Light

struct v2f
{
    float4 ScreenPos;
    float3 FarLeftUp;
    float FarRightUpX;
    float FarLeftDownY;
    float4 Position :POSITION;
    float2 UV;
};

v2f vmain(uniform float4x4 WorldViewProj,uniform float3 VertexFarLeftUp,float4 Position:POSITION,float2 UV:TEXCOORD0)
{
    v2f OUT;
    OUT.ScreenPos=mul(WorldViewProj,Position);
    OUT.Position=OUT.ScreenPos;
    OUT.FarLeftUp=VertexFarLeftUp;
    OUT.FarLeftDownY=-OUT.FarLeftUp.y;
    OUT.FarRightUpX=-OUT.FarLeftUp.x;
    OUT.UV=UV;


    return OUT;
}