51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
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#pragma once
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#include <cgv/math/vec.h>
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namespace cgv {
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namespace media {
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/**
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* A plane of arbitrary dimension stored as a homogeneous vector that
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defines the coefficients of the plane equation.
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*/
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template <class T>
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class plane
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{
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public:
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cgv::math::vec<T> h;
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/// construct plane of give dimension allocating a homogenous vector of one dimension mor
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plane(int dim = 3)
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{
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h.resize(dim+1);
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}
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/// construct from normal vector and distance of plane to origin, which
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/// is negated before it is copied to the last component of the stored
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/// homogenous vector
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plane(const cgv::math::vec<T> &n, const T &distance)
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{
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h.resize(n.size()+1);
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for (unsigned int i=0; i<n.size(); ++i)
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h(i) = n(i);
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h(n.size()) = -distance;
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}
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/// return the normal vector
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cgv::math::vec<T> get_normal() const
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{
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cgv::math::vec<T> n;
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n.resize(h.size()-1);
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for (unsigned int i=0; i<n.size(); ++i)
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n(i) = h(i);
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return n;
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}
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/// return the distance of the plane to the origin
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T get_distance() const
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{
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return -h(h.size()-1);
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}
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};
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}
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}
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