Restore grid and angle snapping (#640)

Restore grid and angle snapping (LYN-3367)

Gems/Atom/Tools/AtomToolsFramework/Code/Include/AtomToolsFramework/Viewport/RenderViewportWidget.h

@@ -99,6 +99,9 @@ namespace AtomToolsFramework
         AZStd::optional<AzToolsFramework::ViewportInteraction::ProjectedViewportRay> ViewportScreenToWorldRay(
             const AzFramework::ScreenPoint& screenPosition) override;
 
+        //! Set interface for providing viewport specific settings (e.g. snapping properties).
+        void SetViewportSettings(AzToolsFramework::ViewportInteraction::ViewportSettings* viewportSettings);
+
         // AzToolsFramework::ViewportInteraction::ViewportMouseCursorRequestBus::Handler ...
         void BeginCursorCapture() override;
         void EndCursorCapture() override;
@@ -156,5 +159,7 @@ namespace AtomToolsFramework
         bool m_capturingCursor = false;
         // The last known position of the mouse cursor, if one is available.
         AZStd::optional<QPoint> m_lastCursorPosition;
+        // The viewport settings (e.g. grid snapping, grid size) for this viewport.
+        const AzToolsFramework::ViewportInteraction::ViewportSettings* m_viewportSettings = nullptr;
     };
 } //namespace AtomToolsFramework

Gems/Atom/Tools/AtomToolsFramework/Code/Source/Viewport/RenderViewportWidget.cpp

@@ -384,27 +384,32 @@ namespace AtomToolsFramework
 
     bool RenderViewportWidget::GridSnappingEnabled()
     {
-        return false;
+        return m_viewportSettings ? m_viewportSettings->GridSnappingEnabled() : false;
     }
 
     float RenderViewportWidget::GridSize()
     {
-        return 0.0f;
+        return m_viewportSettings ? m_viewportSettings->GridSize() : 0.0f;
     }
 
     bool RenderViewportWidget::ShowGrid()
     {
-        return false;
+        return m_viewportSettings ? m_viewportSettings->ShowGrid() : false;
     }
 
     bool RenderViewportWidget::AngleSnappingEnabled()
     {
-        return false;
+        return m_viewportSettings ? m_viewportSettings->AngleSnappingEnabled() : false;
     }
 
     float RenderViewportWidget::AngleStep()
     {
-        return 0.0f;
+        return m_viewportSettings ? m_viewportSettings->AngleStep() : 0.0f;
+    }
+
+    void RenderViewportWidget::SetViewportSettings(AzToolsFramework::ViewportInteraction::ViewportSettings* viewportSettings)
+    {
+        m_viewportSettings = viewportSettings;
     }
 
     AzFramework::ScreenPoint RenderViewportWidget::ViewportWorldToScreen(const AZ::Vector3& worldPosition)