UNITY - Outline

아웃라인 쉐이더

 

 

Shader "Custom/Outline" 
{
	Properties 
	{
		_Color("Main color", Color)=(0.5,0.5,0.5,1)
		_OutlineColor("OutlineColor",Color)=(0,0,0,1)
		_Outline("Outline Width",Range(0.0,0.03) ) =0.009
	}
// Blend SrcAlpha OneMinusSrcAlpha     // Alpha blending
// Blend One One                       // Additive
// Blend OneMinusDstColor One          // Soft Additive
// Blend DstColor Zero                 // Multiplicative
// Blend DstColor SrcColor             // 2x Multiplicative

  SubShader 
  {

  Tags { "RenderType"="Opaque" }
                           

	pass
	{
          Name "OUTLINE"
          CGPROGRAM
          #pragma vertex vert
          #pragma fragment frag
          #include "UnityCG.cginc"

	    uniform float _Outline;
	    uniform float4 _OutlineColor;

        struct vI
        {
          float4 mPosition : POSITION;
          float3 mNormal : NORMAL;
        };

        struct vO
        {
          float4 mPosition : POSITION;
          float4 mcolor : COLOR;
        };

        vO vert(vI i)
        {
          vO o;
          //오브젝트 공간에서 계산
          o.mPosition.xyz=i.mPosition.xyz + i.mNormal*_Outline;
          o.mPosition.w=i.mPosition.w;
          o.mPosition=mul(UNITY_MATRIX_MVP,o.mPosition);
          //투영공간에서 계산 ------------------------------------------------ iso 뷰모드에서는 라인이 안보임, perspect 뷰에서는  거리에 따라 라인두께의 변화가 심함.
          // o.mPosition=mul(UNITY_MATRIX_MVP, i.mPosition);
          // float3 norm=mul((float3x3)UNITY_MATRIX_IT_MV,i.mNormal);
          // norm.x *= UNITY_MATRIX_P[0][0];    //행렬의 y위치
          // norm.y *= UNITY_MATRIX_P[1][1]; //행렬의 y위치
          // float2 offest=TransformViewToProjection(norm.xy);     //위의 행렬위치 대신 쓸수있는것 
          // o.mPosition.xy +=offest*o.mPosition.z*_Outline; 
          o.mcolor=_OutlineColor;
            return o;
        }

        float4 frag(vO i) : COLOR
        {
            return i.mcolor;
        }

        ENDCG
        Cull front
        ZWrite off
    }

    pass
    {
          Name "BASE"
          CGPROGRAM
          #pragma vertex vert
          #pragma fragment frag
          // #include "UnityCG.cginc"
          float4 _Color;
          struct vI
        {
          float4 mPosition : POSITION;
          //float3 mNormal : NORMAL;
        };

        struct vO
        {
          float4 mPosition : POSITION;
          float4 mcolor : COLOR;
        };

        vO vert(vI i)
        {
          vO o;
          o.mPosition=mul(UNITY_MATRIX_MVP, i.mPosition);
          o.mcolor=_Color;
          return o;
        }

        float4 frag(vO i) : COLOR
        {
            return i.mcolor;
        }
        ENDCG
        Cull Back
        ZWrite on
    } 
  }

}