An edge record in an envelope diagram, which represents a continuous portion of the \( x\)-axis. It is associated with a (possibly empty) set of curves that induce the envelope over this portion of the \( x\)-axis. Note that all curves in this set overlap over the interval represented by the edge.
- See also
EnvelopeDiagram_1
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EnvelopeDiagramVertex
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Size | number_of_curves () const |
| | returns the number of \( x\)-monotone curves associated with e.
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bool | is_empty () const |
| | returns whether e represents an empty interval - namely, whether the set of \( x\)-monotone curves associated with it is empty.
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| const X_monotone_curve_2 & | curve () const |
| | returns a representative \( x\)-monotone curve associated with e.
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Curve_const_iterator | curves_begin () const |
| | returns an iterator for the first \( x\)-monotone curve associated with e.
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Curve_const_iterator | curves_end () const |
| | returns a past-the-end iterator for the \( x\)-monotone curves associated with e.
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| Vertex_const_handle | left () const |
| | returns the vertex lying to e's left.
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| Vertex_const_handle | right () const |
| | returns the vertex lying to e's right.
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void | clear_curves () |
| | clears the set of curves associated with e.
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void | add_curve (const X_monotone_curve_2 &cv) |
| | adds the \( x\)-monotone curve cv to the set of curves associated with e.
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void | add_curves (Curve_const_iterator begin, Curve_const_iterator end) |
| | adds the given range of \( x\)-monotone curves to the set of curves associated with e.
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void | set_left (Vertex_const_handle v) |
| | sets the vertex lying to the left of e to be v.
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void | set_right (Vertex_const_handle v) |
| | sets the vertex lying to the right of e to be v.
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