// Project the given position onto the track and return the point and how far along that projected position is
void CTeamTrainWatcher::ProjectPointOntoPath( const Vector &pos, Vector *posOnPathResult, float *distanceAlongPathResult ) const
{
CPathTrack *nextNode = NULL;
CPathTrack *node = m_hStartNode;
Vector toPos;
Vector alongPath;
float distanceAlong = 0.0f;
Vector closestPointOnPath = vec3_origin;
float closestPerpendicularDistanceSq = FLT_MAX;
float closestDistanceAlongPath = FLT_MAX;
CPathTrack::BeginIteration();
while( node )
{
node->Visit();
nextNode = node->GetNext();
if ( !nextNode || nextNode->HasBeenVisited() )
break;
alongPath = nextNode->GetAbsOrigin() - node->GetAbsOrigin();
float segmentLength = alongPath.NormalizeInPlace();
toPos = pos - node->GetAbsOrigin();
float segmentOverlap = DotProduct( toPos, alongPath );
if ( segmentOverlap >= 0.0f && segmentOverlap < segmentLength )
{
// projection is within segment bounds
Vector onPath = node->GetAbsOrigin() + alongPath * segmentOverlap;
float perpendicularDistanceSq = ( onPath - pos ).LengthSqr();
if ( perpendicularDistanceSq < closestPerpendicularDistanceSq )
{
closestPointOnPath = onPath;
closestPerpendicularDistanceSq = perpendicularDistanceSq;
closestDistanceAlongPath = distanceAlong + segmentOverlap;
}
}
distanceAlong += segmentLength;
node = nextNode;
}
CPathTrack::EndIteration();
if ( posOnPathResult )
{
*posOnPathResult = closestPointOnPath;
}
if ( distanceAlongPathResult )
{
*distanceAlongPathResult = closestDistanceAlongPath;
}
}
void CTeamTrainWatcher::WatcherThink( void )
{
if ( m_bWaitingToRecede )
{
if ( m_flRecedeTime < gpGlobals->curtime )
{
m_bWaitingToRecede = false;
// don't actually recede in overtime
if ( TeamplayRoundBasedRules() && !TeamplayRoundBasedRules()->InOvertime() )
{
// fire recede output
m_OnTrainStartRecede.FireOutput( this, this );
HandleTrainMovement( true );
}
}
}
bool bDisableAlarm = (TeamplayRoundBasedRules() && TeamplayRoundBasedRules()->State_Get() != GR_STATE_RND_RUNNING);
if ( bDisableAlarm )
{
StopCaptureAlarm();
}
// given its next node, we can walk the nodes and find the linear
// distance to the next cp node, or to the goal node
CFuncTrackTrain *pTrain = m_hTrain;
if ( pTrain )
{
int iOldTrainSpeedLevel = m_iTrainSpeedLevel;
// how fast is the train moving?
float flSpeed = pTrain->GetDesiredSpeed();
// divide speed into regions
// anything negative is -1
if ( flSpeed < 0 )
{
m_iTrainSpeedLevel = -1;
// even though our desired speed might be negative,
// our actual speed might be zero if we're at a dead end...
// this will turn off the < image when the train is done moving backwards
if ( pTrain->GetCurrentSpeed() == 0 )
{
m_iTrainSpeedLevel = 0;
}
}
else if ( flSpeed > m_flSpeedLevels[2] )
{
m_iTrainSpeedLevel = 3;
}
else if ( flSpeed > m_flSpeedLevels[1] )
{
m_iTrainSpeedLevel = 2;
}
else if ( flSpeed > m_flSpeedLevels[0] )
{
m_iTrainSpeedLevel = 1;
}
else
{
m_iTrainSpeedLevel = 0;
}
if ( m_iTrainSpeedLevel != iOldTrainSpeedLevel )
{
// make sure the sparks are off if we're not moving backwards anymore
if ( m_bHandleTrainMovement )
{
if ( m_iTrainSpeedLevel == 0 && iOldTrainSpeedLevel != 0 )
{
HandleSparks( false );
}
}
// play any concepts that we might need to play
if ( TeamplayRoundBasedRules() )
{
if ( m_iTrainSpeedLevel == 0 && iOldTrainSpeedLevel != 0 )
{
TeamplayRoundBasedRules()->HaveAllPlayersSpeakConceptIfAllowed( MP_CONCEPT_CART_STOP );
m_flNextSpeakForwardConceptTime = 0;
}
else if ( m_iTrainSpeedLevel < 0 && iOldTrainSpeedLevel == 0 )
{
TeamplayRoundBasedRules()->HaveAllPlayersSpeakConceptIfAllowed( MP_CONCEPT_CART_MOVING_BACKWARD );
m_flNextSpeakForwardConceptTime = 0;
}
}
}
if ( m_iTrainSpeedLevel > 0 && m_flNextSpeakForwardConceptTime < gpGlobals->curtime )
{
if ( m_hAreaCap.Get() )
{
for ( int i = 1; i <= gpGlobals->maxClients; i++ )
{
CBaseMultiplayerPlayer *pPlayer = ToBaseMultiplayerPlayer( UTIL_PlayerByIndex( i ) );
if ( pPlayer )
{
if ( m_hAreaCap->IsTouching( pPlayer ) )
{
pPlayer->SpeakConceptIfAllowed( MP_CONCEPT_CART_MOVING_FORWARD );
}
}
}
}
m_flNextSpeakForwardConceptTime = gpGlobals->curtime + 3.0;
}
// what percent progress are we at?
CPathTrack *pNode = ( pTrain->m_ppath ) ? pTrain->m_ppath->GetNext() : NULL;
// if we're moving backwards, GetNext is going to be wrong
if ( flSpeed < 0 )
{
pNode = pTrain->m_ppath;
}
if ( pNode )
{
float flDistanceToGoal = 0;
// distance to next node
Vector vecDir = pNode->GetLocalOrigin() - pTrain->GetLocalOrigin();
flDistanceToGoal = vecDir.Length();
// distance of next node to goal node
if ( pNode && pNode != m_hGoalNode )
{
// walk this until we get to goal node, or a dead end
CPathTrack *pPrev = pNode;
pNode = pNode->GetNext();
while ( pNode )
{
vecDir = pNode->GetLocalOrigin() - pPrev->GetLocalOrigin();
flDistanceToGoal += vecDir.Length();
if ( pNode == m_hGoalNode )
break;
pPrev = pNode;
pNode = pNode->GetNext();
}
}
if ( m_flTotalPathDistance <= 0 )
{
Assert( !"No path distance in team_train_watcher\n" );
m_flTotalPathDistance = 1;
}
m_flTotalProgress = clamp( 1.0 - ( flDistanceToGoal / m_flTotalPathDistance ), 0.0, 1.0 );
m_flTrainDistanceFromStart = m_flTotalPathDistance - flDistanceToGoal;
// play alert sounds if necessary
for ( int iCount = 0 ; iCount < m_iNumCPLinks ; iCount++ )
{
if ( m_flTrainDistanceFromStart < m_CPLinks[iCount].flDistanceFromStart - TEAM_TRAIN_ALERT_DISTANCE )
{
// back up twice the alert distance before resetting our flag to play the warning again
if ( ( m_flTrainDistanceFromStart < m_CPLinks[iCount].flDistanceFromStart - ( TEAM_TRAIN_ALERT_DISTANCE * 2 ) ) || // has receded back twice the alert distance or...
( !m_bTrainCanRecede ) ) // used to catch the case where the train doesn't normally recede but has rolled back down a hill away from the CP
{
// reset our alert flag
m_CPLinks[iCount].bAlertPlayed = false;
}
}
else
{
if ( m_flTrainDistanceFromStart < m_CPLinks[iCount].flDistanceFromStart && !m_CPLinks[iCount].bAlertPlayed )
{
m_CPLinks[iCount].bAlertPlayed = true;
bool bFinalPointInMap = false;
CTeamControlPoint *pCurrentPoint = m_CPLinks[iCount].hCP.Get();
CTeamControlPointMaster *pMaster = g_hControlPointMasters.Count() ? g_hControlPointMasters[0] : NULL;
if ( pMaster )
{
// if we're not playing mini-rounds
if ( !pMaster->PlayingMiniRounds() )
{
for ( int i = FIRST_GAME_TEAM ; i < MAX_CONTROL_POINT_TEAMS ; i++ )
{
if ( ObjectiveResource() && ObjectiveResource()->TeamCanCapPoint( pCurrentPoint->GetPointIndex(), i ) )
{
if ( pMaster->WouldNewCPOwnerWinGame( pCurrentPoint, i ) )
{
bFinalPointInMap = true;
}
}
}
}
else
{
// or this is the last round
if ( pMaster->NumPlayableControlPointRounds() == 1 )
{
CTeamControlPointRound *pRound = pMaster->GetCurrentRound();
if ( pRound )
{
for ( int i = FIRST_GAME_TEAM ; i < MAX_CONTROL_POINT_TEAMS ; i++ )
{
if ( ObjectiveResource() && ObjectiveResource()->TeamCanCapPoint( pCurrentPoint->GetPointIndex(), i ) )
{
if ( pRound->WouldNewCPOwnerWinGame( pCurrentPoint, i ) )
{
bFinalPointInMap = true;
}
}
}
}
}
}
}
PlayCaptureAlert( pCurrentPoint, bFinalPointInMap );
}
}
}
// check to see if we need to start or stop the alarm
if ( flDistanceToGoal <= TEAM_TRAIN_ALARM_DISTANCE )
{
if ( ObjectiveResource() )
{
ObjectiveResource()->SetTrackAlarm( GetTeamNumber(), true );
}
if ( !bDisableAlarm )
{
if ( !m_pAlarm )
{
if ( m_iNumCPLinks > 0 && !m_bAlarmPlayed )
{
// start the alarm at the final point
StartCaptureAlarm( m_CPLinks[m_iNumCPLinks-1].hCP.Get() );
m_bAlarmPlayed = true; // used to prevent the alarm from starting again on maps where the train doesn't recede (alarm loops for short time then only plays singles)
}
}
else
{
if ( !m_bTrainCanRecede ) // if the train won't recede, we only want to play the alarm for a short time
{
if ( m_flAlarmEndTime > 0 && m_flAlarmEndTime < gpGlobals->curtime )
{
StopCaptureAlarm();
SetContextThink( &CTeamTrainWatcher::WatcherAlarmThink, gpGlobals->curtime + TW_ALARM_THINK_INTERVAL, TW_ALARM_THINK );
}
}
}
}
}
else
{
if ( ObjectiveResource() )
{
ObjectiveResource()->SetTrackAlarm( GetTeamNumber(), false );
}
StopCaptureAlarm();
m_bAlarmPlayed = false;
}
}
if ( tf_show_train_path.GetBool() )
{
CPathTrack *nextNode = NULL;
CPathTrack *node = m_hStartNode;
CPathTrack::BeginIteration();
while( node )
{
node->Visit();
nextNode = node->GetNext();
if ( !nextNode || nextNode->HasBeenVisited() )
break;
NDebugOverlay::Line( node->GetAbsOrigin(), nextNode->GetAbsOrigin(), 255, 255, 0, true, NDEBUG_PERSIST_TILL_NEXT_SERVER );
node = nextNode;
}
CPathTrack::EndIteration();
// show segment of path train is actually on
node = pTrain->m_ppath;
if ( node && node->GetNext() )
{
NDebugOverlay::HorzArrow( node->GetAbsOrigin(), node->GetNext()->GetAbsOrigin(), 5.0f, 255, 0, 0, 255, true, NDEBUG_PERSIST_TILL_NEXT_SERVER );
}
}
}
SetContextThink( &CTeamTrainWatcher::WatcherThink, gpGlobals->curtime + 0.1, TW_THINK );
}