diff options
Diffstat (limited to 'extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp')
| -rw-r--r-- | extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp | 65 |
1 files changed, 44 insertions, 21 deletions
diff --git a/extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp b/extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp index 82afe2d7ab2..8ebc239e8fc 100644 --- a/extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp +++ b/extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp @@ -479,7 +479,8 @@ struct knFlipSampleSecondaryParticlesMoreCylinders : public KernelBase { const Real k_ta, const Real k_wc, const Real dt, - const int itype = FlagGrid::TypeFluid) + const int itype, + RandomStream &rand) : KernelBase(&flags, 0), flags(flags), v(v), @@ -497,7 +498,8 @@ struct knFlipSampleSecondaryParticlesMoreCylinders : public KernelBase { k_ta(k_ta), k_wc(k_wc), dt(dt), - itype(itype) + itype(itype), + rand(rand) { runMessage(); run(); @@ -521,13 +523,13 @@ struct knFlipSampleSecondaryParticlesMoreCylinders : public KernelBase { const Real k_ta, const Real k_wc, const Real dt, - const int itype = FlagGrid::TypeFluid) + const int itype, + RandomStream &rand) { if (!(flags(i, j, k) & itype)) return; - static RandomStream mRand(9832); Real radius = 0.25; // diameter=0.5 => sampling with two cylinders in each dimension since cell size=1 for (Real x = i - radius; x <= i + radius; x += 2 * radius) { @@ -549,9 +551,9 @@ struct knFlipSampleSecondaryParticlesMoreCylinders : public KernelBase { cross(e1, dir)); // perpendicular to dir and e1, so e1 and e1 create reference plane for (int di = 0; di < n; di++) { - const Real r = radius * sqrt(mRand.getReal()); // distance to cylinder axis - const Real theta = mRand.getReal() * Real(2) * M_PI; // azimuth - const Real h = mRand.getReal() * norm(dt * vi); // distance to reference plane + const Real r = radius * sqrt(rand.getReal()); // distance to cylinder axis + const Real theta = rand.getReal() * Real(2) * M_PI; // azimuth + const Real h = rand.getReal() * norm(dt * vi); // distance to reference plane Vec3 xd = xi + r * cos(theta) * e1 + r * sin(theta) * e2 + h * getNormalized(vi); if (!flags.is3D()) xd.z = 0; @@ -561,7 +563,7 @@ struct knFlipSampleSecondaryParticlesMoreCylinders : public KernelBase { vi; // init velocity of new particle Real temp = (KE + TA + WC) / 3; l_sec[l_sec.size() - 1] = ((lMax - lMin) * temp) + lMin + - mRand.getReal() * 0.1; // init lifetime of new particle + rand.getReal() * 0.1; // init lifetime of new particle // init type of new particle if (neighborRatio(i, j, k) < c_s) { @@ -663,6 +665,11 @@ struct knFlipSampleSecondaryParticlesMoreCylinders : public KernelBase { return itype; } typedef int type16; + inline RandomStream &getArg17() + { + return rand; + } + typedef RandomStream type17; void runMessage() { debMsg("Executing kernel knFlipSampleSecondaryParticlesMoreCylinders ", 3); @@ -696,7 +703,8 @@ struct knFlipSampleSecondaryParticlesMoreCylinders : public KernelBase { k_ta, k_wc, dt, - itype); + itype, + rand); } const FlagGrid &flags; const MACGrid &v; @@ -715,6 +723,7 @@ struct knFlipSampleSecondaryParticlesMoreCylinders : public KernelBase { const Real k_wc; const Real dt; const int itype; + RandomStream &rand; }; // adds secondary particles to &pts_sec for every fluid cell in &flags according to the potential @@ -738,7 +747,8 @@ struct knFlipSampleSecondaryParticles : public KernelBase { const Real k_ta, const Real k_wc, const Real dt, - const int itype = FlagGrid::TypeFluid) + const int itype, + RandomStream &rand) : KernelBase(&flags, 0), flags(flags), v(v), @@ -756,7 +766,8 @@ struct knFlipSampleSecondaryParticles : public KernelBase { k_ta(k_ta), k_wc(k_wc), dt(dt), - itype(itype) + itype(itype), + rand(rand) { runMessage(); run(); @@ -780,7 +791,8 @@ struct knFlipSampleSecondaryParticles : public KernelBase { const Real k_ta, const Real k_wc, const Real dt, - const int itype = FlagGrid::TypeFluid) + const int itype, + RandomStream &rand) { if (!(flags(i, j, k) & itype)) @@ -793,9 +805,8 @@ struct knFlipSampleSecondaryParticles : public KernelBase { const int n = KE * (k_ta * TA + k_wc * WC) * dt; // number of secondary particles if (n == 0) return; - static RandomStream mRand(9832); - Vec3 xi = Vec3(i, j, k) + mRand.getVec3(); // randomized offset uniform in cell + Vec3 xi = Vec3(i, j, k) + rand.getVec3(); // randomized offset uniform in cell Vec3 vi = v.getInterpolated(xi); Vec3 dir = dt * vi; // direction of movement of current particle Vec3 e1 = getNormalized(Vec3(dir.z, 0, -dir.x)); // perpendicular to dir @@ -803,9 +814,9 @@ struct knFlipSampleSecondaryParticles : public KernelBase { cross(e1, dir)); // perpendicular to dir and e1, so e1 and e1 create reference plane for (int di = 0; di < n; di++) { - const Real r = Real(0.5) * sqrt(mRand.getReal()); // distance to cylinder axis - const Real theta = mRand.getReal() * Real(2) * M_PI; // azimuth - const Real h = mRand.getReal() * norm(dt * vi); // distance to reference plane + const Real r = Real(0.5) * sqrt(rand.getReal()); // distance to cylinder axis + const Real theta = rand.getReal() * Real(2) * M_PI; // azimuth + const Real h = rand.getReal() * norm(dt * vi); // distance to reference plane Vec3 xd = xi + r * cos(theta) * e1 + r * sin(theta) * e2 + h * getNormalized(vi); if (!flags.is3D()) xd.z = 0; @@ -815,7 +826,7 @@ struct knFlipSampleSecondaryParticles : public KernelBase { vi; // init velocity of new particle Real temp = (KE + TA + WC) / 3; l_sec[l_sec.size() - 1] = ((lMax - lMin) * temp) + lMin + - mRand.getReal() * 0.1; // init lifetime of new particle + rand.getReal() * 0.1; // init lifetime of new particle // init type of new particle if (neighborRatio(i, j, k) < c_s) { @@ -914,6 +925,11 @@ struct knFlipSampleSecondaryParticles : public KernelBase { return itype; } typedef int type16; + inline RandomStream &getArg17() + { + return rand; + } + typedef RandomStream type17; void runMessage() { debMsg("Executing kernel knFlipSampleSecondaryParticles ", 3); @@ -947,7 +963,8 @@ struct knFlipSampleSecondaryParticles : public KernelBase { k_ta, k_wc, dt, - itype); + itype, + rand); } const FlagGrid &flags; const MACGrid &v; @@ -966,6 +983,7 @@ struct knFlipSampleSecondaryParticles : public KernelBase { const Real k_wc; const Real dt; const int itype; + RandomStream &rand; }; void flipSampleSecondaryParticles(const std::string mode, @@ -992,6 +1010,9 @@ void flipSampleSecondaryParticles(const std::string mode, if (dt <= 0) timestep = flags.getParent()->getDt(); + /* Every particle needs to get a different random offset. */ + RandomStream rand(pts_sec.getSeed()); + if (mode == "single") { knFlipSampleSecondaryParticles(flags, v, @@ -1009,7 +1030,8 @@ void flipSampleSecondaryParticles(const std::string mode, k_ta, k_wc, timestep, - itype); + itype, + rand); } else if (mode == "multiple") { knFlipSampleSecondaryParticlesMoreCylinders(flags, @@ -1028,7 +1050,8 @@ void flipSampleSecondaryParticles(const std::string mode, k_ta, k_wc, timestep, - itype); + itype, + rand); } else { throw std::invalid_argument("Unknown mode: use \"single\" or \"multiple\" instead!"); |