com.vividsolutions.jts.geom.Geometry.getGeometryN()方法的使用及代码示例

x33g5p2x  于2022-01-19 转载在 其他  
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本文整理了Java中com.vividsolutions.jts.geom.Geometry.getGeometryN()方法的一些代码示例，展示了Geometry.getGeometryN()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Geometry.getGeometryN()方法的具体详情如下：
包路径：com.vividsolutions.jts.geom.Geometry
类名称：Geometry
方法名：getGeometryN

Geometry.getGeometryN介绍

[英]Returns an element Geometry from a GeometryCollection(or this, if the geometry is not a collection).
[中]从GeometryCollection返回元素几何体（如果几何体不是集合，则返回this。

代码示例

代码示例来源：origin: opentripplanner/OpenTripPlanner

  1. public static LinearLocation getEndLocation(Geometry linear) {
  2.     //the version in LinearLocation is broken
  3.     
  4.     int lastComponentIndex = linear.getNumGeometries() - 1;
  5.     LineString lastLine = (LineString) linear.getGeometryN(lastComponentIndex);
  6.     int lastSegmentIndex = lastLine.getNumPoints() - 1;
  7.     return new LinearLocation(lastComponentIndex, lastSegmentIndex, 0.0);
  8.   }
  9. }

代码示例来源：origin: osmandapp/Osmand

  1. private static FeatureStats pointStats(Geometry geom) {
  2.   final FeatureStats featureStats = new FeatureStats();
  3.   final HashSet<Point> pointSet = new HashSet<>(geom.getNumPoints());
  4.   featureStats.totalPts = geom.getNumPoints();
  5.   for(int i = 0; i < geom.getNumGeometries(); ++i) {
  6.     final Point p = (Point) geom.getGeometryN(i);
  7.     featureStats.repeatedPts += pointSet.add(p) ? 0 : 1;
  8.   }
  9.   return featureStats;
  10. }

代码示例来源：origin: osmandapp/Osmand

  1. nextGeomCount = nextGeom.getNumGeometries();
  2. for(int i = 0; i < nextGeomCount; ++i) {
  3.   geomStack.push(nextGeom.getGeometryN(i));

代码示例来源：origin: osmandapp/Osmand

  1. private static FeatureStats lineStats(Geometry geom) {
  2.   final FeatureStats featureStats = new FeatureStats();
  3.   for(int i = 0; i < geom.getNumGeometries(); ++i) {
  4.     final LineString lineString = (LineString) geom.getGeometryN(i);
  5.     featureStats.totalPts += lineString.getNumPoints();
  6.     featureStats.repeatedPts += checkRepeatedPoints2d(lineString);
  7.   }
  8.   return featureStats;
  9. }

代码示例来源：origin: opentripplanner/OpenTripPlanner

  1. public void setGeom(Geometry geom) throws EmptyPolygonException, UnsupportedGeometryException {
  2.   if (geom instanceof MultiPolygon) {
  3.     if (geom.isEmpty()) {
  4.       throw new EmptyPolygonException();
  5.     }
  6.     if (geom.getNumGeometries() > 1) {
  7.       // LOG.warn("Multiple polygons in MultiPolygon, using only the first.");
  8.       // TODO percolate this warning up somehow
  9.     }
  10.     this.geom = geom.getGeometryN(0);
  11.   } else if( geom instanceof Point || geom instanceof Polygon){
  12.     this.geom = geom;
  13.   } else {
  14.     throw new UnsupportedGeometryException( "Non-point, non-polygon Geometry, not supported." );
  15.   }
  16.   // cache a representative point
  17.   Point point = geom.getCentroid();
  18.   this.lat = point.getY();
  19.   this.lon = point.getX();
  20. }

代码示例来源：origin: opentripplanner/OpenTripPlanner

  1. /**
  2.  * Computes the angle of the last segment of a LineString or MultiLineString in radians clockwise from North
  3.  * in the range (-PI, PI).
  4.  * @param geometry a LineString or a MultiLineString
  5.  */
  6. public static synchronized double getLastAngle(Geometry geometry) {
  7.   LineString line;
  8.   if (geometry instanceof MultiLineString) {
  9.     line = (LineString) geometry.getGeometryN(geometry.getNumGeometries() - 1);
  10.   } else {
  11.     assert geometry instanceof LineString;
  12.     line = (LineString) geometry;
  13.   }
  14.   int numPoints = line.getNumPoints();
  15.   Coordinate coord0 = line.getCoordinateN(numPoints - 2);
  16.   Coordinate coord1 = line.getCoordinateN(numPoints - 1);
  17.   int i = numPoints - 3;
  18.   int minDistance = 10;  // Meters        
  19.   while (SphericalDistanceLibrary.fastDistance(coord0, coord1) < minDistance && i >= 0) {
  20.     coord0 = line.getCoordinateN(i--);
  21.   }
  22.   double az = getAzimuth(coord0, coord1);
  23.   return az * Math.PI / 180;
  24. }

代码示例来源：origin: osmandapp/Osmand

  1. private static FeatureStats polyStats(Geometry geom) {
  2.   final FeatureStats featureStats = new FeatureStats();
  3.   for(int i = 0; i < geom.getNumGeometries(); ++i) {
  4.     final Polygon nextPoly = (Polygon) geom.getGeometryN(i);
  5.     // Stats: exterior ring
  6.     final LineString exteriorRing = nextPoly.getExteriorRing();
  7.     featureStats.totalPts += exteriorRing.getNumPoints();
  8.     featureStats.repeatedPts += checkRepeatedPoints2d(exteriorRing);
  9.     // Stats: interior rings
  10.     for(int ringIndex = 0; ringIndex < nextPoly.getNumInteriorRing(); ++ringIndex) {
  11.       final LineString nextInteriorRing = nextPoly.getInteriorRingN(ringIndex);
  12.       featureStats.totalPts += nextInteriorRing.getNumPoints();
  13.       featureStats.repeatedPts += checkRepeatedPoints2d(nextInteriorRing);
  14.     }
  15.   }
  16.   return featureStats;
  17. }

代码示例来源：origin: osmandapp/Osmand

  1. for (int i = 0; i < geom.getNumGeometries(); ++i) {
  2.   mvtGeom.addAll(linesToGeomCmds(geom.getGeometryN(i), mvtClosePath, cursor, 1));
  3. for(int i = 0; i < geom.getNumGeometries(); ++i) {
  4.   final Polygon nextPoly = (Polygon) geom.getGeometryN(i);
  5.   final List<Integer> nextPolyGeom = new ArrayList<>();
  6.   boolean valid = true;

代码示例来源：origin: opentripplanner/OpenTripPlanner

  1. /**
  2.    * Computes the angle from the first point to the last point of a LineString or MultiLineString. TODO: put this method into
  3.    * org.opentripplanner.common.geometry.DirectionUtils
  4.    * 
  5.    * @param geometry a LineString or a MultiLineString
  6.    * 
  7.    * @return
  8.    */
  9.   public synchronized double getFirstToLastSegmentAngle(Geometry geometry) {
  10.     LineString line;
  11.     if (geometry instanceof MultiLineString) {
  12.       line = (LineString) geometry.getGeometryN(geometry.getNumGeometries() - 1);
  13.     } else {
  14.       assert geometry instanceof LineString;
  15.       line = (LineString) geometry;
  16.     }
  17.     int numPoints = line.getNumPoints();
  18.     Coordinate coord0 = line.getCoordinateN(0);
  19.     Coordinate coord1 = line.getCoordinateN(numPoints - 1);
  20.     int i = numPoints - 3;
  21.     while (SphericalDistanceLibrary.fastDistance(coord0, coord1) < 10 && i >= 0) {
  22.       coord1 = line.getCoordinateN(i--);
  23.     }
  25.     geodeticCalculator.setStartingGeographicPoint(coord0.x, coord0.y);
  26.     geodeticCalculator.setDestinationGeographicPoint(coord1.x, coord1.y);
  27.     return geodeticCalculator.getAzimuth() * Math.PI / 180;
  28.   }
  29. }

代码示例来源：origin: com.vividsolutions/jts

  1. private void computeInteracting()
  2. {
  3.   for (int i = 0; i < g0.getNumGeometries(); i++) {
  4.     Geometry elem = g0.getGeometryN(i);
  5.     interacts0[i] = computeInteracting(elem);
  6.   }
  7. }

代码示例来源：origin: com.vividsolutions/jts

  1. private Geometry extractElements(Geometry geom, 
  2.     boolean[] interacts, boolean isInteracting)
  3. {
  4.   List extractedGeoms = new ArrayList();
  5.   for (int i = 0; i < geom.getNumGeometries(); i++) { 
  6.     Geometry elem = geom.getGeometryN(i);
  7.     if (interacts[i] == isInteracting)
  8.       extractedGeoms.add(elem);
  9.   }
  10.   return geomFactory.buildGeometry(extractedGeoms);
  11. }

代码示例来源：origin: com.vividsolutions/jts

  1. private void extractElements(Geometry geom, List elems)
  2. {
  3.  if (geom == null)
  4.   return;
  5.  
  6.  for (int i = 0; i < geom.getNumGeometries(); i++) {
  7.   Geometry elemGeom = geom.getGeometryN(i);
  8.   if (skipEmpty && elemGeom.isEmpty())
  9.    continue;
  10.   elems.add(elemGeom);
  11.  }
  12. }

代码示例来源：origin: com.vividsolutions/jts

  1. /**
  2.  * Sets the value of this location to
  3.  * refer to the end of a linear geometry.
  4.  *
  5.  * @param linear the linear geometry to use to set the end
  6.  */
  7. public void setToEnd(Geometry linear)
  8. {
  9.  componentIndex = linear.getNumGeometries() - 1;
  10.  LineString lastLine = (LineString) linear.getGeometryN(componentIndex);
  11.  segmentIndex = lastLine.getNumPoints() - 1;
  12.  segmentFraction = 1.0;
  13. }

代码示例来源：origin: com.vividsolutions/jts

  1. /**
  2.  * Tests whether a geometry consists of a single polygon with no holes.
  3.  *  
  4.  * @return true if the geometry is a single polygon with no holes
  5.  */
  6.  private boolean isSingleShell(Geometry geom)
  7.  {
  8.  // handles single-element MultiPolygons, as well as Polygons
  9.    if (geom.getNumGeometries() != 1) return false;
  10.    
  11.    Polygon poly = (Polygon) geom.getGeometryN(0);
  12.    int numHoles = poly.getNumInteriorRing();
  13.    if (numHoles == 0) return true;
  14.    return false;
  15.  }

代码示例来源：origin: com.vividsolutions/jts

  1. /**
  2.  * Semantics for GeometryCollection is 
  3.  * simple iff all components are simple.
  4.  * 
  5.  * @param geom
  6.  * @return true if the geometry is simple
  7.  */
  8. private boolean isSimpleGeometryCollection(Geometry geom)
  9. {
  10.  for (int i = 0; i < geom.getNumGeometries(); i++ ) {
  11.   Geometry comp = geom.getGeometryN(i);
  12.   if (! computeSimple(comp))
  13.    return false;
  14.  }
  15.  return true;
  16. }

代码示例来源：origin: com.vividsolutions/jts

  1. private void computeMinDistanceOneMulti(Geometry g0, Geometry g1, boolean flip) {
  2.   if (g1 instanceof GeometryCollection) {
  3.     int n = g1.getNumGeometries();
  4.     for (int i = 0; i < n; i++) {
  5.       Geometry g = g1.getGeometryN(i);
  6.       computeMinDistanceOneMulti(g0, g, flip);
  7.       if (isDone)	return;
  8.     }
  9.   }
  10.   else {
  11.     computeMinDistance(g0, g1, flip);
  12.   }
  13. }

代码示例来源：origin: com.vividsolutions/jts

  1. private Geometry extractByEnvelope(Envelope env, Geometry geom, 
  2.     List disjointGeoms)
  3. {
  4.   List intersectingGeoms = new ArrayList();
  5.   for (int i = 0; i < geom.getNumGeometries(); i++) { 
  6.     Geometry elem = geom.getGeometryN(i);
  7.     if (elem.getEnvelopeInternal().intersects(env))
  8.       intersectingGeoms.add(elem);
  9.     else
  10.       disjointGeoms.add(elem);
  11.   }
  12.   return geomFactory.buildGeometry(intersectingGeoms);
  13. }

代码示例来源：origin: com.vividsolutions/jts

  1. /**
  2.    * Input is assumed to be a multiGeometry
  3.    * in which every component has its userData
  4.    * set to be a Coordinate which is the key to the output data.
  5.    * The Coordinate is used to determine
  6.    * the output data object to be written back into the component. 
  7.    * 
  8.    * @param targetGeom
  9.    */
  10.   public void transferData(Geometry targetGeom)
  11.   {
  12.     for (int i = 0; i < targetGeom.getNumGeometries(); i++) {
  13.       Geometry geom = targetGeom.getGeometryN(i);
  14.       Coordinate vertexKey = (Coordinate) geom.getUserData();
  15.       if (vertexKey == null) continue;
  16.       geom.setUserData(coordDataMap.get(vertexKey));
  17.     }
  18.   }
  19. }

代码示例来源：origin: com.vividsolutions/jts

  1. private boolean computeInteracting(Geometry elem0)
  2. {
  3.   boolean interactsWithAny = false;
  4.   for (int i = 0; i < g1.getNumGeometries(); i++) {
  5.     Geometry elem1 = g1.getGeometryN(i);
  6.     boolean interacts = elem1.getEnvelopeInternal().intersects(elem0.getEnvelopeInternal());
  7.     if (interacts) interacts1[i] = true;
  8.     if (interacts) 
  9.       interactsWithAny = true;
  10.   }
  11.   return interactsWithAny;
  12. }

代码示例来源：origin: com.vividsolutions/jts

  1. public void loadSourceGeometries(Geometry geomColl)
  2. {
  3.   for (int i = 0; i < geomColl.getNumGeometries(); i++) {
  4.     Geometry geom = geomColl.getGeometryN(i);
  5.     loadVertices(geom.getCoordinates(), geom.getUserData());
  6.   }
  7. }

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