root / org.gvsig.toolbox / trunk / org.gvsig.toolbox / org.gvsig.toolbox.algorithm / src / main / java / es / unex / sextante / lighting / visualExposure / VisualExposureAlgorithm.java @ 59
History | View | Annotate | Download (7.2 KB)
1 | 59 | nbrodin | package es.unex.sextante.lighting.visualExposure; |
---|---|---|---|
2 | |||
3 | import es.unex.sextante.additionalInfo.AdditionalInfoNumericalValue; |
||
4 | import es.unex.sextante.core.GeoAlgorithm; |
||
5 | import es.unex.sextante.core.Sextante; |
||
6 | import es.unex.sextante.dataObjects.IRasterLayer; |
||
7 | import es.unex.sextante.exceptions.RepeatedParameterNameException; |
||
8 | |||
9 | public class VisualExposureAlgorithm |
||
10 | extends
|
||
11 | GeoAlgorithm { |
||
12 | |||
13 | public static final String DEM = "DEM"; |
||
14 | public static final String FEATURES = "FEATURES"; |
||
15 | public static final String WEIGHTS = "WEIGHTS"; |
||
16 | public static final String METHOD = "METHOD"; |
||
17 | public static final String RADIUS = "RADIUS"; |
||
18 | public static final String RESULT = "RESULT"; |
||
19 | |||
20 | private int m_iNX, m_iNY; |
||
21 | private int m_iMethod; |
||
22 | private int m_iRadius; |
||
23 | private int m_iRadius2; |
||
24 | |||
25 | private IRasterLayer m_Exposure;
|
||
26 | private IRasterLayer m_DEM = null; |
||
27 | private IRasterLayer m_Features = null; |
||
28 | private IRasterLayer m_Weights = null; |
||
29 | |||
30 | |||
31 | @Override
|
||
32 | public boolean processAlgorithm() { |
||
33 | |||
34 | int x, y;
|
||
35 | double dValue;
|
||
36 | |||
37 | try {
|
||
38 | m_iMethod = m_Parameters.getParameterValueAsInt(METHOD); |
||
39 | m_DEM = m_Parameters.getParameterValueAsRasterLayer(DEM); |
||
40 | m_Weights = m_Parameters.getParameterValueAsRasterLayer(WEIGHTS); |
||
41 | m_Features = m_Parameters.getParameterValueAsRasterLayer(FEATURES); |
||
42 | m_Exposure = getNewRasterLayer(RESULT, Sextante.getText("Exposure"), IRasterLayer.RASTER_DATA_TYPE_INT);
|
||
43 | |||
44 | //GridExtent extent = m_Exposure.getGridExtent();
|
||
45 | |||
46 | m_DEM.setWindowExtent(getAnalysisExtent()); |
||
47 | m_Weights.setWindowExtent(getAnalysisExtent()); |
||
48 | m_Features.setWindowExtent(getAnalysisExtent()); |
||
49 | m_Features.setInterpolationMethod(IRasterLayer.INTERPOLATION_NearestNeighbour); |
||
50 | |||
51 | m_iRadius = (int) Math.ceil(m_Parameters.getParameterValueAsDouble("RADIUS") / m_DEM.getWindowCellSize()); |
||
52 | m_iRadius2 = (int) Math.ceil(Math.pow(m_Parameters.getParameterValueAsDouble("RADIUS"), 2.0) |
||
53 | / Math.pow(m_DEM.getWindowCellSize(), 2.0)); |
||
54 | |||
55 | m_Exposure.assign(0.0);
|
||
56 | |||
57 | m_iNX = m_DEM.getNX(); |
||
58 | m_iNY = m_DEM.getNY(); |
||
59 | |||
60 | for (y = 0; (y < m_iNY) && setProgress(y, m_iNY); y++) { |
||
61 | for (x = 0; x < m_iNX; x++) { |
||
62 | dValue = m_Features.getCellValueAsDouble(x, y); |
||
63 | if (!m_Features.isNoDataValue(dValue) && (dValue != 0)) { |
||
64 | if (m_iMethod == 0) { |
||
65 | Irradiate(x, y); |
||
66 | } |
||
67 | else {
|
||
68 | Collect(x, y); |
||
69 | } |
||
70 | } |
||
71 | } |
||
72 | |||
73 | } |
||
74 | |||
75 | m_Exposure.setNoDataValue(0.0);
|
||
76 | |||
77 | } |
||
78 | catch (final Exception e) { |
||
79 | Sextante.addErrorToLog(e); |
||
80 | return false; |
||
81 | } |
||
82 | |||
83 | return !m_Task.isCanceled();
|
||
84 | } |
||
85 | |||
86 | |||
87 | @Override
|
||
88 | public void defineCharacteristics() { |
||
89 | |||
90 | final String[] sMethod = { Sextante.getText("Irradiate"), Sextante.getText("Colect_values") }; |
||
91 | |||
92 | setUserCanDefineAnalysisExtent(true);
|
||
93 | setGroup(Sextante.getText("Visibility_and_lighting"));
|
||
94 | setName(Sextante.getText("Visual_exposure"));
|
||
95 | |||
96 | try {
|
||
97 | m_Parameters.addInputRasterLayer(DEM, Sextante.getText("Elevation"), true); |
||
98 | m_Parameters.addInputRasterLayer(FEATURES, Sextante.getText("Elements"), true); |
||
99 | m_Parameters.addInputRasterLayer(WEIGHTS, Sextante.getText("Weight"), true); |
||
100 | m_Parameters.addSelection(METHOD, Sextante.getText("Method"), sMethod);
|
||
101 | m_Parameters.addNumericalValue(RADIUS, Sextante.getText("Radius"), 1000, |
||
102 | AdditionalInfoNumericalValue.NUMERICAL_VALUE_DOUBLE); |
||
103 | addOutputRasterLayer(RESULT, Sextante.getText("Visual_exposure"));
|
||
104 | } |
||
105 | catch (final RepeatedParameterNameException e) { |
||
106 | Sextante.addErrorToLog(e); |
||
107 | } |
||
108 | |||
109 | } |
||
110 | |||
111 | |||
112 | private void Irradiate(final int x, |
||
113 | final int y) { |
||
114 | |||
115 | final int i, j; |
||
116 | int x2, y2;
|
||
117 | int dx, dy;
|
||
118 | int iXMin, iXMax, iYMin, iYMax;
|
||
119 | double dz, z, z2;
|
||
120 | final double dWeight = m_Weights.getCellValueAsDouble(x, y); |
||
121 | |||
122 | z = m_DEM.getCellValueAsDouble(x, y) + m_Features.getCellValueAsDouble(x, y); |
||
123 | |||
124 | iXMin = Math.max(0, x - m_iRadius); |
||
125 | iXMax = Math.min(m_iNX, x + m_iRadius) + 1; |
||
126 | iYMin = Math.max(0, y - m_iRadius); |
||
127 | iYMax = Math.max(m_iNY, y + m_iRadius) + 1; |
||
128 | |||
129 | for (y2 = iYMin; y2 < iYMax; y2++) {
|
||
130 | for (x2 = iXMin; x2 < iXMax; x2++) {
|
||
131 | dx = x - x2; |
||
132 | dy = y - y2; |
||
133 | if ((dx * dx + dy * dy) < m_iRadius2) {
|
||
134 | z2 = m_DEM.getCellValueAsDouble(x2, y2); |
||
135 | if (!m_DEM.isNoDataValue(z2)) {
|
||
136 | dz = z - z2; |
||
137 | if (tracePoint(x2, y2, dx, dy, dz)) {
|
||
138 | m_Exposure.addToCellValue(x2, y2, dWeight); |
||
139 | } |
||
140 | } |
||
141 | } |
||
142 | } |
||
143 | } |
||
144 | |||
145 | } |
||
146 | |||
147 | |||
148 | private void Collect(final int x, |
||
149 | final int y) { |
||
150 | |||
151 | final int i, j; |
||
152 | int x2, y2;
|
||
153 | int dx, dy;
|
||
154 | int iXMin, iXMax, iYMin, iYMax;
|
||
155 | double dz, z, z2;
|
||
156 | |||
157 | z = m_DEM.getCellValueAsDouble(x, y) + m_Features.getCellValueAsDouble(x, y); |
||
158 | |||
159 | iXMin = Math.max(0, x - m_iRadius); |
||
160 | iXMax = Math.min(m_iNX, x + m_iRadius) + 1; |
||
161 | iYMin = Math.max(0, y - m_iRadius); |
||
162 | iYMax = Math.max(m_iNY, y + m_iRadius) + 1; |
||
163 | |||
164 | for (y2 = iYMin; y2 < iYMax; y2++) {
|
||
165 | for (x2 = iXMin; x2 < iXMax; x2++) {
|
||
166 | dx = x - x2; |
||
167 | dy = y - y2; |
||
168 | if ((dx * dx + dy * dy) < m_iRadius2) {
|
||
169 | z2 = m_DEM.getCellValueAsDouble(x2, y2); |
||
170 | if (!m_DEM.isNoDataValue(z2)) {
|
||
171 | dz = z - z2; |
||
172 | if (tracePoint(x2, y2, dx, dy, dz)) {
|
||
173 | m_Exposure.addToCellValue(x, y, m_Weights.getCellValueAsDouble(x2, y2)); |
||
174 | } |
||
175 | } |
||
176 | } |
||
177 | } |
||
178 | } |
||
179 | |||
180 | } |
||
181 | |||
182 | |||
183 | boolean tracePoint(int x, |
||
184 | int y,
|
||
185 | double dx,
|
||
186 | double dy,
|
||
187 | double dz) {
|
||
188 | |||
189 | double ix, iy, iz, id, d, dist, zmax;
|
||
190 | |||
191 | d = Math.abs(dx) > Math.abs(dy) ? Math.abs(dx) : Math.abs(dy); |
||
192 | |||
193 | zmax = m_DEM.getMaxValue(); |
||
194 | |||
195 | if (d > 0) { |
||
196 | dist = Math.sqrt(dx * dx + dy * dy);
|
||
197 | |||
198 | dx /= d; |
||
199 | dy /= d; |
||
200 | dz /= d; |
||
201 | |||
202 | d = dist / d; |
||
203 | |||
204 | id = 0.0;
|
||
205 | ix = x + 0.5;
|
||
206 | iy = y + 0.5;
|
||
207 | iz = m_DEM.getCellValueAsDouble(x, y); |
||
208 | |||
209 | while (id < dist) {
|
||
210 | id += d; |
||
211 | |||
212 | ix += dx; |
||
213 | iy += dy; |
||
214 | iz += dz; |
||
215 | |||
216 | x = (int) ix;
|
||
217 | y = (int) iy;
|
||
218 | |||
219 | if (!m_DEM.getWindowGridExtent().containsCell(x, y)) {
|
||
220 | return true; |
||
221 | } |
||
222 | else if (iz < m_DEM.getCellValueAsDouble(x, y)) { |
||
223 | return false; |
||
224 | } |
||
225 | else if (iz > zmax) { |
||
226 | return true; |
||
227 | } |
||
228 | } |
||
229 | } |
||
230 | |||
231 | return (true); |
||
232 | } |
||
233 | |||
234 | } |