Fix T81893: Cycles viewport crash changing mesh to smoke domain

Now that volume is a dedicated geometry type in Cycles, we need to re-allocate
the geometry when a mesh changes into a volume.

2 files changed, 5 insertions, 4 deletions

diff --git a/intern/cycles/blender/blender_geometry.cpp b/intern/cycles/blender/blender_geometry.cpp
index 002f5e0fdb7..a665bd97a8d 100644
--- a/intern/cycles/blender/blender_geometry.cpp
+++ b/intern/cycles/blender/blender_geometry.cpp
@@ -50,11 +50,11 @@ Geometry *BlenderSync::sync_geometry(BL::Depsgraph &b_depsgraph,
   /* Test if we can instance or if the object is modified. */
   BL::ID b_ob_data = b_ob.data();
   BL::ID b_key_id = (BKE_object_is_modified(b_ob)) ? b_ob_instance : b_ob_data;
-  GeometryKey key(b_key_id.ptr.data, use_particle_hair);
   BL::Material material_override = view_layer.material_override;
   Shader *default_shader = (b_ob.type() == BL::Object::type_VOLUME) ? scene->default_volume :
                                                                       scene->default_surface;
   Geometry::Type geom_type = determine_geom_type(b_ob, use_particle_hair);
+  GeometryKey key(b_key_id.ptr.data, geom_type);
 
   /* Find shader indices. */
   vector<Shader *> used_shaders;
diff --git a/intern/cycles/blender/blender_id_map.h b/intern/cycles/blender/blender_id_map.h
index f9f201c2e4e..8ce1d23665d 100644
--- a/intern/cycles/blender/blender_id_map.h
+++ b/intern/cycles/blender/blender_id_map.h
@@ -19,6 +19,7 @@
 
 #include <string.h>
 
+#include "render/geometry.h"
 #include "render/scene.h"
 
 #include "util/util_map.h"
@@ -230,9 +231,9 @@ struct ObjectKey {
 
 struct GeometryKey {
   void *id;
-  bool use_particle_hair;
+  Geometry::Type geometry_type;
 
-  GeometryKey(void *id, bool use_particle_hair) : id(id), use_particle_hair(use_particle_hair)
+  GeometryKey(void *id, Geometry::Type geometry_type) : id(id), geometry_type(geometry_type)
   {
   }
 
@@ -242,7 +243,7 @@ struct GeometryKey {
       return true;
     }
     else if (id == k.id) {
-      if (use_particle_hair < k.use_particle_hair) {
+      if (geometry_type < k.geometry_type) {
         return true;
       }
     }