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animChannelScalarDynamic.h
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file animChannelScalarDynamic.h
10 * @author drose
11 * @date 2003-10-20
12 */
13
14#ifndef ANIMCHANNELSCALARDYNAMIC_H
15#define ANIMCHANNELSCALARDYNAMIC_H
16
17#include "pandabase.h"
18
19#include "animChannel.h"
20
21class PandaNode;
22class TransformState;
23
24/**
25 * An animation channel that accepts a scalar each frame from some dynamic
26 * input provided by code.
27 *
28 * This object operates in two modes: in explicit mode, the programmer should
29 * call set_value() each frame to indicate the new value; in implicit mode,
30 * the programmer should call set_value_node() to indicate the node whose X
31 * component will be copied to the scalar each frame.
32 */
33class EXPCL_PANDA_CHAN AnimChannelScalarDynamic : public AnimChannelScalar {
34protected:
37
38public:
39 AnimChannelScalarDynamic(const std::string &name);
40
41 virtual bool has_changed(int last_frame, double last_frac,
42 int this_frame, double this_frac);
43 virtual void get_value(int frame, PN_stdfloat &value);
44 INLINE PN_stdfloat get_value() const;
45 INLINE PandaNode *get_value_node() const;
46
47PUBLISHED:
48 void set_value(PN_stdfloat value);
49 void set_value_node(PandaNode *node);
50
51 MAKE_PROPERTY(value, get_value, set_value);
52 MAKE_PROPERTY(value_node, get_value_node, set_value_node);
53
54protected:
55 virtual AnimGroup *make_copy(AnimGroup *parent) const;
56
57private:
58 // This is filled in only if we are using the set_value_node() interface to
59 // get an implicit value from the transform on the indicated node each
60 // frame.
61 PT(PandaNode) _value_node;
62 CPT(TransformState) _value;
63 CPT(TransformState) _last_value;
64
65 // This is used only if we are using the explicit set_value() interface.
66 bool _value_changed;
67 PN_stdfloat _float_value;
68
69public:
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
77public:
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
91private:
92 static TypeHandle _type_handle;
93};
94
96
97#endif
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
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().
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.
This template class is the parent class for all kinds of AnimChannels that return different values.
Definition animChannel.h:28
This is the base class for AnimChannel and AnimBundle.
Definition animGroup.h:33
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...
static void register_with_read_factory()
Factory method to generate a AnimGroup object.
This is the fundamental interface for extracting binary objects from a Bam file, as generated by a Ba...
Definition bamReader.h:110
This is the fundamental interface for writing binary objects to a Bam file, to be extracted later by ...
Definition bamWriter.h:63
A class to retrieve the individual data elements previously stored in a Datagram.
An ordered list of data elements, formatted in memory for transmission over a socket or writing to a ...
Definition datagram.h:38
An instance of this class is passed to the Factory when requesting it to do its business and construc...
A basic node of the scene graph or data graph.
Definition pandaNode.h:65
Indicates a coordinate-system transform on vertices.
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
Base class for objects that can be written to and read from Bam files.
This is our own Panda specialization on the default STL list.
Definition plist.h:35
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
void register_type(TypeHandle &type_handle, const std::string &name)
This inline function is just a convenient way to call TypeRegistry::register_type(),...