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animChannelScalarDynamic.h
1 // Filename: animChannelScalarDynamic.h
2 // Created by: drose (20Oct03)
3 //
4 ////////////////////////////////////////////////////////////////////
5 //
6 // PANDA 3D SOFTWARE
7 // Copyright (c) Carnegie Mellon University. All rights reserved.
8 //
9 // All use of this software is subject to the terms of the revised BSD
10 // license. You should have received a copy of this license along
11 // with this source code in a file named "LICENSE."
12 //
13 ////////////////////////////////////////////////////////////////////
14 
15 #ifndef ANIMCHANNELSCALARDYNAMIC_H
16 #define ANIMCHANNELSCALARDYNAMIC_H
17 
18 #include "pandabase.h"
19 
20 #include "animChannel.h"
21 
22 class PandaNode;
23 class TransformState;
24 
25 ////////////////////////////////////////////////////////////////////
26 // Class : AnimChannelScalarDynamic
27 // Description : An animation channel that accepts a scalar each frame
28 // from some dynamic input provided by code.
29 //
30 // This object operates in two modes: in explicit mode,
31 // the programmer should call set_value() each frame to
32 // indicate the new value; in implicit mode, the
33 // programmer should call set_value_node() to indicate
34 // the node whose X component will be copied to the
35 // scalar each frame.
36 ////////////////////////////////////////////////////////////////////
37 class EXPCL_PANDA_CHAN AnimChannelScalarDynamic : public AnimChannelScalar {
38 protected:
41 
42 public:
43  AnimChannelScalarDynamic(const string &name);
44 
45  virtual bool has_changed(int last_frame, double last_frac,
46  int this_frame, double this_frac);
47  virtual void get_value(int frame, PN_stdfloat &value);
48 
49 PUBLISHED:
50  void set_value(PN_stdfloat value);
51  void set_value_node(PandaNode *node);
52 
53 protected:
54  virtual AnimGroup *make_copy(AnimGroup *parent) const;
55 
56 private:
57  // This is filled in only if we are using the set_value_node()
58  // interface to get an implicit value from the transform on the
59  // indicated node each frame.
60  PT(PandaNode) _value_node;
61  CPT(TransformState) _value;
62  CPT(TransformState) _last_value;
63 
64  // This is used only if we are using the explicit set_value()
65  // interface.
66  bool _value_changed;
67  PN_stdfloat _float_value;
68 
69 public:
70  static void register_with_read_factory();
71  virtual void write_datagram(BamWriter *manager, Datagram &dg);
72  virtual int complete_pointers(TypedWritable **plist, BamReader *manager);
73  void fillin(DatagramIterator &scan, BamReader *manager);
74 
75  static TypedWritable *make_AnimChannelScalarDynamic(const FactoryParams &params);
76 
77 public:
78  virtual TypeHandle get_type() const {
79  return get_class_type();
80  }
81  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
82  static TypeHandle get_class_type() {
83  return _type_handle;
84  }
85  static void init_type() {
86  AnimChannelScalar::init_type();
87  register_type(_type_handle, "AnimChannelScalarDynamic",
88  AnimChannelScalar::get_class_type());
89  }
90 
91 private:
92  static TypeHandle _type_handle;
93 };
94 
95 #include "animChannelScalarDynamic.I"
96 
97 #endif
A basic node of the scene graph or data graph.
Definition: pandaNode.h:72
virtual int complete_pointers(TypedWritable **p_list, BamReader *manager)
Takes in a vector of pointes to TypedWritable objects that correspond to all the requests for pointer...
Definition: animGroup.cxx:327
This is the fundamental interface for extracting binary objects from a Bam file, as generated by a Ba...
Definition: bamReader.h:122
static void register_with_read_factory()
Factory method to generate a AnimGroup object.
Definition: animGroup.cxx:362
Base class for objects that can be written to and read from Bam files.
Definition: typedWritable.h:37
This is the fundamental interface for writing binary objects to a Bam file, to be extracted later by ...
Definition: bamWriter.h:73
This is our own Panda specialization on the default STL list.
Definition: plist.h:38
This template class is the parent class for all kinds of AnimChannels that return different values...
Definition: animChannel.h:30
virtual bool has_changed(int last_frame, double last_frac, int this_frame, double this_frac)
Returns true if the value has changed since the last call to has_changed().
This is the base class for AnimChannel and AnimBundle.
Definition: animGroup.h:36
An instance of this class is passed to the Factory when requesting it to do its business and construc...
Definition: factoryParams.h:40
virtual void write_datagram(BamWriter *manager, Datagram &me)
Function to write the important information in the particular object to a Datagram.
An animation channel that accepts a scalar each frame from some dynamic input provided by code...
A class to retrieve the individual data elements previously stored in a Datagram. ...
TypeHandle is the identifier used to differentiate C++ class types.
Definition: typeHandle.h:85
An ordered list of data elements, formatted in memory for transmission over a socket or writing to a ...
Definition: datagram.h:43