nominal fixes for ray trace plots with dagmc

Author: gridley

openmc/plots.py

@@ -1097,7 +1097,7 @@ def _check_domains_consistent_with_color_by(self, domains):
                                     'color_by=material')
             else:
                 if not isinstance(region, openmc.Cell):
-                    raise Exception('Domain list must be materials if '
+                    raise Exception('Domain list must be cells if '
                                     'color_by=cell')
 
     def to_xml_element(self):

src/dagmc.cpp

@@ -764,8 +764,7 @@ Direction DAGSurface::reflect(Position r, Direction u, GeometryState* p) const
   double dir[3];
   rval = dagmc_ptr_->get_angle(surf, pnt, dir, &p->history());
   MB_CHK_ERR_CONT(rval);
-  p->last_dir() = u.reflect(dir);
-  return p->last_dir();
+  return u.reflect(dir);
 }
 
 //==============================================================================

src/plot.cpp

@@ -1621,18 +1621,7 @@ void Ray::trace()
       return;
     }
 
-    if (i_surface_ > 0 &&
-        model::surfaces[i_surface_]->geom_type_ == GeometryType::DAG) {
-#ifdef DAGMC
-      int32_t i_cell = next_cell(
-        i_surface_, cell_last(n_coord() - 1), lowest_coord().universe);
-      inside_cell = i_cell >= 0;
-#else
-      fatal_error("Not compiled for DAGMC, but somehow you have a DAGCell!");
-#endif
-    } else {
-      inside_cell = exhaustive_find_cell(*this, settings::verbosity >= 10);
-    }
+    inside_cell = exhaustive_find_cell(*this, settings::verbosity >= 10);
 
     if (inside_cell) {
 
@@ -1750,7 +1739,10 @@ void PhongRay::on_intersection()
       return;
     }
 
-    Direction normal = model::surfaces.at(i_surface())->normal(r_local());
+    // Get surface pointer
+    const auto& surf = model::surfaces.at(i_surface());
+
+    Direction normal = surf->normal(r_local());
     normal /= normal.norm();
 
     // Need to apply translations to find the normal vector in
@@ -1762,7 +1754,7 @@ void PhongRay::on_intersection()
       }
     }
 
-    if (surface() > 0) {
+    if (surf->geom_type_ != GeometryType::DAG && surface() > 0) {
       normal *= -1.0;
     }