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AlphaShapeFace_2

Definition

Refines

TriangulationFaceBase_2.

Types

AlphaShapeFace_2::Interval_3
A container type to get (and put) the three special values (1, 2, 3) associated with an alpha shape edge.


AlphaShapeFace_2::FT
A type to hold a coordinate type class. The type must provide a copy constructor, assignment, comparison operators, negation, multiplication, division and allow the declaration and initialization with a small integer constant (cf. requirements for number types). An obvious choice would be coordinate type of the point class

Creation


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AlphaShapeFace_2 f;
default constructor.

AlphaShapeFace_2 f ( void* v0, void* v1, void* v2);
constructor setting the incident vertices.

AlphaShapeFace_2 f ( void* v0,
void* v1,
void* v2,
void* n0,
void* n1,
void* n2);
constructor setting the incident vertices and the neighboring faces.

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Access Functions

Interval_3 f.get_ranges ( int i)
returns the interval associated with the edge indexed with i, which contains three alpha values 1 2 3, such as for between 1 and 2, the edge indexed with i is attached but singular, for between 2 and 3, the edge is regular, and for greater than 3, the edge is interior.

FT f.get_alpha () return the alpha value, under which the alpha shape contains the face.

Modifiers


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void f.set_ranges ( int i, Interval_3 V)
sets the interval associated with the edge indexed with i, which contains three alpha values 1 2 3, such as for between 1 and 2, the edge indexed with i is attached but singular, for between 2 and 3, the edge is regular, and for greater than 3, the edge is interior.

void f.set_alpha ( FT A)
sets the alpha value, under which the alpha shape contains the face.

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The CGAL Project . Tue, December 21, 2004 .