/**
* Exponentially decreases momentum.
*/
void G_DecreaseMomentum()
{
int team;
float amount;
static float decreaseFactor = 1.0f, lastMomentumHalfLife = 0.0f;
static int nextCalculation = 0;
if ( level.time < nextCalculation )
{
return;
}
if ( g_momentumHalfLife.value <= 0.0f )
{
return;
}
// only calculate decreaseFactor if the server configuration changed
if ( lastMomentumHalfLife != g_momentumHalfLife.value )
{
// ln(2) ~= 0.6931472
decreaseFactor = exp( ( -0.6931472f / ( ( 60000.0f / DECREASE_MOMENTUM_PERIOD ) *
g_momentumHalfLife.value ) ) );
lastMomentumHalfLife = g_momentumHalfLife.value;
}
// decrease momentum
for ( team = TEAM_NONE + 1; team < NUM_TEAMS; team++ )
{
amount = level.team[ team ].momentum * ( decreaseFactor - 1.0f );
level.team[ team ].momentum += amount;
// notify legacy stage sensors
NotifyLegacyStageSensors( (team_t) team, amount );
}
MomentumChanged();
nextCalculation = level.time + DECREASE_MOMENTUM_PERIOD;
}
/**
* Has to be called after the last G_AddMomentum*Step step.
*/
void G_AddMomentumEnd() {
MomentumChanged();
}
/**
* Awards momentum to a team.
*
* Will notify the client hwo earned it if given, otherwise the whole team, with
*an event.
*/
static float AddMomentum(momentum_t type, team_t team, float amount, gentity_t* source, bool skipChangeHook) {
gentity_t* event = nullptr;
gclient_t* client;
char* clientName;
if (team <= TEAM_NONE || team >= NUM_TEAMS) {
return 0.0f;
}
// apply modifier
amount *= MomentumMod(type);
// limit a team's total
if (level.team[team].momentum + amount > MOMENTUM_MAX) {
amount = MOMENTUM_MAX - level.team[team].momentum;
}
if (amount != 0.0f) {
// add momentum to team
level.team[team].momentum += amount;
// run change hook if requested
if (!skipChangeHook) {
MomentumChanged();
}
// notify source
if (source) {
client = source->client;
if (client && client->pers.team == team) {
event = G_NewTempEntity(client->ps.origin, EV_MOMENTUM);
event->r.svFlags = SVF_SINGLECLIENT;
event->r.singleClient = client->ps.clientNum;
}
} else {
event = G_NewTempEntity(vec3_origin, EV_MOMENTUM);
event->r.svFlags = (SVF_BROADCAST | SVF_CLIENTMASK);
G_TeamToClientmask(team, &(event->r.loMask), &(event->r.hiMask));
}
if (event) {
// TODO: Use more bits for momentum value
event->s.eventParm = 0;
event->s.otherEntityNum = 0;
event->s.otherEntityNum2 = (int) (fabs(amount) * 10.0f + 0.5f);
event->s.groundEntityNum = amount < 0.0f ? true : false;
}
// notify legacy stage sensors
NotifyLegacyStageSensors(team, amount);
}
if (g_debugMomentum.integer > 0) {
if (source && source->client) {
clientName = source->client->pers.netname;
} else {
clientName = "no source";
}
Com_Printf("Momentum: %.2f to %s (%s by %s for %s)\n", amount, BG_TeamNamePlural(team), amount < 0.0f ? "lost" : "earned", clientName, MomentumTypeToReason(type));
}
return amount;
}