Chao7

const float cPi = 3.14159265; // 3.14159274const float4 ePi = float4(	3.14159e-00,	2.65358e-06,	9.79323e-12,	8.46264e-18);const float getPi_dp24() {    float rPi;    rPi = ePi[3] +          ePi[2] +          ePi[1] +          ePi[0] ;    return rPi;}const float getPi_dp18() {    float rPi;    rPi = ePi[2] +          ePi[1] +          ePi[0] ;    return rPi;}const float getPi_dp12() {    volatile float rPi;    rPi = ePi[1] +          ePi[0] ;    return rPi;}float4 main( float4 unk1 : COLOR1, float4 unk2 : COLOR2 ) : COLOR0 {    // arguments to main are 'uncertain', and so are not const-expression optimized away    const float3 v1 = float3( 1, 1, 1 );    float	NL = unk1[0], NV = unk1[1],	F = unk1[2],	Df = unk1[3],	G = unk2[0],	Pi = getPi_dp24();    float Si_1 = (F * Df * G);    float Si_2 = (Pi * NL * NV);    return float4( Si_1, Si_2, Si_1 / Si_2, 1 );}