ConcaveHull for Points #823
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Signed-off-by: Martin Davis <mtnclimb@gmail.com>
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Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
dr-jts
changed the title
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Handle degenerate cases Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
pramsey
reviewed
Dec 24, 2021
| */ | ||
| public Geometry getHull() { | ||
| if (inputGeometry.isEmpty()) { | ||
| return geomFactory.createPolygon(); |
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If the input geometry is a POLYGON Z, the output should respect the dimensionality. (Yeah.)
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Yes, I realize this is something that needs work. Will do that soon.
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
add function for length factor with holes Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
Signed-off-by: Martin Davis <mtnclimb@gmail.com>
dr-jts
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dr-jts
changed the title
This was referenced Jan 20, 2022
pramsey
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Jan 21, 2022
Port locationtech/jts#823, closes GH-549. Adds in CAPI function, ``` extern GEOSGeometry GEOS_DLL *GEOSConcaveHull( const GEOSGeometry* g, double ratio, unsigned int allowHoles); ``` At ratio 1.0, the concave hull == convex hull. Lower numbers promote more concavity.
Just worked for me... ? |
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Adds a
ConcaveHullclass to compute concave hulls of point sets.The shape of the computed hull can be specified by one of the following criteria:
Concave hulls are single connected polygons . Optionally they may be allowed to contain holes.
Examples
Concave Hull
Reconstruction of a "C" glyph from random points
Reconstruction of an "A" glyph from random points
The famous Flickr example:
The almost-famous S example
Concaveman test fixture
Signed-off-by: Martin Davis mtnclimb@gmail.com