diff options
Diffstat (limited to 'src/simulation/Simulation.cpp')
| -rw-r--r-- | src/simulation/Simulation.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/simulation/Simulation.cpp b/src/simulation/Simulation.cpp index acc6671..c4e6fbb 100644 --- a/src/simulation/Simulation.cpp +++ b/src/simulation/Simulation.cpp @@ -2016,7 +2016,7 @@ int Simulation::try_move(int i, int x, int y, int nx, int ny) if (parts[i].type==PT_NEUT) { // target material is NEUTPENETRATE, meaning it gets moved around when neutron passes unsigned s = pmap[y][x]; - if (!(elements[s&0xFF].Properties&PROP_NEUTPENETRATE)) + if (s && !(elements[s&0xFF].Properties&PROP_NEUTPENETRATE)) return 1; // if the element currently underneath neutron isn't NEUTPENETRATE, don't move anything except the neutron // if nothing is currently underneath neutron, only move target particle if (s) |