Mercurial > dive4elements > river
changeset 642:2dbbb5be30a1
Re-eanbled the calculation of the backjump correction.
flys-artifacts/trunk@2026 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Fri, 27 May 2011 16:52:37 +0000 |
| parents | ab9b6cae0d0d |
| children | a9bde508824a |
| files | flys-artifacts/ChangeLog flys-artifacts/src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java |
| diffstat | 4 files changed, 131 insertions(+), 38 deletions(-) [+] |
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--- a/flys-artifacts/ChangeLog Fri May 27 10:09:46 2011 +0000 +++ b/flys-artifacts/ChangeLog Fri May 27 16:52:37 2011 +0000 @@ -1,3 +1,14 @@ +2011-05-27 Sascha L. Teichmann <sascha.teichmann@intevation.de> + + * src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java: + Make it work independent of river flow direction. + + * src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java: + Fixed bug in ordering segments + + * src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Re-enabled + calculation of the back jump correction. Fixed more flow direction issues. + 2011-05-27 Ingo Weinzierl <ingo@intevation.de> * src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java Fri May 27 10:09:46 2011 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java Fri May 27 16:52:37 2011 +0000 @@ -497,6 +497,28 @@ return wqkms; } + private static final double [] getBounds(double [][] segments) { + boolean down = true; + double min = Double.MAX_VALUE; + double max = -Double.MAX_VALUE; + + for (double [] segment: segments) { + if (down = segment[0] > segment[1]) { + if (segment[1] < min) min = segment[1]; + if (segment[0] > max) max = segment[0]; + } + else { + if (segment[0] < min) min = segment[0]; + if (segment[1] > max) max = segment[1]; + } + } + + return down + ? new double [] { max, min } + : new double [] { min, max }; + + } + /** * Returns the data computed by the discharge longitudinal section * computation. @@ -554,12 +576,12 @@ double [] boundKms; if (segments.length == 2) { - boundKms = new double [] { segments[0][0], segments[1][1] }; + boundKms = getBounds(segments); } else { TDoubleArrayList bounds = new TDoubleArrayList(); - bounds.add(segments[0][0]); + bounds.add(Math.min(segments[0][0], segments[0][1])); for (int i = 1; i < segments.length-1; ++i) { double [] segment = segments[i]; @@ -576,7 +598,10 @@ } } - bounds.add(segments[segments.length-1][1]); + bounds.add(Math.max( + segments[segments.length-1][0], + segments[segments.length-1][1])); + boundKms = bounds.toNativeArray(); } @@ -654,16 +679,14 @@ wst.interpolate(okms, ows, oqs, qPosition, remap); - /* BackJumpCorrector bjc = new BackJumpCorrector(); if (bjc.doCorrection(okms, ows)) { logger.debug("Discharge longitudinal section has backjumps."); results.add(new WQCKms(okms, oqs, ows, bjc.getCorrected())); } else { - */ results.add(new WQKms(okms, oqs, ows)); - //} + } } WQKms [] wqkms = results.toArray(new WQKms[results.size()]);
--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java Fri May 27 10:09:46 2011 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java Fri May 27 16:52:37 2011 +0000 @@ -38,41 +38,33 @@ return corrected; } - private static final boolean isIncreasing(double [] ws) { - int inc = 0; - int dec = 0; - int sweet = (ws.length-1)/2; - for (int i = 1; i < ws.length; ++i) { - if (ws[i] > ws[i-1]) { - if (++inc > sweet) { - return true; - } - } - else if (++dec > sweet) { - return false; - } + public boolean doCorrection(double [] km, double [] ws) { + + boolean wsUp = isIncreasing(ws); + + if (wsUp) { + km = swapClone(km); + ws = swapClone(ws); } - return inc > sweet; - } - - public boolean doCorrection(double [] km, double [] ws) { - boolean isIncreasing = isIncreasing(ws); - if (isIncreasing) { - // mirror along x axis to simulate decreasing values - ws = (double [])ws.clone(); - for (int i = 0; i < ws.length; ++i) { - ws[i] = -ws[i]; - } + boolean kmUp = isIncreasing(km); + + if (!kmUp) { + km = sumDiffs(km); + } + + if (log.isDebugEnabled()) { + log.debug("BackJumpCorrector.doCorrection ------- enter"); + log.debug(" km increasing: " + isIncreasing(km)); + log.debug(" ws increasing: " + isIncreasing(ws)); + log.debug("BackJumpCorrector.doCorrection ------- leave"); } boolean hasBackJumps = doCorrectionClean(km, ws); - if (hasBackJumps && isIncreasing) { + if (hasBackJumps && wsUp) { // mirror back - for (int i = 0; i < corrected.length; ++i) { - corrected[i] = -corrected[i]; - } + swap(corrected); } return hasBackJumps; @@ -134,7 +126,7 @@ } if (back < 0) { - log.debug("run over left border"); + //log.debug("run over left border"); // fill with same as ws[i] for (int j = 0; j < i; ++j) { ws[j] = ws[i]; @@ -195,6 +187,12 @@ interpolator = new SplineInterpolator(); } + if (log.isDebugEnabled()) { + for (int j = 0; j < x.length; ++j) { + log.debug(" " + x[j] + " -> " + y[j]); + } + } + PolynomialSplineFunction spline = interpolator.interpolate(x, y); try { @@ -224,5 +222,64 @@ return !backjumps.isEmpty(); } + + public static final boolean isIncreasing(double [] array) { + int inc = 0; + int dec = 0; + int sweet = (array.length-1)/2; + for (int i = 1; i < array.length; ++i) { + if (array[i] > array[i-1]) { + if (++inc > sweet) { + return true; + } + } + else if (++dec > sweet) { + return false; + } + } + return inc > sweet; + } + + public static final double [] swap(double [] array) { + int lo = 0; + int hi = array.length-1; + while (hi > lo) { + double t = array[lo]; + array[lo] = array[hi]; + array[hi] = t; + ++lo; + --hi; + } + + return array; + } + + public static final double [] swapClone(double [] array) { + double [] out = new double[array.length]; + int lo = 0; + + int hi = array.length-1; + while (hi > lo) { + out[lo] = array[hi]; + out[hi] = array[lo]; + ++lo; + --hi; + } + return out; + } + + public static final double [] sumDiffs(double [] in) { + double [] out = new double[in.length]; + + if (out.length > 0) { + out[0] = 0d; + } + + for (int i = 1; i < out.length; ++i) { + out[i] = out[i-1] + Math.abs(in[i-1] - in[i]); + } + + return out; + } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java Fri May 27 10:09:46 2011 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java Fri May 27 16:52:37 2011 +0000 @@ -44,7 +44,7 @@ private int order; public GaugeOrder(boolean up) { - order = up ? 1 : 1; + order = up ? 1 : -1; } public int compare(Gauge a, Gauge b) { @@ -149,13 +149,15 @@ } else { Collections.sort(gauges, GAUGE_DOWN); + rangeFrom = dist[1]; + rangeTo = dist[0]; for (Gauge gauge: gauges) { Range range = gauge.getRange(); double lower = range.getA().doubleValue(); double upper = range.getB().doubleValue(); - double to = upper < rangeTo ? rangeTo : upper; - double from = lower > rangeFrom ? rangeFrom : lower; + double from = lower < rangeFrom ? rangeFrom : lower; + double to = upper > rangeTo ? rangeTo : upper; elements[idx++] = createItem( cr, new String[] { to + ";" + from, ""});