Function S2Shape.numChains

Returns the number of contiguous edge chains in the shape. For example, a shape whose edges are [AB, BC, CD, AE, EF] would consist of two chains (AB,BC,CD and AE,EF). Every chain is assigned a "chain id" numbered sequentially starting from zero.


					
			abstract int numChains() const;

Note that it is always acceptable to implement this method by returning num_edges() (i.e. every chain consists of a single edge), but this may reduce the efficiency of some algorithms.

Authors

ericv@google.com (Eric Veach), madric@gmail.com (Vijay Nayar)

License

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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