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java.lang.Object com.vividsolutions.jts.algorithm.MinimumDiameter
public class MinimumDiameter
Computes the minimum diameter of a Geometry
.
The minimum diameter is defined to be the
width of the smallest band that
contains the geometry,
where a band is a strip of the plane defined
by two parallel lines.
This can be thought of as the smallest hole that the geometry can be
moved through, with a single rotation.
The first step in the algorithm is computing the convex hull of the Geometry. If the input Geometry is known to be convex, a hint can be supplied to avoid this computation.
This class can also be used to compute a line segment representing the minimum diameter, the supporting line segment of the minimum diameter, and a minimum rectangle enclosing the input geometry. This rectangle will have width equal to the minimum diameter, and have one side parallel to the supporting segment.
ConvexHull
Constructor Summary | |
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MinimumDiameter(Geometry inputGeom)
Compute a minimum diameter for a given Geometry . |
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MinimumDiameter(Geometry inputGeom,
boolean isConvex)
Compute a minimum diameter for a giver Geometry ,
with a hint if
the Geometry is convex
(e.g. |
Method Summary | |
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LineString |
getDiameter()
Gets a LineString which is a minimum diameter |
double |
getLength()
Gets the length of the minimum diameter of the input Geometry |
Geometry |
getMinimumRectangle()
Gets the minimum rectangular Polygon which encloses the input geometry. |
LineString |
getSupportingSegment()
Gets the segment forming the base of the minimum diameter |
Coordinate |
getWidthCoordinate()
Gets the Coordinate forming one end of the minimum diameter |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public MinimumDiameter(Geometry inputGeom)
Geometry
.
geom
- a Geometrypublic MinimumDiameter(Geometry inputGeom, boolean isConvex)
Geometry
,
with a hint if
the Geometry is convex
(e.g. a convex Polygon or LinearRing,
or a two-point LineString, or a Point).
geom
- a Geometry which is convexisConvex
- true
if the input geometry is convexMethod Detail |
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public double getLength()
public Coordinate getWidthCoordinate()
Coordinate
forming one end of the minimum diameter
public LineString getSupportingSegment()
public LineString getDiameter()
LineString
which is a minimum diameter
LineString
which is a minimum diameterpublic Geometry getMinimumRectangle()
Polygon
which encloses the input geometry.
The rectangle has width equal to the minimum diameter,
and a longer length.
If the convex hull of the input is degenerate (a line or point)
a LineString
or Point
is returned.
The minimum rectangle can be used as an extremely generalized representation for the given geometry.
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JTS Topology Suite version 1.12 | ||||||||
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