The functionalities of VTK viewer are available via its Viewer
Toolbar. Buttons marked with small downward triangles have extended
-functionality which can be accessed by locking on them with left mouse
+functionality, which can be accessed by locking on them with left mouse
button.
\image html vtkviewer_toolbar.png
\image html vtk_view_camera_dump.png
-<b>Dump View</b> - exports an object from the viewer in bmp, png or
-jpeg image format.
+<b>Dump View</b> - exports an object from the viewer in bmp, png or jpeg image format.
<hr>
\image html vtk_view_style_switch.png
\image html vtk_view_highlight.png
-<b>Dynamic pre-selection switch</b> - allows to switch on/off dynamic
-pre-selection of objects. When the dynamic pre-selection is switched
-on, an objects can be selected by clicking the point/cell belonging to
-this object, with some performance loss. Switch dynamic pre-selection
-off to have a good performance on big objects (for example, huge
-meshes).
+These buttons allow switching between three pre-selection (highlighting) modes:
+- <b>Static pre-selection mode</b> - pre-selection is done in terms of bounding boxes;
+- <b>Dynamic pre-selection mode</b> - pre-selection is done in terms of cells, i.e. an object can be selected by clicking the point/cell belonging to this object. This mode causes some performance loss. It is advisable to switch dynamic pre-selection off to have a good performance on big objects (for example, huge meshes);
+- <b>Disable pre-selection</b> - pre-selection is disabled.
+
+<hr>
+
+\image html vtk_view_selection.png
+
+<b>Enable/Disable selection</b> - enables or disables selection in the view.
<hr>
\image html vtk_view_triedre.png
\image html vtk_view_pan.png
<b>Panning</b> - if the represented objects are greater that the
-visible area and you don't wish to use <b>Fit all</b> functionality,
-click on this button and you'll be able to drag the scene to see its
-remote parts.
+visible area and you do not wish to use <b>Fit all</b> functionality,
+click on this button to drag the scene to see its remote parts.
<hr>
\image html vtk_view_glpan.png
<b>Global panning</b> - allows to select a point to be the center of
-the presentation showing all displayed objects in the visible ares.
+the presentation showing all displayed objects in the visible area.
<hr>
\image html vtk_view_rotation_point.png
By default the rotation point is located in the Center of the bounding
box of an object.
-\image html set_rotation_point_dialog2.png
+\image html set_rotation_point_dialog3.png
-Unchecking <b>Use Bounding Box Center</b> checkbox allows you to
+Unchecking <b>Use Bounding Box Center</b> check-box allows you to
define the coordinates of the rotation point manually.
- <b>Set to Origin</b> button restores the default rotation point
coordinates.
-- <b>Select Point from View</b> button allows to select the rotation
- point in the 3D Viewer.
+- <b>Gravity Center of Selected Object</b> button allows using the gravity center of the object selected in the viewer as the center of the rotation point.
+When you click this button, you should first choose the type of selectable object: Point, Edge, Face or Solid and only then proceed with selection in the viewer.
<hr>
\image html vtk_view_anticlockwise.png
-<b>Rotate counterclockwise</b> - rotates view 90° counterclockwise.
+<b>Rotate counter-clockwise</b> - rotates view 90° counter-clockwise.
<hr>
\image html vtk_view_clockwise.png
\image html vtk_view_parameters.png
-<b>Change View Parameters</b> - this button provides access to the
-dialog box allowing customization different parameters of the view.
+<b>Change View Parameters</b> - this button gives access to the
+dialog for customization of various view parameters.
\image html vtk_view_parameters_dlg.png
-- <b>Projection Mode</b> - switchs to the Orthogonal / Perspective
- projection mode
+- <b>Projection Mode</b> - switches between the \b Orthogonal and \b Perspective projection modes.
- <b>Focal Point</b> - allows to specify the focal point of the view
- <b>Set to Bounding Box Center</b> - chooses the center of the
- bounding box of the current scene as the focal point.
-
+ bounding box of the current scene as the focal point;
- <b>Set to Origin</b> - chooses the global coordinates system origin as
- the focal point
-
+ the focal point;
- <b>Select Point from View</b> - allows to specify the focal point by the
- direct selection of a point in the view window
-
+ direct selection of a point in the view window;
- <b>X</b>, <b>Y</b>, <b>Z</b> - allows to input the coordinates of the focal
- point directly
+ point directly.
- <b>Camera Position</b> - allows to specify the position of the view camera:
-
- - <b>Absolute Coordinates</b> - either in absolute coordinates,
-
- - <b>Relative to Focal Point</b> - or as a offset to the focal point;
-
+ - <b>Absolute Coordinates</b> - in absolute coordinates;
+ - <b>Relative to Focal Point</b> - as a offset to the focal point;
- <b>Projection Direction</b> - allows specify the direction of the
projection vector;
+ - <b>Focal Distance</b> - the focal distance value.
- - <b>Focal Distance</b> - the focal distance value;
-
- - <b>View Up Direction</b> - direction of the "view up" vector.
+- <b>View Up Direction</b> - direction of the "view up" vector.
-- <b>Zooming</b> - the current zoom factor (available in the <b>Orthogonal
- mode</b> only)
+- <b>Zooming</b>
-- <b>View Angle</b> - the current view angle (available in the <b>Perspective
- mode</b> only)
+ - \b Scale - the current zoom factor (available in the <b>Orthogonal
+ mode</b> only);
+ - <b>View Angle</b> - the current view angle (available in the <b>Perspective
+ mode</b> only).
<hr>
<b>Synchronize view</b> - allows to synchronize 3d view
parameters. This button has two states - checked and
-unchecked. Clicking on this button opens a drop-down menu listing the
-compatible 3d views. As soon as the user selects any view from the
-list, the parameters (view point, position, zoom coefficient, etc.) of
-the current view are synchronized with the selected view (static
+unchecked. Clicking on this button opens a drop-down menu listing
+compatible 3d views. When a view is selected in the list , the parameters (view point, position, zoom coefficient, etc.) of the current view are synchronized with the selected view (static
synchronization).
-In addition, when this button is in the "checked" state, the dynamic
-synchronization of the views is performed, i.e. any zoom, pan, rotate
-or other view operation done in one view is automatically applied to
-the other view.
+In addition, when this button is "checked", the
+views are synchronized dynamically, i.e. any zoom, pan, rotate
+or other view operation done in one view is automatically applied to the other view.
<hr>
\image html vtk_view_parallel.png
