1 files changed, 14 insertions, 8 deletions
diff --git a/Source/Particles/MultiParticleContainer.H b/Source/Particles/MultiParticleContainer.H
index d7ddc7a72..9db129b05 100644
--- a/Source/Particles/MultiParticleContainer.H
+++ b/Source/Particles/MultiParticleContainer.H
@@ -23,14 +23,20 @@
 #include <string>
 #include <algorithm>
 
-//
-// MultiParticleContainer holds multiple (nspecies or npsecies+1 when
-// using laser) WarpXParticleContainer.  WarpXParticleContainer is
-// derived from amrex::ParticleContainer, and it is
-// polymorphic. PhysicalParticleContainer and LaserParticleContainer are
-// concrete class derived from WarpXParticlContainer.
-//
-
+/**
+ * The class MultiParticleContainer holds multiple instances of the polymorphic
+ * class WarpXParticleContainer, stored in its member variable "allcontainers".
+ * The class WarpX typically has a single (pointer to an) instance of
+ * MultiParticleContainer.
+ *
+ * MultiParticleContainer typically has two types of functions:
+ * - Functions that loop over all instances of WarpXParticleContainer in
+ *   allcontainers and calls the corresponding function (for instance,
+ *   MultiParticleContainer::Evolve loops over all particles containers and
+ *   calls the corresponding WarpXParticleContainer::Evolve function).
+ * - Functions that specifically handle multiple species (for instance
+ *   ReadParameters or mapSpeciesProduct).
+ */
 class MultiParticleContainer
 {