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| 1 |  |  |  |  |  |  | /********************************************************************** | 
| 2 |  |  |  |  |  |  | * | 
| 3 |  |  |  |  |  |  | * GEOS - Geometry Engine Open Source | 
| 4 |  |  |  |  |  |  | * http://geos.osgeo.org | 
| 5 |  |  |  |  |  |  | * | 
| 6 |  |  |  |  |  |  | * Copyright (C) 2006 Refractions Research Inc. | 
| 7 |  |  |  |  |  |  | * | 
| 8 |  |  |  |  |  |  | * This is free software; you can redistribute and/or modify it under | 
| 9 |  |  |  |  |  |  | * the terms of the GNU Lesser General Public Licence as published | 
| 10 |  |  |  |  |  |  | * by the Free Software Foundation. | 
| 11 |  |  |  |  |  |  | * See the COPYING file for more information. | 
| 12 |  |  |  |  |  |  | * | 
| 13 |  |  |  |  |  |  | * | 
| 14 |  |  |  |  |  |  | ********************************************************************** | 
| 15 |  |  |  |  |  |  | * | 
| 16 |  |  |  |  |  |  | * Last port: noding/SegmentStringUtil.java rev. 1.2 (JTS-1.9) | 
| 17 |  |  |  |  |  |  | * | 
| 18 |  |  |  |  |  |  | **********************************************************************/ | 
| 19 |  |  |  |  |  |  |  | 
| 20 |  |  |  |  |  |  | #ifndef GEOS_NODING_SEGMENTSTRINGUTIL_H | 
| 21 |  |  |  |  |  |  | #define GEOS_NODING_SEGMENTSTRINGUTIL_H | 
| 22 |  |  |  |  |  |  |  | 
| 23 |  |  |  |  |  |  | #include | 
| 24 |  |  |  |  |  |  | #include | 
| 25 |  |  |  |  |  |  | #include | 
| 26 |  |  |  |  |  |  | #include | 
| 27 |  |  |  |  |  |  |  | 
| 28 |  |  |  |  |  |  | namespace geos { | 
| 29 |  |  |  |  |  |  | namespace noding { // geos::noding | 
| 30 |  |  |  |  |  |  |  | 
| 31 |  |  |  |  |  |  | /** \brief | 
| 32 |  |  |  |  |  |  | * Utility methods for processing {@link SegmentString}s. | 
| 33 |  |  |  |  |  |  | * | 
| 34 |  |  |  |  |  |  | * @author Martin Davis | 
| 35 |  |  |  |  |  |  | * | 
| 36 |  |  |  |  |  |  | */ | 
| 37 |  |  |  |  |  |  | class SegmentStringUtil | 
| 38 |  |  |  |  |  |  | { | 
| 39 |  |  |  |  |  |  | public: | 
| 40 |  |  |  |  |  |  | /** \brief | 
| 41 |  |  |  |  |  |  | * Extracts all linear components from a given {@link Geometry} | 
| 42 |  |  |  |  |  |  | * to {@link SegmentString}s. | 
| 43 |  |  |  |  |  |  | * | 
| 44 |  |  |  |  |  |  | * The SegmentString data item is set to be the source Geometry. | 
| 45 |  |  |  |  |  |  | * | 
| 46 |  |  |  |  |  |  | * @param geom the geometry to extract from | 
| 47 |  |  |  |  |  |  | * @param segStr a List of SegmentStrings (output parameter). | 
| 48 |  |  |  |  |  |  | *               Ownership of elements pushed to the vector | 
| 49 |  |  |  |  |  |  | *               is transferred to caller. | 
| 50 |  |  |  |  |  |  | */ | 
| 51 | 1 |  |  |  |  |  | static void extractSegmentStrings(const geom::Geometry * g, | 
| 52 |  |  |  |  |  |  | SegmentString::ConstVect& segStr) | 
| 53 |  |  |  |  |  |  | { | 
| 54 | 2 |  |  |  |  |  | geom::LineString::ConstVect lines; | 
| 55 | 1 | 50 |  |  |  |  | geom::util::LinearComponentExtracter::getLines(*g, lines); | 
| 56 |  |  |  |  |  |  |  | 
| 57 | 2 | 100 |  |  |  |  | for (std::size_t i=0, n=lines.size(); i | 
| 58 |  |  |  |  |  |  | { | 
| 59 | 1 |  |  |  |  |  | geom::LineString* line = (geom::LineString*)(lines[i]); | 
| 60 |  |  |  |  |  |  |  | 
| 61 |  |  |  |  |  |  | // we take ownership of the coordinates here | 
| 62 |  |  |  |  |  |  | // TODO: check if this can be optimized by getting | 
| 63 |  |  |  |  |  |  | //       the internal CS. | 
| 64 | 1 | 50 |  |  |  |  | geom::CoordinateSequence* pts = line->getCoordinates(); | 
| 65 |  |  |  |  |  |  |  | 
| 66 | 1 | 50 |  |  |  |  | segStr.push_back(new NodedSegmentString(pts, g)); | 
|  |  | 50 |  |  |  |  |  | 
| 67 |  |  |  |  |  |  | } | 
| 68 | 1 |  |  |  |  |  | } | 
| 69 |  |  |  |  |  |  |  | 
| 70 |  |  |  |  |  |  | }; | 
| 71 |  |  |  |  |  |  |  | 
| 72 |  |  |  |  |  |  | } // geos::noding | 
| 73 |  |  |  |  |  |  | } // geos | 
| 74 |  |  |  |  |  |  |  | 
| 75 |  |  |  |  |  |  | #endif // GEOS_NODING_SEGMENTSTRINGUTIL_H |