root / trunk / extensions / extRasterTools-SE / src / org / gvsig / rastertools / vectorizacion / process / ContourLinesProcess.java @ 23467
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2005 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*/
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package org.gvsig.rastertools.vectorizacion.process; |
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import java.io.File; |
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import java.sql.Types; |
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import org.gvsig.fmap.raster.layers.FLyrRasterSE; |
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import org.gvsig.raster.RasterProcess; |
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import org.gvsig.raster.buffer.RasterBufferInvalidException; |
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import org.gvsig.raster.datastruct.Extent; |
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import org.gvsig.raster.grid.Grid; |
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import org.gvsig.raster.grid.GridException; |
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import org.gvsig.raster.grid.GridExtent; |
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import org.gvsig.raster.util.RasterToolsUtil; |
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import com.hardcode.gdbms.driver.exceptions.InitializeWriterException; |
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import com.hardcode.gdbms.engine.values.Value; |
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import com.hardcode.gdbms.engine.values.ValueFactory; |
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import com.iver.cit.gvsig.exceptions.visitors.StartWriterVisitorException; |
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import com.iver.cit.gvsig.exceptions.visitors.StopWriterVisitorException; |
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import com.iver.cit.gvsig.fmap.core.DefaultFeature; |
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import com.iver.cit.gvsig.fmap.core.FPolyline2D; |
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import com.iver.cit.gvsig.fmap.core.FShape; |
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import com.iver.cit.gvsig.fmap.core.GeneralPathX; |
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import com.iver.cit.gvsig.fmap.core.IGeometry; |
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import com.iver.cit.gvsig.fmap.core.ShapeFactory; |
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import com.iver.cit.gvsig.fmap.drivers.DXFLayerDefinition; |
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import com.iver.cit.gvsig.fmap.drivers.FieldDescription; |
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import com.iver.cit.gvsig.fmap.drivers.LayerDefinition; |
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import com.iver.cit.gvsig.fmap.drivers.SHPLayerDefinition; |
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import com.iver.cit.gvsig.fmap.edition.DefaultRowEdited; |
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import com.iver.cit.gvsig.fmap.edition.IRowEdited; |
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import com.iver.cit.gvsig.fmap.edition.IWriter; |
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import com.iver.cit.gvsig.fmap.edition.writers.dxf.DxfFieldsMapping; |
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import com.iver.cit.gvsig.fmap.edition.writers.dxf.DxfWriter; |
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import com.iver.cit.gvsig.fmap.edition.writers.shp.ShpWriter; |
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/**
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* Este proceso vectoriza la capa de entrada que debe estar ya preprocesada.
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* 03/07/2008
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* @author Victor Olaya (volaya@ya.com)
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* @author Nacho Brodin nachobrodin@gmail.com
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*/
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public class ContourLinesProcess extends RasterProcess { |
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private FLyrRasterSE lyr = null; |
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private double min = 0; |
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private double max = 0; |
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private double distance = 0; |
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private Extent extent = null; |
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private String fileName = null; |
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private char[][] m_Row = null; |
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private char[][] m_Col = null; |
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private Grid grid = null; |
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private IWriter writer = null; |
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private int m_iGeometry = 0; |
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private double percent = 0; |
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private class NextContourInfo { |
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public int iDir; |
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public int x; |
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public int y; |
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public boolean doRow; |
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} |
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/**
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* Par?metros obligatorios al proceso:
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* <UL>
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* <LI></LI>
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* <LI>filename: Nombre del fichero de salida</LI>
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* <LI></LI>
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* <LI></LI>
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* <LI></LI>
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* <LI></LI>
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* </UL>
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*/
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public void init() { |
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lyr = getLayerParam("layer");
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fileName = getStringParam("filename");
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min = getDoubleParam("min");
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max = getDoubleParam("max");
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distance = getDoubleParam("distance");
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extent = getExtentParam("extent");
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String sFields[] = new String[2]; |
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sFields[0] = "ID"; |
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sFields[1] = lyr.getName();
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LayerDefinition tableDef = null;
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if(fileName.endsWith(".dxf")) { |
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writer = new DxfWriter();
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((DxfWriter)writer).setFile(new File(fileName)); |
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((DxfWriter)writer).setProjection(lyr.getProjection()); |
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tableDef = new DXFLayerDefinition();
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DxfFieldsMapping fieldsMapping = new DxfFieldsMapping();
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((DxfWriter)writer).setFieldMapping(fieldsMapping); |
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} |
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if(fileName.endsWith(".shp")) { |
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writer = new ShpWriter();
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((ShpWriter)writer).setFile(new File(fileName)); |
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tableDef = new SHPLayerDefinition();
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} |
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tableDef.setShapeType(FShape.LINE); |
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int types[] = {Types.DOUBLE, Types.DOUBLE}; |
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FieldDescription[] fields = new FieldDescription[sFields.length]; |
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for (int i = 0; i < fields.length; i++) { |
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fields[i] = new FieldDescription();
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fields[i].setFieldName(sFields[i]); |
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fields[i].setFieldType(types[i]); |
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fields[i].setFieldLength(getDataTypeLength(types[i])); |
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fields[i].setFieldDecimalCount(5);
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} |
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tableDef.setFieldsDesc(fields); |
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tableDef.setName(fileName); |
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try {
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writer.initialize(tableDef); |
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writer.preProcess(); |
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} catch (InitializeWriterException e) {
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RasterToolsUtil.messageBoxError("error_init_vectlayer", null, e); |
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} catch (StartWriterVisitorException e) {
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RasterToolsUtil.messageBoxError("error_init_vectlayer", null, e); |
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} |
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} |
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/**
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* Tarea de recorte
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*/
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public void process() throws InterruptedException { |
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GridExtent ge = null;
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if(extent != null) |
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ge = new GridExtent(extent, lyr.getCellSize());
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try {
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grid = new Grid(lyr.getDataSource(), new int[]{0}, ge); |
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if( min <= max && distance > 0 ) { |
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if( min < grid.getMinValue() )
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min += distance * (int)((grid.getMinValue() - min) / distance);
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if( max > grid.getMaxValue() )
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max = grid.getMaxValue(); |
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createContours(min, max, distance); |
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writer.postProcess(); |
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} |
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} catch (RasterBufferInvalidException e) {
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RasterToolsUtil.messageBoxError("error_loading_grid", this, e); |
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} catch (GridException e) {
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RasterToolsUtil.messageBoxError("error_loading_grid", this, e); |
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} catch (StopWriterVisitorException e) {
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RasterToolsUtil.messageBoxError("error_closing_grid", this, e); |
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} catch (Exception e) { |
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RasterToolsUtil.messageBoxError("error_closing_grid", this, e); |
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} finally {
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if(externalActions != null) |
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externalActions.end(fileName); |
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} |
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} |
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private void createContours(double dMin, double dMax, double dDistance) throws Exception { |
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int x, y;
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int i;
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int ID;
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int iNX,iNY;
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double dZ;
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double dValue = 0; |
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iNX = grid.getNX(); |
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iNY = grid.getNY(); |
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m_Row = new char[iNY][iNX]; |
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m_Col = new char[iNY][iNX]; |
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if( dDistance <= 0 ) |
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dDistance= 1;
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double increment = (25 / (double)iNY); |
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for(dZ = dMin, ID = 0; dZ <= dMax; dZ += dDistance) { |
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for(y = 0; y < iNY - 1; y++) { |
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percent += increment; |
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for(x = 0; x < iNX - 1; x++) { |
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dValue = grid.getCellValue(y, x); |
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if( dValue >= dZ ) {
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m_Row[y][x] = (char) (grid.getCellValue(y, x + 1) < dZ ? 1 : 0); |
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m_Col[y][x] = (char) (grid.getCellValue(y + 1, x) < dZ ? 1 : 0); |
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} |
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else {
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m_Row[y][x] = (char) (grid.getCellValue(y, x + 1) >= dZ ? 1 : 0); |
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m_Col[y][x] = (char) (grid.getCellValue(y + 1, x) >= dZ ? 1 : 0); |
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} |
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} |
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} |
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increment = (75 / (double)iNY); |
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for(y = 0; y < iNY - 1; y++) { |
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percent += increment; |
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for(x = 0; x < iNX - 1; x++) { |
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if(m_Row[y][x] != 0) { |
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for(i = 0; i < 2; i++) |
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findContour(x, y, dZ, true, ID++);
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m_Row[y][x] = 0;
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} |
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if(m_Col[y][x] != 0) { |
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for(i=0; i<2; i++) |
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findContour(x, y, dZ, false, ID++);
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m_Col[y][x] = 0;
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} |
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} |
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} |
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} |
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} |
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private void findContour(int x, int y, double z, boolean doRow, int ID) throws Exception { |
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boolean doContinue = true; |
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boolean bIsFirstPoint = true; |
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int zx = doRow ? x + 1 : x; |
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int zy = doRow ? y : y + 1; |
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double d = 0; |
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double xPos, yPos;
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double xMin = grid.getGridExtent().getMin().getX();
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double yMax = grid.getGridExtent().getMax().getY();
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FPolyline2D line; |
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Value values[] = new Value[2]; |
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NextContourInfo info = new NextContourInfo();
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GeneralPathX genPathX = new GeneralPathX();
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info.x = x; |
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info.y = y; |
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info.iDir = 0;
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info.doRow = doRow; |
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do{
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d = grid.getCellValue(info.y, info.x); |
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d = (d - z) / (d - grid.getCellValue(zy, zx)); |
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xPos = xMin + grid.getCellSize() * (info.x + d * (zx - info.x) + 0.5);
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yPos = yMax - grid.getCellSize() * (info.y + d * (zy - info.y) + 0.5);
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if (bIsFirstPoint) {
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genPathX.moveTo(xPos, yPos); |
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bIsFirstPoint = false;
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} else
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genPathX.lineTo(xPos, yPos); |
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if( !findNextContour(info) )
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doContinue = findNextContour(info); |
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info.iDir = (info.iDir + 5) % 8; |
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if(info.doRow) {
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m_Row[info.y][info.x] = 0;
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zx = info.x + 1;
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zy = info.y; |
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} else {
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m_Col[info.y][info.x] = 0;
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zx = info.x; |
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zy = info.y + 1;
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} |
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} |
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while(doContinue);
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values[0] = ValueFactory.createValue(ID);
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values[1] = ValueFactory.createValue(z);
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line = new FPolyline2D(genPathX);
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addShape(line, values); |
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} |
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private boolean findNextContour(NextContourInfo info) { |
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boolean doContinue;
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if(info.doRow) {
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switch(info.iDir) {
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case 0: |
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if(m_Row[info.y + 1][info.x] != 0) { |
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info.y++; |
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info.iDir = 0;
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doContinue = true;
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break;
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} |
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case 1: |
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if(m_Col[info.y][info.x + 1] != 0) { |
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info.x++; |
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info.iDir = 1;
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info.doRow = false;
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doContinue = true;
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break;
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} |
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case 2: |
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case 3: |
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if(info.y-1 >= 0) { |
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if(m_Col[info.y - 1][info.x + 1] != 0) { |
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info.x++; |
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info.y--; |
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info.doRow = false;
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info.iDir = 3;
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doContinue = true;
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break;
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} |
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} |
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case 4: |
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if(info.y-1>=0) { |
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if(m_Row[info.y - 1][info.x]!= 0) { |
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info.y--; |
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info.iDir = 4;
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doContinue = true;
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break;
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} |
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} |
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case 5: |
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if(info.y-1>=0) { |
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if(m_Col[info.y - 1][info.x] != 0) { |
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info.y--; |
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info.doRow = false;
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info.iDir = 5 ;
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doContinue = true;
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break;
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} |
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} |
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case 6: |
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case 7: |
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if(m_Col[info.y][info.x]!= 0) { |
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info.doRow = false;
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info.iDir = 7;
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doContinue = true;
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break;
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} |
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default:
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info.iDir = 0;
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doContinue = false;
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} |
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} |
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else{
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switch(info.iDir) {
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case 0: |
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case 1: |
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if(m_Row[info.y + 1][info.x] != 0) { |
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info.y++; |
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info.doRow = true;
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info.iDir = 1;
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doContinue = true;
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break;
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} |
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case 2: |
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if(m_Col[info.y][info.x + 1] != 0) { |
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info.x++; |
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info.iDir = 2;
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doContinue = true;
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break;
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} |
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case 3: |
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if(m_Row[info.y][info.x] != 0) { |
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info.doRow = true;
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info.iDir = 3;
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doContinue = true;
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break;
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} |
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case 4: |
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case 5: |
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if(info.x-1>=0) { |
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if(m_Row[info.y][info.x - 1] != 0) { |
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info.x--; |
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info.doRow = true;
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info.iDir = 5;
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doContinue = true;
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break;
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} |
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} |
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case 6: |
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if(info.x-1>=0) { |
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if(m_Col[info.y][info.x - 1] != 0) { |
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info.x--; |
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info.iDir = 6;
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doContinue = true;
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break;
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} |
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} |
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case 7: |
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if(info.x-1 >= 0) { |
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if(m_Row[info.y + 1][info.x - 1] != 0) { |
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info.x--; |
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info.y++; |
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info.doRow = true;
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info.iDir = 7;
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doContinue = true;
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break;
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} |
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} |
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default:
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info.iDir = 0;
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doContinue = false;
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} |
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} |
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return(doContinue);
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.gui.beans.incrementabletask.IIncrementable#getPercent()
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*/
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public int getPercent() { |
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return (int)percent; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.gui.beans.incrementabletask.IIncrementable#getTitle()
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*/
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public String getTitle() { |
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return RasterToolsUtil.getText(this, "vectorization"); |
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} |
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public void addShape(FShape shape, Value[] value) throws Exception { |
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if (shape == null) |
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return;
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IGeometry geom = ShapeFactory.createGeometry(shape); |
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addGeometry(geom, value); |
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} |
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public void addGeometry(IGeometry geom, Value[] value) throws Exception { |
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DefaultFeature feat = new DefaultFeature(geom, value, Integer.toString(m_iGeometry)); |
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IRowEdited editFeat = new DefaultRowEdited(feat, IRowEdited.STATUS_MODIFIED, m_iGeometry);
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m_iGeometry++; |
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writer.process(editFeat); |
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} |
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|
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/**
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* Returns the length of field
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* @param dataType
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* @return length of field
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*/
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public int getDataTypeLength(int dataType) { |
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switch (dataType) {
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case Types.NUMERIC: |
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case Types.DOUBLE: |
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case Types.REAL: |
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case Types.FLOAT: |
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case Types.BIGINT: |
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case Types.INTEGER: |
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case Types.DECIMAL: |
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return 20; |
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case Types.CHAR: |
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case Types.VARCHAR: |
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case Types.LONGVARCHAR: |
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return 254; |
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case Types.DATE: |
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return 8; |
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case Types.BOOLEAN: |
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case Types.BIT: |
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return 1; |
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} |
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return 0; |
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} |
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} |