Calculates the intersection of a ray with a set of triangles in 3D. More...

Inheritance diagram for Arcane::RayTriangle3DIntersection:

Collaboration diagram for Arcane::RayTriangle3DIntersection:

Public Member Functions
	RayTriangle3DIntersection (ITraceMng *tm)
void	setRays (Real3ConstArrayView origins, Real3ConstArrayView directions)
	Positions the list of rays for which intersection is desired.
void	setTriangles (Real3ConstArrayView coordinates, Int32ConstArrayView indexes)
	Positions the list of triangles for which intersection is desired with the rays. The array indexes contains for each triangle the indices in the coordinates array of each vertex. For example, indexes[0..2] contains the indices of the vertices of the 1st triangle, indexes[3..5] those of the second.
void	compute ()
	Calculates the intersection of each ray with the list of triangles. If a ray intersects multiple triangles, we keep the one whose distance from the ray origin is the smallest.
RealConstArrayView	distances ()
	Distance from the origin of a ray to its intersection point. Distance (expressed relative to the norm of directions) of a ray's intersection point relative to its origin. For ray i, its intersection point is therefore given by the formula (origins[i] + distances[i]*directions[i]). The distance is negative if the ray does not intersect any triangle. This array is filled when compute() is called.
Int32ConstArrayView	intersectedTriangleIndexes ()
	Indices of intersected triangles. Index in the array provided by setTriangles() of the triangle intersected by each ray. This index is -1 if a ray does not intersect a triangle. This array is filled when compute() is called.
Real	checkIntersection (Real3 origin, Real3 direction, Real3 p0, Real3 p1, Real3 p2)
	Calculates the intersection of the half-line [origin,direction) with the triangle (p0,p1,p2).
Public Member Functions inherited from Arcane::TraceAccessor
	TraceAccessor (ITraceMng *m)
	Constructs an accessor via the trace manager m.
	TraceAccessor (const TraceAccessor &rhs)
	Copy constructor.
TraceAccessor &	operator= (const TraceAccessor &rhs)
	Copy assignment operator.
virtual	~TraceAccessor ()
	Frees resources.
ITraceMng *	traceMng () const
	Trace manager.
TraceMessage	info () const
	Flow for an information message.
TraceMessage	pinfo () const
	Flow for a parallel information message.
TraceMessage	info (char category) const
	Flow for an information message of a given category.
TraceMessage	pinfo (char category) const
	Flow for a parallel information message of a given category.
TraceMessage	info (bool v) const
	Flow for an information message.
TraceMessage	warning () const
	Flow for a warning message.
TraceMessage	pwarning () const
TraceMessage	error () const
	Flow for an error message.
TraceMessage	perror () const
TraceMessage	log () const
	Flow for a log message.
TraceMessage	plog () const
	Flow for a log message.
TraceMessage	logdate () const
	Flow for a log message preceded by the date.
TraceMessage	fatal () const
	Flow for a fatal error message.
TraceMessage	pfatal () const
	Flow for a parallel fatal error message.
TraceMessageDbg	debug (Trace::eDebugLevel=Trace::Medium) const
	Flow for a debug message.
Trace::eDebugLevel	configDbgLevel () const
	Debug level of the configuration file.
TraceMessage	info (Int32 verbose_level) const
	Flow for an information message of a given level.
TraceMessage	linfo () const
	Flow for an information message with the local information level of this instance.
TraceMessage	linfo (Int32 relative_level) const
	Flow for an information message with the local information level of this instance.
void	fatalMessage (const StandaloneTraceMessage &o) const

Static Public Member Functions
static bool	checkBoundingBox (Real3 origin, Real3 direction, Real3 box_min, Real3 box_max)

Private Member Functions
void	_compute2 (Int32 triangle_id, Real3 p0, Real3 p1, Real3 p2)

Private Attributes
Real3ConstArrayView	m_rays_origin
Real3ConstArrayView	m_rays_direction
Real3ConstArrayView	m_triangles_coordinates
Int32ConstArrayView	m_triangles_indexes
RealUniqueArray	m_distances
Int32UniqueArray	m_intersected_triangle_indexes

Additional Inherited Members
Protected Member Functions inherited from Arcane::TraceAccessor
void	_setLocalVerboseLevel (Int32 v)
Int32	_localVerboseLevel () const

Detailed Description

Calculates the intersection of a ray with a set of triangles in 3D.

A ray is a half-line and is defined by its origin and direction. You must position the rays (via setRays()) and the list of triangles (via setTriangles()) then call the compute() method. In return, you can retrieve the distance (distances()) and the intersected triangle (intersectedTriangleIndexes()).

The views passed as arguments (setRays() and setTriangles()) must not be modified while the instance exists.

Definition at line 56 of file BasicRayMeshIntersection.cc.

Constructor & Destructor Documentation

◆ RayTriangle3DIntersection()

Arcane::RayTriangle3DIntersection::RayTriangle3DIntersection ( ITraceMng * tm )

inline

Definition at line 61 of file BasicRayMeshIntersection.cc.

Member Function Documentation

◆ _compute2()

void Arcane::RayTriangle3DIntersection::_compute2	(	Int32	triangle_id,
		Real3	p0,
		Real3	p1,
		Real3	p2 )

private

Definition at line 172 of file BasicRayMeshIntersection.cc.

◆ checkBoundingBox()

bool Arcane::RayTriangle3DIntersection::checkBoundingBox	(	Real3	origin,
		Real3	direction,
		Real3	box_min,
		Real3	box_max )

static

Definition at line 294 of file BasicRayMeshIntersection.cc.

◆ checkIntersection()

Real Arcane::RayTriangle3DIntersection::checkIntersection	(	Real3	origin,
		Real3	direction,
		Real3	p0,
		Real3	p1,
		Real3	p2 )

Calculates the intersection of the half-line [origin,direction) with the triangle (p0,p1,p2).

The direction does not need to be normalized.

The position of the intersection point is P = origin + t * direction where t is the value returned by this function. This value is negative if no intersection point is found.

Definition at line 202 of file BasicRayMeshIntersection.cc.

References Arcane::math::dot(), and Arcane::math::vecMul().

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◆ compute()

void Arcane::RayTriangle3DIntersection::compute ( )

Calculates the intersection of each ray with the list of triangles. If a ray intersects multiple triangles, we keep the one whose distance from the ray origin is the smallest.

Definition at line 140 of file BasicRayMeshIntersection.cc.

References Arcane::TraceAccessor::info().

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◆ distances()

RealConstArrayView Arcane::RayTriangle3DIntersection::distances ( )

inline

Distance from the origin of a ray to its intersection point. Distance (expressed relative to the norm of directions) of a ray's intersection point relative to its origin. For ray i, its intersection point is therefore given by the formula (origins[i] + distances[i]*directions[i]). The distance is negative if the ray does not intersect any triangle. This array is filled when compute() is called.

Definition at line 101 of file BasicRayMeshIntersection.cc.

◆ intersectedTriangleIndexes()

Int32ConstArrayView Arcane::RayTriangle3DIntersection::intersectedTriangleIndexes ( )

inline

Indices of intersected triangles. Index in the array provided by setTriangles() of the triangle intersected by each ray. This index is -1 if a ray does not intersect a triangle. This array is filled when compute() is called.

Definition at line 113 of file BasicRayMeshIntersection.cc.

◆ setRays()

void Arcane::RayTriangle3DIntersection::setRays	(	Real3ConstArrayView	origins,
		Real3ConstArrayView	directions )

inline

Positions the list of rays for which intersection is desired.

Definition at line 69 of file BasicRayMeshIntersection.cc.

◆ setTriangles()

void Arcane::RayTriangle3DIntersection::setTriangles	(	Real3ConstArrayView	coordinates,
		Int32ConstArrayView	indexes )

inline

Positions the list of triangles for which intersection is desired with the rays. The array indexes contains for each triangle the indices in the coordinates array of each vertex. For example, indexes[0..2] contains the indices of the vertices of the 1st triangle, indexes[3..5] those of the second.

Definition at line 81 of file BasicRayMeshIntersection.cc.