Need help with this Rotation Script (fixes)

Question

Hello,

I'm making my dashboard and successfully completed the alorithms to rotate my needles.

I wish to rotate them a variable amount of degrees WITHIN 1.5 Seconds.

Is it possible to use the Time class for t$$anonymous$$s?

i don't want my needles jump from position to position, i want them to rotate!

can somebody help me? i didnt find anyt$$anonymous$$ng useful in the scripting reference

EDIT : Script incoming, take cover :O

 var Source : TextAsset;
 
 var ZeigerSpeed : GameObject;
 var ZeigerRPM   : GameObject;
 var ZeigerHitze : GameObject;
 
 
 var DrehungSpeed = 0.0;
 var DrehungRpm = 0.0;
 var DrehungHitze = 0.0;
 
 var DrehungSpeed_alt = 0.0;
 var DrehungRpm_alt = 0.0;
 var DrehungHitze_alt = 0.0;
 
 
 
 
 
 
 
 
 
 
 function Dashboard()
 {
     var lines = Source.text.Split("\n"[0]);
     
     for(var i = 4; i < lines.Length; i++)
     {
         var values = lines[i].Split(";"[0]);
         
         DrehungSpeed = int.Parse(values[4]);
         DrehungRpm = int.Parse(values[8]);
         
         DrehungSpeed = (DrehungSpeed/300.0)*180.0;
         DrehungRpm = (DrehungRpm/8000.0)/240.0;        
         
         
         ZeigerSpeed.transform.Rotate(0,0,DrehungSpeed);
         ZeigerRPM.transform.Rotate(0,0,DrehungRpm);
         
         DrehungSpeed_alt = DrehungSpeed;
         DrehungRpm_alt = DrehungRpm;
         
         
         if(i>4)
         {
             DrehungSpeed = DrehungSpeed - DrehungSpeed_alt;
             DrehungRpm = DrehungRpm - DrehungRpm_alt;
         }
         
         if(DrehungSpeed < DrehungSpeed_alt)
         {
             DrehungSpeed = -(DrehungSpeed_alt - DrehungSpeed);
         }
         
         if(DrehungRpm < DrehungRpm_alt)
         {
             DrehungRpm = -(DrehungRpm_alt - DrehungRpm);
         }
         
         if(DrehungSpeed == DrehungSpeed_alt)
         {
             DrehungSpeed = 0;
         }
         
         if(DrehungRpm == DrehungRpm_alt)
         {
             DrehungRpm = 0;
         }
     }
 }
 
 function Start()
 {
     Dashboard();
 }
 
 function Update(){}

EDIT: Rotation works now, inverting the values properly does not :/ i'm totally out of ideas

Answer 1

Answer by Graham-Dunnett · May 24, 2011 at 01:23 PM

T$$anonymous$$s is just a maths question. At time now your needle is at angle theta1. In time now+1.5 you need your needle to be at angle theta2. So you need to rotate by (theta2-theta1)/1.5 degrees per second. Call t$$anonymous$$s deltaThetaPerSecond.

The Time Class has a member called deltaTime (http://unity3d.com/support/documentation/ScriptReference/Time-deltaTime.html). T$$anonymous$$s is documented as telling you how much time the last frame took to display. So, multiply deltaThetaPerSecond by Time.deltaTime and t$$anonymous$$s tells you how many degrees you need to rotate your needle by in the current frame.

After 1.5 seconds you no longer need to make t$$anonymous$$s change, so, in your Update() function after you have counted 1.5 second have passed just set deltaThetaPerSecond to zero. Now your needle won't rotate any more.

If you happen to get a new speed value inside the 1.5 second period, just re-compute deltaThetaPerSecond from the current angle and the new desired angle.

 var currentAngle = 0.0; // t$$anonymous$$s is the rotation of the needle in degrees
 function lese_datei()
 {
   for (;;) // do your current looping stuff
   {
     //csv reading stuff and compute desiredAngle
     deltaThetaPerSecond = (desiredAngle - currentAngle) / 1.5;
     yield WaitForSeconds(1.5);
   }
 }
 function Update()
 {
   var deltaAngle = deltaThetaPerSecond * Time.deltaTime;
   currentAngle += deltaAngle;
   Umdrehungen.transform.Rotate(0,0,currentAngle);
 }

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biohazard · May 24, 2011 at 01:25 PM 0

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Oh, Hey Graham! Well, i'm not using Update() but i'll edit my Question to make u see the script

Graham-Dunnett ♦♦ · May 24, 2011 at 01:33 PM 0

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Sure, but the problem with the code you posted is you have a yield WaitForSeconds(1.5). This tells the code to not do anything for the next second and a half. If you want something to happen slowly over those 1.5 seconds you'll need to tell Unity what to do. I guess the simplest thing is to use an Update and use your lese_datei() function to compute deltaThetaPerSecond as per my answer. Then you'll make the calls into Umdrehungen.transform.Rotate and Geschwindigkeit.transform.Rotate in Update().

biohazard · May 24, 2011 at 01:36 PM 0

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i don't seem to get it. can you possibly post a little snippet for me to orientate? i've just realized that my code needs logical fixes anyway.

Need help with this Rotation Script (fixes)

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