Revision 6526
| trunk/extensions/extGeoProcessing/src/com/iver/cit/gvsig/geoprocess/impl/buffer/fmap/BufferVisitor.java | ||
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* |
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* $Id$ |
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* $Log$ |
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* Revision 1.2 2006-07-21 11:04:50 azabala |
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* Revision 1.3 2006-07-26 18:06:27 azabala |
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* fixed bug when internal buffers collapses geometries |
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* |
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* Revision 1.2 2006/07/21 11:04:50 azabala |
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* Unified createTask and process() methods |
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* |
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* Revision 1.1 2006/06/20 18:20:45 azabala |
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bufOp.setEndCapStyle(cap); |
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Geometry out = bufOp.getResultGeometry(distRing); |
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Geometry in = bufOp.getResultGeometry(-1 * distRing); |
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// Geometry out = BufferOp.bufferOp(inputParam, distRing, cap); |
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// Geometry in = BufferOp.bufferOp(inputParam, -1 * distRing, cap); |
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boolean collapsedInterior = verifyNilGeometry(in); |
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if(previousExteriorRing == null || previousInteriorRing == null){
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solution = out.difference(in); |
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if(collapsedInterior) |
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solution = out; |
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else |
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solution = out.difference(in); |
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}else{
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Geometry outRing = out.difference(previousExteriorRing); |
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Geometry inRing = previousInteriorRing.difference(in); |
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Geometry[] geomArray = new Geometry[]{outRing, inRing};
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solution = geomFact.createGeometryCollection(geomArray); |
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//FMap doesnt work with GeometryCollection, so we try |
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//to pass to a MultiPolygon. |
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ArrayList polygons = new ArrayList(); |
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Stack stack = new Stack(); |
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stack.push(solution); |
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while(stack.size() != 0){
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GeometryCollection geCol = |
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(GeometryCollection) stack.pop(); |
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for(int j = 0; j < geCol.getNumGeometries(); j++){
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Geometry geometry = geCol.getGeometryN(j); |
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if(geometry instanceof GeometryCollection) |
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stack.push(geometry); |
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if(geometry instanceof Polygon) |
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polygons.add(geometry); |
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}//for |
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}//for |
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Polygon[] pols = new Polygon[polygons.size()]; |
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polygons.toArray(pols); |
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MultiPolygon newSolution = geomFact.createMultiPolygon(pols); |
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solution = newSolution; |
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if(collapsedInterior){
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solution = out.difference(previousExteriorRing); |
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}else{
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Geometry outRing = out.difference(previousExteriorRing); |
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Geometry inRing = previousInteriorRing.difference(in); |
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Geometry[] geomArray = new Geometry[]{outRing, inRing};
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solution = geomFact.createGeometryCollection(geomArray); |
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//FMap doesnt work with GeometryCollection, so we try |
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//to pass to a MultiPolygon. |
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ArrayList polygons = new ArrayList(); |
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Stack stack = new Stack(); |
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stack.push(solution); |
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while(stack.size() != 0){
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GeometryCollection geCol = |
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(GeometryCollection) stack.pop(); |
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for(int j = 0; j < geCol.getNumGeometries(); j++){
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Geometry geometry = geCol.getGeometryN(j); |
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if(geometry instanceof GeometryCollection) |
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stack.push(geometry); |
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if(geometry instanceof Polygon) |
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polygons.add(geometry); |
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}//for |
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}//while |
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Polygon[] pols = new Polygon[polygons.size()]; |
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polygons.toArray(pols); |
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MultiPolygon newSolution = geomFact.createMultiPolygon(pols); |
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solution = newSolution; |
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} |
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}//else |
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numProcessed++; |
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IFeature feature = createFeature(solution, -1 * distRing, distRing); |
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resultsProcessor.processFeature(feature); |
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previousExteriorRing = out; |
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previousInteriorRing = in; |
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if(!collapsedInterior) |
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previousInteriorRing = in; |
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}//for |
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}//else |
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} |
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/** |
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* Creates a feature for a simple buffer process for polygons |
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* (the result feature will have a field with the buffer distance) |
Also available in: Unified diff