From 4a6f715421af0d6cc15dc9e7ab6f3f90438d0a3d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Sebasti=C3=A1n=20Barschkis?= Date: Wed, 8 Apr 2020 18:29:11 +0200 Subject: Fix T73552: Mantaflow - liquid particles show up in organized unrealistic structure Issue was being caused by a particle offset which was random but the same for every particle. --- extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp') diff --git a/extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp b/extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp index 23f5e23d99d..a8913a218c1 100644 --- a/extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp +++ b/extern/mantaflow/preprocessed/plugin/secondaryparticles.cpp @@ -525,7 +525,7 @@ struct knFlipSampleSecondaryParticlesMoreCylinders : public KernelBase { if (!(flags(i, j, k) & itype)) return; - RandomStream mRand(9832); + 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) { @@ -791,11 +791,9 @@ struct knFlipSampleSecondaryParticles : public KernelBase { const int n = KE * (k_ta * TA + k_wc * WC) * dt; // number of secondary particles if (n == 0) return; - RandomStream mRand(9832); + static RandomStream mRand(9832); - Vec3 xi = Vec3(i + mRand.getReal(), - j + mRand.getReal(), - k + mRand.getReal()); // randomized offset uniform in cell + Vec3 xi = Vec3(i, j, k) + mRand.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 -- cgit v1.2.3