[31] | 1 | /************************************************************************************ |
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| 2 | * Copyright (C) 2008 by Politehnica University of Bucharest and Rutgers University |
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| 3 | * All rights reserved. |
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| 4 | * Refer to LICENSE for terms and conditions of use. |
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| 5 | ***********************************************************************************/ |
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| 6 | package vnsim.map.object; |
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| 7 | |
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| 8 | /** |
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| 9 | * @author Victor-Radu |
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| 10 | */ |
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| 11 | |
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| 12 | import java.util.ArrayList; |
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| 13 | |
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| 14 | import vnsim.applications.trafficview.SimulatedCarInfo; |
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| 15 | import vnsim.core.Engine; |
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| 16 | import vnsim.map.utils.GPSutil; |
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| 17 | |
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| 18 | |
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| 19 | |
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| 20 | |
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| 21 | |
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| 22 | public class PeanoKey implements Comparable<PeanoKey>, java.io.Serializable { |
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| 23 | |
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| 24 | /** <code>serialVersionUID</code> */ |
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| 25 | private static final long serialVersionUID = -5883719321862303634L; |
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| 26 | |
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| 27 | protected byte[] value = new byte[19]; |
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| 28 | protected int roadIndex; |
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| 29 | protected int pointIndex; |
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| 30 | |
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| 31 | //added to optimize the search of nearby cars |
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| 32 | protected transient ArrayList<SimulatedCarInfo> cars = null; |
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| 33 | /** |
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| 34 | * @param value |
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| 35 | * @param roadIndex |
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| 36 | * @param pointIndex |
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| 37 | */ |
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| 38 | public PeanoKey(Point p){ |
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| 39 | int i; |
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| 40 | byte[] latitude = parseCoord(p.latitude, 9); |
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| 41 | byte[] longitude = parseCoord(p.longitude, 10); |
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| 42 | for (i = 0; i < 9; i++) { |
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| 43 | this.value[2 * i] = longitude[i]; |
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| 44 | this.value[2 * i + 1] = latitude[i]; |
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| 45 | } |
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| 46 | this.value[2 * i] = longitude[i]; |
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| 47 | |
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| 48 | } |
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| 49 | |
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| 50 | public PeanoKey(Point p, int roadIndex, int pointIndex) { |
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| 51 | //computes a peano key from a point, the value array is obtained |
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| 52 | //interleaving the point's latitude and longitude digits |
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| 53 | //19, 10 (longitude), 9 (latitude) |
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| 54 | byte[] latitude = parseCoord(p.latitude, 9); |
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| 55 | byte[] longitude = parseCoord(p.longitude, 10); |
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| 56 | //System.out.println(new String(longitude)); |
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| 57 | int i; |
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| 58 | this.roadIndex = roadIndex; |
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| 59 | this.pointIndex = pointIndex; |
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| 60 | for (i = 0; i < 9; i++) { |
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| 61 | this.value[2 * i] = longitude[i]; |
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| 62 | this.value[2 * i + 1] = latitude[i]; |
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| 63 | } |
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| 64 | this.value[2 * i] = longitude[i]; |
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| 65 | |
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| 66 | } |
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| 67 | |
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| 68 | public int compareTo(PeanoKey pk) { |
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| 69 | int i = 0; |
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| 70 | while (i < value.length && this.value[i] == pk.value[i]) |
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| 71 | i++; |
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| 72 | if (i < value.length) |
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| 73 | return this.value[i] - pk.value[i]; |
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| 74 | else |
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| 75 | return 0; |
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| 76 | } |
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| 77 | |
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| 78 | // Used for searching the sorted peano keys vector, for cars in a certain range |
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| 79 | // See the way the vector is sorted by interleaving digits |
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| 80 | public void setToUpperCorner(PeanoKey reference) |
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| 81 | { |
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| 82 | boolean trig = false; |
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| 83 | for (int i = 0; i < value.length; i++){ |
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| 84 | if (trig){ |
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| 85 | value[i] = 9; |
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| 86 | }else |
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| 87 | if (value[i] != reference.value[i]){ |
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| 88 | trig = true; |
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| 89 | } |
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| 90 | } |
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| 91 | } |
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| 92 | public void setToLowerCorner(PeanoKey reference) |
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| 93 | { |
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| 94 | boolean trig = false; |
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| 95 | for (int i = 0; i < value.length; i++) |
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| 96 | { |
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| 97 | |
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| 98 | if (trig) |
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| 99 | { |
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| 100 | value[i] = -9; |
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| 101 | } |
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| 102 | else |
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| 103 | if (value[i] != reference.value[i]) |
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| 104 | { |
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| 105 | trig = true; |
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| 106 | } |
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| 107 | } |
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| 108 | } |
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| 109 | |
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| 110 | public String toString() |
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| 111 | { |
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| 112 | StringBuffer sb = new StringBuffer(); |
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| 113 | sb.append("["); |
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| 114 | sb.append((char)this.value[0]); |
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| 115 | sb.append((char)this.value[1]); |
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| 116 | for (int i = 2; i < value.length; i++) |
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| 117 | sb.append((char)(Math.abs(this.value[i])+'0')); |
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| 118 | // sb.append(" - "); |
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| 119 | // sb.append(this.roadIndex); |
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| 120 | // sb.append(", "); |
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| 121 | // sb.append(this.pointIndex); |
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| 122 | sb.append("]"); |
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| 123 | |
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| 124 | return sb.toString(); |
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| 125 | } |
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| 126 | |
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| 127 | private byte[] parseCoord(double coord, int digitno) |
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| 128 | { |
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| 129 | //digitno can be 10 for longitude or 9 for latitude |
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| 130 | byte[] result = new byte[digitno]; |
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| 131 | int coef = 0; |
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| 132 | if (coord>0){ |
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| 133 | result[0] = '+'; |
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| 134 | coef = 1; |
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| 135 | }else{ |
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| 136 | result[0] = '-'; |
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| 137 | coord = - coord; |
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| 138 | coef = -1; |
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| 139 | } |
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| 140 | int c = (int)(coord * 1e6); |
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| 141 | for (int i=digitno-1; i>0; i--){ |
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| 142 | result[i] = (byte)((c%10)*coef); |
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| 143 | c /= 10; |
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| 144 | } |
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| 145 | |
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| 146 | return result; |
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| 147 | } |
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| 148 | |
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| 149 | |
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| 150 | public int getPointIndex() |
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| 151 | { |
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| 152 | return pointIndex; |
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| 153 | } |
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| 154 | public void setPointIndex(int pointIndex) |
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| 155 | { |
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| 156 | this.pointIndex = pointIndex; |
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| 157 | } |
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| 158 | public int getRoadIndex() { |
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| 159 | return roadIndex; |
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| 160 | } |
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| 161 | public void setRoadIndex(int roadIndex) { |
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| 162 | this.roadIndex = roadIndex; |
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| 163 | } |
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| 164 | public byte[] getValue() { |
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| 165 | return value; |
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| 166 | } |
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| 167 | public void setValue(byte[] value) { |
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| 168 | this.value = value; |
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| 169 | } |
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| 170 | |
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| 171 | |
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| 172 | PeanoKey maxpk = null; |
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| 173 | PeanoKey minpk = null; |
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| 174 | |
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| 175 | public void addCar(SimulatedCarInfo car) |
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| 176 | { |
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| 177 | if (cars == null) |
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| 178 | { |
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| 179 | cars = new ArrayList<SimulatedCarInfo>(); |
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| 180 | } |
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| 181 | if (maxpk == null || minpk == null) |
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| 182 | { |
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| 183 | Road r = Globals.map.roads.get(roadIndex); |
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| 184 | Point p = r.points.get(pointIndex); |
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| 185 | maxpk = GPSutil.getMaxSearchBoundPK(p, 2 * Engine.WIRELESS_RANGE); |
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| 186 | minpk = GPSutil.getMaxSearchBoundPK(p,- 2 * Engine.WIRELESS_RANGE); |
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| 187 | } |
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| 188 | cars.add(car); |
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| 189 | } |
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| 190 | |
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| 191 | public void removeCar(SimulatedCarInfo car) |
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| 192 | { |
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| 193 | if (cars == null) |
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| 194 | return; |
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| 195 | cars.remove(car); |
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| 196 | if (cars.size() == 0) |
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| 197 | cars = null; |
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| 198 | } |
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| 199 | |
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| 200 | public ArrayList<SimulatedCarInfo> getCars() { |
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| 201 | return cars; |
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| 202 | } |
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| 203 | |
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| 204 | public PeanoKey getMaxpk() { |
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| 205 | return maxpk; |
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| 206 | } |
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| 207 | |
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| 208 | public PeanoKey getMinpk() { |
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| 209 | return minpk; |
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| 210 | } |
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| 211 | |
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| 212 | public void setMaxpk(PeanoKey maxpk) { |
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| 213 | this.maxpk = maxpk; |
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| 214 | } |
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| 215 | |
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| 216 | public void setMinpk(PeanoKey minpk) { |
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| 217 | this.minpk = minpk; |
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| 218 | } |
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| 219 | |
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| 220 | |
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| 221 | |
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| 222 | } |
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| 223 | |
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