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346 awk 1 
#include "camera.hpp"
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using namespace CGLA;
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camera::camera(const CGLA::Vec3f& eye,
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			   const CGLA::Vec3f& cnt,
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			   const CGLA::Vec3f& up,
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			   float focal)
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{
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	eye_ = eye;
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	z_ = normalize(eye - cnt);
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	x_ = normalize(cross(up, z_));
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	y_ = cross(z_, x_);
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	x_ *= 0.012f;
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	y_ *= 0.012f;
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	focal_ = focal;
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}
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ray camera::generate(const Vec2f& uv) const
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{
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	Vec2f xy = 2.f * uv - Vec2f(1.f);
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	ray r;
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	r.origin = eye_;
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	r.direction = normalize(-focal_*z_ + xy[0]*x_ + xy[1]*y_);
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	r.depth = 0;
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	r.distance = std::numeric_limits<float>::infinity();
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	return r;
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}
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//02566 framework, Anders Wang Kristensen, awk@imm.dtu.dk, 2007