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static float dexposure = 0.f;
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static float dexposure = 0.f;
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Vec3uc tonemap(const Vec3f& v)
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Vec3uc tonemap(const Vec3f& v)
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{
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{
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    Vec3f u = v * std::pow(2.f, dexposure);
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    Vec3f u = v * std::pow(2.f, dexposure);
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    float r = random() - 0.5f;
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    float r = mt_random() - 0.5f;
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    Vec3uc I;
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    Vec3uc I;
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    for (int i=0; i<3; ++i)
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    for (int i=0; i<3; ++i)
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    {
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    {
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        float c = std::pow(u[i], 1.f / dgamma);
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        float c = std::pow(u[i], 1.f / dgamma);
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    //build acceleration structure
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    //build acceleration structure
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    current->initialize(8, 25);
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    current->initialize(8, 25);
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    //create the renderer
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    //create the renderer
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    renderer = new path_tracer(width, height, true, 4);
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    renderer = new path_tracer(width, height, true, 1);
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    renderer->set_scene(current);
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    renderer->set_scene(current);
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    //create the film
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    //create the film
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    film = new Vec3f[width * height];
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    film = new Vec3f[width * height];
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    std::fill(film, film+width*height, Vec3f(0.3f));
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    std::fill(film, film+width*height, Vec3f(0.3f));