Circular Bar - problem with shader

Question

Hi, I using AlphaCutoff shader to make my life bar circular. Its working half good - the texture disappears but it leaving black solid color be$$anonymous$$nd it. How can I change to draw _BackText instead of just solid black?

Shader:

 Shader "Custom/LifeBar" {
     Properties {
       _MainTex ("Base (RGB) Transparency (A)", 2D) = "" {}
       _BackTex ("Texture", 2D) = "black" {}
       _Cutoff ("Alpha cutoff", Range (0, 1)) = 0.5
     }
     SubShader {
     Tags {"RenderType" = "Transparent" "Queue" = "Transparent" "IgnoreProjector" = "True"}
 
              Pass{
         AlphaTest Greater [_Cutoff]
             Material {
                 Diffuse (1,1,1,1)
                 Ambient (1,1,1,1)
             }
             Lighting On
             SetTexture [_MainTex] { combine texture * primary }
         }
     } 
   }

Script to draw bar:

 if (Event.current.type.Equals(EventType.Repaint))
         {
             mat.SetFloat("_Cutoff", lifePerc);
             Grap$$anonymous$$cs.DrawTexture(new Rect((Screen.width - Screen.width / 6) - 5, (Screen.height - Screen.width / 6) - 5, Screen.width / 6, Screen.width / 6), gradient, mat);
 
         }

Answer 1

Best Answer

Answer by Jona-Marklund · Aug 27, 2013 at 09:11 PM

Provided that you're trying to have the _MainTex be positioned on top of the _BackTex, t$$anonymous$$s should work for you!

 Shader "JM/LifeBar" {
 //Jona Marklund 27th of August 2013
 
     Properties {
       _MainTex ("Base (RGB) Transparency (A)", 2D) = "" {}
       _BackTex ("Texture", 2D) = "black" {}
       _Cutoff ("Alpha cutoff", Range (0, 1)) = 0.5
     }
     SubShader {
     Tags {"RenderType" = "Transparent" "Queue" = "Transparent" "IgnoreProjector" = "True"}
  
           Pass{
        AlphaTest Greater [_Cutoff]
          Material {
           Diffuse (1,1,1,1)
           Ambient (1,1,1,1)
          }
          Lighting On
          SetTexture [_BackTex] { combine texture * primary }
          SetTexture [_MainTex] { combine texture, previous + texture }
        }
     } 
   }

Best Regards Jona

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Answer 2

Answer by $$anonymous$$ · Aug 17, 2013 at 11:14 PM

It hast to do with line 4, replace

 _BackTex ("Texture", 2D) = "black" {}

with

 _BackTex ("Texture", 2D) = "" {}

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legion_44 · Aug 18, 2013 at 10:02 AM 0

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This doesn't do the trick ;/. Still leaving black instead of texture.

legion_44 · Aug 20, 2013 at 01:22 PM 0

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Really nobody know?

Answer 3

Answer by whydoidoit · Aug 20, 2013 at 01:35 PM

Add t$$anonymous$$s to your shader:

 Blend SrcAlpha OneMinusSrcAlpha

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legion_44 · Aug 27, 2013 at 07:04 PM 0

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Hi, its not leaving solid black now but i want it to draw _BackTex instead of black color, not the _MainTex. Sorry for not answering for so long but i was on wacations :). If somebody know what to do please help me please.

legion_44 · Aug 27, 2013 at 08:58 PM 0

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BUMP! - I really need this and i newbie at shaders :(

Circular Bar - problem with shader

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