a few more pview features

panda/src/framework/pandaFramework.I

@@ -126,6 +126,28 @@ get_lighting() const {
   return _lighting_enabled;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: PandaFramework::has_highlight
+//       Access: Public
+//  Description: Returns true if any node is highlighted, false
+//               otherwise.
+////////////////////////////////////////////////////////////////////
+INLINE bool PandaFramework::
+has_highlight() const {
+  return !_highlight.is_empty();
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: PandaFramework::get_highlight
+//       Access: Public
+//  Description: Returns the currently highlighted node, if any, or an
+//               empty NodePath if no node is highlighted.
+////////////////////////////////////////////////////////////////////
+INLINE const NodePath &PandaFramework::
+get_highlight() const {
+  return _highlight;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: PandaFramework::set_exit_flag
 //       Access: Public

panda/src/framework/pandaFramework.cxx

@@ -245,6 +245,22 @@ close_all_windows() {
   _windows.clear();
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: PandaFramework::get_models
+//       Access: Public
+//  Description: Returns the root of the scene graph normally reserved
+//               for parenting models and such.  This scene graph may
+//               be instanced to each window's render tree as the
+//               window is created.
+////////////////////////////////////////////////////////////////////
+const NodePath &PandaFramework::
+get_models() {
+  if (_models.is_empty()) {
+    _models = NodePath("models");
+  }
+  return _models;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: PandaFramework::report_frame_rate
 //       Access: Public
@@ -340,6 +356,36 @@ set_lighting(bool enable) {
   _lighting_enabled = enable;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: PandaFramework::set_highlight
+//       Access: Public
+//  Description: Sets the indicated node (normally a node within the
+//               get_models() tree) up as the highlighted node.
+//               Certain operations affect the highlighted node only.
+////////////////////////////////////////////////////////////////////
+void PandaFramework::
+set_highlight(const NodePath &node) {
+  clear_highlight();
+  _highlight = node;
+  if (!_highlight.is_empty()) {
+    framework_cat.info(false) << _highlight << "\n";
+    _highlight.show_bounds();
+  }
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: PandaFramework::clear_highlight
+//       Access: Public
+//  Description: Unhighlights the currently highlighted node, if any.
+////////////////////////////////////////////////////////////////////
+void PandaFramework::
+clear_highlight() {
+  if (!_highlight.is_empty()) {
+    _highlight.hide_bounds();
+    _highlight = NodePath();
+  }
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: PandaFramework::enable_default_keys
 //       Access: Public
@@ -441,6 +487,12 @@ do_enable_default_keys() {
   _event_handler.add_hook("t", event_t, this);
   _event_handler.add_hook("b", event_b, this);
   _event_handler.add_hook("l", event_l, this);
+  _event_handler.add_hook("c", event_c, this);
+  _event_handler.add_hook("h", event_h, this);
+  _event_handler.add_hook("arrow_up", event_arrow_up, this);
+  _event_handler.add_hook("arrow_down", event_arrow_down, this);
+  _event_handler.add_hook("arrow_left", event_arrow_left, this);
+  _event_handler.add_hook("arrow_right", event_arrow_right, this);
   _event_handler.add_hook("shift-s", event_S, this);
 }
 
@@ -514,6 +566,133 @@ event_l(CPT_Event, void *data) {
   self->set_lighting(!self->get_lighting());
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: PandaFramework::event_c
+//       Access: Protected, Static
+//  Description: Default handler for c key: center the trackball over
+//               the scene, or over the highlighted part of the scene.
+////////////////////////////////////////////////////////////////////
+void PandaFramework::
+event_c(CPT_Event, void *data) {
+  PandaFramework *self = (PandaFramework *)data;
+
+  NodePath center_around = self->get_highlight();
+  if (center_around.is_empty()) {
+    center_around = self->get_models();
+  }
+
+  Windows::iterator wi;
+  for (wi = self->_windows.begin(); wi != self->_windows.end(); ++wi) {
+    WindowFramework *wf = (*wi);
+    wf->center_trackball(center_around);
+  }
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: PandaFramework::event_h
+//       Access: Protected, Static
+//  Description: Default handler for h key: toggle highlight mode.  In
+//               this mode, you can walk the scene graph with the
+//               arrow keys to highlight different nodes.
+////////////////////////////////////////////////////////////////////
+void PandaFramework::
+event_h(CPT_Event, void *data) {
+  PandaFramework *self = (PandaFramework *)data;
+  
+  if (self->has_highlight()) {
+    self->clear_highlight();
+  } else {
+    self->set_highlight(self->get_models());
+  }
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: PandaFramework::event_arrow_up
+//       Access: Protected, Static
+//  Description: Default handler for up arrow key: in highlight mode,
+//               move the highlight to the node's parent.
+////////////////////////////////////////////////////////////////////
+void PandaFramework::
+event_arrow_up(CPT_Event, void *data) {
+  PandaFramework *self = (PandaFramework *)data;
+
+  if (self->has_highlight()) {
+    NodePath node = self->get_highlight();
+    if (node.has_parent() && node != self->get_models()) {
+      self->set_highlight(node.get_parent());
+    }
+  }
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: PandaFramework::event_arrow_down
+//       Access: Protected, Static
+//  Description: Default handler for up arrow key: in highlight mode,
+//               move the highlight to the node's first child.
+////////////////////////////////////////////////////////////////////
+void PandaFramework::
+event_arrow_down(CPT_Event, void *data) {
+  PandaFramework *self = (PandaFramework *)data;
+
+  if (self->has_highlight()) {
+    NodePath node = self->get_highlight();
+    if (node.get_num_children() > 0) {
+      self->set_highlight(node.get_child(0));
+    }
+  }
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: PandaFramework::event_arrow_left
+//       Access: Protected, Static
+//  Description: Default handler for up arrow key: in highlight mode,
+//               move the highlight to the node's nearest sibling on
+//               the left.
+////////////////////////////////////////////////////////////////////
+void PandaFramework::
+event_arrow_left(CPT_Event, void *data) {
+  PandaFramework *self = (PandaFramework *)data;
+
+  if (self->has_highlight()) {
+    NodePath node = self->get_highlight();
+    NodePath parent = node.get_parent();
+    if (node.has_parent() && node != self->get_models()) {
+      int index = parent.node()->find_child(node.node());
+      nassertv(index >= 0);
+      int sibling = index - 1;
+      if (sibling >= 0) {
+        self->set_highlight(NodePath(parent, parent.node()->get_child(sibling)));
+      }
+    }
+  }
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: PandaFramework::event_arrow_right
+//       Access: Protected, Static
+//  Description: Default handler for up arrow key: in highlight mode,
+//               move the highlight to the node's nearest sibling on
+//               the right.
+////////////////////////////////////////////////////////////////////
+void PandaFramework::
+event_arrow_right(CPT_Event, void *data) {
+  PandaFramework *self = (PandaFramework *)data;
+
+  if (self->has_highlight()) {
+    NodePath node = self->get_highlight();
+    NodePath parent = node.get_parent();
+    if (node.has_parent() && node != self->get_models()) {
+      int index = parent.node()->find_child(node.node());
+      nassertv(index >= 0);
+      int num_children = parent.node()->get_num_children();
+      int sibling = index + 1;
+      if (sibling < num_children) {
+        self->set_highlight(NodePath(parent, parent.node()->get_child(sibling)));
+      }
+    }
+  }
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: PandaFramework::event_S
 //       Access: Protected, Static

panda/src/framework/pandaFramework.h

@@ -63,6 +63,8 @@ public:
   void close_window(int n);
   void close_all_windows();
 
+  const NodePath &get_models();
+
   void report_frame_rate(ostream &out) const;
   void reset_frame_rate();
 
@@ -76,6 +78,11 @@ public:
   INLINE bool get_two_sided() const;
   INLINE bool get_lighting() const;
 
+  void set_highlight(const NodePath &node);
+  void clear_highlight();
+  INLINE bool has_highlight() const;
+  INLINE const NodePath &get_highlight() const;
+
   void enable_default_keys();
 
   virtual bool do_frame();
@@ -94,6 +101,12 @@ protected:
   static void event_t(CPT_Event, void *data);
   static void event_b(CPT_Event, void *data);
   static void event_l(CPT_Event, void *data);
+  static void event_c(CPT_Event, void *data);
+  static void event_h(CPT_Event, void *data);
+  static void event_arrow_up(CPT_Event, void *data);
+  static void event_arrow_down(CPT_Event, void *data);
+  static void event_arrow_left(CPT_Event, void *data);
+  static void event_arrow_right(CPT_Event, void *data);
   static void event_S(CPT_Event, void *data);
 
 
@@ -112,6 +125,8 @@ private:
   typedef pvector<WindowFramework *> Windows;
   Windows _windows;
 
+  NodePath _models;
+
   // For counting frame rate.
   double _start_time;
   int _frame_count;
@@ -121,6 +136,8 @@ private:
   bool _two_sided_enabled;
   bool _lighting_enabled;
 
+  NodePath _highlight;
+
   bool _default_keys_enabled;
 
   bool _exit_flag;

panda/src/framework/windowFramework.cxx

@@ -20,7 +20,6 @@
 #include "pandaFramework.h"
 #include "mouseAndKeyboard.h"
 #include "buttonThrower.h"
-#include "trackball.h"
 #include "transform2sg.h"
 #include "dSearchPath.h"
 #include "filename.h"
@@ -34,6 +33,9 @@
 #include "ambientLight.h"
 #include "directionalLight.h"
 #include "lightAttrib.h"
+#include "boundingSphere.h"
+#include "deg_2_rad.h"
+#include "config_framework.h"
 
 // This number is chosen arbitrarily to override any settings in model
 // files.
@@ -212,17 +214,88 @@ setup_trackball() {
   NodePath mouse = get_mouse();
   NodePath camera = get_camera_group();
 
-  PT(Trackball) trackball = new Trackball("trackball");
+  _trackball = new Trackball("trackball");
-  trackball->set_pos(LVector3f::forward() * 50.0);
+  _trackball->set_pos(LVector3f::forward() * 50.0);
-  mouse.attach_new_node(trackball);
+  mouse.attach_new_node(_trackball);
 
   PT(Transform2SG) tball2cam = new Transform2SG("tball2cam");
   tball2cam->set_node(camera.node());
-  trackball->add_child(tball2cam);
+  _trackball->add_child(tball2cam);
 
   _got_trackball = true;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: WindowFramework::center_trackball
+//       Access: Public
+//  Description: Centers the trackball on the indicated object, and
+//               scales the trackball motion suitably.
+////////////////////////////////////////////////////////////////////
+void WindowFramework::
+center_trackball(const NodePath &object) {
+  PT(BoundingVolume) volume = object.get_bounds();
+  // We expect at least a geometric bounding volume around the world.
+  nassertv(volume != (BoundingVolume *)NULL);
+  nassertv(volume->is_of_type(GeometricBoundingVolume::get_class_type()));
+  GeometricBoundingVolume *gbv = DCAST(GeometricBoundingVolume, volume);
+  
+  // Determine the bounding sphere around the world.  The topmost
+  // BoundingVolume might itself be a sphere (it's likely), but since
+  // it might not, we'll take no chances and make our own sphere.
+  PT(BoundingSphere) sphere = new BoundingSphere;
+  if (!sphere->extend_by(gbv)) {
+    framework_cat.warning()
+      << "Cannot determine bounding volume of " << object << "\n";
+    return;
+  }
+
+  if (sphere->is_infinite()) {
+    framework_cat.warning()
+      << "Infinite bounding volume for " << object << "\n";
+    return;
+  }
+
+  if (sphere->is_empty()) {
+    framework_cat.warning()
+      << "Empty bounding volume for " << object << "\n";
+    return;
+  }
+
+  LPoint3f center = sphere->get_center();
+  float radius = sphere->get_radius();
+
+  float distance = 50.0f;
+
+  // Choose a suitable distance to view the whole volume in our frame.
+  // This is based on the camera lens in use.  Determine the lens
+  // based on the first camera; this will be the default camera.
+  Lens *lens = (Lens *)NULL;
+  if (!_cameras.empty()) {
+    Cameras::const_iterator ci;
+    for (ci = _cameras.begin();
+         ci != _cameras.end() && lens == (Lens *)NULL;
+         ++ci) {
+      lens = (*ci)->get_lens();
+    }
+  }
+
+  if (lens != (Lens *)NULL) {
+    LVecBase2f fov = lens->get_fov();
+    distance = radius / ctan(deg_2_rad(min(fov[0], fov[1]) / 2.0f));
+
+    // Ensure the far plane is far enough back to see the entire object.
+    float ideal_far_plane = distance + radius;
+    lens->set_far(max(lens->get_default_far(), ideal_far_plane)); 
+  }
+
+  _trackball->set_origin(center);
+  _trackball->set_pos(LVector3f::forward() * distance);
+
+  // Also set the movement scale on the trackball to be consistent
+  // with the size of the model and the lens field-of-view.
+  _trackball->set_forward_scale(distance * 0.006);
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: WindowFramework::load_models
 //       Access: Public

panda/src/framework/windowFramework.h

@@ -24,6 +24,7 @@
 #include "camera.h"
 #include "graphicsWindow.h"
 #include "animControlCollection.h"
+#include "trackball.h"
 #include "filename.h"
 #include "pointerTo.h"
 #include "pvector.h"
@@ -60,6 +61,7 @@ public:
 
   void enable_keyboard();
   void setup_trackball();
+  void center_trackball(const NodePath &object);
 
   bool load_models(const NodePath &parent,
                    int argc, char *argv[], int first_arg = 1);
@@ -96,6 +98,7 @@ private:
   AnimControlCollection _anim_controls;
 
   NodePath _mouse;
+  PT(Trackball) _trackball;
 
   AmbientLight *_alight;
   DirectionalLight *_dlight;

panda/src/gobj/config_gobj.cxx

@@ -118,6 +118,10 @@ const int select_LOD_number = config_gobj.GetInt("select-LOD-number", -1);
 // will screen out successively higher levels
 const int minimum_LOD_number = config_gobj.GetInt("minimum-LOD-number", 0);
 
+// The default near and far plane distances.
+const float default_near = config_gobj.GetFloat("default-near", 1.0f);
+const float default_far = config_gobj.GetFloat("default-far", 1000.0f);
+
 static BamTextureMode
 parse_texture_mode(const string &mode) {
   if (mode == "fullpath") {

panda/src/gobj/lens.cxx

@@ -101,8 +101,8 @@ clear() {
   _focal_length = 1.0f;
   _fov.set(_default_fov, _default_fov);
   _aspect_ratio = 1.0f;
-  _near_distance = 1.0f;
+  _near_distance = default_near;
-  _far_distance = 1000.0f;
+  _far_distance = default_far;
   _view_hpr.set(0.0f, 0.0f, 0.0f);
   _view_vector.set(0.0f, 1.0f, 0.0f);
   _up_vector.set(0.0f, 0.0f, 1.0f);
@@ -387,6 +387,30 @@ get_aspect_ratio() const {
   return _aspect_ratio;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: Lens::get_default_near
+//       Access: Published, Static
+//  Description: Returns the default near plane distance that will be
+//               assigned to each newly-created lens.  This is read
+//               from the Configrc file.
+////////////////////////////////////////////////////////////////////
+float Lens::
+get_default_near() {
+  return default_near;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: Lens::get_default_far
+//       Access: Published, Static
+//  Description: Returns the default far plane distance that will be
+//               assigned to each newly-created lens.  This is read
+//               from the Configrc file.
+////////////////////////////////////////////////////////////////////
+float Lens::
+get_default_far() {
+  return default_far;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: Lens::set_view_hpr
 //       Access: Published

panda/src/gobj/lens.h

@@ -92,6 +92,9 @@ PUBLISHED:
   INLINE float get_far() const;
   INLINE void set_near_far(float near_distance, float far_distance);
 
+  static float get_default_near();
+  static float get_default_far();
+  
   INLINE void set_view_hpr(float h, float p, float r);
   void set_view_hpr(const LVecBase3f &view_hpr);
   const LVecBase3f &get_view_hpr() const;

panda/src/testbed/pview.cxx

@@ -30,11 +30,12 @@ main(int argc, char *argv[]) {
 
     window->enable_keyboard();
     window->setup_trackball();
+    framework.get_models().instance_to(window->get_render());
     if (argc < 2) {
       // If we have no arguments, get that trusty old triangle out.
-      window->load_default_model(window->get_render());
+      window->load_default_model(framework.get_models());
     } else {
-      window->load_models(window->get_render(), argc, argv);
+      window->load_models(framework.get_models(), argc, argv);
     }
     window->loop_animations();
 

panda/src/tform/trackball.cxx

@@ -66,7 +66,7 @@ Trackball(const string &name) :
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::Destructor
-//       Access: Public, Scheme
+//       Access: Published
 //  Description:
 ////////////////////////////////////////////////////////////////////
 Trackball::
@@ -75,7 +75,7 @@ Trackball::
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::reset
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Reinitializes all transforms to identity.
 ////////////////////////////////////////////////////////////////////
 void Trackball::
@@ -86,10 +86,34 @@ reset() {
   _mat = LMatrix4f::ident_mat();
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: Trackball::get_forward_scale
+//       Access: Published
+//  Description: Returns the scale factor applied to forward and
+//               backward motion.  See set_forward_scale().
+////////////////////////////////////////////////////////////////////
+float Trackball::
+get_forward_scale() const {
+  return _fwdscale;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: Trackball::set_forward_scale
+//       Access: Published
+//  Description: Changes the scale factor applied to forward and
+//               backward motion.  The larger this number, the faster
+//               the model will move in response to dollying in and
+//               out.
+////////////////////////////////////////////////////////////////////
+void Trackball::
+set_forward_scale(float fwdscale) {
+  _fwdscale = fwdscale;
+}
+
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::get_pos
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Return the offset from the center of rotation.
 ////////////////////////////////////////////////////////////////////
 const LPoint3f &Trackball::
@@ -115,7 +139,7 @@ get_z() const {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::set_pos
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Directly set the offset from the rotational origin.
 ////////////////////////////////////////////////////////////////////
 void Trackball::
@@ -151,7 +175,7 @@ set_z(float z) {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::get_hpr
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Return the trackball's orientation.
 ////////////////////////////////////////////////////////////////////
 LVecBase3f Trackball::
@@ -185,7 +209,7 @@ get_r() const {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::set_hpr
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Directly set the mover's orientation.
 ////////////////////////////////////////////////////////////////////
 void Trackball::
@@ -235,7 +259,7 @@ set_r(float r) {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::reset_origin_here
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Reposition the center of rotation to coincide with
 //               the current translation offset.  Future rotations
 //               will be about the current origin.
@@ -250,7 +274,7 @@ reset_origin_here() {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::move_origin
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Moves the center of rotation by the given amount.
 ////////////////////////////////////////////////////////////////////
 void Trackball::
@@ -258,10 +282,31 @@ move_origin(float x, float y, float z) {
   _rotation = LMatrix4f::translate_mat(LVecBase3f(x, y, z)) *  _rotation;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: Trackball::get_origin
+//       Access: Published
+//  Description: Returns the current center of rotation.
+////////////////////////////////////////////////////////////////////
+LPoint3f Trackball::
+get_origin() const {
+  return _rotation.get_row3(3);
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: Trackball::set_origin
+//       Access: Published
+//  Description: Directly sets the center of rotation.
+////////////////////////////////////////////////////////////////////
+void Trackball::
+set_origin(const LVecBase3f &origin) {
+  _rotation.set_row(3, LVecBase3f(0.0f, 0.0f, 0.0f));
+  _rotation = LMatrix4f::translate_mat(-origin) *  _rotation;
+}
+
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::set_invert
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Sets the invert flag.  When this is set, the inverse
 //               matrix is generated, suitable for joining to a
 //               camera, instead of parenting the scene under it.
@@ -273,7 +318,7 @@ set_invert(bool flag) {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::get_invert
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Returns the invert flag.  When this is set, the
 //               inverse matrix is generated, suitable for joining to
 //               a camera, instead of parenting the scene under it.
@@ -285,7 +330,7 @@ get_invert() const {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::set_rel_to
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Sets the NodePath that all trackball manipulations
 //               are to be assumed to be relative to.  For instance,
 //               set your camera node here to make the trackball
@@ -300,7 +345,7 @@ set_rel_to(const NodePath &rel_to) {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::get_rel_to
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Returns the NodePath that all trackball manipulations
 //               are relative to, or the empty path.
 ////////////////////////////////////////////////////////////////////
@@ -312,7 +357,7 @@ get_rel_to() const {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::set_coordinate_system
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Sets the coordinate system of the Trackball.
 //               Normally, this is the default coordinate system.
 //               This changes the axes the Trackball manipulates so
@@ -326,7 +371,7 @@ set_coordinate_system(CoordinateSystem cs) {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::get_coordinate_system
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Returns the coordinate system of the Trackball.
 //               See set_coordinate_system().
 ////////////////////////////////////////////////////////////////////
@@ -337,7 +382,7 @@ get_coordinate_system() const {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::set_mat
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Stores the indicated transform in the trackball.
 //               This is a transform in global space, regardless of
 //               the rel_to node.
@@ -357,7 +402,7 @@ set_mat(const LMatrix4f &mat) {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::get_mat
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Returns the matrix represented by the trackball
 //               rotation.
 ////////////////////////////////////////////////////////////////////
@@ -368,7 +413,7 @@ get_mat() const {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: Trackball::get_trans_mat
-//       Access: Public, Scheme
+//       Access: Published
 //  Description: Returns the actual transform that will be applied to
 //               the scene graph.  This is the same as get_mat(),
 //               unless invert is in effect.

panda/src/tform/trackball.h

@@ -48,6 +48,9 @@ PUBLISHED:
 
   void reset();
 
+  float get_forward_scale() const;
+  void set_forward_scale(float fwdscale);
+
   /// **** Translation ****
 
   const LPoint3f &get_pos() const;
@@ -77,6 +80,9 @@ PUBLISHED:
   void reset_origin_here();
   void move_origin(float x, float y, float z);
 
+  LPoint3f get_origin() const;
+  void set_origin(const LVecBase3f &origin);
+
   /// **** Misc ****
 
   void set_invert(bool flag);