g_match.cpp

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/*
All original material Copyright (C) 2002-2025 UFO: Alien Invasion.
 
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 2
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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
 
#include "g_match.h"
#include "g_local.h"
#include "g_actor.h"
#include "g_ai.h"
#include "g_edicts.h"
#include "g_trigger.h"
#include "g_utils.h"
#include "g_vis.h"

static int G_GetEarnedExperience (abilityskills_t skill, Edict* ent)
{
    character_t* chr = &ent->chr;
 
    int experience = 0;
 
    switch (skill) {
    case ABILITY_POWER: {
        const float weight = chr->scoreMission->carriedWeight / level.actualRound;
        const float penalty = GET_ENCUMBRANCE_PENALTY(weight, chr->score.skills[ABILITY_POWER]);
        experience = 50 * (weight / WEIGHT_FACTOR / chr->score.skills[ABILITY_POWER]) / penalty;
        break;
    }
    case ABILITY_ACCURACY:
        /* skip skills < ABILITY_NUM_TYPES, they are abilities not real skills */
        for (int i = ABILITY_NUM_TYPES; i < SKILL_NUM_TYPES; i++)
            if (i == SKILL_SNIPER)
                experience += 60 * (chr->scoreMission->hits[i][KILLED_ENEMIES] + chr->scoreMission->hitsSplash[i][KILLED_ENEMIES]);
            else
                experience += 40 * (chr->scoreMission->hits[i][KILLED_ENEMIES] + chr->scoreMission->hitsSplash[i][KILLED_ENEMIES]);
        break;
    case ABILITY_MIND:
        experience = 50 + 100 * chr->scoreMission->kills[KILLED_ENEMIES];
        break;
    case SKILL_CLOSE:
        experience = 180 * (chr->scoreMission->hits[skill][KILLED_ENEMIES] + chr->scoreMission->hitsSplash[skill][KILLED_ENEMIES]);
        break;
#if 0
    case SKILL_HEAVY:
        experience = 180 * (chr->scoreMission->hits[skill][KILLED_ENEMIES] + chr->scoreMission->hitsSplash[skill][KILLED_ENEMIES]);
        break;
#endif
    case SKILL_ASSAULT:
        experience = 180 * (chr->scoreMission->hits[skill][KILLED_ENEMIES] + chr->scoreMission->hitsSplash[skill][KILLED_ENEMIES]);
        break;
    case SKILL_SNIPER:
        experience = 180 * (chr->scoreMission->hits[skill][KILLED_ENEMIES] + chr->scoreMission->hitsSplash[skill][KILLED_ENEMIES]);
        break;
    case SKILL_EXPLOSIVE:
        experience = 180 * (chr->scoreMission->hits[skill][KILLED_ENEMIES] + chr->scoreMission->hitsSplash[skill][KILLED_ENEMIES]);
        break;
    default:
        break;
    }
 
    return experience;
}

static void G_UpdateCharacterExperience (Edict* ent)
{
    character_t* chr = &ent->chr;
 
    /* Robots/UGVs do not get skill-upgrades. */
    if (chr->teamDef->robot)
        return;
 
    unsigned int totalGainedXP = 0;
    for (int i = 0; i < SKILL_NUM_TYPES; i++) {
        const abilityskills_t skill = static_cast<abilityskills_t>(i);
        const int gainedXP = G_GetEarnedExperience(skill, ent);
 
        chr->score.experience[i] += gainedXP;
        totalGainedXP += gainedXP;
    }
 
    /* Speed and health are handled separately */
    chr->score.experience[ABILITY_SPEED] += totalGainedXP / 5;
    /* This is health */
    chr->score.experience[SKILL_NUM_TYPES] += totalGainedXP / 5;
}

void G_MatchEndTrigger (int team, int timeGap)
{
    bool foundNextMap = false;
    Edict* ent = nullptr;
 
    while ((ent = G_EdictsGetTriggerNextMaps(ent)) != nullptr) {
        if (ent->getTeam() == team) {
            ent->think = Think_NextMapTrigger;
            ent->nextthink = 1;
            foundNextMap = true;
        }
    }
 
    if (!foundNextMap) {
        const int realTimeGap = timeGap > 0 ? level.time + timeGap : 1;
        level.winningTeam = team;
        level.intermissionTime = realTimeGap;
    }
}

static void G_SendCharacterData (const Actor* actor)
{
    assert(actor);
 
    /* write character number */
    gi.WriteShort(actor->chr.ucn);
 
    gi.WriteShort(actor->HP);
    gi.WriteByte(actor->getStun());
    gi.WriteByte(actor->morale);
 
    for (int k = 0; k < BODYPART_MAXTYPE; ++k)
        gi.WriteByte(actor->chr.wounds.woundLevel[k] + actor->chr.wounds.treatmentLevel[k]);

    for (int k = 0; k < SKILL_NUM_TYPES + 1; k++)
        gi.WriteLong(actor->chr.score.experience[k]);
    for (int k = 0; k < KILLED_NUM_TYPES; k++)
        gi.WriteShort(actor->chr.score.kills[k]);
    for (int k = 0; k < KILLED_NUM_TYPES; k++)
        gi.WriteShort(actor->chr.score.stuns[k]);
    gi.WriteShort(actor->chr.score.assignedMissions);
}

static void G_MatchSendResults (int team, bool nextmap)
{
    Edict* attacker = nullptr;
    Actor* actor = nullptr;
    /* Calculate new scores/skills for the soldiers. */
    while ((actor = G_EdictsGetNextLivingActor(actor))) {
        if (!G_IsAI(actor))
            G_UpdateCharacterExperience(actor);
        else if (actor->getTeam() == team)
            attacker = actor;
    }
 
    /* if aliens won, make sure every soldier that is not in the rescue zone dies */
    if (team == TEAM_ALIEN) {
        actor = nullptr;
        while ((actor = G_EdictsGetNextLivingActor(actor)))
            if (actor->getTeam() != team && !actor->isInRescueZone()) {
                actor->HP = 0;
                G_ActorDieOrStun(actor, attacker);
            }
    }
 
    G_VisMakeEverythingVisible();
 
    /* send results */
    G_EventAdd(PM_ALL, EV_RESULTS, -1);
    gi.WriteByte(MAX_TEAMS);
    gi.WriteByte(team);
    gi.WriteByte(nextmap);
 
    for (int i = 0; i < MAX_TEAMS; i++) {
        gi.WriteByte(level.num_spawned[i]);
        gi.WriteByte(level.num_alive[i]);
    }
 
    for (int i = 0; i <= MAX_TEAMS; i++)
        for (int j = 0; j < MAX_TEAMS; j++)
            gi.WriteByte(level.num_kills[i][j]);
 
    for (int i = 0; i <= MAX_TEAMS; i++)
        for (int j = 0; j < MAX_TEAMS; j++)
            gi.WriteByte(level.num_stuns[i][j]);
 
    /* how many actors */
    int n  = 0;
    actor = nullptr;
    while ((actor = G_EdictsGetNextActor(actor)))
        if (!G_IsAI(actor))
            n++;
 
    /* number of soldiers */
    gi.WriteByte(n);
 
    if (n) {
        actor = nullptr;
        while ((actor = G_EdictsGetNextActor(actor))) {
            if (!G_IsAI(actor)) {
                G_SendCharacterData(actor);
            }
        }
    }
 
    G_EventEnd();
}

bool G_MatchDoEnd (void)
{
    /* check for intermission */
    if (level.intermissionTime > 0.0f && level.time > level.intermissionTime) {
        G_PrintStats("End of game - Team %i is the winner", level.winningTeam);
        G_MatchSendResults(level.winningTeam, level.nextMapSwitch);
 
        /* now we cleanup the AI */
        AIL_Cleanup();
 
        if (level.mapEndCommand != nullptr) {
            gi.AddCommandString("%s\n", level.mapEndCommand);
        }
 
        level.intermissionTime = 0.0f;
        level.winningTeam = 0;
        return true;
    }
 
    return false;
}

void G_MatchEndCheck (void)
{
    if (level.intermissionTime > 0.0f) /* already decided */
        return;
 
    if (!level.numplayers) {
        G_MatchEndTrigger(0, 0);
        return;
    }
 
    int last = 0;
    int activeTeams = 0;
    for (int i = 1; i < MAX_TEAMS; i++) {
        Actor* actor = nullptr;
        /* search for living but not stunned actors - there must at least be one actor
         * that is still able to attack or defend himself */
        while ((actor = G_EdictsGetNextLivingActorOfTeam(actor, i)) != nullptr) {
            if (!actor->isStunned()) {
                last = i;
                activeTeams++;
                break;
            }
        }
    }

    /* prepare for sending results */
    if (activeTeams < 2) {
        const int timeGap = (level.activeTeam == TEAM_ALIEN ? 10 : 3);
        G_MatchEndTrigger(activeTeams == 1 ? last : 0, timeGap);
    }
}

bool G_MatchIsRunning (void)
{
    if (level.intermissionTime > 0.0f)
        return false;
    return (level.activeTeam != TEAM_NO_ACTIVE);
}