evaluate.cpp

Go to the documentation of this file.

/* evaluate.cpp
 *
 * Micropolis, Unix Version.  This game was released for the Unix platform
 * in or about 1990 and has been modified for inclusion in the One Laptop
 * Per Child program.  Copyright (C) 1989 - 2007 Electronic Arts Inc.  If
 * you need assistance with this program, you may contact:
 *   http://wiki.laptop.org/go/Micropolis  or email  micropolis@laptop.org.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.  You should have received a
 * copy of the GNU General Public License along with this program.  If
 * not, see <http://www.gnu.org/licenses/>.
 *
 *             ADDITIONAL TERMS per GNU GPL Section 7
 *
 * No trademark or publicity rights are granted.  This license does NOT
 * give you any right, title or interest in the trademark SimCity or any
 * other Electronic Arts trademark.  You may not distribute any
 * modification of this program using the trademark SimCity or claim any
 * affliation or association with Electronic Arts Inc. or its employees.
 *
 * Any propagation or conveyance of this program must include this
 * copyright notice and these terms.
 *
 * If you convey this program (or any modifications of it) and assume
 * contractual liability for the program to recipients of it, you agree
 * to indemnify Electronic Arts for any liability that those contractual
 * assumptions impose on Electronic Arts.
 *
 * You may not misrepresent the origins of this program; modified
 * versions of the program must be marked as such and not identified as
 * the original program.
 *
 * This disclaimer supplements the one included in the General Public
 * License.  TO THE FULLEST EXTENT PERMISSIBLE UNDER APPLICABLE LAW, THIS
 * PROGRAM IS PROVIDED TO YOU "AS IS," WITH ALL FAULTS, WITHOUT WARRANTY
 * OF ANY KIND, AND YOUR USE IS AT YOUR SOLE RISK.  THE ENTIRE RISK OF
 * SATISFACTORY QUALITY AND PERFORMANCE RESIDES WITH YOU.  ELECTRONIC ARTS
 * DISCLAIMS ANY AND ALL EXPRESS, IMPLIED OR STATUTORY WARRANTIES,
 * INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY, SATISFACTORY QUALITY,
 * FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT OF THIRD PARTY
 * RIGHTS, AND WARRANTIES (IF ANY) ARISING FROM A COURSE OF DEALING,
 * USAGE, OR TRADE PRACTICE.  ELECTRONIC ARTS DOES NOT WARRANT AGAINST
 * INTERFERENCE WITH YOUR ENJOYMENT OF THE PROGRAM; THAT THE PROGRAM WILL
 * MEET YOUR REQUIREMENTS; THAT OPERATION OF THE PROGRAM WILL BE
 * UNINTERRUPTED OR ERROR-FREE, OR THAT THE PROGRAM WILL BE COMPATIBLE
 * WITH THIRD PARTY SOFTWARE OR THAT ANY ERRORS IN THE PROGRAM WILL BE
 * CORRECTED.  NO ORAL OR WRITTEN ADVICE PROVIDED BY ELECTRONIC ARTS OR
 * ANY AUTHORIZED REPRESENTATIVE SHALL CREATE A WARRANTY.  SOME
 * JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF OR LIMITATIONS ON IMPLIED
 * WARRANTIES OR THE LIMITATIONS ON THE APPLICABLE STATUTORY RIGHTS OF A
 * CONSUMER, SO SOME OR ALL OF THE ABOVE EXCLUSIONS AND LIMITATIONS MAY
 * NOT APPLY TO YOU.
 */
 
 
 
#include "micropolis.h"
 
 
 
 
// City Classes:
// "VILLAGE", "TOWN", "CITY", "CAPITAL", "METROPOLIS", "MEGALOPOLIS"
 
// City Levels:
// "Easy", "Medium", "Hard"
 
// City Problems:
//  "CRIME", "POLLUTION", "HOUSING COSTS", "TAXES",
//  "TRAFFIC", "UNEMPLOYMENT", "FIRES"
 
 
 
 
void Micropolis::cityEvaluation()
{
    //printf("cityEvaluation totalPop %d\n", totalPop);
    if (totalPop > 0) {
        short problemTable[PROBNUM]; // Score for each problem, higher the more severe the problem is.
        for (int z = 0; z < PROBNUM; z++) {
            problemTable[z] = 0;
        }
 
        getAssessedValue();
        doPopNum();
        doProblems(problemTable);
        getScore(problemTable);
        doVotes();  // How well is the mayor doing?
        changeEval();
    } else {
        evalInit();
        cityYes = 50; // No population => no voting. Let's say 50/50.
        changeEval();
    }
}
 
 
void Micropolis::evalInit()
{
    cityYes = 0;
    cityPop = 0;
    cityPopDelta = 0;
    cityAssessedValue = 0;
    cityClass = CC_VILLAGE;
    cityScore = 500;
    cityScoreDelta = 0;
    for (int i = 0; i < PROBNUM; i++) {
        problemVotes[i] = 0;
    }
    for (int i = 0; i < CVP_PROBLEM_COMPLAINTS; i++) {
        problemOrder[i] = CVP_NUMPROBLEMS;
    }
}
 
 
void Micropolis::getAssessedValue()
{
    Quad z;
 
    z = roadTotal * 5;
    z += railTotal * 10;
    z += policeStationPop * 1000;
    z += fireStationPop * 1000;
    z += hospitalPop * 400;
    z += stadiumPop * 3000;
    z += seaportPop * 5000;
    z += airportPop * 10000;
    z += coalPowerPop * 3000;
    z += nuclearPowerPop * 6000;
 
    cityAssessedValue = z * 1000;
}
 
 
void Micropolis::doPopNum()
{
    Quad oldCityPop = cityPop;
 
    cityPop = getPopulation();
 
    if (oldCityPop == -1) {
        oldCityPop = cityPop;
    }
 
    cityPopDelta = cityPop - oldCityPop;
    cityClass = getCityClass(cityPop);
}
 
Quad Micropolis::getPopulation()
{
    Quad pop = (resPop + (comPop + indPop) * 8L) * 20L;
    return pop;
}
 
 
CityClass Micropolis::getCityClass(Quad cityPopulation)
{
    CityClass cityClassification = CC_VILLAGE;
 
    if (cityPopulation > 2000) {
        cityClassification = CC_TOWN;
    }
    if (cityPopulation > 10000) {
        cityClassification = CC_CITY;
    }
    if (cityPopulation > 50000) {
        cityClassification = CC_CAPITAL;
    }
    if (cityPopulation > 100000) {
        cityClassification = CC_METROPOLIS;
    }
    if (cityPopulation > 500000) {
        cityClassification = CC_MEGALOPOLIS;
    }
 
    return cityClassification;
}
 
void Micropolis::doProblems(short problemTable[PROBNUM])
{
    bool problemTaken[PROBNUM]; // Which problems are taken?
 
    for (int z = 0; z < PROBNUM; z++) {
        problemTaken[z] = false;
        problemTable[z] = 0;
    }
 
    problemTable[CVP_CRIME]        = crimeAverage;                /* Crime */
    problemTable[CVP_POLLUTION]    = pollutionAverage;            /* Pollution */
    problemTable[CVP_HOUSING]      = landValueAverage * 7 / 10;   /* Housing */
    problemTable[CVP_TAXES]        = cityTax * 10;                /* Taxes */
    problemTable[CVP_TRAFFIC]      = getTrafficAverage();         /* Traffic */
    problemTable[CVP_UNEMPLOYMENT] = getUnemployment();           /* Unemployment */
    problemTable[CVP_FIRE]         = getFireSeverity();           /* Fire */
    voteProblems(problemTable);
 
    for (int z = 0; z < CVP_PROBLEM_COMPLAINTS; z++) {
        // Find biggest problem not taken yet
        int maxVotes = 0;
        int bestProblem = CVP_NUMPROBLEMS;
        for (int i = 0; i < CVP_NUMPROBLEMS; i++) {
            if ((problemVotes[i] > maxVotes) && (!problemTaken[i])) {
                bestProblem = i;
                maxVotes = problemVotes[i];
            }
        }
 
        // bestProblem == CVP_NUMPROBLEMS means no problem found
        problemOrder[z] = bestProblem;
        if (bestProblem < CVP_NUMPROBLEMS) {
            problemTaken[bestProblem] = true;
        }
        // else: No problem found.
        //       Repeating the procedure will give the same result.
        //       Optimize by filling all remaining entries, and breaking out
    }
}
 
 
void Micropolis::voteProblems(const short problemTable[PROBNUM])
{
    for (int z = 0; z < PROBNUM; z++) {
        problemVotes[z] = 0;
    }
 
    int problem = 0; // Problem to vote for
    int voteCount = 0; // Number of votes
    int loopCount = 0; // Number of attempts
    while (voteCount < 100 && loopCount < 600) {
        if (getRandom(300) < problemTable[problem]) {
            problemVotes[problem]++;
            voteCount++;
        }
        problem++;
        if (problem > PROBNUM) {
            problem = 0;
        }
        loopCount++;
    }
}
 
 
short Micropolis::getTrafficAverage()
{
    Quad trafficTotal;
    short x, y, count;
 
    trafficTotal = 0;
    count = 1;
    for (x=0; x < WORLD_W; x += landValueMap.MAP_BLOCKSIZE) {
        for (y=0; y < WORLD_H; y += landValueMap.MAP_BLOCKSIZE) {
            if (landValueMap.worldGet(x, y) > 0) {
                trafficTotal += trafficDensityMap.worldGet(x, y);
                count++;
            }
        }
    }
 
    trafficAverage = (short)((trafficTotal / count) * 2.4);
 
    return trafficAverage;
}
 
 
short Micropolis::getUnemployment()
{
    short b = (comPop + indPop) * 8;
 
    if (b == 0) {
        return 0;
    }
 
    // Ratio total people / working. At least 1.
    float r = ((float)resPop) / b;
 
    b = (short)((r - 1) * 255); // (r - 1) is the fraction unemployed people
    return min(b, (short)255);
}
 
 
short Micropolis::getFireSeverity()
{
    return min(firePop * 5, 255);
}
 
 
void Micropolis::getScore(const short problemTable[PROBNUM])
{
    int x, z;
    short cityScoreLast;
 
    cityScoreLast = cityScore;
    x = 0;
 
    for (z = 0; z < CVP_NUMPROBLEMS; z++) {
        x += problemTable[z];       /* add 7 probs */
    }
 
    x = x / 3;                    /* 7 + 2 average */
    x = min(x, 256);
 
    z = clamp((256 - x) * 4, 0, 1000);
 
    if (resCap) {
        z = (int)(z * .85);
    }
 
    if (comCap) {
        z = (int)(z * .85);
    }
 
    if (indCap) {
        z = (int)(z * .85);
    }
 
    if (roadEffect < MAX_ROAD_EFFECT)  {
        z -= MAX_ROAD_EFFECT - roadEffect;
    }
 
    if (policeEffect < MAX_POLICE_STATION_EFFECT) {
        // 10.0001 = 10000.1 / 1000, 1/10.0001 is about 0.1
        z = (int)(z * (0.9 + (policeEffect / (10.0001 * MAX_POLICE_STATION_EFFECT))));
    }
 
    if (fireEffect < MAX_FIRE_STATION_EFFECT) {
        // 10.0001 = 10000.1 / 1000, 1/10.0001 is about 0.1
        z = (int)(z * (0.9 + (fireEffect / (10.0001 * MAX_FIRE_STATION_EFFECT))));
    }
 
    if (resValve < -1000) {
        z = (int)(z * .85);
    }
 
    if (comValve < -1000) {
        z = (int)(z * .85);
    }
 
    if (indValve < -1000) {
        z = (int)(z * .85);
    }
 
    float SM = 1.0;
    if (cityPop == 0 || cityPopDelta == 0) {
        SM = 1.0; // there is nobody or no migration happened
 
    } else if (cityPopDelta == cityPop) {
        SM = 1.0; // city sprang into existence or doubled in size
 
    } else if (cityPopDelta > 0) {
        SM = ((float)cityPopDelta / cityPop) + 1.0f;
 
    } else if (cityPopDelta < 0) {
        SM = 0.95f + ((float)cityPopDelta / (cityPop - cityPopDelta));
    }
 
    z = (int)(z * SM);
    z = z - getFireSeverity() - cityTax; // dec score for fires and taxes
 
    float TM = unpoweredZoneCount + poweredZoneCount;   // dec score for unpowered zones
    if (TM > 0.0) {
        z = (int)(z * (float)(poweredZoneCount / TM));
    } else {
    }
 
    z = clamp(z, 0, 1000);
 
    cityScore = (cityScore + z) / 2;
 
    cityScoreDelta = cityScore - cityScoreLast;
}
 
 
void Micropolis::doVotes()
{
    int z;
 
    cityYes = 0;
 
    for (z = 0; z < 100; z++) {
        if (getRandom(1000) < cityScore) {
            cityYes++;
        }
    }
}
 
 
void Micropolis::doScoreCard()
{
    // The user interface should pull these raw values out and format
    // them. The simulator core used to format them and push them out,
    // but the user interface should pull them out and format them
    // itself.
 
    // City Evaluation ${FormatYear(currentYear())}
    // Public Opinion
    //   Is the mayor doing a good job?
    //     Yes: ${FormatPercent(cityYes)}
    //     No: ${FormatPercent(100 - cityYes)}
    //   What are the worst problems?
    //     for i in range(0, CVP_PROBLEM_COMPLAINTS),
    //                 while problemOrder[i] < CVP_NUMPROBLEMS:
    //     ${probStr[problemOrder[i]]}:
    //                  ${FormatPercent(problemVotes[problemOrder[i]])}
    // Statistics
    //   Population: ${FormatNumber(cityPop)}
    //   Net Migration: ${FormatNumber(cityPopDelta)} (last year)
    //   Assessed Value: ${FormatMoney(cityAssessedValue))
    //   Category: ${cityClassStr[cityClass]}
    //   Game Level: ${cityLevelStr[gameLevel]}
 
    callback->updateEvaluation(this, callbackVal);
}
 
void Micropolis::changeEval()
{
    //printf("changeEval\n");
    evalChanged = true;
}
 
 
void Micropolis::scoreDoer()
{
    //printf("scoreDoer evalChanged %d\n", evalChanged);
    if (evalChanged) {
        doScoreCard();
        evalChanged = false;
    }
}
 
int Micropolis::countProblems()
{
    int i;
    for (i = 0; i < CVP_PROBLEM_COMPLAINTS; i++) {
        if (problemOrder[i] == CVP_NUMPROBLEMS) {
            break;
        }
    }
    return i;
}
 
int Micropolis::getProblemNumber(int i)
{
    if (i < 0 || i >= CVP_PROBLEM_COMPLAINTS
                        || problemOrder[i] == CVP_NUMPROBLEMS) {
        return -1;
    } else {
        return problemOrder[i];
    }
}
 
 
int Micropolis::getProblemVotes(int i)
{
    if (i < 0 || i >= CVP_PROBLEM_COMPLAINTS
                        || problemOrder[i] == CVP_NUMPROBLEMS) {
        return -1;
    } else {
        return problemVotes[problemOrder[i]];
    }
}