateRun();
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#if UNITY_EDITOR
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if (!Application.isPlaying) return;
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#endif
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if (follow) Follow();
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}
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protected override void PostBuild()
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{
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base.PostBuild();
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if (sampleCount == 0) return;
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Evaluate(_result.percent, _result);
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if (follow && !autoStartPosition) ApplyMotion();
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}
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void Follow()
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{
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if (!followStarted)
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{
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if (autoStartPosition)
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{
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Project(GetTransform().position, evalResult);
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SetPercent(evalResult.percent);
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}
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else SetPercent(_startPosition);
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}
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followStarted = true;
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switch (followMode)
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{
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case FollowMode.Uniform: Move(Time.deltaTime * _followSpeed); break;
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case FollowMode.Time:
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if(_followDuration == 0.0) Move(0.0);
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else Move((double)Time.deltaTime / _followDuration);
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break;
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}
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}
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public void Restart(double startPosition = 0.0)
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{
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followStarted = false;
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SetPercent(startPosition);
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}
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public override void SetPercent(double percent, bool checkTriggers = false, bool handleJuncitons = false)
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{
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base.SetPercent(percent, checkTriggers, handleJuncitons);
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lastClippedPercent = percent;
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}
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public override void SetDistance(float distance, bool checkTriggers = false, bool handleJuncitons = false)
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{
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base.SetDistance(distance, checkTriggers, handleJuncitons);
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lastClippedPercent = ClipPercent(_result.percent);
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if (samplesAreLooped && clipFrom == clipTo && distance > 0f && lastClippedPercent == 0.0) lastClippedPercent = 1.0;
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}
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public void Move(double percent)
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{
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if(percent == 0.0) return;
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if (sampleCount <= 1)
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{
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if (sampleCount == 1)
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{
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_result.CopyFrom(GetSampleRaw(0));
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ApplyMotion();
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}
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return;
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}
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Evaluate(_result.percent, _result);
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double startPercent = _result.percent;
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if (wrapMode == Wrap.Default && lastClippedPercent >= 1.0 && startPercent == 0.0) startPercent = 1.0;
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double p = startPercent + (_direction == Spline.Direction.Forward ? percent : -percent);
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bool callOnEndReached = false, callOnBeginningReached = false;
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lastClippedPercent = p;
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if(_direction == Spline.Direction.Forward && p >= 1.0)
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{
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if (onEndReached != null && startPercent < 1.0) callOnEndReached = true;
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switch (wrapMode)
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{
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case Wrap.Default:
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p = 1.0;
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break;
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case Wrap.Loop:
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CheckTriggers(startPercent, 1.0);
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HandleJunctions(startPercent, 1.0);
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while (p > 1.0) p -= 1.0;
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startPercent = 0.0;
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break;
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case Wrap.PingPong:
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p = DMath.Clamp01(1.0-(p-1.0));
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startPercent = 1.0;
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_direction = Spline.Direction.Backward;
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break;
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}
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} else if(_direction == Spline.Direction.Backward && p <= 0.0)
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{
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if (onBeginningReached != null && startPercent > 0.0) callOnBeginningReached = true;
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switch (wrapMode)
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{
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case Wrap.Default:
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p = 0.0;
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break;
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case Wrap.Loop:
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CheckTriggers(startPercent, 0.0);
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HandleJunctions(startPercent, 0.0);
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while (p < 0.0) p += 1.0;
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startPercent = 1.0;
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break;
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case Wrap.PingPong:
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p = DMath.Clamp01(-p);
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startPercent = 0.0;
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_direction = Spline.Direction.Forward;
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break;
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}
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}
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CheckTriggers(startPercent, p);
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Evaluate(p, _result);
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ApplyMotion();
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if (callOnEndReached) onEndReached();
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else if (callOnBeginningReached) onBeginningReached();
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InvokeTriggers();
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HandleJunctions(startPercent, p);
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}
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public void Move(float distance)
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{
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bool endReached = false, beginningReached = false;
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float moved = 0f;
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double startPercent = _result.percent;
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_result.percent = Travel(_result.percent, distance, _direction, out moved);
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if (startPercent != _result.percent)
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{
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CheckTriggers(startPercent, _result.percent);
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HandleJunctions(startPercent, _result.percent);
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}
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if (moved < distance)
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{
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if(direction == Spline.Direction.Forward)
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{
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if(_result.percent >= 1.0)
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{
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switch (wrapMode)
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{
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case Wrap.Loop:
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_result.percent = Travel(0.0, distance - moved, _direction, out moved);
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CheckTriggers(0.0, _result.percent);
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HandleJunctions(0.0, _result.percent);
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break;
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case Wrap.PingPong:
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_direction = Spline.Direction.Backward;
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_result.percent = Travel(1.0, distance - moved, _direction, out moved);
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CheckTriggers(1.0, _result.percent);
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HandleJunctions(1.0, _result.percent);
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break;
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}
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if (startPercent < _result.percent) endReached = true;
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}
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} else
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{
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if(_result.percent <= 0.0)
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{
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switch (wrapMode)
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{
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case Wrap.Loop:
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_result.percent = Travel(1.0, distance - moved, _direction, out moved);
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CheckTriggers(1.0, _result.percent);
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HandleJunctions(1.0, _result.percent);
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break;
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case Wrap.PingPong:
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_direction = Spline.Direction.Forward;
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_result.percent = Travel(0.0, distance - moved, _direction, out moved);
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CheckTriggers(0.0, _result.percent);
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HandleJunctions(0.0, _result.percent);
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break;
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}
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if (startPercent > _result.percent) beginningReached = true;
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}
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}
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}
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Evaluate(_result.percent, _result);
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ApplyMotion();
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if (endReached && onEndReached != null) onEndReached();
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else if (beginningReached && onBeginningReached != null) onBeginningReached();
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InvokeTriggers();
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}
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}
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}
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