Function S2Shape.chainPosition

Finds the chain containing the given edge, and returns the position of that edge as a (chain_id, offset) pair.


					
			abstract S2Shape.ChainPosition chainPosition
			(
			

			  int edge_id
			

			) const;

REQUIRES

shape.chain(pos.chain_id).start + pos.offset == edge_id

REQUIRES

shape.chain(pos.chain_id + 1).start > edge_id

where pos == shape.chain_position(edge_id).

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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