koobas.hobune.stream
Return an object's position and rotation to what it was a certain amount of time ago
I have an object that is moved by following the player's mouse position. After a certain event I need the object to return to it's prior position/rotation from a certain amount of time ago. I know to do this I probably need to constantly keep track of the object's transform somehow. So far I have this:
public Transform earlierTransform;
public float waitTime = 2f;
void Update () {
StartCoroutine (SaveEarlierTransform ());
if (Input.GetKeyDown (KeyCode.Space)) {
//set position and rotation equal to what it was earlier
transform.position = earlierTransform.position;
transform.rotation = earlierTransform.rotation;
}
}
IEnumerator SaveEarlierTransform () {
yield return new WaitForSeconds (waitTime);
earlierTransform = transform;
}
// reference the object in question
Public GameObject myObject;
// reference object's X, Y, Z values
public float initialPositionX;
public float initialPositionY;
public float initialPositionZ;
void Start()
{
// set the initial position of myObject for X, Y and Z
initialPositionX = myObject.tranform.position.x;
initialPositionY = myObject.tranform.position.y;
initialPositionZ = myObject.tranform.position.z;
}
// call this method when you want to return the object to its original position
public void MoveObjectBack()
{
// move it back to its initial position
myObject.transform.position = new Vector3(initialPositionX, initialPositionY, initialPositionZ);
}
Depending on how accurate you want the position or rotation to be, you can choose to store the object's rotation and transform every few seconds or less.
public float delayBetweenRecords; // Delay between storing positions and rotation
public float timeBeforePresent; // Amount of time to jump back
public bool recordCheck; // If false, we stop recording positions
private Vector3 pastPosition;
private Vector3 pastRotation;
private IEnumerator saveRecord; // Reference to our coroutine
void Start() {
Invoke("SaveRecordHandler", timeBeforePresent);
}
void Update() {
if (Input.GetKeyDown (KeyCode.Space)) {
transform.position = pastPosition;
transform.rotation = pastRotation;
}
}
private void SaveRecordHandler() {
// If coroutine is already running, we stop it
if (saveRecord != null) {
StopCoroutine(saveRecord);
saveRecord = null;
}
if (recordCheck) {
saveRecord = SaveRecord();
StartCoroutine(saveRecord);
}
{
private IEnumerator SaveRecord() {
while (recordCheck) {
pastPosition = transform.position;
pastRotation = transform.rotation;
yield return new WaitForRealtimeSeconds(delayBetweenRecords);
}
// Reset variable
saveRecord = null;
}
