flyTo function where only the new scene center needs to be specified while the...

flyTo function where only the new scene center needs to be specified while the eye position is recomputed automatically

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@10447 383ad7c9-94d9-4d36-a494-682f7c89f535

BasePlugin/PluginFunctions.cc

@@ -1013,11 +1013,24 @@ void get_all_objects( std::vector < BaseObjectData*>& _objects ) {
 
 }
 
-///   Fly to point and viewing direction (animated).
+
+/// Fly to point and viewing direction (animated).
 void flyTo (const ACG::Vec3d &_position, const ACG::Vec3d &_center, double _time) {
    examiner_widgets_[activeExaminer_]->flyTo(_position,_center,_time);
 }
 
+
+/// Fly to point and keep viewing direction (animated).
+void flyTo (const ACG::Vec3d &_center, bool _move_back, double _time) {
+  ACG::Vec3d eye = PluginFunctions::viewerProperties().glState().eye();
+  ACG::Vec3d t = _center - eye;
+  ACG::Vec3d e = eye + t * (_move_back ? -0.5f : 0.5f);
+  examiner_widgets_[activeExaminer_]->flyTo(e, _center, _time);
+}
+
+
+
+
 // ===============================================================================
 // Getting data from objects and casting between them
 // ===============================================================================

BasePlugin/PluginFunctionsViewControls.hh

@@ -394,6 +394,16 @@ void setFixedView(int _mode, int _viewer = ACTIVE_VIEWER );
 DLLEXPORT
 void flyTo (const ACG::Vec3d &_position, const ACG::Vec3d &_center, double _time=1000.0);
 
+
+/**  Fly to point and keep viewing direction (animated).
+ * @param _center    The new scene center ( the point we are looking at )
+ * @param _move_back Get closer if \c _move_back=\c true, get more distant else.
+ * @param _time      Animation time in ms
+ */
+DLLEXPORT
+void flyTo (const ACG::Vec3d &_center, bool _move_back = true, double _time=1000.0);
+
+
 /** @} */
 
 }