forked from 0ad/0ad
46 lines
1.8 KiB
C++
46 lines
1.8 KiB
C++
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# ifndef SR_PLANE_H
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# define SR_PLANE_H
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# include "sr_vec.h"
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class SrPlane
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{ public :
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SrVec coords;
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float coordsw;
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static const SrPlane XY, //<! The plane of ( SrVec::null, SrVec::i, SrVec::j )
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XZ, //<! The plane of ( SrVec::null, SrVec::i, SrVec::k )
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YZ; //<! The plane of ( SrVec::null, SrVec::j, SrVec::k )
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public:
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/*! The default constructor initializes as the plane passing at (0,0,0)
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with normal (0,0,1). */
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SrPlane ();
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/*! Constructor from center and normal. Normal will be normalized. */
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SrPlane ( const SrVec& center, const SrVec& normal );
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/*! Constructor from three points in the plane. */
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SrPlane ( const SrVec& p1, const SrVec& p2, const SrVec& p3 );
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/*! Set as the plane passing at center with given normal. Normal will be normalized. */
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bool set ( const SrVec& center, const SrVec& normal );
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/*! Set as the plane passing trough three points. */
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bool set ( const SrVec& p1, const SrVec& p2, const SrVec& p3 );
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/*! determines if the plane is parallel to the line [p1,p2], according
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to the (optional) given precision ds. This method is fast (as the
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plane representation is kept normalized) and performs only one
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subraction and one dot product. */
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bool parallel ( const SrVec& p1, const SrVec& p2, float ds=0 ) const;
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/*! Returns p, that is the intersection between SrPlane and the infinity
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line <p1,p2>. (0,0,0) is returned if they are parallel. Use parallel()
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to test this before. If t is non null, t will contain the relative
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interpolation factor such that p=p1(1-t)+p2(t). */
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SrVec intersect ( const SrVec& p1, const SrVec& p2, float *t=0 ) const;
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};
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# endif // SR_PLANE_H
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