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java.lang.Objectcom.vividsolutions.jts.geomgraph.index.EdgeSetIntersector
com.vividsolutions.jts.geomgraph.index.SimpleMCSweepLineIntersector
Finds all intersections in one or two sets of edges, using an x-axis sweepline algorithm in conjunction with Monotone Chains. While still O(n^2) in the worst case, this algorithm drastically improves the average-case time. The use of MonotoneChains as the items in the index seems to offer an improvement in performance over a sweep-line alone.
| Constructor Summary | |
SimpleMCSweepLineIntersector()
A SimpleMCSweepLineIntersector creates monotone chains from the edges and compares them using a simple sweep-line along the x-axis. |
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| Method Summary | |
void |
computeIntersections(java.util.List edges0,
java.util.List edges1,
SegmentIntersector si)
Computes all mutual intersections between two sets of edges. |
void |
computeIntersections(java.util.List edges,
SegmentIntersector si,
boolean testAllSegments)
Computes all self-intersections between edges in a set of edges, allowing client to choose whether self-intersections are computed. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
public SimpleMCSweepLineIntersector()
| Method Detail |
public void computeIntersections(java.util.List edges,
SegmentIntersector si,
boolean testAllSegments)
EdgeSetIntersector
computeIntersections in class EdgeSetIntersectoredges - a list of edges to test for intersectionssi - the SegmentIntersector to usetestAllSegments - true if self-intersections are to be tested as well
public void computeIntersections(java.util.List edges0,
java.util.List edges1,
SegmentIntersector si)
EdgeSetIntersector
computeIntersections in class EdgeSetIntersector
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