RandomUnits.cpp

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/*
 *  RandomUnits.cpp
 *  hog2
 *
 *  Created by Nathan Sturtevant on 4/23/07.
 *  Copyright 2007 Nathan Sturtevant, University of Alberta. All rights reserved.
 *
 */
 
#include "RandomUnits.h"
#include "FPUtil.h"
 
bool RandomUnit::MakeMove(MapEnvironment *, OccupancyInterface<xyLoc, tDirection> *, MapSimulationInfo *, tDirection &dir)
{
        dir = possibleDir[lastIndex];
        return true;
}
 
void RandomUnit::UpdateLocation(MapEnvironment *me, xyLoc &l, bool success, MapSimulationInfo *si)
{
        MapUnit::UpdateLocation(me, l, success, si);
        if (success)
        { // I moved successfully
                if (random()%20 == 7)
                        lastIndex = random()%9;
        }
        else {
                lastIndex = random()%9;
        }
}
 
bool RandomerUnit::MakeMove(MapEnvironment *, OccupancyInterface<xyLoc, tDirection> *, MapSimulationInfo *, tDirection &dir)
{
        dir = possibleDir[random()%9];
        return true;
}
 
bool BilliardBallUnit::MakeMove(MapEnvironment *, OccupancyInterface<xyLoc, tDirection> *, MapSimulationInfo *, tDirection &dir)
{
        dir = possibleDir[lastIndex];
        return true;
}
 
void BilliardBallUnit::UpdateLocation(MapEnvironment *me, xyLoc &l, bool success, MapSimulationInfo *si)
{
        MapUnit::UpdateLocation(me, l, success, si);
        if (success)
        { 
                // I moved successfully
                // If I was staying put then I should start moving after the coolOffPeriod expires
                if (lastIndex == kStayIndex && --collisionStatus <= 0) 
                        lastIndex = random()%9;
                // If I was moving then I may change my mind with probability probDirChange
                if (lastIndex != kStayIndex && fless(random()%10000,probDirChange*10000.0))
                        lastIndex = random()%9;
        }
        else {
                // I was not successful in my move (i.e., I collided)
                // start resting
                collisionStatus = coolOffPeriod;
                lastIndex = coolOffPeriod > 0 ? kStayIndex : random()%9;                
        }
}
 
bool TeleportUnit::MakeMove(MapEnvironment *me, OccupancyInterface<xyLoc, tDirection> *, MapSimulationInfo *, tDirection &dir)
{
        if (timer == 0)
        {
                timer = stayTime;
                loc.x = random()%me->GetMap()->GetMapWidth();
                loc.y = random()%me->GetMap()->GetMapHeight();
                dir = kTeleport;
                return true;
        }
        timer--;
        dir = kStay;
        return true;
}