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## com.vividsolutions.jts.geomgraph.index
Class MonotoneChainIndexer

    java.lang.Object
      com.vividsolutions.jts.geomgraph.index.MonotoneChainIndexer

    public class MonotoneChainIndexer

extends java.lang.Object

MonotoneChains are a way of partitioning the segments of an edge to allow for fast searching of intersections. Specifically, a sequence of contiguous line segments is a monotone chain iff all the vectors defined by the oriented segments lies in the same quadrant.

Monotone Chains have the following useful properties:

1. the segments within a monotone chain will never intersect each other
2. the envelope of any contiguous subset of the segments in a monotone chain is simply the envelope of the endpoints of the subset.

Property 1 means that there is no need to test pairs of segments from within the same monotone chain for intersection. Property 2 allows binary search to be used to find the intersection points of two monotone chains. For many types of real-world data, these properties eliminate a large number of segment comparisons, producing substantial speed gains.

Version:
  1.7

Constructor Summary
`MonotoneChainIndexer()`

Method Summary
`int[]` | `getChainStartIndices(Coordinate[] pts)`
`static int[]` | `toIntArray(java.util.List list)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### MonotoneChainIndexer

    public MonotoneChainIndexer()

Method Detail

### toIntArray

    public static int[] toIntArray(java.util.List list)

### getChainStartIndices

    public int[] getChainStartIndices(Coordinate[] pts)

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