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Arr_vertex_index_map<Arrangement> maintains a mapping of vertex handles of an attached arrangement object to indices (of type unsigned int). This class template is a model of the Boost concept ReadablePropertyMap. A mapping between vertex handles and indices enables convenient usage of property-map classes supplied by Boost. For example, the property-map class templates boost::vector_property_map, which is based on std::vector, and boost::iterator_property_map, which can be used to implement a property map based on a native C++ array, require the user to supply a mapping such as Arr_vertex_index_map<Arrangement>.
As new vertices might be inserted into the attached arrangement, and existing vertices might be removed, the notification mechanism is used to dynamically maintain the mapping of vertex handles to indices.
#include <CGAL/Arr_vertex_index_map.h>
| Arr_vertex_index_map<Arrangement>::Arrangement_2 | |
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the type of the attached arrangement.
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| Arr_vertex_index_map<Arrangement>::category | |
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boost::readable_property_map_tag
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| Arr_vertex_index_map<Arrangement>::value_type | |
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unsigned int
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| Arr_vertex_index_map<Arrangement>::reference | |
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unsigned int
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| Arr_vertex_index_map<Arrangement>::key_type | |
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Vertex_handle
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| typedef typename Arrangement_2::Vertex_handle | ||
| Vertex_handle; | The vertex handle type. | |
| typedef Unique_hash_map<Vertex_handle, value_type> | ||
| Index_map; | The type of mapping of vertices to indices. | |
| Arr_vertex_index_map<Arrangement> vertex_index_map; | |
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constructs a map that is unattached to any arrangement instance.
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| Arr_vertex_index_map<Arrangement> vertex_index_map ( Arrangement_2& arr); | |
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constructs a map and attaches it to the given arrangement arr.
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