root / org.gvsig.toolbox / trunk / org.gvsig.toolbox / org.gvsig.toolbox.algorithm / src / main / java / es / unex / sextante / hydrology / maxValueUphill / MaxValueUphillAlgorithm.java @ 59
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1 | 59 | nbrodin | package es.unex.sextante.hydrology.maxValueUphill; |
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2 | |||
3 | |||
4 | import es.unex.sextante.core.GeoAlgorithm; |
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5 | import es.unex.sextante.core.AnalysisExtent; |
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6 | import es.unex.sextante.core.Sextante; |
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7 | import es.unex.sextante.dataObjects.IRasterLayer; |
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8 | import es.unex.sextante.exceptions.GeoAlgorithmExecutionException; |
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9 | import es.unex.sextante.exceptions.RepeatedParameterNameException; |
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10 | |||
11 | public class MaxValueUphillAlgorithm |
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12 | extends
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13 | GeoAlgorithm { |
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14 | |||
15 | private final static int m_iOffsetX[] = { 0, 1, 1, 1, 0, -1, -1, -1 }; |
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16 | private final static int m_iOffsetY[] = { 1, 1, 0, -1, -1, -1, 0, 1 }; |
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17 | private static final double NOT_VISITED = -1.0; |
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18 | |||
19 | public static final String DEM = "DEM"; |
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20 | public static final String PARAM = "PARAM"; |
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21 | public static final String RESULT = "RESULT"; |
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22 | |||
23 | private int m_iNX, m_iNY; |
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24 | private IRasterLayer m_DEM = null; |
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25 | private IRasterLayer m_Param = null; |
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26 | private IRasterLayer m_MaxValue;
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27 | |||
28 | |||
29 | @Override
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30 | public boolean processAlgorithm() throws GeoAlgorithmExecutionException { |
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31 | |||
32 | m_DEM = m_Parameters.getParameterValueAsRasterLayer(DEM); |
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33 | m_Param = m_Parameters.getParameterValueAsRasterLayer(PARAM); |
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34 | |||
35 | m_MaxValue = getNewRasterLayer(RESULT, Sextante.getText("Max_value_uphill"), IRasterLayer.RASTER_DATA_TYPE_FLOAT);
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36 | |||
37 | |||
38 | m_MaxValue.assign(NOT_VISITED); |
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39 | |||
40 | final AnalysisExtent extent = m_MaxValue.getWindowGridExtent();
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41 | |||
42 | m_DEM.setWindowExtent(extent); |
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43 | m_Param.setWindowExtent(extent); |
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44 | |||
45 | m_MaxValue.setNoDataValue(m_Param.getNoDataValue()); |
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46 | |||
47 | m_iNX = m_DEM.getNX(); |
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48 | m_iNY = m_DEM.getNY(); |
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49 | |||
50 | calculateMaxValues(); |
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51 | |||
52 | return !m_Task.isCanceled();
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53 | |||
54 | } |
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55 | |||
56 | |||
57 | @Override
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58 | public void defineCharacteristics() { |
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59 | |||
60 | setName(Sextante.getText("Max_value_uphill"));
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61 | setGroup(Sextante.getText("Indices_and_other_hydrological_parameters"));
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62 | setUserCanDefineAnalysisExtent(true);
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63 | |||
64 | try {
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65 | m_Parameters.addInputRasterLayer(DEM, Sextante.getText("Elevation"), true); |
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66 | m_Parameters.addInputRasterLayer(PARAM, Sextante.getText("Parameter"), true); |
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67 | addOutputRasterLayer(RESULT, Sextante.getText("Max_value_uphill"));
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68 | } |
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69 | catch (final RepeatedParameterNameException e) { |
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70 | Sextante.addErrorToLog(e); |
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71 | } |
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72 | |||
73 | } |
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74 | |||
75 | |||
76 | private void calculateMaxValues() { |
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77 | |||
78 | int x, y;
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79 | |||
80 | for (y = 0; (y < m_iNY) && setProgress(y, m_iNY); y++) { |
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81 | for (x = 0; x < m_iNX; x++) { |
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82 | getMaxValue(x, y); |
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83 | } |
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84 | |||
85 | } |
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86 | |||
87 | } |
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88 | |||
89 | |||
90 | private void getMaxValue(final int x, |
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91 | final int y) { |
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92 | |||
93 | int i, ix, iy;
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94 | int iDirection;
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95 | double dValue;
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96 | double dParamValue;
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97 | double dMaxValue;
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98 | |||
99 | |||
100 | if (m_Task.isCanceled()) {
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101 | return;
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102 | } |
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103 | |||
104 | |||
105 | if (m_MaxValue.getCellValueAsDouble(x, y) != NOT_VISITED) {
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106 | return;
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107 | } |
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108 | |||
109 | dValue = m_DEM.getCellValueAsDouble(x, y); |
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110 | if (!m_DEM.isNoDataValue(dValue)) {
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111 | dParamValue = m_Param.getCellValueAsDouble(x, y); |
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112 | if (!m_Param.isNoDataValue(dParamValue)) {
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113 | m_MaxValue.setCellValue(x, y, dParamValue); |
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114 | } |
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115 | for (i = 0; i < 8; i++) { |
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116 | ix = x + m_iOffsetX[i]; |
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117 | iy = y + m_iOffsetY[i]; |
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118 | dValue = m_DEM.getCellValueAsDouble(ix, iy); |
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119 | if (!m_DEM.isNoDataValue(dValue)) {
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120 | iDirection = m_DEM.getDirToNextDownslopeCell(ix, iy); |
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121 | if (iDirection >= 0) { |
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122 | if ((i + 4) % 8 == iDirection) { |
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123 | getMaxValue(ix, iy); |
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124 | dMaxValue = m_MaxValue.getCellValueAsDouble(x, y); |
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125 | if (m_MaxValue.isNoDataValue(dMaxValue)) {
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126 | m_MaxValue.setCellValue(x, y, m_MaxValue.getCellValueAsDouble(ix, iy)); |
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127 | } |
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128 | else {
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129 | m_MaxValue.setCellValue(x, y, Math.max(m_MaxValue.getCellValueAsDouble(x, y),
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130 | m_MaxValue.getCellValueAsDouble(ix, iy))); |
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131 | } |
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132 | } |
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133 | } |
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134 | } |
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135 | } |
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136 | } |
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137 | else {
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138 | m_MaxValue.setNoData(x, y); |
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139 | } |
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140 | |||
141 | |||
142 | } |
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143 | |||
144 | } |