add 'material' entity property

src/objects/EntityDef.hpp

@@ -39,6 +39,9 @@ struct EntityDef {
     /// @brief Skeleton ID
     std::string skeletonName = name;
 
+    /// @brief Solid entity material material
+    std::string material;
+
     /// @brief Does entity prevent blocks setup
     bool blocking = true;
 

src/objects/Rigidbody.cpp

@@ -87,4 +87,5 @@ void Rigidbody::initialize(
             create_sensor_callback<scripting::on_sensor_exit>(entities)};
     }
     hitbox.stepHeight = def.stepHeight;
+    hitbox.material = def.material;
 }