struct SMFXRunTimeEffectParams {
  const int MAX_SOUND_PARAMS = 4;
  uint16 inWater : 1;
  uint16 inZeroG : 1;
  uint16 playSoundFP : 1;
  uint16 soundNoObstruction : 1;
  uint16 padding : 12;
  uint16 playflags;
  float fLastTime;
  float fDecalPlacementTestMaxSize;
  EntityId src;
  EntityId trg;
  int srcSurfaceId;
  int trgSurfaceId;
  IRenderNode* srcRenderNode;
  IRenderNode* trgRenderNode;
  int partID;
  Vec3 pos;
  Vec3 decalPos;
  Vec3 dir[2];
  Vec3 normal;
  float angle;
  float scale;
  SMFXParticleEffectParams particleParams;
  EntityId audioProxyEntityId;
  Vec3 audioProxyOffset;
  float soundDistanceMult;
  float soundScale;
  int numSoundParams;
  SMFXSoundEffectParam soundParams[MAX_SOUND_PARAMS];
};

IMaterialEffects.h

float angle;

EntityId audioProxyEntityId;

if set, uses this Entity's audio proxy to execute audio triggers. otherwise creates independent sound

Vec3 audioProxyOffset;

in case of audio proxy, uses this offset

Vec3 decalPos;

Vec3 dir[2];

float fDecalPlacementTestMaxSize;

float fLastTime;

last time this effect was played

uint16 inWater : 1;

effect medium in in water

uint16 inZeroG : 1;

effect medium is in zeroG

const int MAX_SOUND_PARAMS = 4;

Vec3 normal;

int numSoundParams;

uint16 padding : 12;

SMFXParticleEffectParams particleParams;

particle related

int partID;

uint16 playflags;

see EMFXPlayFlags

uint16 playSoundFP : 1;

play sound as 2D (temp until Tomas fixes!), appends "_fp" to soundname

Vec3 pos;

float scale;

float soundDistanceMult;

uint16 soundNoObstruction : 1;

don't use obstruction on sound

SMFXSoundEffectParam soundParams[MAX_SOUND_PARAMS];

float soundScale;

EntityId src;

IRenderNode* srcRenderNode;

int srcSurfaceId;

EntityId trg;

IRenderNode* trgRenderNode;

int trgSurfaceId;

bool AddSoundParam(const char* name, float val);

void ResetSoundParams();

SMFXRunTimeEffectParams();