Regina Calculation Engine
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A slow but flexible class storing a ray rooted at the origin whose coordinates are rational. More...
#include <nray.h>
Public Member Functions | |
NRay (unsigned length) | |
Creates a new ray all of whose coordinates are initialised to zero. | |
NRay (const NVector< NLargeInteger > &cloneMe) | |
Creates a new ray that is a clone of the given ray. | |
virtual NVector< NLargeInteger > * | clone () const |
Makes a newly allocated clone of this vector. | |
virtual void | negate () |
Negates every element of this vector. | |
void | scaleDown () |
Scales this vector down by the greatest common divisor of all its elements. |
A slow but flexible class storing a ray rooted at the origin whose coordinates are rational.
Such a ray is a half-line beginning at the origin and is represented by an integer point that it passes through. Positive scalar multiples of a ray are considered to represent the same ray.
Like its parent class NVector, this ray class is slow (in particular, many functions are virtual). For a fast ray class better suited to heavy computation, see NFastRay instead.
regina::NRay::NRay | ( | unsigned | length | ) | [inline] |
Creates a new ray all of whose coordinates are initialised to zero.
length | the number of elements in the new vector. |
regina::NRay::NRay | ( | const NVector< NLargeInteger > & | cloneMe | ) | [inline] |
Creates a new ray that is a clone of the given ray.
cloneMe | the ray to clone. |
NVector< NLargeInteger > * regina::NRay::clone | ( | ) | const [inline, virtual] |
Makes a newly allocated clone of this vector.
The clone will be of the same subclass of NVector as this vector.
Reimplemented from regina::NVectorDense< NLargeInteger >.
Reimplemented in regina::NAngleStructureVector, regina::NNormalSurfaceVectorANStandard, regina::NNormalSurfaceVectorQuad, regina::NNormalSurfaceVectorQuadOct, and regina::NNormalSurfaceVectorStandard.
void regina::NRay::negate | ( | ) | [inline, virtual] |
Negates every element of this vector.
Reimplemented from regina::NVectorDense< NLargeInteger >.
void regina::NRay::scaleDown | ( | ) |
Scales this vector down by the greatest common divisor of all its elements.
The resulting vector will be the smallest multiple of the original that maintains integral entries, and these entries will have the same signs as the originals.
This routine thus reduces a ray to its smallest possible representation.
This routine poses no problem for vectors containing infinite elements; such elements are simply ignored and left at infinity.