CGAL 4.5.2 - 2D Alpha Shapes
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Types | |
typedef unspecified_type | Interval_3 |
A container type to get (and put) the three special values ( \( \alpha_1, \alpha_2, \alpha_3\)) associated with an alpha shape edge. | |
typedef unspecified_type | FT |
A coordinate type. More... | |
Creation | |
AlphaShapeFace_2 () | |
default constructor. | |
AlphaShapeFace_2 (const Vertex_handle &v0, const Vertex_handle &v1, const Vertex_handle &v2) | |
constructor setting the incident vertices. | |
AlphaShapeFace_2 (const Vertex_handle &v0, const Vertex_handle &v1, const Vertex_handle &v2, const Face_handle &n0, const Face_handle &n1, const Face_handle &n2) | |
constructor setting the incident vertices and the neighboring faces. | |
Access Functions | |
Interval_3 | get_ranges (const int &i) |
returns the interval associated with the edge indexed with \( i\), which contains three alpha values \( \alpha_1 \leq\alpha_2 \leq\alpha_3\), such as for \( \alpha\) between \( \alpha_1\) and \( \alpha_2\), the edge indexed with \( i\) is attached but singular, for \( \alpha\) between \( \alpha_2\) and \( \alpha_3\), the edge is regular, and for \( \alpha\) greater than \( \alpha_3\), the edge is interior. | |
FT | get_alpha () |
return the alpha value, under which the alpha shape contains the face. | |
Modifiers | |
void | set_ranges (const int &i, const Interval_3 &V) |
sets the interval associated with the edge indexed with \( i\), which contains three alpha values \( \alpha_1 \leq\alpha_2 \leq\alpha_3\), such as for \( \alpha\) between \( \alpha_1\) and \( \alpha_2\), the edge indexed with \( i\) is attached but singular, for \( \alpha\) between \( \alpha_2\) and \( \alpha_3\), the edge is regular, and for \( \alpha\) greater than \( \alpha_3\), the edge is interior. | |
void | set_alpha (FT A) |
sets the alpha value, under which the alpha shape contains the face. | |
typedef unspecified_type AlphaShapeFace_2::FT |
A coordinate type.
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