Modifying scroll texture

Question

Hi.

How can I modify the scroll script so that it scrolls the texture everytime a button is pressed for one second for example and then stops? The way I tried it only plays it on some frames doesn't play the whole scrolling like it is without the Input.GetKeyDown. Basically, I want to be able to play with it, how much time it will scroll, then stop? Thanks.

 // Scroll main texture based on time
 var scrollSpeed : float = 0.5;
 
 function Update() {
     
     if(Input.GetKeyDown ("5"))
     {
     
     var offset : float = Time.time * scrollSpeed;
     renderer.material.mainTextureOffset = Vector2 (offset, 0);
 }
 }

Answer 1

Best Answer

Answer by aldonaletto · Jul 31, 2011 at 04:10 PM

It can be done with some modification of your original script. I forced the offset value to be modulo 1 in order to avoid a well known bug with huge offsets:

// Scroll main texture based on time var scrollSpeed : float = 0.5; var scrollTime : float = 1; // scroll duration in seconds private var endScroll: float = 0; private var offset: float = 0; // offset now is permanent instead of temporary

function Update() {

 if(Input.GetKeyDown ("5"))
 {  // set end scrolling time
     endScroll = Time.time + scrollTime;
 }
 if (Time.time < endScroll)
 {
     offset += Time.deltaTime * scrollSpeed; 
     // use offset modulo 1 to avoid a known problem with big offsets
     renderer.material.mainTextureOffset = Vector2 (offset % 1, 0);
 }

}

EDITED: Ok, I got it: the scroll started at random positions because it was based on Time.time. I edited the script to scroll after the last position: the offset variable was moved out of the function to become permanent, not temporary, so it can "remember" the previous position.

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TheKnight · Jul 31, 2011 at 04:23 PM 0

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Yeah, but still the whole scroll doesn't go it stops at some frame.

aldonaletto · Jul 31, 2011 at 05:17 PM 0

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I suppose I've got it: the texture was starting at random positions because it was based on Time.time. I edited my answer to make it start at the last position.

TheKnight · Jul 31, 2011 at 09:45 PM 0

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Actually the scroll time needs to be set to 2 so that the whole cycle is completed. Anyway, this is what I wanted thank you for all the amaizing work and help you are giving on every post. I just can't figure out why I can't vote up your post. I am most thankful for your kind help. Cheers and all the best.

shakac · Apr 02, 2014 at 06:04 AM 0

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OH $$anonymous$$Y GOD Aldonaletto you are boss.i had problem of big texture offset.from your answer i got solution.you saved my whole week. thank you very much.

Modifying scroll texture

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