struct appdata
{
    float4 vertex : POSITION;
};

struct v2f
{
    float4 vertex : SV_POSITION;
    float3 vCamPos : TEXCOORD1;
    float3 vHitPos : TEXCOORD2;
};

struct fragOut
{
    fixed4 col : SV_Target;
    // float depth : SV_Depth;
};

v2f vert (appdata v)
{
    v2f o;
    o.vertex = UnityObjectToClipPos(v.vertex);
#ifdef USE_WORLD_SPACE
    o.vCamPos = _WorldSpaceCameraPos;
    o.vHitPos = mul(unity_ObjectToWorld, v.vertex);
#else
    o.vCamPos = mul(unity_WorldToObject, float4(_WorldSpaceCameraPos, 1));
    o.vHitPos = v.vertex;
#endif
    return o;
}

fragOut frag (v2f i)
{
	fragOut o;
	o.col = 1;
	o.col.r = 0;
	return o;
}

// #define SOME_MAGIC(main_fn) float3 main1()\
// main_fn \

#define SOME_MAGIC(PASS, function_definition) float3 main##PASS() function_definition

#define DO_MAGIC MAIN_FN(1)

// #define SECOND_PASS 1
// #define AA MAIN_FN
// #define BB MAIN_FN


// float3 main2() \
// main_fn

// \
// float3 main2() \
// main_fn\


// #define SECOND_PASS \