Open and close doors by pressing 'E'

Question

Hey,

I have this structure of code inside an update function:

 if (Input.GetKey(KeyCode.E)){
             Pressed = true;
         }
 
         //rotate
         if (Pressed == true) 
         {
             Slerpfunction 
             //print("End Reached");
             Pressed = false;    
         }
 
         //rotate back
         if (Pressed == true) 
         {
             Slerpfunction
             //print("End Reached");
             Pressed = false;
         }
 }

I know that this won't work, but how can I make it so that when I press 'e' it rotates, then when the rotation is completed and I press 'e' again, it rotates back, and then when I press 'e' again, it rotates again and so on. Thx!

Answer 1

Best Answer

Answer by $$anonymous$$ · May 15, 2015 at 04:22 PM

Here is your code, I used Quaternion.Lerp() instead of Slerp to make it simpler but you can replace that code with yours.

 private bool Pressed;
     private int State;
 
     private Quaternion EndRot1, EndRot2;
 
     private void Start()
     {
         EndRot1 = Quaternion.Euler(0, 90, 0); // Could be also set from the Inspector
         EndRot2 = Quaternion.identity;
     }
 
     private void Update()
     {
         if (Input.GetKeyDown(KeyCode.E))
             Pressed = true;
 
         if (Pressed) // Rotation
         {
             if (transform.rotation == (State == 0 ? EndRot1 : EndRot2)) // Did the rotation end?
             {
                 State ^= 1; // Inverts "State" from 0 to 1 and reverse
                 Pressed = false;
             } // Slerp Method Here
             else this.transform.rotation = Quaternion.Lerp(transform.rotation, State == 0 ? EndRot1 : EndRot2, Time.deltaTime * 5);
         }
     }

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alexanderameye · May 23, 2015 at 02:10 PM 0

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hey I'll take a look at this, haven't got time yet though, thanks for answering!

$$anonymous$$ · May 23, 2015 at 04:19 PM 1

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sure let me know if it was working

alexanderameye · May 23, 2015 at 06:53 PM 0

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hey, just a question, what does the ^= operator do?

alexanderameye · May 23, 2015 at 06:58 PM 0

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and the comparison with the question mark means:

if state == 0 --> rotation = Endrot1 ////// if state == 1 --> rotation = Endrot2

$$anonymous$$ · May 23, 2015 at 07:40 PM 1

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If you define INT variable, C# automaticly creates a 'safe code' where it assigns 0 to value types and NULL to reference types automaticly so you dont have to do it but you can if you want.

x ^= 1 operator simply swaps 0 and 1 value, if you have 1, it negates it to 0 and reverse over an over again :)

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Answer 2

Another way is Vector3.Lerp .. But it's not the correct way .. ;)

 #pragma strict
 
 var openTime : float;
 var openPosition : Vector3;
 
 private var originalRotation : Vector3;
 private var targetRotation : Vector3;
 private var originalTime : float;
 private var originalOpenTime : float;
 private var z : int;
 
 function Update ()
 {
     if (Input.GetKeyDown ("e"))
     {
         RotateObject();
     }
 }
 
 function RotateObject ()
 {
     z = (z % 2) + 1;
     if(z == 1)
     {
         originalRotation = transform.localRotation.eulerAngles;
         targetRotation = transform.localRotation.eulerAngles + openPosition;
         originalOpenTime = openTime;
 
         while (openTime > 0.0f)
         {
             openTime -= Time.deltaTime;
             transform.localRotation.eulerAngles = Vector3.Lerp(targetRotation, originalRotation, openTime / originalOpenTime);
             yield;
         }
         openTime = originalOpenTime;
 
     }else{
 
         originalRotation = transform.localRotation.eulerAngles;
         targetRotation = transform.localRotation.eulerAngles - openPosition;
         originalOpenTime = openTime;
 
         while (openTime > 0.0f)
         {
             openTime -= Time.deltaTime;
             transform.localRotation.eulerAngles = Vector3.Lerp(targetRotation, originalRotation, openTime / originalOpenTime);
             yield;
         }
         openTime = originalOpenTime;
     }
 }

Open and close doors by pressing 'E'

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