Panel 3D previewer: for show 3D body shapes, regardless the 3D viewer itself.

the Panel 3D previewer is made to show 3D body shapes, so do not show them
when disabled in the board 3D viewer, is really stupid.

3d-viewer/3d_canvas/board_adapter.cpp

@@ -79,6 +79,7 @@ BOARD_ADAPTER::BOARD_ADAPTER() :
         m_Cfg( nullptr ),
         m_IsBoardView( true ),
         m_MousewheelPanning( true ),
+        m_IsPreviewer( false ),
         m_board( nullptr ),
         m_3dModelManager( nullptr ),
         m_colors( nullptr ),
@@ -257,6 +258,9 @@ bool BOARD_ADAPTER::Is3dLayerEnabled( PCB_LAYER_ID aLayer ) const
 
 bool BOARD_ADAPTER::IsFootprintShown( FOOTPRINT_ATTR_T aFPAttributes ) const
 {
+    if( m_IsPreviewer )     // In panel Preview, footprints are always shown, of cource
+        return true;
+
     if( aFPAttributes & FP_SMD )
         return m_Cfg->m_Render.show_footprints_insert;
     else if( aFPAttributes & FP_THROUGH_HOLE )

3d-viewer/3d_canvas/board_adapter.h

@@ -527,6 +527,9 @@ public:
     EDA_3D_VIEWER_SETTINGS*     m_Cfg;
     bool                        m_IsBoardView;
     bool                        m_MousewheelPanning;
+    bool                        m_IsPreviewer;  ///< true if the board adaptater is living in a
+                                                ///< 3d preview panel, false for the standard 3D viewer
+                                                ///< allows specific features for the panel previewer
 
     SFVEC4F m_BgColorBot;         ///< background bottom color
     SFVEC4F m_BgColorTop;         ///< background top color

3d-viewer/dialogs/panel_preview_3d_model.cpp

@@ -98,6 +98,8 @@ PANEL_PREVIEW_3D_MODEL::PANEL_PREVIEW_3D_MODEL( wxWindow* aParent, PCB_BASE_FRAM
 
     m_boardAdapter.SetBoard( m_dummyBoard );
     m_boardAdapter.m_IsBoardView = false;
+    m_boardAdapter.m_IsPreviewer = true;   // Force display 3D models, regardless the 3D viewer options
+
     loadSettings();
 
     // Create the manager