/**
* Compute the width information for a ring of {@link Coordinate}s. Leaves the width information
* in the instance variables.
*
* @param pts
*/
private void computeConvexRingMinDiameter(Coordinate[] pts) {
// for each segment in the ring
minWidth = Double.MAX_VALUE;
int currMaxIndex = 1;
LineSegment seg = new LineSegment();
// compute the max distance for all segments in the ring, and pick the minimum
for (int i = 0; i < pts.length - 1; i++) {
seg.p0 = pts[i];
seg.p1 = pts[i + 1];
currMaxIndex = findMaxPerpDistance(pts, seg, currMaxIndex);
}
}
private void computeWidthConvex(Geometry convexGeom) {
// System.out.println("Input = " + geom);
if (convexGeom instanceof Polygon)
convexHullPts = ((Polygon) convexGeom).getExteriorRing().getCoordinates();
else convexHullPts = convexGeom.getCoordinates();
// special cases for lines or points or degenerate rings
if (convexHullPts.length == 0) {
minWidth = 0.0;
minWidthPt = null;
minBaseSeg = null;
} else if (convexHullPts.length == 1) {
minWidth = 0.0;
minWidthPt = convexHullPts[0];
minBaseSeg.p0 = convexHullPts[0];
minBaseSeg.p1 = convexHullPts[0];
} else if (convexHullPts.length == 2 || convexHullPts.length == 3) {
minWidth = 0.0;
minWidthPt = convexHullPts[0];
minBaseSeg.p0 = convexHullPts[0];
minBaseSeg.p1 = convexHullPts[1];
} else computeConvexRingMinDiameter(convexHullPts);
}
