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billboardEffect.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 billboardEffect.h
10 * @author drose
11 * @date 2002-03-14
12 */
13
14#ifndef BILLBOARDEFFECT_H
15#define BILLBOARDEFFECT_H
16
17#include "pandabase.h"
18
19#include "renderEffect.h"
20#include "luse.h"
21#include "nodePath.h"
22
23/**
24 * Indicates that geometry at this node should automatically rotate to face
25 * the camera, or any other arbitrary node.
26 */
27class EXPCL_PANDA_PGRAPH BillboardEffect : public RenderEffect {
28private:
29 INLINE BillboardEffect();
30
31PUBLISHED:
32 static CPT(RenderEffect) make(const LVector3 &up_vector,
33 bool eye_relative,
34 bool axial_rotate,
35 PN_stdfloat offset,
36 const NodePath &look_at,
37 const LPoint3 &look_at_point,
38 bool fixed_depth = false);
39 INLINE static CPT(RenderEffect) make_axis();
40 INLINE static CPT(RenderEffect) make_point_eye();
41 INLINE static CPT(RenderEffect) make_point_world();
42
43 INLINE bool is_off() const;
44 INLINE const LVector3 &get_up_vector() const;
45 INLINE bool get_eye_relative() const;
46 INLINE bool get_axial_rotate() const;
47 INLINE bool get_fixed_depth() const;
48 INLINE PN_stdfloat get_offset() const;
49 INLINE const NodePath &get_look_at() const;
50 INLINE const LPoint3 &get_look_at_point() const;
51
52public:
53 virtual bool safe_to_transform() const;
54 virtual CPT(TransformState) prepare_flatten_transform(const TransformState *net_transform) const;
55 virtual void output(std::ostream &out) const;
56
57 virtual bool has_cull_callback() const;
58 virtual void cull_callback(CullTraverser *trav, CullTraverserData &data,
59 CPT(TransformState) &node_transform,
60 CPT(RenderState) &node_state) const;
61
62 virtual bool has_adjust_transform() const;
63 virtual void adjust_transform(CPT(TransformState) &net_transform,
64 CPT(TransformState) &node_transform,
65 const PandaNode *node) const;
66
67protected:
68 virtual int compare_to_impl(const RenderEffect *other) const;
69
70private:
71 void compute_billboard(CPT(TransformState) &node_transform,
72 const TransformState *net_transform,
73 const TransformState *camera_transform) const;
74
75private:
76 bool _off;
77 bool _eye_relative;
78 bool _axial_rotate;
79 bool _fixed_depth;
80 LVector3 _up_vector;
81 PN_stdfloat _offset;
82 NodePath _look_at;
83 LPoint3 _look_at_point;
84
85public:
86 static void register_with_read_factory();
87 virtual void write_datagram(BamWriter *manager, Datagram &dg);
89 BamReader *manager);
90
91protected:
92 static TypedWritable *make_from_bam(const FactoryParams &params);
93 void fillin(DatagramIterator &scan, BamReader *manager);
94
95public:
96 static TypeHandle get_class_type() {
97 return _type_handle;
98 }
99 static void init_type() {
100 RenderEffect::init_type();
101 register_type(_type_handle, "BillboardEffect",
102 RenderEffect::get_class_type());
103 }
104 virtual TypeHandle get_type() const {
105 return get_class_type();
106 }
107 virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
108
109private:
110 static TypeHandle _type_handle;
111};
112
113#include "billboardEffect.I"
114
115#endif
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
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
Indicates that geometry at this node should automatically rotate to face the camera,...
This collects together the pieces of data that are accumulated for each node while walking the scene ...
This object performs a depth-first traversal of the scene graph, with optional view-frustum culling,...
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...
NodePath is the fundamental system for disambiguating instances, and also provides a higher-level int...
Definition nodePath.h:159
A basic node of the scene graph or data graph.
Definition pandaNode.h:65
This is the base class for a number of special render effects that may be set on scene graph nodes to...
virtual bool safe_to_transform() const
Returns true if it is generally safe to transform this particular kind of RenderEffect by calling the...
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
This represents a unique collection of RenderAttrib objects that correspond to a particular renderabl...
Definition renderState.h:47
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.
virtual int complete_pointers(TypedWritable **p_list, BamReader *manager)
Receives an array of pointers, one for each time manager->read_pointer() was called in fillin().
This is our own Panda specialization on the default STL list.
Definition plist.h:35
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
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(),...
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.