ray.h File Reference

#include <plugins/3dapi/xv3d_types.h>

Go to the source code of this file.

Classes
struct	RAY
struct	RAY2D
struct	RAYSEG2D

Enumerations
enum class	RAY_CLASSIFICATION {   MMM , MMP , MPM , MPP ,   PMM , PMP , PPM , PPP ,   POO , MOO , OPO , OMO ,   OOP , OOM , OMM , OMP ,   OPM , OPP , MOM , MOP ,   POM , POP , MMO , MPO ,   PMO , PPO }

Functions
bool	IntersectSegment (const SFVEC2F &aStartA, const SFVEC2F &aEnd_minus_startA, const SFVEC2F &aStartB, const SFVEC2F &aEnd_minus_startB)

Enumeration Type Documentation

RAY_CLASSIFICATION

enum class RAY_CLASSIFICATION

strong

Enumerator
MMM
MMP
MPM
MPP
PMM
PMP
PPM
PPP
POO
MOO
OPO
OMO
OOP
OOM
OMM
OMP
OPM
OPP
MOM
MOP
POM
POP
MMO
MPO
PMO
PPO

Definition at line 31 of file ray.h.

{
 MMM,
 MMP,
 MPM,
 MPP,
 PMM,
 PMP,
 PPM,
 PPP,
 POO,
 MOO,
 OPO,
 OMO,
 OOP,
 OOM,
 OMM,
 OMP,
 OPM,
 OPP,
 MOM,
 MOP,
 POM,
 POP,
 MMO,
 MPO,
 PMO,
 PPO
};

Function Documentation

IntersectSegment()

bool IntersectSegment	(	const SFVEC2F &	aStartA,
		const SFVEC2F &	aEnd_minus_startA,
		const SFVEC2F &	aStartB,
		const SFVEC2F &	aEnd_minus_startB
	)

Definition at line 181 of file ray.cpp.

{
 float rxs = aEnd_minus_startA.x * aEnd_minus_startB.y - aEnd_minus_startA.y *
 aEnd_minus_startB.x;
 
 if( std::abs( rxs ) > glm::epsilon<float>() )
 {
 float inv_rxs = 1.0f / rxs;
 
 SFVEC2F pq = aStartB - aStartA;
 
 float t = ( pq.x * aEnd_minus_startB.y - pq.y * aEnd_minus_startB.x ) * inv_rxs;
 
 if( ( t < 0.0f ) || ( t > 1.0f ) )
 return false;
 
 float u = ( pq.x * aEnd_minus_startA.y - pq.y * aEnd_minus_startA.x ) * inv_rxs;
 
 if( ( u < 0.0f ) || ( u > 1.0f ) )
 return false;
 
 return true;
 }
 
 return false;
}

References std::abs().

Referenced by ROUND_SEGMENT_2D::Intersects().