When trying to dispatch a particle effect from the server to the client
using DispatchParticleEffect( const char *pszParticleName,
ParticleAttachment_t iAttachType, CBaseEntity *pEntity, const char
*pszAttachmentName, bool bResetAllParticlesOnEntity ) I noticed that it
wasn't working at all, meaning the client never received the dispatch. My
first intuition was that it was being suppressed by prediction, but that
quickly resolved to not being the case.
I finally resolved that it was because when you dispatch an effect, the
recipient list is calculated based on whoever is in PAS range. Well, the
origin for the effect is never initialized when you try to dispatch an
effect that originates from an attachment point on an entity! The following
is a fix to this problem:
particle_parse.cpp, Lines 196 - 219
In Function: void DispatchParticleEffect( const char *pszParticleName,
ParticleAttachment_t iAttachType, CBaseEntity *pEntity, int
iAttachmentPoint, bool bResetAllParticlesOnEntity )
OLD FUNCTION:
void DispatchParticleEffect( const char *pszParticleName,
ParticleAttachment_t iAttachType, CBaseEntity *pEntity, int
iAttachmentPoint, bool bResetAllParticlesOnEntity )
{
CEffectData data;
data.m_nHitBox = GetParticleSystemIndex( pszParticleName );
if ( pEntity )
{
#ifdef CLIENT_DLL
data.m_hEntity = pEntity;
#else
data.m_nEntIndex = pEntity->entindex();
#endif
data.m_fFlags |= PARTICLE_DISPATCH_FROM_ENTITY;
}
data.m_nDamageType = iAttachType;
data.m_nAttachmentIndex = iAttachmentPoint;
if ( bResetAllParticlesOnEntity )
{
data.m_fFlags |= PARTICLE_DISPATCH_RESET_PARTICLES;
}
DispatchEffect( "ParticleEffect", data );
}
CORRECTED FUNCTION:
void DispatchParticleEffect( const char *pszParticleName,
ParticleAttachment_t iAttachType, CBaseEntity *pEntity, int
iAttachmentPoint, bool bResetAllParticlesOnEntity )
{
CEffectData data;
data.m_nHitBox = GetParticleSystemIndex( pszParticleName );
if ( pEntity )
{
data.m_vOrigin = pEntity->GetAbsOrigin();
#ifdef CLIENT_DLL
data.m_hEntity = pEntity;
#else
data.m_nEntIndex = pEntity->entindex();
#endif
data.m_fFlags |= PARTICLE_DISPATCH_FROM_ENTITY;
}
data.m_nDamageType = iAttachType;
data.m_nAttachmentIndex = iAttachmentPoint;
if ( bResetAllParticlesOnEntity )
{
data.m_fFlags |= PARTICLE_DISPATCH_RESET_PARTICLES;
}
DispatchEffect( "ParticleEffect", data );
}
Note the addition of data.m_vOrigin, that is what the recipient list filter
uses to calculate the PAS recipients and must be initialized even if the
particle effect isn't ultimately going to use it.
Jonathan White
GoldenEye: Source
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