triggering 3DText by collision

Question

Hello Y'all

here is a Text Game:

I have 3DText sandwiched between 2 Planes (1&2)

I made it into a prefab and will line a few of them up like dominos for a Camera to move through on a path ...So words appear as you scroll forward along the Z Axis Triggered by colliding with the Planes (fade in & out the Text based on a boolean)

but I am having problems with the semantics of the .js code that I am attaching to the Prefab

 #pragma strict
 
 
 // var to access Text mesh
 var myText : TextMesh;
 //switch text Mesh on and off
 var mySwitch : boolean = false;
 
 
 
 function Start () {
 }
 
 // Fade in myText
 function fadeIn () {
 Fade.use.Alpha(myText.renderer.material, 0.0, 1.0, 1.0, EaseType.In);
 }
 
 // Fade out myText
 function fadeOut () {
 Fade.use.Alpha(myText.renderer.material, 1.0, 0.0, 1.0, EaseType.Out);
 }
 
 
 
 //when Camera(or FPC) collides with Plane_1
 // Fade in or out depending on switch
 function onCollision ("plane_1") {
     if mySwitch = false {
         fadeIn;
         mySwitch = true;
     }
     else mySwitch = true {
         fadeOut;
         mySwitch = false;
     }
 }    
     
 //when Camera(or FPC) collides with Plane_2
 // Fade in or out depending on switch    
 function onCollision ("plane_2") {
     if mySwitch = false {
         fadeIn;
         mySwitch = true;
     }
     else mySwitch = true {
         fadeOut;
         mySwitch = false; 
     }
 }

Any help is greatly appreciated !!

~be

Answer 1

Hey Landem Thank you So much for your time, my original way of thinking was problematic

I found and manipulated a script that allows me only to work with the text based on Position

See below:

 #pragma strict
  
     var fadeIn : boolean;
     var fadeOut : boolean;
     var fadeSpeed : float = 0.01;
     var minAlpha : float = 0.0;
     var maxAlpha : float = 1.0;
     var minDistance = 3;
     var target : Transform;
     var myTransform : Transform;
  
     function Awake()
     {
     myTransform = transform;
 }
  
     function Start()
     {
  
     target = GameObject.FindWithTag("Player").transform;
  
     }
  
     function Update()
     {
  
     if(fadeIn && !fadeOut)
     FadeIn ();
  
     if(fadeOut && !fadeIn)
     FadeOut ();
  
     if(renderer.material.color.a <= minAlpha)
     {
     fadeOut = false;
     if(Vector3.Distance(myTransform.position, target.position) < minDistance)
     {
     fadeIn = true;
     }
     }
  
     if(renderer.material.color.a >= maxAlpha)
     {
     fadeIn = false;
     if(Vector3.Distance(myTransform.position, target.position) > minDistance)
     {
     fadeOut = true;
     }
     }
     }
  
     function FadeIn()
     {
     renderer.material.color.a += fadeSpeed;
     }
  
     function FadeOut()
     {
     renderer.material.color.a -= fadeSpeed;
     }

Answer 2

Answer by Landern · Jun 20, 2014 at 12:27 PM

Add a collider to the 3d text.

Check for collision, in the case below it's OnCollisionEnter, but you can check for other states.

 #pragma strict
  
 // var to access Text mesh
 var myText : TextMesh;
 //switch text Mesh on and off
 var mySwitch : boolean = false;
  
 function Start () {
 }
  
 // Fade in myText
 function fadeIn () {
     Fade.use.Alpha(myText.renderer.material, 0.0, 1.0, 1.0, EaseType.In);
 }
  
 // Fade out myText
 function fadeOut () {
     Fade.use.Alpha(myText.renderer.material, 1.0, 0.0, 1.0, EaseType.Out);
 }
  
 function OnCollisionEnter(collision : Collision) {
     if (collision.name = "plane_2" || collision.name == "plane_1") {
         if (mySwitch == false) { // Could also evaluate !mySwitch
             fadeIn();
             mySwitch = true;
         } else { 
             fadeOut();
             mySwitch = false; 
         }
     }
 }

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Bentoon · Jun 20, 2014 at 01:50 PM 0

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Thank you, i like the compressed code, but I can't run it - it generates a bunch of errors to console!

: o

see Picture

screen shot 2014-06-20 at 9.47.45 am.png (51.8 kB)

Landern · Jun 20, 2014 at 01:53 PM 0

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Ahh, i didn't catch you wrote your if statements incorrectly, fixed, damnit and forgot your parenthesis when calling fadeIn and fadeOut...

Bentoon · Jun 20, 2014 at 07:41 PM 0

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Lander Thank you

It's getting closer, but there are still problems with line 22 that's not letting me compile:

 if (collision.name = "plane_2" || collision.name == "plane_1") {

see Pict

Thanks so much for your time!

~be

screen shot 2014-06-20 at 3.37.23 pm.png (25.1 kB)

triggering 3DText by collision

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