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panda/src/chan/animGroup.cxx

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// Filename: animGroup.cxx
// Created by:  drose (21Feb99)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://www.panda3d.org/license.txt .
//
// To contact the maintainers of this program write to
// panda3d@yahoogroups.com .
//
////////////////////////////////////////////////////////////////////


#include "animGroup.h"
#include "animBundle.h"
#include "config_chan.h"

#include <indent.h>
#include <datagram.h>
#include <datagramIterator.h>
#include <bamReader.h>
#include <bamWriter.h>


#include <algorithm>

TypeHandle AnimGroup::_type_handle;


////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::Constructor
//       Access: Public
//  Description: Creates the AnimGroup, and adds it to the indicated
//               parent.  The only way to delete it subsequently is to
//               delete the entire hierarchy.
////////////////////////////////////////////////////////////////////
AnimGroup::
AnimGroup(AnimGroup *parent, const string &name) : Namable(name) {
  nassertv(parent != NULL);

  parent->_children.push_back(this);
  _root = parent->_root;
}


////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::get_num_children
//       Access: Public
//  Description: Returns the number of child nodes of the group.
////////////////////////////////////////////////////////////////////
int AnimGroup::
get_num_children() const {
  return _children.size();
}


////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::get_child
//       Access: Public
//  Description: Returns the nth child of the group.
////////////////////////////////////////////////////////////////////
AnimGroup *AnimGroup::
get_child(int n) const {
  nassertr(n >= 0 && n < (int)_children.size(), NULL);
  return _children[n];
}

////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::find_child
//       Access: Public
//  Description: Returns the first descendant found with the indicated
//               name, or NULL if no such descendant exists.
////////////////////////////////////////////////////////////////////
AnimGroup *AnimGroup::
find_child(const string &name) const {
  Children::const_iterator ci;
  for (ci = _children.begin(); ci != _children.end(); ++ci) {
    AnimGroup *child = (*ci);
    if (child->get_name() == name) {
      return child;
    }
    AnimGroup *result = child->find_child(name);
    if (result != (AnimGroup *)NULL) {
      return result;
    }
  }

  return (AnimGroup *)NULL;
}

////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::get_value_type
//       Access: Public, Virtual
//  Description: Returns the TypeHandle associated with the ValueType
//               we are concerned with.  This is provided to allow a
//               bit of run-time checking that joints and channels are
//               matching properly in type.
////////////////////////////////////////////////////////////////////
TypeHandle AnimGroup::
get_value_type() const {
  return TypeHandle::none();
}


// An STL object to sort a list of children into alphabetical order.
class AnimGroupAlphabeticalOrder {
public:
  bool operator()(const PT(AnimGroup) &a, const PT(AnimGroup) &b) const {
    return a->get_name() < b->get_name();
  }
};

////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::sort_descendants
//       Access: Public
//  Description: Sorts the children nodes at each level of the
//               hierarchy into alphabetical order.  This should be
//               done after creating the hierarchy, to guarantee that
//               the correct names will match up together when the
//               AnimBundle is later bound to a PlayerRoot.
////////////////////////////////////////////////////////////////////
void AnimGroup::
sort_descendants() {
  sort(_children.begin(), _children.end(), AnimGroupAlphabeticalOrder());

  Children::iterator ci;
  for (ci = _children.begin(); ci != _children.end(); ++ci) {
    (*ci)->sort_descendants();
  }
}


////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::output
//       Access: Public, Virtual
//  Description: Writes a one-line description of the group.
////////////////////////////////////////////////////////////////////
void AnimGroup::
output(ostream &out) const {
  out << get_type() << " " << get_name();
}

////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::write
//       Access: Public, Virtual
//  Description: Writes a brief description of the group and all of
//               its descendants.
////////////////////////////////////////////////////////////////////
void AnimGroup::
write(ostream &out, int indent_level) const {
  indent(out, indent_level) << *this << " {\n";
  write_descendants(out, indent_level + 2);
  indent(out, indent_level) << "}\n";
}

////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::write_descendants
//       Access: Protected
//  Description: Writes a brief description of all of the group's
//               descendants.
////////////////////////////////////////////////////////////////////
void AnimGroup::
write_descendants(ostream &out, int indent_level) const {
  Children::const_iterator ci;

  for (ci = _children.begin(); ci != _children.end(); ++ci) {
    (*ci)->write(out, indent_level);
  }
}

////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::write_datagram
//       Access: Public
//  Description: Function to write the important information in
//               the particular object to a Datagram
////////////////////////////////////////////////////////////////////
void AnimGroup::
write_datagram(BamWriter *manager, Datagram &me)
{
  me.add_string(get_name());
  //Write out the root
  manager->write_pointer(me, this->_root);
  me.add_uint16(_children.size());
  for(int i = 0; i < (int)_children.size(); i++)
  {
    manager->write_pointer(me, _children[i]);
  }
}

////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::fillin
//       Access: Protected
//  Description: Function that reads out of the datagram (or asks
//               manager to read) all of the data that is needed to
//               re-create this object and stores it in the appropiate
//               place
////////////////////////////////////////////////////////////////////
void AnimGroup::
fillin(DatagramIterator& scan, BamReader* manager)
{
  set_name(scan.get_string());
  manager->read_pointer(scan);
  _num_children = scan.get_uint16();
  for(int i = 0; i < _num_children; i++)
  {
    manager->read_pointer(scan);
  }
}

////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::complete_pointers
//       Access: Public
//  Description: Takes in a vector of pointes to TypedWritable
//               objects that correspond to all the requests for
//               pointers that this object made to BamReader.
////////////////////////////////////////////////////////////////////
int AnimGroup::
complete_pointers(TypedWritable **p_list, BamReader*)
{
  nassertr(p_list[0] != TypedWritable::Null, 0);
  _root = DCAST(AnimBundle, p_list[0]);
  for(int i = 1; i < _num_children+1; i++)
  {
    if (p_list[i] == TypedWritable::Null)
    {
      chan_cat->warning() << get_type().get_name()
                          << " Ignoring null child" << endl;
    }
    else
    {
      _children.push_back(DCAST(AnimGroup, p_list[i]));
    }
  }
  return _num_children+1;
}

////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::make_AnimGroup
//       Access: Protected
//  Description: Factory method to generate a AnimGroup object
////////////////////////////////////////////////////////////////////
TypedWritable* AnimGroup::
make_AnimGroup(const FactoryParams &params)
{
  AnimGroup *me = new AnimGroup;
  DatagramIterator scan;
  BamReader *manager;

  parse_params(params, scan, manager);
  me->fillin(scan, manager);
  return me;
}

////////////////////////////////////////////////////////////////////
//     Function: AnimGroup::register_with_factory
//       Access: Public, Static
//  Description: Factory method to generate a AnimGroup object
////////////////////////////////////////////////////////////////////
void AnimGroup::
register_with_read_factory(void)
{
  BamReader::get_factory()->register_factory(get_class_type(), make_AnimGroup);
}

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