Subversion Repositories gelsvn

#include "plastic.hpp"

using namespace CGLA;

plastic::plastic(const CGLA::Vec3f& d, const CGLA::Vec3f& g, float s)
: material(1.6f, 0.f), diffuse_(d), glossy_(g), shininess_(s)
{
}

void plastic::sample(const ray& r, hit_info& hi) const
{
        float cosi = dot(-r.direction, hi.shading_normal);
        cosi = clamp(cosi, -1.f, 1.f);
        if (cosi <= 0.f)
                return;
        float sint = 1.f / ior_ * std::sqrt(std::max(0.f, 1.f - cosi*cosi));
        float cost = std::sqrt(std::max(0.f, 1.f - sint * sint));
        cost = clamp(cost, -1.f, 1.f);
        float f = fresnel_dielectric(cosi, cost, ior_);

        hi.diffuse = diffuse_;
        hi.glossy = f*glossy_;
        hi.shininess = shininess_;
        hi.ior = ior_;
}

//02566 framework, Anders Wang Kristensen, awk@imm.dtu.dk, 2007