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