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Question by Beennn · Aug 14, 2012 at 07:47 PM · shaderprojector

Problem with simple projection shader

First time messing around with shaders, i've got what im after however the projected texture is projected black, loosing all it's colour.

Here's the shader:

  Shader "Projector Shader" {
        Properties {
           
           _Tex ("Projector", 2D) = "" { TexGen ObjectLinear }
           
        }
     
        Subshader {
           
           Pass {
           
             Blend DstColor Zero 
               
              SetTexture [_Tex] {
              
                 Matrix [_Projector]
                  
              }
           }
        }
     }

What's causing this to happen?

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avatar image Beennn · Aug 27, 2012 at 03:52 PM 0
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Could still use a hand if anyone knows why this is happening.

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Answer by ScroodgeM · Aug 27, 2012 at 07:33 PM

you forgot about falloff the texture where projector should be hided.

  • add this to property:

_FallOff ("FallOff", 2D) = "white" {}
  • add this as second texture block:

SetTexture [_FallOff] {
  constantColor (1,1,1,0)
  combine previous lerp (texture) constant
  Matrix [_ProjectorClip]
}
  • and attach fallof texture (gradient alpha from 1(left) to 0(right))

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avatar image Beennn · Aug 28, 2012 at 05:48 AM 0
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Thank you very much

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