61 lines
1.3 KiB
C++
61 lines
1.3 KiB
C++
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#ifndef GOMEZ_COORDFRAME_H
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#define GOMEZ_COORDFRAME_H
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/**
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* Taken from:
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* http://www.gamasutra.com/features/19990702/data_structures_01.htm
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* http://www.gamasutra.com/features/19991018/Gomez_1.htm
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*
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* Both by Miguel Gomez
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*/
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#include "basis.hpp"
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namespace GomezMath {
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// A coordinate frame (basis and origin) with respect to a parent
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//
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class CoordFrame:public Basis
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{
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public:
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Point O; //this coordinate frame’s origin, relative to its parent frame
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public:
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CoordFrame ()
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{
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}
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CoordFrame (const Point & o,
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const Vector & v0,
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const Vector & v1, const Vector & v2): Basis (v0, v1, v2), O(o)
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{
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}
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CoordFrame (const Point & o, const Basis & b): Basis (b), O(o)
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{
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}
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const Point & position () const
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{
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return O;
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}
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void position (const Point & p)
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{
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O = p;
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}
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const Point transformPointToLocal (const Point & p) const
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{
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//translate to this frame’s origin, then project onto this basis
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return transformVectorToLocal (p - O);
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}
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const Point transformPointToParent (const Point & p) const
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{
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//transform the coordinate vector and translate by this origin
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return transformVectorToParent (p) + O;
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}
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//translate the origin by the given vector
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void translate (const Vector & v)
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{
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O += v;
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}
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};
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}
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#endif
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