void CWeaponGravityGun::AddPellet( CGravityPellet *pPellet, CBaseEntity *pAttach, const Vector &surfaceNormal )
{
Assert(m_pelletCount<MAX_PELLETS);
m_activePellets[m_pelletCount].localNormal = surfaceNormal;
if ( pAttach )
{
EntityMatrix tmp;
tmp.InitFromEntity( pAttach );
m_activePellets[m_pelletCount].localNormal = tmp.WorldToLocalRotation( surfaceNormal );
}
m_activePellets[m_pelletCount].pellet = pPellet;
m_activePellets[m_pelletCount].parent = pAttach;
m_pelletCount++;
}
//-----------------------------------------------------------------------------
// Primary gun
//-----------------------------------------------------------------------------
void CPropAPC::AimPrimaryWeapon( const Vector &vecWorldTarget )
{
EntityMatrix parentMatrix;
parentMatrix.InitFromEntity( this, m_nMachineGunBaseAttachment );
Vector target = parentMatrix.WorldToLocal( vecWorldTarget );
float quadTarget = target.LengthSqr();
float quadTargetXY = target.x*target.x + target.y*target.y;
// Target is too close! Can't aim at it
if ( quadTarget > m_vecBarrelPos.LengthSqr() )
{
// We're trying to aim the offset barrel at an arbitrary point.
// To calculate this, I think of the target as being on a sphere with
// it's center at the origin of the gun.
// The rotation we need is the opposite of the rotation that moves the target
// along the surface of that sphere to intersect with the gun's shooting direction
// To calculate that rotation, we simply calculate the intersection of the ray
// coming out of the barrel with the target sphere (that's the new target position)
// and use atan2() to get angles
// angles from target pos to center
float targetToCenterYaw = atan2( target.y, target.x );
float centerToGunYaw = atan2( m_vecBarrelPos.y, sqrt( quadTarget - (m_vecBarrelPos.y*m_vecBarrelPos.y) ) );
float targetToCenterPitch = atan2( target.z, sqrt( quadTargetXY ) );
float centerToGunPitch = atan2( -m_vecBarrelPos.z, sqrt( quadTarget - (m_vecBarrelPos.z*m_vecBarrelPos.z) ) );
QAngle angles;
angles.Init( -RAD2DEG(targetToCenterPitch+centerToGunPitch), RAD2DEG( targetToCenterYaw + centerToGunYaw ), 0 );
SetPoseParameter( "vehicle_weapon_yaw", angles.y );
SetPoseParameter( "vehicle_weapon_pitch", angles.x );
StudioFrameAdvance();
float curPitch = GetPoseParameter( "vehicle_weapon_pitch" );
float curYaw = GetPoseParameter( "vehicle_weapon_yaw" );
m_bInFiringCone = (fabs(curPitch - angles.x) < 1e-3) && (fabs(curYaw - angles.y) < 1e-3);
}
else
{
m_bInFiringCone = false;
}
}
void GetPelletWorldCoords( int pelletIndex, Vector *worldPos, Vector *worldNormal )
{
if ( worldPos )
{
*worldPos = m_activePellets[pelletIndex].pellet->GetAbsOrigin();
}
if ( worldNormal )
{
if ( m_activePellets[pelletIndex].parent )
{
EntityMatrix tmp;
tmp.InitFromEntity( m_activePellets[pelletIndex].parent );
*worldNormal = tmp.LocalToWorldRotation( m_activePellets[pelletIndex].localNormal );
}
else
{
*worldNormal = m_activePellets[pelletIndex].localNormal;
}
}
}
void CPhysThruster::SetupForces( IPhysicsObject *pPhys, Vector &linear, AngularImpulse &angular )
{
Vector forward;
AngleVectors( GetLocalAngles(), &forward );
forward = forward * m_force;
// multiply the force by mass (it's actually just an acceleration)
if ( m_spawnflags & SF_THRUST_MASS_INDEPENDENT )
{
forward = forward * pPhys->GetMass();
}
EntityMatrix xform;
xform.InitFromEntity( m_attachedObject );
Vector origin = xform.LocalToWorld( m_localOrigin );
forward = xform.LocalToWorldRotation( forward );
// Adjust for the position of the thruster -- apply proper torque)
pPhys->CalculateVelocityOffset( forward, origin, linear, angular );
// Stay in local space always if this flag is set
if ( m_spawnflags & SF_THRUST_LOCAL_ORIENTATION )
{
linear = xform.WorldToLocalRotation( linear );
}
if ( !(m_spawnflags & SF_THRUST_FORCE) )
{
// clear out force
linear.Init();
}
if ( !(m_spawnflags & SF_THRUST_TORQUE) )
{
// clear out torque
angular.Init();
}
}
//-----------------------------------------------------------------------------
// Purpose: Spawn and initialize the fire
// Input : &position - where the fire resides
// lifetime -
//-----------------------------------------------------------------------------
void CFire::Init( const Vector &position, float scale, float attackTime, float fuel, int flags, int fireType )
{
m_flAttackTime = attackTime;
m_spawnflags = flags;
m_nFireType = fireType;
if ( flags & SF_FIRE_INFINITE )
{
fuel = 0;
}
m_flFuel = fuel;
if ( m_flFuel )
{
m_spawnflags |= SF_FIRE_DIE_PERMANENT;
}
Vector localOrigin = position;
if ( GetMoveParent() )
{
EntityMatrix parentMatrix;
parentMatrix.InitFromEntity( GetMoveParent() );
localOrigin = parentMatrix.WorldToLocal( position );
}
UTIL_SetOrigin( this, localOrigin );
SetSolid( SOLID_NONE );
m_flFireSize = scale;
m_flMaxHeat = FIRE_MAX_HEAT_LEVEL * FIRE_SCALE_FROM_SIZE(scale);
//See if we should start on
if ( m_spawnflags & SF_FIRE_START_FULL )
{
m_flHeatLevel = m_flMaxHeat;
}
m_flLastHeatLevel = 0;
}
Vector WorldBarrelPosition( void )
{
EntityMatrix tmp;
tmp.InitFromEntity( this );
return tmp.LocalToWorld( m_barrelPos );
}
void CFuncTank::TrackTarget( void )
{
trace_t tr;
bool updateTime = FALSE, lineOfSight;
QAngle angles;
Vector barrelEnd;
CBaseEntity *pTarget = NULL;
barrelEnd.Init();
// Get a position to aim for
if (m_pController)
{
// Tanks attempt to mirror the player's angles
angles = m_pController->EyeAngles();
SetNextThink( gpGlobals->curtime + 0.05 );
}
else
{
if ( IsActive() )
{
SetNextThink( gpGlobals->curtime + 0.1f );
}
else
{
return;
}
// -----------------------------------
// Get world target position
// -----------------------------------
barrelEnd = WorldBarrelPosition();
Vector worldTargetPosition;
if (m_spawnflags & SF_TANK_AIM_AT_POS)
{
worldTargetPosition = m_vTargetPosition;
}
else
{
CBaseEntity *pEntity = (CBaseEntity *)m_hTarget;
if ( !pEntity || ( pEntity->GetFlags() & FL_NOTARGET ) )
{
if ( m_targetEntityName != NULL_STRING ) // New HL2 behavior
{
m_hTarget = FindTarget( m_targetEntityName, NULL );
}
else // HL1 style
{
m_hTarget = ToBasePlayer( GetContainingEntity( UTIL_FindClientInPVS( edict() ) ) );
}
if ( m_hTarget != NULL )
{
SetNextThink( gpGlobals->curtime ); // Think again immediately
}
else
{
if ( IsActive() )
{
SetNextThink( gpGlobals->curtime + 2 ); // Wait 2 secs
}
if ( m_fireLast !=0 )
{
m_OnLoseTarget.FireOutput(this, this);
m_fireLast = 0;
}
}
return;
}
pTarget = pEntity;
// Calculate angle needed to aim at target
worldTargetPosition = pEntity->EyePosition();
}
float range = (worldTargetPosition - barrelEnd).Length();
if ( !InRange( range ) )
{
m_fireLast = 0;
return;
}
UTIL_TraceLine( barrelEnd, worldTargetPosition, MASK_SHOT, this, COLLISION_GROUP_NONE, &tr );
if (m_spawnflags & SF_TANK_AIM_AT_POS)
{
updateTime = TRUE;
m_sightOrigin = m_vTargetPosition;
}
else
{
lineOfSight = FALSE;
// No line of sight, don't track
if ( tr.fraction == 1.0 || tr.m_pEnt == pTarget )
{
lineOfSight = TRUE;
CBaseEntity *pInstance = pTarget;
if ( InRange( range ) && pInstance && pInstance->IsAlive() )
{
updateTime = TRUE;
// Sight position is BodyTarget with no noise (so gun doesn't bob up and down)
m_sightOrigin = pInstance->BodyTarget( GetLocalOrigin(), false );
}
}
}
// Convert targetPosition to parent
angles = AimBarrelAt( m_parentMatrix.WorldToLocal( m_sightOrigin ) );
}
// Force the angles to be relative to the center position
float offsetY = UTIL_AngleDistance( angles.y, m_yawCenter );
float offsetX = UTIL_AngleDistance( angles.x, m_pitchCenter );
angles.y = m_yawCenter + offsetY;
angles.x = m_pitchCenter + offsetX;
// Limit against range in y
// MDB - don't check pitch! If two func_tanks are meant to align,
// and one can pitch and the other cannot, this can lead to them getting
// different values for angles.y. Nothing is lost by not updating yaw
// because the target is not in pitch range.
bool bOutsideYawRange = ( fabs( offsetY ) > m_yawRange + m_yawTolerance );
bool bOutsidePitchRange = ( fabs( offsetX ) > m_pitchRange + m_pitchTolerance );
Vector vecToTarget = m_sightOrigin - GetLocalOrigin();
// if target is outside yaw range
if ( bOutsideYawRange )
{
if ( angles.y > m_yawCenter + m_yawRange )
{
angles.y = m_yawCenter + m_yawRange;
}
else if ( angles.y < (m_yawCenter - m_yawRange) )
{
angles.y = (m_yawCenter - m_yawRange);
}
}
if ( bOutsidePitchRange || bOutsideYawRange || ( vecToTarget.Length() < ( barrelEnd - GetAbsOrigin() ).Length() ) )
{
// Don't update if you saw the player, but out of range
updateTime = false;
}
if ( updateTime )
{
m_lastSightTime = gpGlobals->curtime;
m_persist2burst = 0;
}
// Move toward target at rate or less
float distY = UTIL_AngleDistance( angles.y, GetLocalAngles().y );
QAngle vecAngVel = GetLocalAngularVelocity();
vecAngVel.y = distY * 10;
vecAngVel.y = clamp( vecAngVel.y, -m_yawRate, m_yawRate );
// Limit against range in x
angles.x = clamp( angles.x, m_pitchCenter - m_pitchRange, m_pitchCenter + m_pitchRange );
// Move toward target at rate or less
float distX = UTIL_AngleDistance( angles.x, GetLocalAngles().x );
vecAngVel.x = distX * 10;
vecAngVel.x = clamp( vecAngVel.x, -m_pitchRate, m_pitchRate );
SetLocalAngularVelocity( vecAngVel );
SetMoveDoneTime( 0.1 );
if ( m_pController )
return;
if ( CanFire() && ( (fabs(distX) < m_pitchTolerance && fabs(distY) < m_yawTolerance) || (m_spawnflags & SF_TANK_LINEOFSIGHT) ) )
{
bool fire = FALSE;
Vector forward;
AngleVectors( GetLocalAngles(), &forward );
forward = m_parentMatrix.ApplyRotation( forward );
if ( m_spawnflags & SF_TANK_LINEOFSIGHT )
{
float length = (m_maxRange > 0) ? m_maxRange : MAX_TRACE_LENGTH;
UTIL_TraceLine( barrelEnd, barrelEnd + forward * length, MASK_SHOT, this, COLLISION_GROUP_NONE, &tr );
if ( tr.m_pEnt == pTarget )
fire = TRUE;
}
else
fire = TRUE;
if ( fire )
{
if (m_fireLast == 0)
{
m_OnAquireTarget.FireOutput(this, this);
}
FiringSequence( barrelEnd, forward, this );
}
else
{
if (m_fireLast !=0)
{
m_OnLoseTarget.FireOutput(this, this);
}
m_fireLast = 0;
}
}
else
{
if (m_fireLast !=0)
{
m_OnLoseTarget.FireOutput(this, this);
}
m_fireLast = 0;
}
}
void CAPCController::TrackTarget( void )
{
trace_t tr;
bool updateTime = FALSE, lineOfSight;
QAngle angles;
Vector barrelEnd;
CBaseEntity *pTarget = NULL;
barrelEnd.Init();
if ( IsActive() )
{
SetNextThink( gpGlobals->curtime + 0.1f );
}
else
{
return;
}
// -----------------------------------
// Get world target position
// -----------------------------------
barrelEnd = WorldBarrelPosition();
Vector worldTargetPosition;
CBaseEntity *pEntity = (CBaseEntity *)m_hTarget;
if ( !pEntity || ( pEntity->GetFlags() & FL_NOTARGET ) )
{
m_hTarget = FindTarget( m_targetEntityName, NULL );
if ( IsActive() )
{
SetNextThink( gpGlobals->curtime + 2 ); // Wait 2 sec s
}
return;
}
pTarget = pEntity;
// Calculate angle needed to aim at target
worldTargetPosition = pEntity->EyePosition();
float range = (worldTargetPosition - barrelEnd).Length();
if ( !InRange( range ) )
{
m_bFireDelayed = false;
return;
}
UTIL_TraceLine( barrelEnd, worldTargetPosition, MASK_BLOCKLOS, this, COLLISION_GROUP_NONE, &tr );
lineOfSight = FALSE;
// No line of sight, don't track
if ( tr.fraction == 1.0 || tr.m_pEnt == pTarget )
{
lineOfSight = TRUE;
CBaseEntity *pInstance = pTarget;
if ( InRange( range ) && pInstance && pInstance->IsAlive() )
{
updateTime = TRUE;
// Sight position is BodyTarget with no noise (so gun doesn't bob up and down)
m_sightOrigin = pInstance->BodyTarget( GetLocalOrigin(), false );
}
}
// Convert targetPosition to parent
angles = AimBarrelAt( m_parentMatrix.WorldToLocal( m_sightOrigin ) );
// Force the angles to be relative to the center position
float offsetY = UTIL_AngleDistance( angles.y, m_yawCenter );
float offsetX = UTIL_AngleDistance( angles.x, m_pitchCenter );
angles.y = m_yawCenter + offsetY;
angles.x = m_pitchCenter + offsetX;
// Move toward target at rate or less
float distY = UTIL_AngleDistance( angles.y, GetLocalAngles().y );
QAngle vecAngVel = GetLocalAngularVelocity();
vecAngVel.y = distY * 10;
vecAngVel.y = clamp( vecAngVel.y, -m_yawRate, m_yawRate );
// Move toward target at rate or less
float distX = UTIL_AngleDistance( angles.x, GetLocalAngles().x );
vecAngVel.x = distX * 10;
vecAngVel.x = clamp( vecAngVel.x, -m_pitchRate, m_pitchRate );
SetLocalAngularVelocity( vecAngVel );
SetMoveDoneTime( 0.1 );
Vector forward;
AngleVectors( GetLocalAngles(), &forward );
forward = m_parentMatrix.ApplyRotation( forward );
AngleVectors(angles, &forward);
if ( lineOfSight == TRUE )
{
// FIXME: This will ultimately have to deal with NPCs being in the vehicle as well
// See if the target is in a vehicle. If so, check its relationship
CBasePlayer *pPlayer = ToBasePlayer( pTarget );
if ( pPlayer && pPlayer->IsInAVehicle() )
{
IServerVehicle *pVehicle = pPlayer->GetVehicle();
if ( pVehicle->ClassifyPassenger( pPlayer, CLASS_PLAYER ) == CLASS_PLAYER)
{
if ( !m_bFireDelayed )
{
m_bFireDelayed = true;
m_flFiringDelay = gpGlobals->curtime + 1.5; // setup delay time before we start firing
return;
}
if ( gpGlobals->curtime > m_flFiringDelay )
{
m_OnFireAtTarget.Set(forward, this, this); // tell apc to fire rockets, and what direction
}
}
}
}
else
{
m_bFireDelayed = false; // reset flag since we can no longer see target
}
}
