From: Menno Fraters <menno.fraters@outlook.com>
Date: Sat, 25 Jan 2020 02:39:20 +0000 (-0800)
Subject: Fix particle probability density mpi problem
X-Git-Tag: v9.2.0-rc1~606^2~7
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3c3bd8f98deb864c0b1f1f7cd6693d92e46fa044;p=dealii.git

Fix particle probability density mpi problem
---

diff --git a/source/particles/generators.cc b/source/particles/generators.cc
index 1d3713b255..60d1b36f41 100644
--- a/source/particles/generators.cc
+++ b/source/particles/generators.cc
@@ -304,13 +304,16 @@ namespace Particles
           }
 #endif
 
-        // Calculate start id and number of local particles
+        // Calculate start id
         start_particle_id =
           std::llround(static_cast<double>(n_particles_to_create) *
                        local_start_weight / global_weight_integral);
-        n_local_particles =
-          std::llround(static_cast<double>(n_particles_to_create) *
-                       local_weight_integral / global_weight_integral);
+
+        // Calcualate number of local particles
+        const types::particle_index end_particle_id =
+          llround(static_cast<double>(n_particles_to_create) *
+                  local_end_weight / global_weight_integral);
+        n_local_particles = end_particle_id - start_particle_id;
 
         if (random_cell_selection)
           {