Function file_exists

tools/openpgl_bench/openpgl_bench.cpp:32–36

};

inline bool file_exists(const std::string &file_name)
{
    std::ifstream file(file_name.c_str());
    return file.good();
}

inline pgl_vec3f squareToUniformSphere(const float sampleX, const float sampleY)
{