53 lines
1.0 KiB
C
53 lines
1.0 KiB
C
#ifndef __PLANE_H__
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#define __PLANE_H__
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#include "mathtypes.h"
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#include "vector3.h"
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struct Plane
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{
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Vector3 m_Normal;
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real m_Distance;
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inline real GetDistance( Vector3 const &pnt ) const;
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inline void Normalise( void );
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inline void SetPlane( Vector3 const &p0, Vector3 const &p1 );
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inline void SetPlane( Vector3 const &p0, Vector3 const &p1, Vector3 const &p2 );
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};
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inline real Plane::GetDistance( Vector3 const &pnt ) const
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{
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real v = (m_Normal * pnt) + m_Distance;
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return v;
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}
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inline void Plane::Normalise( void )
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{
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real mag = m_Normal.GetLength();
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real oneomag = 1.f / mag;
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m_Normal.x *= oneomag;
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m_Normal.y *= oneomag;
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m_Normal.z *= oneomag;
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m_Distance *= oneomag;
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}
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inline void Plane::SetPlane( Vector3 const &v0, Vector3 const &v1 )
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{
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m_Normal = v0 ^ v1;
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m_Normal.Normalise();
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m_Distance = 0.f;
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}
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inline void Plane::SetPlane( Vector3 const &p0, Vector3 const &p1, Vector3 const &p2 )
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{
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Vector3 v0 = (p1 - p0);
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Vector3 v1 = (p2 - p0);
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m_Normal = v0 ^ v1;
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m_Normal.Normalise();
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m_Distance = -(p0 * m_Normal);
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}
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#endif |