MeshObjectCommon : Performs functions common to 3D and 2D closed meshes. More...

Functions
MANTID_GEOMETRY_DLL void	checkVertexLimit (size_t nVertices)

MANTID_GEOMETRY_DLL const BoundingBox &	getBoundingBox (const std::vector< Kernel::V3D > &vertices, BoundingBox &cacheBB)
	Takes input vertices and calculates bounding box. More...

MANTID_GEOMETRY_DLL void	getBoundingBox (const std::vector< Kernel::V3D > &vertices, BoundingBox &cacheBB, double &xmax, double &ymax, double &zmax, double &xmin, double &ymin, double &zmin)
	From vertices calculates the bounding box. More...

MANTID_GEOMETRY_DLL double	getTriangleSolidAngle (const Kernel::V3D &a, const Kernel::V3D &b, const Kernel::V3D &c, const Kernel::V3D &observer)
	Find the solid angle of a triangle defined by vectors a,b,c from point "observer". More...

MANTID_GEOMETRY_DLL std::vector< double >	getVertices (const std::vector< Kernel::V3D > &vertices)
	getVertices converts vector Kernel::V3D to vector doubles. More...

MANTID_GEOMETRY_DLL bool	isOnTriangle (const Kernel::V3D &point, const Kernel::V3D &v1, const Kernel::V3D &v2, const Kernel::V3D &v3)
	isOnTriangle More...

MANTID_GEOMETRY_DLL bool	rayIntersectsTriangle (const Kernel::V3D &start, const Kernel::V3D &direction, const Kernel::V3D &v1, const Kernel::V3D &v2, const Kernel::V3D &v3, Kernel::V3D &intersection, TrackDirection &entryExit)
	Get intersection points and their in out directions on the given ray. More...

Detailed Description

MeshObjectCommon : Performs functions common to 3D and 2D closed meshes.

Function Documentation

◆ checkVertexLimit()

void Mantid::Geometry::MeshObjectCommon::checkVertexLimit ( size_t nVertices )

Definition at line 194 of file MeshObjectCommon.cpp.

References std::to_string().

Referenced by Mantid::Geometry::MeshObject::initialize(), and Mantid::Geometry::MeshObject2D::initialize().

◆ getBoundingBox() [1/2]

const BoundingBox & Mantid::Geometry::MeshObjectCommon::getBoundingBox	(	const std::vector< Kernel::V3D > &	vertices,
		BoundingBox &	cacheBB
	)

Takes input vertices and calculates bounding box.

Returns the bounding box.

Parameters

vertices	:: vertices to create BB from
cacheBB	:: mutable BB object to write to.

Definition at line 207 of file MeshObjectCommon.cpp.

References Mantid::Geometry::BoundingBox::isNull().

Referenced by Mantid::Geometry::MeshObject2D::getBoundingBox(), getBoundingBox(), and Mantid::Geometry::MeshObject::getBoundingBox().

◆ getBoundingBox() [2/2]

void Mantid::Geometry::MeshObjectCommon::getBoundingBox	(	const std::vector< Kernel::V3D > &	vertices,
		BoundingBox &	cacheBB,
		double &	xmax,
		double &	ymax,
		double &	zmax,
		double &	xmin,
		double &	ymin,
		double &	zmin
	)

From vertices calculates the bounding box.

Returns them back in max and min points as well as mutated BB object.

Parameters

vertices	:: vertices to create BB from
cacheBB	:: mutable BB object to write to.
xmax	:: Maximum value for the bounding box in x direction
ymax	:: Maximum value for the bounding box in y direction
zmax	:: Maximum value for the bounding box in z direction
xmin	:: Minimum value for the bounding box in x direction
ymin	:: Minimum value for the bounding box in y direction
zmin	:: Minimum value for the bounding box in z direction

Definition at line 255 of file MeshObjectCommon.cpp.

References getBoundingBox().

◆ getTriangleSolidAngle()

double Mantid::Geometry::MeshObjectCommon::getTriangleSolidAngle	(	const Kernel::V3D &	a,
		const Kernel::V3D &	b,
		const Kernel::V3D &	c,
		const Kernel::V3D &	observer
	)

Find the solid angle of a triangle defined by vectors a,b,c from point "observer".

formula (Oosterom) O=2atan([a,b,c]/(abc+(a.b)c+(a.c)b+(b.c)a))

Parameters

a	:: first point of triangle
b	:: second point of triangle
c	:: third point of triangle
observer	:: point from which solid angle is required

Returns: :: solid angle of triangle in Steradians.

This duplicates code in CSGOjbect both need a place to be merged. To aid this, this function has been defined as a non-member.

Definition at line 48 of file MeshObjectCommon.cpp.

References Mantid::Kernel::V3D::cross_prod(), Mantid::Kernel::V3D::norm(), and Mantid::Kernel::V3D::scalar_prod().

Referenced by Mantid::Geometry::MeshObject::solidAngle(), and Mantid::Geometry::MeshObject2D::solidAngle().

◆ getVertices()

std::vector< double > Mantid::Geometry::MeshObjectCommon::getVertices ( const std::vector< Kernel::V3D > & vertices )

getVertices converts vector Kernel::V3D to vector doubles.

3x size of input. ordered x,y,z,x,y,z...

Parameters

vertices : input vector of Kernel::V3D

Returns: : vector of doubles. Elements of input.

Definition at line 19 of file MeshObjectCommon.cpp.

Referenced by Mantid::Geometry::MeshObject::getVertices(), and Mantid::Geometry::MeshObject2D::getVertices().

◆ isOnTriangle()

bool Mantid::Geometry::MeshObjectCommon::isOnTriangle	(	const Kernel::V3D &	point,
		const Kernel::V3D &	v1,
		const Kernel::V3D &	v2,
		const Kernel::V3D &	v3
	)

isOnTriangle

Parameters

point	: point to test
v1	: first vertex of triangle
v2	: second vertex of triangle
v3	: thrid vertex of triangle

Returns: True only point if is on triangle

Definition at line 75 of file MeshObjectCommon.cpp.

References Mantid::Kernel::V3D::scalar_prod().

Referenced by Mantid::Geometry::MeshObject2D::isValid().

◆ rayIntersectsTriangle()

bool Mantid::Geometry::MeshObjectCommon::rayIntersectsTriangle	(	const Kernel::V3D &	start,
		const Kernel::V3D &	direction,
		const Kernel::V3D &	v1,
		const Kernel::V3D &	v2,
		const Kernel::V3D &	v3,
		Kernel::V3D &	intersection,
		TrackDirection &	entryExit
	)

Get intersection points and their in out directions on the given ray.

Parameters

start	:: Start point of ray
direction	:: Direction of ray
v1	:: First vertex of triangle
v2	:: Second vertex of triangle
v3	:: Third vertex of triangle
intersection	:: Intersection point
entryExit	:: 1 if intersection is entry, -1 if exit intersection

Returns: true if there is an intersection

Definition at line 130 of file MeshObjectCommon.cpp.

References Mantid::Kernel::V3D::cross_prod(), Mantid::Geometry::ENTERING, EPSILON(), Mantid::Geometry::intersection(), Mantid::Geometry::LEAVING, and Mantid::Kernel::V3D::scalar_prod().

Referenced by Mantid::Geometry::MeshObject2D::distance(), Mantid::Geometry::MeshObject::distance(), Mantid::Geometry::MeshObject::getIntersections(), and Mantid::Geometry::MeshObject2D::interceptSurface().

Functions

Detailed Description

Function Documentation

◆ checkVertexLimit()

◆ getBoundingBox() [1/2]

◆ getBoundingBox() [2/2]

◆ getTriangleSolidAngle()

◆ getVertices()

◆ isOnTriangle()

◆ rayIntersectsTriangle()