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MovementCreatorController.cs
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using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEditor;
using UnityEngine;
using UnityEngine.UI;
public class MovementCreatorController : MonoBehaviour {
public GameObject sword;
public GameObject label;
private GameObject startSword;
private GameObject endSword;
private string movementName;
private int movementCount;
private Queue<Transform> steadyChecker;
private Queue<Transform> recordingSampler;
private float recordStartTime;
public class Record
{
public Vector3 position;
public Quaternion rotation;
public float time;
public Record(Vector3 v, Quaternion q, float t)
{
position = v;
rotation = q;
time = t;
}
}
private Queue<Record> officialRecording;
private Queue<Queue<Record>> officialRecordings;
private bool firstPassStarted;
private bool firstPassFinished;
private bool extraPassStarted;
private bool extraPassFinished;
private int steadyFrameCount;
private int steadyDegreeVariation;
private int steadyPositionVariation;
private int recordingSampleKeepCount;
private int recordingSampleDiscardCount;
public void Awake()
{
steadyChecker = new Queue<Transform>();
recordingSampler = new Queue<Transform>();
officialRecording = new Queue<Record>();
officialRecordings = new Queue<Queue<Record>>();
if (string.IsNullOrEmpty(PlayerPrefs.GetString("name")))
movementName = "noInputName";
else
movementName = PlayerPrefs.GetString("name");
movementCount = 0;
firstPassStarted = false;
firstPassFinished = false;
extraPassStarted = false;
extraPassFinished = false;
//-- Here lie the magic numbers --//
//Frames before potentially "steady"
steadyFrameCount = Application.targetFrameRate * 2;
//Acceptable variation in degrees before "steady"
steadyDegreeVariation = 10;
//Acceptable variation in position before "steady"
steadyPositionVariation = 10;
//Trailing position tracker count for averaging sword position
recordingSampleKeepCount = 30;
//Number of trailing position tracking points to discard upon successful averaging
recordingSampleDiscardCount = 10;
//Cap the engine at 60 frames per second, to allow better use of Update()
Application.targetFrameRate = 60;
}
// Update is called once per frame
void Update () {
if (Input.GetKeyDown("escape"))
completeCreationAndExit();
bool stable = isStable();
if(!firstPassStarted)
{
if(stable)
{
firstPassStarted = true;
recordStartTime = Time.time;
Text txt = label.GetComponent<Text>();
txt.text = "Recording";
//Render start position
startSword = Instantiate(sword);
startSword.name = "startSword";
startSword.AddComponent<GhostSwordController>().sword = startSword;
}
} else
{
if(!firstPassFinished)
{
//This is where first recording happens
if (!stable)
{
recordingSampler.Enqueue(sword.transform);
if(recordingSampler.Count >= recordingSampleKeepCount)
{
processMovementToRecord();
}
} else
{
recordingSampler.Clear();
firstPassFinished = true;
persistMovement();
Text txt = label.GetComponent<Text>();
txt.text = "Movement Locked";
//Render end position
endSword = Instantiate(sword);
endSword.name = "endSword";
endSword.AddComponent<GhostSwordController>().sword = endSword;
}
} else
{
if (!extraPassStarted)
{
//extra pass hasn't started, wait for starting position
if(stable && isAtStartPosition(sword.transform))
{
extraPassStarted = true;
recordStartTime = Time.time;
Text txt = label.GetComponent<Text>();
txt.text = "Movement Locked: Recording Additional Input #" + movementCount;
}
} else
{
//extra pass in progress, record inputs
//if in end position, flip extraPassFinished and tell user
if (!extraPassFinished)
{
if(!stable)
{
recordingSampler.Enqueue(sword.transform);
if (recordingSampler.Count >= recordingSampleKeepCount)
{
processMovementToRecord();
}
} else
{
if (isAtEndPosition(sword.transform))
{
recordingSampler.Clear();
extraPassFinished = true;
Text txt = label.GetComponent<Text>();
txt.text = "Movement Locked: Additional Input #" + movementCount + " Recorded";
persistMovement();
}
}
} else
{
//extra passs finished, reset
extraPassStarted = false;
extraPassFinished = false;
}
}
}
}
}
//Some code from: https://support.unity3d.com/hc/en-us/articles/115000341143-How-do-I-read-and-write-data-from-a-text-file-
private void persistMovement()
{
Queue<Record> duplicateRecording = new Queue<Record>();
foreach (Record r in officialRecording)
{
duplicateRecording.Enqueue(r);
}
officialRecordings.Enqueue(duplicateRecording);
officialRecording.Clear();
movementCount++;
}
private void completeCreationAndExit()
{
float averageTime = 0;
int sampleCount = 0;
//Get average time across all recordings
foreach (Queue<Record> q in officialRecordings)
{
averageTime += q.ToArray()[q.Count - 1].time;
sampleCount++;
}
averageTime = averageTime / sampleCount;
//Standardize all recordings to the sample time
float sampleTime;
foreach (Queue<Record> q in officialRecordings)
{
sampleTime = q.ToArray()[q.Count - 1].time;
foreach (Record r in q)
{
r.time *= (averageTime / sampleTime);
}
}
//Get average number of samples
float averageSamples = 0;
foreach (Queue<Record> q in officialRecordings)
{
averageSamples += q.Count;
}
averageSamples = averageSamples / sampleCount;
int binCount = (int)System.Math.Floor(averageSamples);
float binSize = averageTime / binCount;
int currentBin = 0;
List<Record> toAverage = new List<Record>();
Queue<Record> completedRecords = new Queue<Record>();
while (currentBin * binSize < averageTime)
{
foreach (Queue<Record> q in officialRecordings)
{
foreach (Record r in q)
{
//If the current record lies within the current bin
float currentBinMin = currentBin * binSize;
if (r.time >= currentBinMin && r.time < (currentBinMin + binSize))
{
toAverage.Add(r);
}
}
}
//First bin (t = 0 -> binSize) always comes up empty, but this is without moving test data, this conditional may not be necessary with the proper data
if (toAverage.Count != 0)
{
completedRecords.Enqueue(averageRecord(toAverage.ToArray()));
}
currentBin++;
toAverage.Clear();
}
string path = "Assets/Resources/";
string fullPath = "Assets/Resources/" + movementName + ".txt";
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
StreamWriter writer = new StreamWriter(fullPath, false);
writer.WriteLine(binSize + "," + currentBin);
//Write start postion to file
writer.WriteLine(startSword.transform.position.ToString() + "|" + startSword.transform.rotation.ToString());
//Write end postion to file
writer.WriteLine(endSword.transform.position.ToString() + "|" + endSword.transform.rotation.ToString());
//Write recorded checkpoints to file
while (completedRecords.Count > 0)
{
Record r = completedRecords.Dequeue();
writer.WriteLine(r.position.ToString() + "|" + r.rotation.ToString() + "|" + r.time);
}
writer.Close();
SystemController.StaticLoadLevel("Start Menu");
}
//Return the average record of all the passed in records
Record averageRecord(Record[] records)
{
Vector3[] forPositionAveraging = new Vector3[records.Length];
for (int i = 0; i < records.Length; i++)
{
forPositionAveraging[i] = records[i].position;
}
Vector3 truePosition = getMeanVector(forPositionAveraging);
Quaternion[] forRotationAveraging = new Quaternion[records.Length];
for (int i = 0; i < records.Length; i++)
{
forRotationAveraging[i] = records[i].rotation;
}
Quaternion trueRotation = getMeanQuaternion(forRotationAveraging);
float averageTime = 0;
int count = 0;
for (int i = 0; i < records.Length; i++)
{
averageTime += records[i].time;
count++;
}
return new Record(truePosition, trueRotation, (averageTime/count));
}
//Creates a record based on the last few frames of movement
void processMovementToRecord()
{
//Get average position of last 30 frames
Transform[] sampleArray = recordingSampler.ToArray();
Vector3[] forPositionAveraging = new Vector3[sampleArray.Length];
for (int i = 0; i < sampleArray.Length; i++)
{
forPositionAveraging[i] = sampleArray[i].position;
}
Vector3 truePosition = getMeanVector(forPositionAveraging);
//Get average rotation of last 30 frames
Quaternion[] forRotationAveraging = new Quaternion[sampleArray.Length];
for (int i = 0; i < sampleArray.Length; i++)
{
forRotationAveraging[i] = sampleArray[i].rotation;
}
Quaternion trueRotation = getMeanQuaternion(forRotationAveraging);
while (recordingSampler.Count >= recordingSampleDiscardCount)
{
recordingSampler.Dequeue();
}
//Add the compiled position and rotation to the official recording log
officialRecording.Enqueue(new Record(truePosition, trueRotation, (Time.time - recordStartTime)));
}
//From: https://answers.unity.com/questions/164257/find-the-average-of-10-vectors.html
Vector3 getMeanVector(Vector3[] positions)
{
if (positions.Length == 0)
return Vector3.zero;
float x = 0f;
float y = 0f;
float z = 0f;
foreach (Vector3 pos in positions)
{
x += pos.x;
y += pos.y;
z += pos.z;
}
return new Vector3(x / positions.Length, y / positions.Length, z / positions.Length);
}
bool isAtStartPosition(Transform currentPos)
{
bool atStart = true;
atStart = areTransformsSimilar(startSword.transform, currentPos);
return atStart;
}
bool isAtEndPosition(Transform currentPos)
{
bool atStart = true;
atStart = areTransformsSimilar(endSword.transform, currentPos);
return atStart;
}
bool areTransformsSimilar(Transform t1, Transform t2)
{
bool similar = true;
if (Quaternion.Angle(t1.rotation, t2.rotation) > steadyDegreeVariation)
{
//The angle between some pair of the last steadyFrameCount sword positions is greater than steadyDegreeVariation degrees
similar = false;
}
if (Vector3.Distance(t1.position, t2.position) > steadyPositionVariation)
{
//The distance between some pair of the last steadyFrameCount sword positions is greater than steadyPositionVariation (units unknown)
similar = false;
}
return similar;
}
//Returns true if the sword object has remained mostly stable for the past 30 frames (0.5 seconds at 60fps), will only return true up to once every (steadyFrameCount/framerate) seconds, false otherwise
bool isStable()
{
//Add the current sword location to the steadyChecker
steadyChecker.Enqueue(sword.transform);
//Return false if there aren't enough sample points yet
if (steadyChecker.Count < steadyFrameCount)
return false;
//Assumed true
bool isStable = true;
//remove excess positions if present
while (steadyChecker.Count > steadyFrameCount)
{
steadyChecker.Dequeue();
}
for (int i = 0; i < steadyChecker.Count - 1; i++)
{
for (int j = i + 1; j < steadyChecker.Count; j++)
{
isStable = areTransformsSimilar(steadyChecker.ToArray()[i], steadyChecker.ToArray()[j]);
}
}
if (isStable)
steadyChecker.Clear();
return isStable;
}
public Quaternion getMeanQuaternion(Quaternion[] inputs)
{
Vector4 accumulator = Vector4.zero;
Quaternion first = inputs[0];
Quaternion toReturn = Quaternion.identity;
for(int i = 1; i < inputs.Length; i++)
{
toReturn = AverageQuaternion(ref accumulator, inputs[i], first, i);
}
return toReturn;
}
//From :http://wiki.unity3d.com/index.php/Averaging_Quaternions_and_Vectors
//Get an average (mean) from more then two quaternions (with two, slerp would be used).
//Note: this only works if all the quaternions are relatively close together.
//Usage:
//-Cumulative is an external Vector4 which holds all the added x y z and w components.
//-newRotation is the next rotation to be added to the average pool
//-firstRotation is the first quaternion of the array to be averaged
//-addAmount holds the total amount of quaternions which are currently added
//This function returns the current average quaternion
public static Quaternion AverageQuaternion(ref Vector4 cumulative, Quaternion newRotation, Quaternion firstRotation, int addAmount)
{
float w = 0.0f;
float x = 0.0f;
float y = 0.0f;
float z = 0.0f;
//Before we add the new rotation to the average (mean), we have to check whether the quaternion has to be inverted. Because
//q and -q are the same rotation, but cannot be averaged, we have to make sure they are all the same.
if (!Math3d.AreQuaternionsClose(newRotation, firstRotation))
{
newRotation = Math3d.InverseSignQuaternion(newRotation);
}
//Average the values
float addDet = 1f / (float)addAmount;
cumulative.w += newRotation.w;
w = cumulative.w * addDet;
cumulative.x += newRotation.x;
x = cumulative.x * addDet;
cumulative.y += newRotation.y;
y = cumulative.y * addDet;
cumulative.z += newRotation.z;
z = cumulative.z * addDet;
//note: if speed is an issue, you can skip the normalization step
return NormalizeQuaternion(x, y, z, w);
}
public static Quaternion NormalizeQuaternion(float x, float y, float z, float w)
{
float lengthD = 1.0f / (w * w + x * x + y * y + z * z);
w *= lengthD;
x *= lengthD;
y *= lengthD;
z *= lengthD;
return new Quaternion(x, y, z, w);
}
//Changes the sign of the quaternion components. This is not the same as the inverse.
public static Quaternion InverseSignQuaternion(Quaternion q)
{
return new Quaternion(-q.x, -q.y, -q.z, -q.w);
}
//Returns true if the two input quaternions are close to each other. This can
//be used to check whether or not one of two quaternions which are supposed to
//be very similar but has its component signs reversed (q has the same rotation as
//-q)
public static bool AreQuaternionsClose(Quaternion q1, Quaternion q2)
{
float dot = Quaternion.Dot(q1, q2);
if (dot < 0.0f)
{
return false;
}
else
{
return true;
}
}
}