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SIM_PBSolverFLDivergenceProject.cpp
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SIM_PBSolverFLDivergenceProject.cpp
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/////////////////////////////////////////////////////
// ++-FLUID : DIVERGENCE PROJECT SOLVER
#include "include.h"
#include "SIM_Pebble.h"
#include "SIM_PBBoundaryCondition.h"
#include "SIM_PBSolverFLDivergenceProject.h"
const SIM_DopDescription * SIM_PBSolverFLDivergenceProject::getDopDescription()
{
static PRM_Template theTemplates[] = {
PRM_Template(PRM_TOGGLE_J, 1, &theActivateName, PRMoneDefaults),
PRM_Template(PRM_INT_J, 1, &theIterationsName, PRM20Defaults),
//PRM_Template(PRM_STRING, 1, &theChannelsName, &theChannelsDef),
PRM_Template(PRM_ALPHASTRING, 1, &theDataNameName, &theDataNameDef),
PRM_Template() };
static SIM_DopDescription theDopDescription(true, "sim_pb_fl_divproj", "PebbleFL Divergence Projection", "PBSolver_FLDivproj", classname(), theTemplates);
return &theDopDescription;
};
// ++-
SIM_Solver::SIM_Result SIM_PBSolverFLDivergenceProject::solveSingleObjectSubclass(SIM_Engine & engine, SIM_Object & object, SIM_ObjectArray & feedbacktoobjects, const SIM_Time & timestep, bool newobject)
{
//bool activate = (getActivate() != 0);
//if (!activate) return SIM_SOLVER_SUCCESS;
UT_String dn = "";
getDataName(dn);
SIM_Data* isPebble = SIM_DATA_GET(object, "IsPebble", SIM_Data);
if (isPebble == NULL) return SIM_SOLVER_SUCCESS;
//UT_String chanStr;
//chanStr = getChannels();
//m_channels.clear();
//chanStr.tokenize(m_channels, " ");
m_pebble = SIM_DATA_GET(object, dn, SIM_Pebble);
if (m_pebble == NULL) return SIM_SOLVER_FAIL;
for (Patch* _pb : m_pebble->m_P) if (_pb == NULL) return SIM_SOLVER_FAIL;
// BOUNDARIES
m_bcs.clear();
SIM_DataArray subd;
this->filterSubData(subd, NULL, SIM_DataFilterByType("SIM_PBBoundaryCondition"), NULL, SIM_DataFilterNone());
for (int i = 0; i < subd.entries(); i++)
{
SIM_Data* dt = subd[i];
SIM_PBBoundaryCondition* bcd = dynamic_cast<SIM_PBBoundaryCondition*>(dt);
if (bcd != NULL) m_bcs.push_back(bcd);
};
// PREPARE
m_iterations = getIterations();
declareEntity(m_pebble->m_P, "_proxy_v");
solve();
//UT_StringArray pxs;
//pxs.append("_proxy_v");
//vector<Page*> PVS(m_pebble->m_P.size());
//// FOR EACH PEBBLE
//for (Patch* _pb : m_pebble->m_P)
//{
// if (UTgetInterrupt()->opInterrupt()) break;
// Patch& pb = *_pb;
// //delete _G;
//};
// APPLY & CLEANUP
applyProxy(m_pebble->m_P, "v");
m_pebble->pubHandleModification();
return SIM_SOLVER_SUCCESS;
};
void SIM_PBSolverFLDivergenceProject::solvePartial(const UT_JobInfo & info)
{
int start, end;
info.divideWork(m_pebble->m_P.size(), start, end);
for (int id = start; id < end; id++)
{
if (UTgetInterrupt()->opInterrupt()) break;
Patch& pb = *m_pebble->m_P[id];
//pb.declarePage("_proxy_v");
float dx = 1.0 / (pb.dim[0] - 1);
float dy = 1.0 / (pb.dim[1] - 1);
Page* _du = getExpandedPrimVar(m_pebble->m_P, pb, "dPdu");
Page& dPdu = *_du;
Page* _dv = getExpandedPrimVar(m_pebble->m_P, pb, "dPdv");
Page& dPdv = *_dv;
//Page* _n = getExpandedPrimVar(PEBBLE, pb, "N");
//Page& N = *_n;
Page* _v = getExpandedPrimVar(m_pebble->m_P, pb, "v");
Page& V = *_v;
//Page* _G = getExpandedPrimVar(PEBBLE, pb, "G");
//Page& G = *_G;
// PREPARE DIV PAGE
Page DIV(pb.dim[0] + 2, pb.dim[0] + 2);
for (int I = 0; I < pb.dim[0] + 2; I++)
{
for (int J = 0; J < pb.dim[1] + 2; J++)
{
float div = 0;
// X
int I0 = max(I - 1, 0);
int I1 = min(I + 1, pb.dim[0] + 1);
{
UT_Vector3 dPdu0 = dPdu.get(I0, J); dPdu0.normalize();
UT_Vector3 dPdu1 = dPdu.get(I1, J); dPdu1.normalize();
UT_Vector3 dPdv0 = dPdv.get(I0, J); dPdv0.makeOrthonormal(dPdu0); dPdv0.normalize();
UT_Vector3 dPdv1 = dPdv.get(I1, J); dPdv1.makeOrthonormal(dPdu1); dPdv1.normalize();
UT_Vector3 N0 = dPdu0; N0.cross(dPdv0); N0.normalize();
UT_Vector3 N1 = dPdu1; N1.cross(dPdv1); N1.normalize();
UT_Vector3 V0 = V.get(I0, J); V0 -= N0*V0.dot(N0);
UT_Vector3 V1 = V.get(I1, J); V1 -= N1*V1.dot(N0);
div += dx*(V1.dot(dPdu1) - V0.dot(dPdu0));
};
// Y
int J0 = max(J - 1, 0);
int J1 = min(J + 1, pb.dim[1] + 1);
{
UT_Vector3 dPdu0 = dPdu.get(I, J0); dPdu0.normalize();
UT_Vector3 dPdu1 = dPdu.get(I, J1); dPdu1.normalize();
UT_Vector3 dPdv0 = dPdv.get(I, J0); dPdv0.makeOrthonormal(dPdu0); dPdv0.normalize();
UT_Vector3 dPdv1 = dPdv.get(I, J1); dPdv1.makeOrthonormal(dPdu1); dPdv1.normalize();
UT_Vector3 N0 = dPdu0; N0.cross(dPdv0); N0.normalize();
UT_Vector3 N1 = dPdu1; N1.cross(dPdv1); N1.normalize();
UT_Vector3 V0 = V.get(I, J0); V0 -= N0*V0.dot(N0);
UT_Vector3 V1 = V.get(I, J1); V1 -= N1*V1.dot(N0);
div += dy*(V1.dot(dPdv1) - V0.dot(dPdv0));
}
div *= -0.5;
DIV.get(I, J) = UT_Vector3(div, 0, 0);
};
};
// RELAXING ITERATIONS
for (int k = 0; k < m_iterations; k++)
{
// EACH SAMPLE - COMPUTE
for (int I = 0; I < pb.dim[0] + 2; I++)
{
for (int J = 0; J < pb.dim[1] + 2; J++)
{
// COMPUTE RELAXATION
UT_Vector3 D = DIV.get(I, J);
int I0 = max(I - 1, 0);
int I1 = min(I + 1, pb.dim[0] + 1);
int J0 = max(J - 1, 0);
int J1 = min(J + 1, pb.dim[1] + 1);
float RES = D[0];
RES += DIV.get(I0, J)[1] + DIV.get(I1, J)[1] + DIV.get(I, J0)[1] + DIV.get(I, J1)[1];
RES /= 4;
DIV.get(I, J)[2] = RES;
};
};
// ...APPLY RELAXING BC!?
// EACH SAMPLE - SWAP
for (int I = 0; I < pb.dim[0] + 2; I++)
{
for (int J = 0; J < pb.dim[1] + 2; J++)
{
UT_Vector3 V = DIV.get(I, J);
DIV.get(I, J) = UT_Vector3(V[0], V[2], V[1]);
};
};
};
// PROJECTION
for (int I = 1; I < pb.dim[0] + 1; I++)
{
for (int J = 1; J < pb.dim[1] + 1; J++)
{
UT_Vector3 _dPdu = dPdu.get(I, J); _dPdu.normalize();
UT_Vector3 _dPdv = dPdv.get(I, J); _dPdv.makeOrthonormal(_dPdu); _dPdv.normalize();
UT_Vector3 N = _dPdu; N.cross(_dPdv); N.normalize();
UT_Vector3 v = V.get(I, J); v -= N*v.dot(N);
float vu = v.dot(_dPdu) - 0.5*(DIV.get(I + 1, J)[1] - DIV.get(I - 1, J)[1]) / dx;
float vv = v.dot(_dPdv) - 0.5*(DIV.get(I, J + 1)[1] - DIV.get(I, J - 1)[1]) / dy;
V.get(I, J) = vu*_dPdu + vv*_dPdv;
};
};
// APPLY
for (SIM_PBBoundaryCondition* BC : m_bcs) BC->applyBoundaryConditions(*m_pebble, pb, "v", V);
Page& VV = pb.getPrimVar("_proxy_v");
VV.apply(V, 1, 1);
delete _du; delete _dv;
delete _v;
};
};