OnTriggerStay instead of input

Question

Is there a way I can change the "if(Input.GetMouseButton(0))" to, onTriggerStay? Basically I want one animation to play on triggerstay, and onTriggerExit I want the second animation to play. Ex: A char walking into a sphere collider for the trigger? Not exactly sure if a player/char should be called somewhere

     void Update () 
     {
         if(Input.GetMouseButton(0))
         {
             Ray ray = Camera.mainCamera.ScreenPointToRay(Input.mousePosition);
             RaycastHit rayCastHit;
             
             if(Physics.Raycast(ray.origin, ray.direction, out rayCastHit, Mathf.Infinity))
             {
                 Monster monster = rayCastHit.transform.GetComponent<Monster>();
                 if(monster)
                 {
                     monster.PlayMonsterAnim();
                 }
             }
         }
     }

T$$anonymous$$s the anim.script

     private int m_LastIndex;
 
     public void PlayMonsterAnim () 
     {
         if(!animation.isPlaying)
         {
             if(m_LastIndex == 0)
             {    
                 animation.Play("moveOut");
                 m_LastIndex = 1;    
             }
 
             else 
             {
                 animation.Play("moveIn");
                 m_LastIndex = 0;
             }
         }
     }

Answer 1

Best Answer

Answer by Mmmpies · Mar 09, 2015 at 10:19 AM

OnTriggerStay is an overhead all you need to do is set a bool with OnTriggerEnter to True and OnTriggerExit to False.

 private bool IveBeenTriggered = false;
 
 void OnTriggerEnter(Collider other)
 {
     IveBeenTriggered = true;
 }
 
 void OnTriggerExit(Collider other)
 {
     IveBeenTriggered = false;
 }
 
 // Then where you want your animation to play:
 
 if(IveBeenTriggered && !animation.isPlaying("moveIn"))
 {
     animation.Play("moveIn");
 }
 else if (!animation.isPlaying("moveOut")
 {
     animation.Play("moveOut");
 }

Although it's not really clear what triggers the animation currently anyt$$anonymous$$ng that enters that collider will.

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Ouija · Mar 09, 2015 at 06:57 PM 0

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Hey man sorry for the late reply, had to sleep lol. I am wondering where the animation should be called. Update perhaps? i asked because the "monster" isnt activated until you click on another game object. And I want the monster to pop out when the player walks near. Would using update be proper? or will that be using unneeded resources?

Ouija · Mar 09, 2015 at 07:07 PM 0

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im getting the error, " Unexpected symbol - line 20" when I put it in update, so, i guess not hah

Mmmpies · Mar 09, 2015 at 07:10 PM 0

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Kinda depends on what you're doing with the animation but if you just want the moveIn animation to play once when OnTriggerEnters you could just put it in the trigger and put the moveOut in the OnTriggerExit. No need for the bool then.

Or, if you want to check every frame you could put it in Update if that's easier and check that bool.

It's Unity so there's always 10's if not 100's of ways of doing things.

Chances are just playing the animation in the OnTriggerEnter/Exit will be good enough but depends on animation looping and what you want to do when the animation ends for either one.

Mmmpies · Mar 09, 2015 at 08:24 PM 1

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Glad it helped @Ouija and no problem, still learning loads of stuff on here myself so maybe 1/2 a year to a year ahead of you. Gets easier doing simple stuff but man it's a big subject.

Mmmpies · Mar 10, 2015 at 06:06 PM 1

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OK, sorry for the late response and my next might not be too fast either, but are you setting this up to use the animation to move the character out and back in?

It can be done that way so you effectively end up with a cuckoo clock type effect, say you had a cube in a cave that when the trigger Enters animates out and when the trigger exits goes back in.

But, if you are using animations like this, there are better ways. I'll see if I can setup a test scene later with some free assets to show you a simple State Machine but you really want to gen up on Mecanim as it's ideal for easy state machines.

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Answer 2

Answer by kevinspawner · Mar 09, 2015 at 09:20 AM

You can create a triggerstay and trigger exit function and use bool to switch between the animation in the trigger function.

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Ouija · Mar 09, 2015 at 09:43 AM 0

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I wrote this, is it close to what you were talking about? if so, i'm still unsure how to set up the ontriggerstay /exit tho lol

  public void PlayMonsterAnim (bool something) 
      {
  
          if(something) {
  
          if(!animation.isPlaying)
          {
              if(m_LastIndex == 0)
              {    
                  animation.Play("moveIn");
                  m_LastIndex = 1;    
              }
  
              else 
              {
                  animation.Play("moveOut");
                  m_LastIndex = 0;
              }
          }
      }
  }

OnTriggerStay instead of input

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