set_stop_this_frame

panda/src/tform/driveInterface.I

@@ -431,3 +431,30 @@ INLINE bool DriveInterface::
 get_force_mouse() const {
   return _force_mouse;
 }
+
+////////////////////////////////////////////////////////////////////
+//     Function: DriveInterface::set_stop_this_frame
+//       Access: Published
+//  Description: If stop_this_frame is true, the next time the frame
+//               is computed no motion will be allowed, and then the
+//               flag is reset to false.  This can be used to prevent
+//               too much movement when we know a long time has
+//               artificially elapsed, for instance when we take a
+//               screenshot, without munging the clock for everything
+//               else.
+////////////////////////////////////////////////////////////////////
+INLINE void DriveInterface::
+set_stop_this_frame(bool stop_this_frame) {
+  _stop_this_frame = stop_this_frame;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: DriveInterface::get_stop_this_frame
+//       Access: Published
+//  Description: Returns the current setting of the stop_this_frame
+//               flag.  See set_stop_this_frame().
+////////////////////////////////////////////////////////////////////
+INLINE bool DriveInterface::
+get_stop_this_frame() const {
+  return _stop_this_frame;
+}

panda/src/tform/driveInterface.cxx

@@ -139,6 +139,7 @@ DriveInterface(const string &name) :
 
   _ignore_mouse = false;
   _force_mouse = false;
+  _stop_this_frame = false;
 
   _mods.add_button(MouseButton::one());
   _mods.add_button(MouseButton::two());
@@ -345,6 +346,11 @@ apply(double x, double y, bool any_button) {
   // Now how far did we move based on the amount of time elapsed?
   float distance = ClockObject::get_global_clock()->get_dt() * _speed;
   float rotation = ClockObject::get_global_clock()->get_dt() * _rot_speed;
+  if (_stop_this_frame) {
+    distance = 0.0f;
+    rotation = 0.0f;
+    _stop_this_frame = false;
+  }
 
   // Now apply the vectors.
 

panda/src/tform/driveInterface.h

@@ -97,6 +97,9 @@ PUBLISHED:
   INLINE void set_force_mouse(bool force_mouse);
   INLINE bool get_force_mouse() const;
 
+  INLINE void set_stop_this_frame(bool stop_this_frame);
+  INLINE bool get_stop_this_frame() const;
+
   void set_mat(const LMatrix4f &mat);
   const LMatrix4f &get_mat();
 
@@ -128,6 +131,7 @@ private:
   LVector3f _vel;
   bool _ignore_mouse;
   bool _force_mouse;
+  bool _stop_this_frame;
 
   // This is only used to return a temporary value in get_mat().
   LMatrix4f _mat;