root / org.gvsig.toolbox / trunk / org.gvsig.toolbox / org.gvsig.toolbox.algorithm / src / main / java / es / unex / sextante / gridTools / closeGapsNN / CloseGapsNNAlgorithm.java @ 59
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package es.unex.sextante.gridTools.closeGapsNN; |
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import java.util.ArrayList; |
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import es.unex.sextante.core.GeoAlgorithm; |
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import es.unex.sextante.core.Sextante; |
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import es.unex.sextante.dataObjects.IRasterLayer; |
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import es.unex.sextante.exceptions.GeoAlgorithmExecutionException; |
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import es.unex.sextante.exceptions.RepeatedParameterNameException; |
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import es.unex.sextante.rasterWrappers.GridCell; |
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public class CloseGapsNNAlgorithm |
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extends
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GeoAlgorithm { |
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private static final int NO_DATA = -1; |
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public static final String LAYER = "LAYER"; |
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public static final String RESULT = "RESULT"; |
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int m_iNX, m_iNY;
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IRasterLayer m_Window; |
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IRasterLayer m_Result; |
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IRasterLayer m_Filled; |
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ArrayList m_CentralPoints, m_AdjPoints;
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@Override
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public void defineCharacteristics() { |
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setName(Sextante.getText("Void_filling_[nearest_neighbour]"));
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setGroup(Sextante.getText("Basic_tools_for_raster_layers"));
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setUserCanDefineAnalysisExtent(false);
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setIsDeterminatedProcess(false);
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try {
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m_Parameters.addInputRasterLayer(LAYER, Sextante.getText("Layer"), true); |
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addOutputRasterLayer(RESULT, Sextante.getText("Filled_layer"));
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} |
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catch (final RepeatedParameterNameException e) { |
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Sextante.addErrorToLog(e); |
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} |
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} |
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@Override
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public boolean processAlgorithm() throws GeoAlgorithmExecutionException { |
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int x, y;
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double dValue;
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m_CentralPoints = new ArrayList(); |
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m_AdjPoints = new ArrayList(); |
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m_Window = m_Parameters.getParameterValueAsRasterLayer(LAYER); |
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m_Window.setFullExtent(); |
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m_Result = getNewRasterLayer(RESULT, m_Window.getName() + Sextante.getText("[filled]"), m_Window.getDataType(),
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m_Window.getWindowGridExtent()); |
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m_Filled = getTempRasterLayer(IRasterLayer.RASTER_DATA_TYPE_INT, m_Window.getWindowGridExtent()); |
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m_iNX = m_Window.getNX(); |
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m_iNY = m_Window.getNY(); |
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m_Filled.setNoDataValue(NO_DATA); |
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m_Filled.assignNoData(); |
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m_Result.setNoDataValue(NO_DATA); |
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m_Result.assignNoData(); |
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for (y = 0; y < m_iNY; y++) { |
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for (x = 0; x < m_iNX; x++) { |
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dValue = m_Window.getCellValueAsDouble(x, y); |
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if (!m_Window.isNoDataValue(dValue)) {
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m_CentralPoints.add(new GridCell(x, y, dValue));
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m_Filled.setCellValue(x, y, 0.0);
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m_Result.setCellValue(x, y, dValue); |
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} |
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} |
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} |
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closeGaps(); |
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return !m_Task.isCanceled();
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} |
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private void closeGaps() { |
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int i, j;
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int iPt;
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int x, y, x2, y2;
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double dValue;
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double dAccCost;
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double dPrevAccCost;
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GridCell cell; |
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final double dDist[][] = new double[3][3]; |
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for (i = -1; i < 2; i++) { |
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for (j = -1; j < 2; j++) { |
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dDist[i + 1][j + 1] = Math.sqrt(i * i + j * j); |
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} |
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} |
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while ((m_CentralPoints.size() != 0) && !m_Task.isCanceled()) { |
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for (iPt = 0; iPt < m_CentralPoints.size(); iPt++) { |
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cell = (GridCell) m_CentralPoints.get(iPt); |
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x = cell.getX(); |
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y = cell.getY(); |
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dValue = cell.getValue(); |
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for (i = -1; i < 2; i++) { |
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for (j = -1; j < 2; j++) { |
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x2 = x + i; |
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y2 = y + j; |
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if (m_Window.isInWindow(x2, y2)) {
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dAccCost = m_Filled.getCellValueAsDouble(x, y); |
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dAccCost += dDist[i + 1][j + 1]; |
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dPrevAccCost = m_Filled.getCellValueAsDouble(x2, y2); |
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if (m_Filled.isNoDataValue(dPrevAccCost) || (dPrevAccCost > dAccCost)) {
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m_Filled.setCellValue(x2, y2, dAccCost); |
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m_Result.setCellValue(x2, y2, dValue); |
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m_AdjPoints.add(new GridCell(x2, y2, dValue));
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} |
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} |
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} |
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} |
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} |
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m_CentralPoints = m_AdjPoints; |
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m_AdjPoints = new ArrayList(); |
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if (m_Task.isCanceled()) {
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return;
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} |
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} |
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} |
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} |