Searched refs:sin4h (Results 1 – 1 of 1) sorted by relevance
54 const float sin4h = sin2h * sin2h; in dAshikhmin() local55 return (sin4h + 4.0 * exp(-cos2h / (sin2h * r2))) / (CORE_BRDF_PI * (1.0 + 4.0 * r2) * sin4h); in dAshikhmin()