svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.geometry / org.gvsig.expressionevaluator.geometry.lib / org.gvsig.expressionevaluator.geometry.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / function / spatial / PointByAngleFunction.java @ 47729
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1 | 45612 | omartinez | package org.gvsig.expressionevaluator.impl.function.spatial; |
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2 | |||
3 | import org.apache.commons.lang3.Range; |
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4 | import org.apache.commons.lang3.StringUtils; |
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5 | import org.apache.commons.math.util.MathUtils; |
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6 | import org.gvsig.expressionevaluator.Interpreter; |
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7 | import org.gvsig.expressionevaluator.spi.AbstractGeometryFunction; |
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8 | import org.gvsig.fmap.geom.Geometry; |
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9 | import org.gvsig.fmap.geom.GeometryLocator; |
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10 | import org.gvsig.fmap.geom.primitive.Point; |
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11 | |||
12 | public class PointByAngleFunction extends AbstractGeometryFunction { |
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13 | |||
14 | public PointByAngleFunction() {
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15 | 46468 | jjdelcerro | super("Spatial", "PointByAngle", Range.between(3, 5)); |
16 | 45612 | omartinez | } |
17 | |||
18 | @Override
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19 | public boolean allowConstantFolding() { |
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20 | return true; |
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21 | } |
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22 | |||
23 | @Override
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24 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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25 | Object arg1 = getObject(args, 0); |
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26 | try {
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27 | arg1 = getDouble(args, 0);
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28 | } catch (Exception ex) { |
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29 | arg1 = getObject(args, 0);
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30 | } |
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31 | // default value in sexagesimal grades 360?
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32 | // operations in radians
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33 | String unit = "s"; |
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34 | Point pointGeom;
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35 | double distance;
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36 | double angle;
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37 | if (!(arg1 instanceof Number)) { |
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38 | //3 or 4 args
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39 | //(geom, distance, angle, unit='s')
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40 | |||
41 | Geometry argGeom = GeometryLocator.getGeometryManager().createFrom(arg1); |
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42 | if(argGeom == null) { |
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43 | throw new RuntimeException("Geometry can't be null"); |
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44 | } |
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45 | pointGeom = argGeom.centroid(); |
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46 | if (args.length == 4) { |
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47 | unit = this.getStr(args, 3); |
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48 | } |
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49 | |||
50 | distance = getDouble(args, 1);
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51 | angle = getDouble(args, 2);
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52 | } else {
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53 | //4 or 5 args
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54 | //(x, y, distance, angle, unit='s')
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55 | |||
56 | double x1 = (double) arg1; |
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57 | double x2 = getDouble(args, 1); |
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58 | pointGeom = GeometryLocator.getGeometryManager().createPoint(x1, x2, Geometry.SUBTYPES.GEOM2D); |
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59 | if(pointGeom == null) { |
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60 | throw new RuntimeException("Geometry can't be null"); |
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61 | } |
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62 | if (args.length == 5) { |
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63 | unit = this.getStr(args, 4); |
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64 | } |
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65 | |||
66 | distance = getDouble(args, 2);
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67 | angle = getDouble(args, 3);
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68 | } |
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69 | |||
70 | if (StringUtils.equals(unit, "s")){ |
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71 | angle = MathUtils.round(Math.toRadians(angle), 8); |
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72 | } else if (StringUtils.equals(unit, "g")) { |
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73 | angle = Math.PI * angle / 200; |
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74 | } |
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75 | |||
76 | double deltaX = distance * MathUtils.round(Math.cos(angle), 8); |
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77 | double deltaY = distance * MathUtils.round(Math.sin(angle), 8); |
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78 | |||
79 | pointGeom.move(deltaX, deltaY); |
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80 | return pointGeom;
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81 | |||
82 | } |
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83 | |||
84 | } |