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void
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v.pre_remove_vertex ( Vertex_handle)
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The vertex is about to be deleted.
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void
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v.post_remove_vertex ( Point_key)
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The vertex was just removed.
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void
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v.pre_insert_vertex ( Point_key)
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The vertex is about to be inserted into the cell (although the Cell_handle might be NULL).
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void
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v.post_insert_vertex ( Vertex_handle)
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The vertex was just inserted.
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void
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v.change_vertex ( Vertex_handle)
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Something changed at the vertex.
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void
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v.pre_swap ( Vertex_handle, Vertex_handle)
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The pair of vertices is about to be exchanged.
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void
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v.post_swap ( Vertex_handle, Vertex_handle)
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The pair of vertices was just swapped.
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