// Seed random number generator
void BerconGradient::seedRandomGen(ShadeContext& sc) {
int seed = 1;
if (previewMatIDMode) {
seed = sc.mtlNum;
} else {
if (p_randMat) {
seed += sc.mtlNum;
}
if (p_randObj) {
int hand = (int)sc.Node()->GetHandle();
seed += hand*(hand*hand*15731 + 789221);
}
if (p_randPar) {
Object *ob = sc.GetEvalObject();
if (ob && ob->IsParticleSystem()) {
ParticleObject *obj = (ParticleObject*)ob;
IChkMtlAPI* chkMtlAPI = static_cast<IChkMtlAPI*>(obj->GetInterface(I_NEWMTLINTERFACE));
if ((chkMtlAPI && chkMtlAPI->SupportsParticleIDbyFace())) {
int id = chkMtlAPI->GetParticleFromFace(sc.FaceNumber());
seed += id*(id*id*571 + 789221);
}
}
}
if (p_randTile) {
seed += (int)(sc.UVW(99).z);
}
}
seed *= p_seed;
srand(seed*(seed*seed*15731 + 789221));
}
/******************************************************************************
*! dump particles if desired
*****************************************************************************/
void ParticleTracer::notifyOfDump(int dumptype, int frameNr,char *frameNrStr,string outfilename, double simtime) {
debMsgStd("ParticleTracer::notifyOfDump",DM_MSG,"obj:"<<this->getName()<<" frame:"<<frameNrStr<<" dumpp"<<mDumpParts<<" t"<<simtime, 10); // DEBUG
if(
(dumptype==DUMP_FULLGEOMETRY)&&
(mDumpParts>0)) {
// dump to binary file
std::ostringstream boutfilename("");
boutfilename << outfilename <<"_particles_" << frameNrStr;
if(glob_mpactive) {
if(glob_mpindex>0) { boutfilename << "mp"<<glob_mpindex; }
}
boutfilename << ".gz";
debMsgStd("ParticleTracer::notifyOfDump",DM_MSG,"B-Dumping: "<< this->getName() <<", particles:"<<mParts.size()<<" "<< " to "<<boutfilename.str()<<" #"<<frameNr , 7);
//debMsgStd("ParticleTracer::notifyOfDump",DM_MSG,"B-Dumping: partgeodeb sim:"<<mSimStart<<","<<mSimEnd<<" geosize:"<<mStart<<","<<mEnd,2 );
// output to zipped file
gzFile gzf;
gzf = gzopen(boutfilename.str().c_str(), "wb1");
if(gzf) {
int numParts;
if(sizeof(numParts)!=4) { errMsg("ParticleTracer::notifyOfDump","Invalid int size"); return; }
// only dump active particles
numParts = 0;
for(size_t i=0; i<mParts.size(); i++) {
if(!mParts[i].getActive()) continue;
numParts++;
}
gzwrite(gzf, &numParts, sizeof(numParts));
for(size_t i=0; i<mParts.size(); i++) {
if(!mParts[i].getActive()) { continue; }
ParticleObject *p = &mParts[i];
//int type = p->getType(); // export whole type info
int type = p->getFlags(); // debug export whole type & status info
ntlVec3Gfx pos = p->getPos();
float size = p->getSize();
if(type&PART_FLOAT) { // WARNING same handling for dump!
// add one gridcell offset
//pos[2] += 1.0;
}
// display as drop for now externally
//else if(type&PART_TRACER) { type |= PART_DROP; }
pos = (*mpTrafo) * pos;
ntlVec3Gfx v = p->getVel();
v[0] *= mpTrafo->value[0][0];
v[1] *= mpTrafo->value[1][1];
v[2] *= mpTrafo->value[2][2];
// FIXME check: pos = (*mpTrafo) * pos;
gzwrite(gzf, &type, sizeof(type));
gzwrite(gzf, &size, sizeof(size));
for(int j=0; j<3; j++) { gzwrite(gzf, &pos[j], sizeof(float)); }
for(int j=0; j<3; j++) { gzwrite(gzf, &v[j], sizeof(float)); }
}
gzclose( gzf );
}
} // dump?
}
void gkParticleNode::update(Real tick)
{
if (GET_SOCKET_VALUE(CREATE))
{
gkParticleObject* p = m_scene->createParticleObject(gkUtils::getUniqueName("gkParticleNode"));
p->getParticleProperties().m_settings = GET_SOCKET_VALUE(PARTICLE_SYSTEM_NAME);
p->createInstance();
p->setOrientation(GET_SOCKET_VALUE(ORIENTATION));
p->setPosition(GET_SOCKET_VALUE(POSITION));
m_particles.push_back(new ParticleObject(p));
}
else
{
ParticleObjectIterator iter(m_particles);
while (iter.hasMoreElements())
{
ParticleObject* p = iter.getNext();
if (p->isExpired())
{
m_particles.erase(p);
m_scene->destroyObject(p->m_parObj);
delete p;
//TODO: check iterator validation at erase.
}
}
}
}
void PinMod::ModifyObject(TimeValue t, ModContext &mc, ObjectState *os, INode *node)
{ ParticleObject *obj = GetParticleInterface(os->obj);
if (obj)
{ force.obj=(PinObject*)GetWSMObject(t);
force.node=nodeRef;
force.tmValid.SetEmpty();
force.fValid.SetEmpty();
force.dt=GetTicksPerFrame();
force.dtsq=force.dt*force.dt;
obj->ApplyForceField(&force); //ok
}
}
void SceneBase::InitParticles(int numParticles)
{
m_gravity.Set(0.0f, -9.8f, 0.0f);
ParticleObject* po;
for (int i = 0; i < numParticles; ++i)
{
po = new ParticleObject;
po->SetActive(false);
po->SetMass(1.0f);
m_particleList.push_back(po);
}
}
void WindMod::ModifyObject(
TimeValue t, ModContext &mc, ObjectState *os, INode *node)
{
ParticleObject *obj = GetParticleInterface(os->obj);
if (obj)
{
force.obj = (WindObject*)GetWSMObject(t);
force.node = nodeRef;
force.tmValid.SetEmpty();
force.fValid.SetEmpty();
if (force.obj != NULL)
force.obj->pblock2->GetValue(PB_TYPE,t,force.type,FOREVER);
obj->ApplyForceField(&force);
}
}
ParticleObject * SceneBase::SpawnParticle(float mass, Vector3 vel)
{
for (vector<ParticleObject*>::iterator it = m_particleList.begin(); it != m_particleList.end(); ++it)
{
ParticleObject* po = *it;
if (!po->IsActive())
{
po->Activate(mass, vel);
return po;
}
}
return NULL;
}
void PBombMod::ModifyObject(
TimeValue t, ModContext &mc, ObjectState *os, INode *node)
{
ParticleObject *obj = GetParticleInterface(os->obj);
if (obj) {
/* if (!mc.localdata)
{ mc.localdata=seed; seed+=5;} */
force.obj = (PBombObject*)GetWSMObject(t);
force.node = nodeRef;
force.tmValid.SetEmpty();
force.fValid.SetEmpty();
force.dt=GetTicksPerFrame();
force.dtsq=force.dt*force.dt;
obj->ApplyForceField(&force);
}
}
void EntityDataChannels::addEntity(const ParticleObject &entity) {
entityType->setSlice(_index, entity.entityType());
alive->setSlice(_index, entity.alive());
age->setSlice(_index, entity.age().get());
position->setSlice(_index, entity.position());
color->setSlice(_index, entity.color());
size->setSlice(_index, entity.size());
_index++;
}
/******************************************************************************
* Get triangles for rendering
*****************************************************************************/
void ParticleTracer::getTriangles(double time, vector<ntlTriangle> *triangles,
vector<ntlVec3Gfx> *vertices,
vector<ntlVec3Gfx> *normals, int objectId )
{
#ifdef ELBEEM_PLUGIN
// suppress warnings...
vertices = NULL; triangles = NULL;
normals = NULL; objectId = 0;
time = 0.;
#else // ELBEEM_PLUGIN
int pcnt = 0;
// currently not used in blender
objectId = 0; // remove, deprecated
if(mDumpParts>1) {
return; // only dump, no tri-gen
}
const bool debugParts = false;
int tris = 0;
int segments = mPartSegments;
ntlVec3Gfx scale = ntlVec3Gfx( (mEnd[0]-mStart[0])/(mSimEnd[0]-mSimStart[0]), (mEnd[1]-mStart[1])/(mSimEnd[1]-mSimStart[1]), (mEnd[2]-mStart[2])/(mSimEnd[2]-mSimStart[2]));
ntlVec3Gfx trans = mStart;
time = 0.; // doesnt matter
for(size_t t=0; t<mPrevs.size()+1; t++) {
vector<ParticleObject> *dparts;
if(t==0) {
dparts = &mParts;
} else {
dparts = &mPrevs[t-1];
}
//errMsg("TRAILT","prevs"<<t<<"/"<<mPrevs.size()<<" parts:"<<dparts->size() );
gfxReal partscale = mPartScale;
if(t>1) {
partscale *= (gfxReal)(mPrevs.size()+1-t) / (gfxReal)(mPrevs.size()+1);
}
gfxReal partNormSize = 0.01 * partscale;
//for(size_t i=0; i<mParts.size(); i++) {
for(size_t i=0; i<dparts->size(); i++) {
ParticleObject *p = &( (*dparts)[i] ); // mParts[i];
if(mShowOnly!=10) {
// 10=show only deleted
if( p->getActive()==false ) continue;
} else {
if( p->getActive()==true ) continue;
}
int type = p->getType();
if(mShowOnly>0) {
switch(mShowOnly) {
case 1: if(!(type&PART_BUBBLE)) continue; break;
case 2: if(!(type&PART_DROP)) continue; break;
case 3: if(!(type&PART_INTER)) continue; break;
case 4: if(!(type&PART_FLOAT)) continue; break;
case 5: if(!(type&PART_TRACER)) continue; break;
}
} else {
// by default dont display inter
if(type&PART_INTER) continue;
}
pcnt++;
ntlVec3Gfx pnew = p->getPos();
if(type&PART_FLOAT) { // WARNING same handling for dump!
if(p->getStatus()&PART_IN) { pnew[2] += 0.8; } // offset for display
// add one gridcell offset
//pnew[2] += 1.0;
}
#if LBMDIM==2
pnew[2] += 0.001; // DEBUG
pnew[2] += 0.009; // DEBUG
#endif
ntlVec3Gfx pdir = p->getVel();
gfxReal plen = normalize( pdir );
if( plen < 1e-05) pdir = ntlVec3Gfx(-1.0 ,0.0 ,0.0);
ntlVec3Gfx pos = (*mpTrafo) * pnew;
gfxReal partsize = 0.0;
if(debugParts) errMsg("DebugParts"," i"<<i<<" new"<<pnew<<" vel"<<pdir<<" pos="<<pos );
//if(i==0 &&(debugParts)) errMsg("DebugParts"," i"<<i<<" new"<<pnew[0]<<" pos="<<pos[0]<<" scale="<<scale[0]<<" t="<<trans[0] );
// value length scaling?
if(mValueScale==1) {
partsize = partscale * plen;
} else if(mValueScale==2) {
// cut off scaling
if(plen > mValueCutoffTop) continue;
if(plen < mValueCutoffBottom) continue;
partsize = partscale * plen;
} else {
partsize = partscale; // no length scaling
}
//if(type&(PART_DROP|PART_BUBBLE))
partsize *= p->getSize()/5.0;
ntlVec3Gfx pstart( mPartHeadDist *partsize, 0.0, 0.0 );
ntlVec3Gfx pend ( mPartTailDist *partsize, 0.0, 0.0 );
gfxReal phi = 0.0;
gfxReal phiD = 2.0*M_PI / (gfxReal)segments;
ntlMat4Gfx cvmat;
cvmat.initId();
pdir *= -1.0;
ntlVec3Gfx cv1 = pdir;
ntlVec3Gfx cv2 = ntlVec3Gfx(pdir[1], -pdir[0], 0.0);
ntlVec3Gfx cv3 = cross( cv1, cv2);
//? for(int l=0; l<3; l++) { cvmat.value[l][0] = cv1[l]; cvmat.value[l][1] = cv2[l]; cvmat.value[l][2] = cv3[l]; }
pstart = (cvmat * pstart);
pend = (cvmat * pend);
for(int s=0; s<segments; s++) {
ntlVec3Gfx p1( 0.0 );
ntlVec3Gfx p2( 0.0 );
gfxReal radscale = partNormSize;
radscale = (partsize+partNormSize)*0.5;
p1[1] += cos(phi) * radscale;
p1[2] += sin(phi) * radscale;
p2[1] += cos(phi + phiD) * radscale;
p2[2] += sin(phi + phiD) * radscale;
ntlVec3Gfx n1 = ntlVec3Gfx( 0.0, cos(phi), sin(phi) );
ntlVec3Gfx n2 = ntlVec3Gfx( 0.0, cos(phi + phiD), sin(phi + phiD) );
ntlVec3Gfx ns = n1*0.5 + n2*0.5;
p1 = (cvmat * p1);
p2 = (cvmat * p2);
sceneAddTriangle( pos+pstart, pos+p1, pos+p2,
ns,n1,n2, ntlVec3Gfx(0.0), 1, triangles,vertices,normals );
sceneAddTriangle( pos+pend , pos+p2, pos+p1,
ns,n2,n1, ntlVec3Gfx(0.0), 1, triangles,vertices,normals );
phi += phiD;
tris += 2;
}
}
} // t
debMsgStd("ParticleTracer::getTriangles",DM_MSG,"Dumped "<<pcnt<<"/"<<mParts.size()<<" parts, tris:"<<tris<<", showonly:"<<mShowOnly,10);
return; // DEBUG
#endif // ELBEEM_PLUGIN
}
void ParticleTracer::checkDumpTextPositions(double simtime) {
// dfor partial & full dump
if(mDumpTextInterval>0.) {
debMsgStd("ParticleTracer::checkDumpTextPositions",DM_MSG,"t="<<simtime<<" last:"<<mDumpTextLastTime<<" inter:"<<mDumpTextInterval,7);
}
if((mDumpTextInterval>0.) && (simtime>mDumpTextLastTime+mDumpTextInterval)) {
// dump to binary file
std::ostringstream boutfilename("");
if(mDumpTextFile.length()>1) {
boutfilename << mDumpTextFile << ".cpart2";
} else {
boutfilename << "_particles" << ".cpart2";
}
debMsgStd("ParticleTracer::checkDumpTextPositions",DM_MSG,"T-Dumping: "<< this->getName() <<", particles:"<<mParts.size()<<" "<< " to "<<boutfilename.str()<<" " , 7);
int numParts = 0;
// only dump bubble particles
for(size_t i=0; i<mParts.size(); i++) {
//if(!mParts[i].getActive()) continue;
//if(!(mParts[i].getType()&PART_BUBBLE)) continue;
numParts++;
}
// output to text file
//gzFile gzf;
FILE *stf;
if(mDumpTextCount==0) {
//gzf = gzopen(boutfilename.str().c_str(), "w0");
stf = fopen(boutfilename.str().c_str(), "w");
fprintf( stf, "\n\n# cparts generated by elbeem \n# no. of parts \nN %d \n\n",numParts);
// fixed time scale for now
fprintf( stf, "T %f \n\n", 1.0);
} else {
//gzf = gzopen(boutfilename.str().c_str(), "a+0");
stf = fopen(boutfilename.str().c_str(), "a+");
}
// add current set
if(stf) {
fprintf( stf, "\n\n# new set at frame %d,t%f,p%d --------------------------------- \n\n", mDumpTextCount, simtime, numParts );
fprintf( stf, "S %f \n\n", simtime );
for(size_t i=0; i<mParts.size(); i++) {
ParticleObject *p = &mParts[i];
ntlVec3Gfx pos = p->getPos();
float size = p->getSize();
float infl = 1.;
//if(!mParts[i].getActive()) { size=0.; } // switch "off"
if(!mParts[i].getActive()) { infl=0.; } // switch "off"
if(!mParts[i].getInFluid()) { infl=0.; } // switch "off"
if(mParts[i].getLifeTime()<0.) { infl=0.; } // not yet active...
pos = (*mpTrafo) * pos;
ntlVec3Gfx v = p->getVel();
v[0] *= mpTrafo->value[0][0];
v[1] *= mpTrafo->value[1][1];
v[2] *= mpTrafo->value[2][2];
fprintf( stf, "P %f %f %f \n", pos[0],pos[1],pos[2] );
if(size!=1.0) fprintf( stf, "s %f \n", size );
if(infl!=1.0) fprintf( stf, "i %f \n", infl );
fprintf( stf, "\n" );
}
fprintf( stf, "# %d end ", mDumpTextCount );
//gzclose( gzf );
fclose( stf );
mDumpTextCount++;
}
mDumpTextLastTime += mDumpTextInterval;
}
}
// 工厂对象的创建方法
ISceneObject *ParticleObjectFactory::create(const String &name , IScene *scene , const NameValuePairList* params)
{
ParticleObject *obj = new ParticleObject(name);
obj->create(scene , params);
return obj;
}
// Calculates 0..1 value which is given to the gradient
float BerconGradient::getGradientValue(ShadeContext& sc) {
switch (p_type) {
case 0: { // UVW
break; // Handled in main evaluation
}
case 1: { // Normal
switch (p_normalFunction) {
case 0: { // Perpendicular / Parallel
return fabs(getGradientValueNormal(sc));
}
case 1: { // Towards / Away
return (getGradientValueNormal(sc) + 1.f) / 2.f;
}
case 2: { // Fresnel
// NOTE: Should this get IOR from sc.GetIOR()?
// I think not since its just a map, not material.
// You get more predictable behaviour with constant 1.f.
static float n1 = 1.0f;
float cti = fabs(getGradientValueNormal(sc));
float stt = (n1 / p_ior) * sqrt(1 - cti * cti);
float ctt = sqrt(1 - stt * stt);
float rs = (p_ior * ctt - n1 * cti ) / (p_ior * ctt + n1 * cti);
rs = rs * rs;
float rp = (n1 * ctt - p_ior * cti ) / (n1 * ctt + p_ior * cti);
rp = rp * rp;
return 1.f - 0.5f * (rs + rp);
}
}
}
case 2: { // Distance
return getGradientValueDist(sc);
}
case 3: { // Light
return Intens(sc.DiffuseIllum());
}
case 4: { // Map
return p_maptex?p_maptex->EvalMono(sc):0.f; // TODO: Evaluate submaps color, bump is tougher DELTA shift with BerconSC?
}
case 5: { // Random
seedRandomGen(sc);
return (float)sfrand();
break;
}
case 6: { // Particle age
Object *ob = sc.GetEvalObject();
if (ob && ob->IsParticleSystem()) {
ParticleObject *obj = (ParticleObject*)ob;
TimeValue t = sc.CurTime();
TimeValue age = obj->ParticleAge(t,sc.mtlNum);
TimeValue life = obj->ParticleLife(t,sc.mtlNum);
if (age>=0 && life>=0)
return float(age)/float(life);
}
break;
}
case 7: { // Particle speed
Object *ob = sc.GetEvalObject();
if (ob && ob->IsParticleSystem()) {
ParticleObject *obj = (ParticleObject*)ob;
/*IChkMtlAPI* chkMtlAPI = static_cast<IChkMtlAPI*>(obj->GetInterface(I_NEWMTLINTERFACE));
if ((chkMtlAPI&&chkMtlAPI->SupportsParticleIDbyFace()))
return (Length(obj->ParticleVelocity(sc.CurTime(),chkMtlAPI->GetParticleFromFace(sc.FaceNumber()))) - p_rangeMin) / (p_rangeMax - p_rangeMin);
else*/
return Length(obj->ParticleVelocity(sc.CurTime(),sc.mtlNum));
}
break;
}
case 8: { // Particle size
Object *ob = sc.GetEvalObject();
if (ob && ob->IsParticleSystem()) {
ParticleObject *obj = (ParticleObject*)ob;
return obj->ParticleSize(sc.CurTime(),sc.mtlNum);
}
break;
}
default:
break;
}
return 0.f;
}