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LUCENE-7408: Detect degenerate case in lagrangian bounds computation when it pops up.

This commit is contained in:
Karl Wright 2016-08-10 02:29:15 -04:00
parent 153c270045
commit 5d06ca3da0
2 changed files with 60 additions and 39 deletions
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85
lucene/spatial3d/src/java/org/apache/lucene/spatial3d/geom/Plane.java
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@ -1359,8 +1359,6 @@ public class Plane extends Vector {
// m * [- 2*A*ab^2*r + 2*A^2*ab^2*r*q + 2*B^2*ab^2*r*q + 2*C^2*c^2*r*q] +
// [ab^2 - 2*A*ab^2*q + A^2*ab^2*q^2 + B^2*ab^2*q^2 + C^2*c^2*q^2] = 0
//System.err.println(" computing X bound");
// Useful subexpressions for this bound
final double q = A*abSquared*k;
final double qSquared = q * q;
@ -1400,29 +1398,33 @@ public class Plane extends Vector {
assert Math.abs(a * m1 * m1 + b * m1 + c) < MINIMUM_RESOLUTION;
final double m2 = (-b - sqrtResult) * commonDenom;
assert Math.abs(a * m2 * m2 + b * m2 + c) < MINIMUM_RESOLUTION;
final double l1 = r * m1 + q;
final double l2 = r * m2 + q;
// x = ((1 - l*A) * ab^2 ) / (2 * m)
// y = (-l*B * ab^2) / ( 2 * m)
// z = (-l*C * c^2)/ (2 * m)
final double denom1 = 0.5 / m1;
final double denom2 = 0.5 / m2;
final GeoPoint thePoint1 = new GeoPoint((1.0-l1*A) * abSquared * denom1, -l1*B * abSquared * denom1, -l1*C * cSquared * denom1);
final GeoPoint thePoint2 = new GeoPoint((1.0-l2*A) * abSquared * denom2, -l2*B * abSquared * denom2, -l2*C * cSquared * denom2);
//Math is not quite accurate enough for this
//assert planetModel.pointOnSurface(thePoint1): "Point1: "+thePoint1+"; Planetmodel="+planetModel+"; A="+A+" B="+B+" C="+C+" D="+D+" planetfcn="+
// (thePoint1.x*thePoint1.x*planetModel.inverseAb*planetModel.inverseAb + thePoint1.y*thePoint1.y*planetModel.inverseAb*planetModel.inverseAb + thePoint1.z*thePoint1.z*planetModel.inverseC*planetModel.inverseC);
//assert planetModel.pointOnSurface(thePoint2): "Point1: "+thePoint2+"; Planetmodel="+planetModel+"; A="+A+" B="+B+" C="+C+" D="+D+" planetfcn="+
// (thePoint2.x*thePoint2.x*planetModel.inverseAb*planetModel.inverseAb + thePoint2.y*thePoint2.y*planetModel.inverseAb*planetModel.inverseAb + thePoint2.z*thePoint2.z*planetModel.inverseC*planetModel.inverseC);
//assert evaluateIsZero(thePoint1): "Evaluation of point1: "+evaluate(thePoint1);
//assert evaluateIsZero(thePoint2): "Evaluation of point2: "+evaluate(thePoint2);
addPoint(boundsInfo, bounds, thePoint1);
addPoint(boundsInfo, bounds, thePoint2);
if (Math.abs(m1) >= MINIMUM_RESOLUTION || Math.abs(m2) >= MINIMUM_RESOLUTION) {
final double l1 = r * m1 + q;
final double l2 = r * m2 + q;
// x = ((1 - l*A) * ab^2 ) / (2 * m)
// y = (-l*B * ab^2) / ( 2 * m)
// z = (-l*C * c^2)/ (2 * m)
final double denom1 = 0.5 / m1;
final double denom2 = 0.5 / m2;
final GeoPoint thePoint1 = new GeoPoint((1.0-l1*A) * abSquared * denom1, -l1*B * abSquared * denom1, -l1*C * cSquared * denom1);
final GeoPoint thePoint2 = new GeoPoint((1.0-l2*A) * abSquared * denom2, -l2*B * abSquared * denom2, -l2*C * cSquared * denom2);
//Math is not quite accurate enough for this
//assert planetModel.pointOnSurface(thePoint1): "Point1: "+thePoint1+"; Planetmodel="+planetModel+"; A="+A+" B="+B+" C="+C+" D="+D+" planetfcn="+
// (thePoint1.x*thePoint1.x*planetModel.inverseAb*planetModel.inverseAb + thePoint1.y*thePoint1.y*planetModel.inverseAb*planetModel.inverseAb + thePoint1.z*thePoint1.z*planetModel.inverseC*planetModel.inverseC);
//assert planetModel.pointOnSurface(thePoint2): "Point1: "+thePoint2+"; Planetmodel="+planetModel+"; A="+A+" B="+B+" C="+C+" D="+D+" planetfcn="+
// (thePoint2.x*thePoint2.x*planetModel.inverseAb*planetModel.inverseAb + thePoint2.y*thePoint2.y*planetModel.inverseAb*planetModel.inverseAb + thePoint2.z*thePoint2.z*planetModel.inverseC*planetModel.inverseC);
//assert evaluateIsZero(thePoint1): "Evaluation of point1: "+evaluate(thePoint1);
//assert evaluateIsZero(thePoint2): "Evaluation of point2: "+evaluate(thePoint2);
addPoint(boundsInfo, bounds, thePoint1);
addPoint(boundsInfo, bounds, thePoint2);
} else {
// This is a plane of the form A=n B=0 C=0. We can set a bound only by noting the D value.
boundsInfo.addXValue(-D/A);
}
} else {
// No solutions
}
} else if (Math.abs(b) > MINIMUM_RESOLUTION_SQUARED) {
//System.err.println("Not x quadratic");
// a = 0, so m = - c / b
final double m = -c / b;
final double l = r * m + q;
@ -1569,24 +1571,29 @@ public class Plane extends Vector {
assert Math.abs(a * m1 * m1 + b * m1 + c) < MINIMUM_RESOLUTION;
final double m2 = (-b - sqrtResult) * commonDenom;
assert Math.abs(a * m2 * m2 + b * m2 + c) < MINIMUM_RESOLUTION;
final double l1 = r * m1 + q;
final double l2 = r * m2 + q;
// x = (-l*A * ab^2 ) / (2 * m)
// y = ((1.0-l*B) * ab^2) / ( 2 * m)
// z = (-l*C * c^2)/ (2 * m)
final double denom1 = 0.5 / m1;
final double denom2 = 0.5 / m2;
final GeoPoint thePoint1 = new GeoPoint(-l1*A * abSquared * denom1, (1.0-l1*B) * abSquared * denom1, -l1*C * cSquared * denom1);
final GeoPoint thePoint2 = new GeoPoint(-l2*A * abSquared * denom2, (1.0-l2*B) * abSquared * denom2, -l2*C * cSquared * denom2);
//Math is not quite accurate enough for this
//assert planetModel.pointOnSurface(thePoint1): "Point1: "+thePoint1+"; Planetmodel="+planetModel+"; A="+A+" B="+B+" C="+C+" D="+D+" planetfcn="+
// (thePoint1.x*thePoint1.x*planetModel.inverseAb*planetModel.inverseAb + thePoint1.y*thePoint1.y*planetModel.inverseAb*planetModel.inverseAb + thePoint1.z*thePoint1.z*planetModel.inverseC*planetModel.inverseC);
//assert planetModel.pointOnSurface(thePoint2): "Point2: "+thePoint2+"; Planetmodel="+planetModel+"; A="+A+" B="+B+" C="+C+" D="+D+" planetfcn="+
// (thePoint2.x*thePoint2.x*planetModel.inverseAb*planetModel.inverseAb + thePoint2.y*thePoint2.y*planetModel.inverseAb*planetModel.inverseAb + thePoint2.z*thePoint2.z*planetModel.inverseC*planetModel.inverseC);
//assert evaluateIsZero(thePoint1): "Evaluation of point1: "+evaluate(thePoint1);
//assert evaluateIsZero(thePoint2): "Evaluation of point2: "+evaluate(thePoint2);
addPoint(boundsInfo, bounds, thePoint1);
addPoint(boundsInfo, bounds, thePoint2);
if (Math.abs(m1) >= MINIMUM_RESOLUTION || Math.abs(m2) >= MINIMUM_RESOLUTION) {
final double l1 = r * m1 + q;
final double l2 = r * m2 + q;
// x = (-l*A * ab^2 ) / (2 * m)
// y = ((1.0-l*B) * ab^2) / ( 2 * m)
// z = (-l*C * c^2)/ (2 * m)
final double denom1 = 0.5 / m1;
final double denom2 = 0.5 / m2;
final GeoPoint thePoint1 = new GeoPoint(-l1*A * abSquared * denom1, (1.0-l1*B) * abSquared * denom1, -l1*C * cSquared * denom1);
final GeoPoint thePoint2 = new GeoPoint(-l2*A * abSquared * denom2, (1.0-l2*B) * abSquared * denom2, -l2*C * cSquared * denom2);
//Math is not quite accurate enough for this
//assert planetModel.pointOnSurface(thePoint1): "Point1: "+thePoint1+"; Planetmodel="+planetModel+"; A="+A+" B="+B+" C="+C+" D="+D+" planetfcn="+
// (thePoint1.x*thePoint1.x*planetModel.inverseAb*planetModel.inverseAb + thePoint1.y*thePoint1.y*planetModel.inverseAb*planetModel.inverseAb + thePoint1.z*thePoint1.z*planetModel.inverseC*planetModel.inverseC);
//assert planetModel.pointOnSurface(thePoint2): "Point2: "+thePoint2+"; Planetmodel="+planetModel+"; A="+A+" B="+B+" C="+C+" D="+D+" planetfcn="+
// (thePoint2.x*thePoint2.x*planetModel.inverseAb*planetModel.inverseAb + thePoint2.y*thePoint2.y*planetModel.inverseAb*planetModel.inverseAb + thePoint2.z*thePoint2.z*planetModel.inverseC*planetModel.inverseC);
//assert evaluateIsZero(thePoint1): "Evaluation of point1: "+evaluate(thePoint1);
//assert evaluateIsZero(thePoint2): "Evaluation of point2: "+evaluate(thePoint2);
addPoint(boundsInfo, bounds, thePoint1);
addPoint(boundsInfo, bounds, thePoint2);
} else {
// This is a plane of the form A=0 B=n C=0. We can set a bound only by noting the D value.
boundsInfo.addYValue(-D/B);
}
} else {
// No solutions
}

14
lucene/spatial3d/src/test/org/apache/lucene/spatial3d/geom/GeoCircleTest.java
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@ -405,4 +405,18 @@ public class GeoCircleTest extends LuceneTestCase {
assertTrue(solid.isWithin(gp));
}
@Test
public void testBoundsFailureCase2() {
final GeoCircle gc = GeoCircleFactory.makeGeoCircle(PlanetModel.WGS84, -2.7574435614238194E-13, 0.0, 1.5887859182593391);
final GeoPoint gp = new GeoPoint(PlanetModel.WGS84, 0.7980359504429014, 1.5964981068121482);
final XYZBounds bounds = new XYZBounds();
gc.getBounds(bounds);
System.out.println("Bounds = "+bounds);
System.out.println("Point = "+gp);
final XYZSolid solid = XYZSolidFactory.makeXYZSolid(PlanetModel.WGS84, bounds.getMinimumX(), bounds.getMaximumX(), bounds.getMinimumY(), bounds.getMaximumY(), bounds.getMinimumZ(), bounds.getMaximumZ());
assert gc.isWithin(gp)?solid.isWithin(gp):true;
}
}