Changed the DiffuseProbeGrid and ReflectionProbe components to only override the Box size if it's at the default (unit)

Signed-off-by: dmcdiar <dmcdiar@amazon.com>

Gems/AtomLyIntegration/CommonFeatures/Code/Source/ReflectionProbe/ReflectionProbeComponentConstants.h

@@ -13,5 +13,6 @@ namespace AZ
     {
         static constexpr const char* const ReflectionProbeComponentTypeId = "{E5D29F09-F974-45FE-A1D0-2126079D1021}";
         static constexpr const char* const EditorReflectionProbeComponentTypeId = "{6EBF2E41-2918-48B8-ACC3-FB115ED09E64}";
+        static constexpr float DefaultReflectionProbeExtents = 8.0f;
     } // namespace Render
 } // namespace AZ

Gems/AtomLyIntegration/CommonFeatures/Code/Source/ReflectionProbe/ReflectionProbeComponentController.cpp

@@ -127,9 +127,21 @@ namespace AZ
             // set the visualization sphere option
             m_featureProcessor->ShowProbeVisualization(m_handle, m_configuration.m_showVisualization);
 
-            // update the outer extents from the box shape
-            // if the user already resized the box shape on this entity it will inherit those extents
-            UpdateOuterExtents();
+            // if this is a new ReflectionProbe entity and the box shape has not been changed (i.e., it's still unit sized)
+            // then set the shape to the default extents
+            AZ::Vector3 boxDimensions = m_boxShapeInterface->GetBoxDimensions();
+            if (m_configuration.m_entityId == EntityId::InvalidEntityId && boxDimensions == AZ::Vector3(1.0f))
+            {
+                AZ::Vector3 extents(m_configuration.m_outerWidth, m_configuration.m_outerLength, m_configuration.m_outerHeight);
+
+                // resize the box shape, this will invoke OnShapeChanged
+                m_boxShapeInterface->SetBoxDimensions(extents);
+            }
+            else
+            {
+                // update the outer extents from the box shape
+                UpdateOuterExtents();
+            }
 
             // set the inner extents
             m_featureProcessor->SetProbeInnerExtents(m_handle, AZ::Vector3(m_configuration.m_innerWidth, m_configuration.m_innerLength, m_configuration.m_innerHeight));

Gems/AtomLyIntegration/CommonFeatures/Code/Source/ReflectionProbe/ReflectionProbeComponentController.h

@@ -14,6 +14,7 @@
 #include <Atom/Feature/ReflectionProbe/ReflectionProbeFeatureProcessorInterface.h>
 #include <Atom/RPI.Public/Model/Model.h>
 #include <LmbrCentral/Shape/BoxShapeComponentBus.h>
+#include <ReflectionProbe/ReflectionProbeComponentConstants.h>
 
 namespace AZ
 {
@@ -50,12 +51,12 @@ namespace AZ
             AZ_CLASS_ALLOCATOR(ReflectionProbeComponentConfig, SystemAllocator, 0);
             static void Reflect(AZ::ReflectContext* context);
 
-            float m_outerHeight = 20.0f;
-            float m_outerLength = 20.0f;
-            float m_outerWidth = 20.0f;
-            float m_innerHeight = 20.0f;
-            float m_innerLength = 20.0f;
-            float m_innerWidth = 20.0f;
+            float m_outerHeight = DefaultReflectionProbeExtents;
+            float m_outerLength = DefaultReflectionProbeExtents;
+            float m_outerWidth = DefaultReflectionProbeExtents;
+            float m_innerHeight = DefaultReflectionProbeExtents;
+            float m_innerLength = DefaultReflectionProbeExtents;
+            float m_innerWidth = DefaultReflectionProbeExtents;
 
             bool m_useParallaxCorrection = true;
             bool m_showVisualization = true;