[31] | 1 | package vnsim.applications.emissions; |
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| 2 | |
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| 3 | import java.io.ByteArrayOutputStream; |
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| 4 | import java.io.IOException; |
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| 5 | import java.io.Serializable; |
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| 6 | import java.nio.ByteBuffer; |
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| 7 | |
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| 8 | import vnsim.applications.trafficview.SimulatedCarInfo; |
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| 9 | import vnsim.core.CarInfo; |
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| 10 | import vnsim.core.Communicator; |
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| 11 | import vnsim.map.object.Globals; |
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| 12 | import vnsim.map.object.PeanoKey; |
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| 13 | import vnsim.map.object.Point; |
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| 14 | import vnsim.map.object.Road; |
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| 15 | import vnsim.network.RadioDev; |
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| 16 | |
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| 17 | /* |
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| 18 | * Class that simulates the car: |
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| 19 | * the car is equipped with a radio device and is capable |
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| 20 | * of transmitting and receiving messages sent on the network |
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| 21 | * |
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| 22 | * @author: Adriana Szekeres |
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| 23 | */ |
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| 24 | |
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| 25 | public class EmissionsCar extends SimulatedCarInfo{ |
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| 26 | |
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| 27 | /* Constructors */ |
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| 28 | public EmissionsCar() { |
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| 29 | super(); |
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| 30 | } |
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| 31 | |
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| 32 | public EmissionsCar(int vehicleId) { |
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| 33 | super(vehicleId); |
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| 34 | } |
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| 35 | |
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| 36 | public EmissionsCar(int vehicleId, byte lane, double speed, short roadIdx, short pointIdx, byte direction, |
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| 37 | double offset) { |
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| 38 | super(vehicleId, lane, speed, roadIdx, pointIdx, direction, offset); |
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| 39 | } |
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| 40 | |
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| 41 | public EmissionsCar(SimulatedCarInfo sci) { |
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| 42 | super(sci); |
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| 43 | } |
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| 44 | |
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| 45 | /* Function called when this car received a packet - the packet was previously |
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| 46 | * encapsulated into a scheduled event that is now "played" in the Engine class, |
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| 47 | * in method playEvent() |
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| 48 | */ |
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| 49 | @Override |
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| 50 | public void onReceive(byte[] bytesReceived, Serializable message, Communicator sender){ |
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| 51 | if (!isEquipped || bytesReceived == null) |
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| 52 | return; |
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| 53 | |
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| 54 | /* PROT_SETOFCARS: Diffusion protocol - read TrafficView paper |
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| 55 | * |
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| 56 | * personal note: I'm not very sure about how much info |
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| 57 | * gets to the TrafficLights |
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| 58 | */ |
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| 59 | if (bytesReceived[0] == Globals.PROT_SETOFCARS){ |
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| 60 | parsePacket(bytesReceived); |
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| 61 | } |
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| 62 | |
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| 63 | /* PROT_NEIGHBOR_DISCOVERY: Is this flooding? Or just one hop propagation? |
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| 64 | * As far as I can see, the car doesn't propagate this message. |
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| 65 | * |
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| 66 | */ |
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| 67 | if (bytesReceived[0] == Globals.PROT_NEIGHBOR_DISCOVERY){ |
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| 68 | // first record in message - the sender |
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| 69 | CarInfo sc = new CarInfo(); |
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| 70 | sc.wrap(bytesReceived, 2); |
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| 71 | |
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| 72 | boolean added = false; |
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| 73 | for (int i=0;i<trafficDB.size();i++) |
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| 74 | if ((trafficDB.get(i)).getVehicleId() == sc.getVehicleId()){ |
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| 75 | synchronized(trafficDB){ |
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| 76 | trafficDB.set(i,sc); |
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| 77 | added = true; |
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| 78 | } |
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| 79 | break; |
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| 80 | } |
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| 81 | if (!added) |
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| 82 | synchronized(trafficDB){ |
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| 83 | trafficDB.add(sc); |
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| 84 | } |
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| 85 | } |
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| 86 | |
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| 87 | /* |
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| 88 | * PROT_TL_FEEDBACK: the message received from the Traffic Lights |
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| 89 | * |
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| 90 | */ |
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| 91 | if (bytesReceived[0] == Globals.PROT_TL_FEEDBACK) { |
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| 92 | |
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| 93 | /* |
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| 94 | * The packet contains: |
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| 95 | * - the protocolType = first byte = Globals.PROT_TL_FEEDBACK |
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| 96 | * - the index of the traffic lights intersection |
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| 97 | * - the cycleLength = the next short in the packet |
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| 98 | * - the number of segments the intersection controls |
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| 99 | * - for each segment controlled (the segment is a DirectedRoadSegment class): |
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| 100 | * - the road index - | |
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| 101 | * - the point index - | |
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| 102 | * - the segment's direction |- see DirectedRoadSegment class |
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| 103 | * - the current color |
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| 104 | * - the remaining time |
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| 105 | * - the remaining no of cycles (?) |
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| 106 | * - the distance between what (?) - don't know yet |
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| 107 | * |
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| 108 | * - the following commented fragment of code checks whether if the first segment |
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| 109 | * received in the packet is really the first segment |
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| 110 | * |
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| 111 | * personal note: I don't get it why this check is necessary |
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| 112 | */ |
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| 113 | |
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| 114 | /*PeanoKey pkx = null; |
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| 115 | if (getRealPos().intersection != null) { |
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| 116 | Road rx = Globals.map.roads.get(getRealPos().intersection.segments.get(0).roadIndex); |
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| 117 | Point px = rx.points.get(getRealPos().intersection.segments.get(0).pointIndex); |
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| 118 | pkx = Globals.map.peanoKeys.get(px.getPeanoKeyIdx()); |
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| 119 | } |
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| 120 | |
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| 121 | ByteBuffer bb = ByteBuffer.wrap(bytesReceived); |
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| 122 | bb.get(); |
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| 123 | |
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| 124 | int cycleLength = bb.getShort(); |
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| 125 | int segno = bb.get(); |
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| 126 | int ridx, pidx; |
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| 127 | Road r = null; |
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| 128 | Point p = null; |
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| 129 | try { |
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| 130 | ridx = bb.getShort(); |
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| 131 | r = Globals.map.roads.get(ridx); |
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| 132 | pidx = bb.getShort(); |
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| 133 | p = r.points.get(pidx); |
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| 134 | PeanoKey pk = Globals.map.peanoKeys.get(p.getPeanoKeyIdx()); |
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| 135 | if (pkx != null && !pk.equals(pkx)) |
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| 136 | return; |
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| 137 | } catch (Exception e) { |
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| 138 | System.out.println("Bad TL feedback message: \n"); |
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| 139 | e.printStackTrace(); |
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| 140 | return; |
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| 141 | }*/ |
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| 142 | |
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| 143 | System.out.println("Car received message from TRAFFIC LIGHT"); |
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| 144 | ByteBuffer bb = ByteBuffer.wrap(bytesReceived); |
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| 145 | bb.get(); //get rid of the first byte = the protocol type (Globals.PROT_TL_FEEDBACK) |
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| 146 | |
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| 147 | int intersectionIndex = bb.getInt(); |
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| 148 | |
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| 149 | /* check if the packet was send by the next intersection traffic light */ |
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| 150 | if (intersection != null) |
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| 151 | if (intersectionIndex != Globals.map.allIntersections.indexOf(intersection)) |
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| 152 | /* if packet not from the next intersection drop? or forward to other |
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| 153 | * possible interested cars? |
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| 154 | */ |
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| 155 | return; |
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| 156 | |
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| 157 | int cycleLength = bb.getShort(); |
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| 158 | int segno = bb.get(); |
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| 159 | |
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| 160 | phaseRemainingTime = -1; |
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| 161 | currentPhase = -1; |
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| 162 | queueSize = -1; |
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| 163 | infoTime = Globals.engine.crtTime; |
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| 164 | interGreenPhaseTime = -1; |
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| 165 | this.cycleLength = cycleLength; |
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| 166 | |
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| 167 | for (int i = 0; i < segno; i++) { |
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| 168 | |
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| 169 | int ridx = bb.getShort(); |
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| 170 | Road r = Globals.map.roads.get(ridx); |
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| 171 | int pidx = bb.getShort(); |
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| 172 | //Point p = r.points.get(pidx); |
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| 173 | int dir = bb.get(); |
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| 174 | int color = bb.get(); |
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| 175 | int remaining = bb.getShort(); |
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| 176 | int interPhase = bb.getShort(); |
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| 177 | |
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| 178 | double qsize = -1; |
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| 179 | for (int j = 1; j <= r.laneNo; j++) { |
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| 180 | double qs = bb.getDouble(); |
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| 181 | if (j == this.getLane()) |
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| 182 | qsize = qs; |
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| 183 | } |
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| 184 | if (ridx == this.roadIdx |
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| 185 | && ((this.getPointIdx() > pidx && this.direction == 0 && dir == 1) || (this.getPointIdx() < pidx |
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| 186 | && this.direction == 1 && dir == 0))) { |
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| 187 | phaseRemainingTime = remaining; |
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| 188 | currentPhase = color; |
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| 189 | queueSize = qsize; |
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| 190 | interGreenPhaseTime = interPhase; |
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| 191 | if (Globals.engine.startedWithGUI && Globals.demo.mv.currentCar != null |
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| 192 | && this.equals(Globals.demo.mv.currentCar)) { |
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| 193 | Globals.demo.st.setSemTime(color, remaining); |
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| 194 | Globals.demo.st.setDemand("sw", (int) (queueSize * 1000), 0, false); |
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| 195 | } |
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| 196 | } |
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| 197 | |
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| 198 | /*if (i < segno - 1) |
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| 199 | try { |
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| 200 | ridx = bb.getShort(); |
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| 201 | r = Globals.map.roads.get(ridx); |
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| 202 | pidx = bb.getShort(); |
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| 203 | p = r.points.get(pidx); |
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| 204 | } catch (Exception e) { |
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| 205 | System.out.println("Bad TL feedback message: \n"); |
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| 206 | e.printStackTrace(); |
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| 207 | return; |
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| 208 | } |
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| 209 | */ |
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| 210 | } |
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| 211 | } |
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| 212 | } |
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| 213 | |
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| 214 | |
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| 215 | public byte[] prepareMessage(int messageType){ |
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| 216 | byte[] bytesToSend = null; |
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| 217 | //if (realPos.finished) |
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| 218 | // return null; |
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| 219 | if (!isEquipped) |
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| 220 | return null; |
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| 221 | |
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| 222 | //for messageType = 0, standard neighborDiscovery message |
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| 223 | if (messageType == STANDARD_MESSAGE_ID){ |
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| 224 | //neighbor discovery |
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| 225 | if (messageType == Globals.PROT_NEIGHBOR_DISCOVERY){ |
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| 226 | byte[] localinfo = toBytes(); |
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| 227 | ByteArrayOutputStream outBytes = new ByteArrayOutputStream(); |
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| 228 | outBytes.write(Globals.PROT_NEIGHBOR_DISCOVERY); |
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| 229 | outBytes.write(CRTDIR); |
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| 230 | try{ |
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| 231 | outBytes.write(localinfo); |
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| 232 | }catch(IOException e){ |
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| 233 | } |
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| 234 | bytesToSend = outBytes.toByteArray(); |
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| 235 | } |
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| 236 | if (messageType == Globals.PROT_SETOFCARS){ |
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| 237 | |
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| 238 | if (Globals.probabilisticModel){ |
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| 239 | decideTransmissionMode(); |
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| 240 | |
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| 241 | if (pulseMessage){ |
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| 242 | if (isPromiscuousMode() && speed > 1){ |
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| 243 | super.state = 0; |
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| 244 | setPromiscuousMode(false); |
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| 245 | } |
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| 246 | if (super.state == 3){ |
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| 247 | setPromiscuousMode(true); |
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| 248 | return null; |
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| 249 | } |
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| 250 | } |
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| 251 | else |
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| 252 | { |
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| 253 | setPromiscuousMode(false); |
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| 254 | super.state = 0; |
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| 255 | } |
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| 256 | } |
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| 257 | // if (li.getToSend().getRoadIdx() != li.getPrevSent().getRoadIdx()){ |
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| 258 | // state = CRTDIR; |
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| 259 | // } |
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| 260 | |
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| 261 | /* int carsno; |
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| 262 | ByteArrayOutputStream outBytes = null; |
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| 263 | |
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| 264 | while(true){ |
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| 265 | int roadIndex = -1, roadIndex1 = -1; |
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| 266 | int dir = -1, direction1 = -1; |
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| 267 | carsno = 1; |
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| 268 | int off = 0; |
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| 269 | outBytes = new ByteArrayOutputStream(); |
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| 270 | |
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| 271 | if (comState == CRTDIR){ |
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| 272 | roadIndex = getRoadIdx(); |
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| 273 | dir = getDirection(); |
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| 274 | }else |
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| 275 | if (comState == OPPDIR){ |
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| 276 | roadIndex = getRoadIdx(); |
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| 277 | dir = 1 - getDirection(); |
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| 278 | } |
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| 279 | |
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| 280 | outBytes.write(Globals.PROT_SETOFCARS); // leave room for number of records |
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| 281 | outBytes.write(0); // leave room for number of records |
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| 282 | outBytes.write(comState); |
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| 283 | off++; |
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| 284 | |
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| 285 | try{ |
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| 286 | //local information |
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| 287 | if (this.speed < 1 ){ |
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| 288 | super.state = 3; //promiscuous mode |
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| 289 | }else{ |
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| 290 | super.state = 0; |
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| 291 | } |
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| 292 | /* if (realPos.turningLeft) |
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| 293 | setSignal((byte)1); |
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| 294 | else |
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| 295 | setSignal((byte)0); |
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| 296 | byte[] car = toBytes(); |
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| 297 | outBytes.write(car); |
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| 298 | off += car.length; |
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| 299 | |
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| 300 | |
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| 301 | if (!pulseMessage){ |
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| 302 | ListIterator<CarInfo> it = trafficDB.listIterator(); |
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| 303 | for (; it.hasNext(); ){ |
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| 304 | CarInfo sc = it.next(); |
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| 305 | if (sc.getRoadIdx() == roadIndex && sc.getDirection() == dir){ |
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| 306 | car = sc.toBytes(); |
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| 307 | if (off + car.length > Globals.MTU_SIZE - 100){ |
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| 308 | // no more room in the packet for this car |
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| 309 | //TODO |
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| 310 | break; |
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| 311 | } |
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| 312 | outBytes.write(car); |
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| 313 | off += car.length; |
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| 314 | carsno ++; |
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| 315 | } |
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| 316 | |
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| 317 | } |
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| 318 | } |
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| 319 | }catch(IOException e){ |
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| 320 | System.out.println("Error sending cars"); |
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| 321 | e.printStackTrace(); |
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| 322 | } |
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| 323 | |
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| 324 | /* if (comState == OPPDIR && carsno == 1){ |
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| 325 | // no cars on the opposed movement |
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| 326 | // comState = REST; |
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| 327 | comState = CRTDIR; |
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| 328 | continue; |
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| 329 | }*/ |
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| 330 | // if (comState == REST && carsno == 1){ |
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| 331 | // // no more cars |
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| 332 | // comState = CRTDIR; |
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| 333 | // } |
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| 334 | /* break; |
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| 335 | } |
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| 336 | |
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| 337 | bytesToSend = outBytes.toByteArray(); |
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| 338 | bytesToSend[1] = (byte)carsno; //set the first byte to be the number of records |
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| 339 | |
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| 340 | /* if (comState == CRTDIR){ |
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| 341 | comState = OPPDIR; |
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| 342 | reportedNeighbors = 0; |
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| 343 | }else |
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| 344 | if (comState == OPPDIR) |
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| 345 | comState = CRTDIR; |
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| 346 | // comState = REST;*/ |
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| 347 | } |
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| 348 | } |
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| 349 | |
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| 350 | return bytesToSend; |
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| 351 | } |
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| 352 | } |
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| 353 | |
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