Gabriele Cosmo
72 lines
1.7 KiB
Plaintext
72 lines
1.7 KiB
Plaintext
// Copyright (C) 2010, Guy Barrand. All rights reserved.
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// See the file tools.license for terms.
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#ifndef tools_line
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#define tools_line
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namespace tools {
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// Parametric description:
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// l(t) = pos + t * dir
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template <class VEC3>
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class line {
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protected:
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typedef typename VEC3::elem_t T;
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public:
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line(){}
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line(const VEC3& a_p0,const VEC3& a_p1) {
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// Construct a line from two points lying on the line. If you
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// want to construct a line from a position and a direction, use
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// line(p, p + d).
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// line is directed from p0 to p1.
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m_pos = a_p0;
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m_dir = a_p0;
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m_dir.multiply(-1);
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m_dir.add(a_p1);
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m_dir.normalize();
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}
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line(const T& a_0_x,const T& a_0_y,const T& a_0_z,
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const T& a_1_x,const T& a_1_y,const T& a_1_z) {
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m_pos.set_value(a_0_x,a_0_y,a_0_z);
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m_dir.set_value(a_1_x-a_0_x,a_1_y-a_0_y,a_1_z-a_0_z);
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m_dir.normalize();
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}
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virtual ~line() {}
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public:
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line(const line& a_from)
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:m_pos(a_from.m_pos)
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,m_dir(a_from.m_dir)
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{}
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line& operator=(const line& a_from) {
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m_pos = a_from.m_pos;
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m_dir = a_from.m_dir;
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return *this;
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}
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public:
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void set_value(const VEC3& a_p0,const VEC3& a_p1) {
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m_pos = a_p0;
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m_dir = a_p0;
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m_dir.multiply(-1);
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m_dir.add(a_p1);
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m_dir.normalize();
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}
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void set_value(const T& a_0_x,const T& a_0_y,const T& a_0_z,
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const T& a_1_x,const T& a_1_y,const T& a_1_z) {
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m_pos.set_value(a_0_x,a_0_y,a_0_z);
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m_dir.set_value(a_1_x-a_0_x,a_1_y-a_0_y,a_1_z-a_0_z);
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m_dir.normalize();
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}
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const VEC3& position() const {return m_pos;}
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const VEC3& direction() const {return m_dir;}
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protected:
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VEC3 m_pos;
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VEC3 m_dir; //normalized.
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};
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}
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#endif
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