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Question by Yog0 · Dec 04, 2013 at 09:23 PM · shaderlerpfade

Help getting shader to fade textures then stop as opposed to Lerp back and forth

Hi all,

Found a shader on the forums that fades between textures, as well as a function that causes the shader to change between the two textures you put in the shader. My question is how would you change the function it causes the shader to transition from texture1 to texture2 and then stop, as opposed to pingponging back to texture1? Thanks.

Shader:

 Shader "Myshaders/ChangeMaterial" {
 
     Properties {
         _Tint ("Tint Color", Color) = (.9, .9, .9, 1.0)
         _TexMat1 ("Base (RGB)", 2D) = "white" {}
         _TexMat2 ("Base (RGB)", 2D) = "white" {}
 
         _Blend ("Blend", Range(0.0,1.0)) = 0.0
     }
     
 Category {
     ZWrite On
     Alphatest Greater 0
     Tags {Queue=Transparent}
     Blend SrcAlpha OneMinusSrcAlpha
     ColorMask RGB
 
 SubShader {
     Pass
     {
             
         Material
         {
             Diffuse [_Tint]
             Ambient [_Tint]
         }
         Lighting On
             
         SetTexture [_TexMat1] { combine texture }
         SetTexture [_TexMat2] { constantColor (0,0,0,[_Blend]) combine texture lerp(constant) previous }
         SetTexture [_TexMat2] { combine previous +- primary, primary }
 
     }
     } 
     
     FallBack " Diffuse", 25
     }
 
 }

Function:

 function Update () 
 {
 
     var lerp = Mathf.PingPong (Time.time, duration) / duration; 
 
     renderer.material.SetFloat( "_Blend", lerp );
 
 
 }
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