Unity3D-CG-programming/binormals.shader at master · ParsGameLab/Unity3D-CG-programming · GitHub

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//Debug binormals (called also bitangents)

Shader "Binormals"

{

Subshader

{

Pass

{

CGPROGRAM

#pragma vertex vertex_shader

#pragma fragment pixel_shader

#pragma target 2.0

struct structure

{

float4 vertex : SV_POSITION;

float4 color : COLOR;

};

float3 cross(float3 a, float3 b)

{

return a.yzx*b.zxy-a.zxy*b.yzx;

}

structure vertex_shader (float4 vertex:POSITION,float3 normal:NORMAL,float4 tangent:TANGENT)

{

structure vs;

vs.vertex = UnityObjectToClipPos (vertex);

float3 binormal = cross(normal,tangent.xyz)*tangent.w;

vs.color = float4(binormal*0.5+0.5,1.0);

return vs;

}

float4 pixel_shader (structure ps ) : SV_TARGET

{

return ps.color;

}

ENDCG

}

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