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scissorAttrib.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 scissorAttrib.h
10 * @author drose
11 * @date 2008-07-29
12 */
13
14#ifndef SCISSORATTRIB_H
15#define SCISSORATTRIB_H
16
17#include "pandabase.h"
18
19#include "renderAttrib.h"
20#include "luse.h"
21
22class FactoryParams;
23
24/**
25 * This restricts rendering to within a rectangular region of the scene,
26 * without otherwise affecting the viewport or lens properties. Geometry that
27 * falls outside the scissor region is not rendered. It is akin to the OpenGL
28 * glScissor() function.
29 *
30 * The ScissorAttrib always specifies its region relative to its enclosing
31 * DisplayRegion, in screen space, and performs no culling.
32 *
33 * See ScissorEffect if you wish to define a region relative to 2-D or 3-D
34 * coordinates in the scene graph, with culling.
35 */
36class EXPCL_PANDA_PGRAPH ScissorAttrib : public RenderAttrib {
37private:
38 ScissorAttrib(const LVecBase4 &frame);
39
40PUBLISHED:
41 static CPT(RenderAttrib) make_off();
42 INLINE static CPT(RenderAttrib) make(PN_stdfloat left, PN_stdfloat right, PN_stdfloat bottom, PN_stdfloat top);
43 static CPT(RenderAttrib) make(const LVecBase4 &frame);
44 static CPT(RenderAttrib) make_default();
45
46 INLINE bool is_off() const;
47
48 INLINE const LVecBase4 &get_frame() const;
49
50PUBLISHED:
51 MAKE_PROPERTY(frame, get_frame);
52
53public:
54 virtual void output(std::ostream &out) const;
55
56protected:
57 virtual int compare_to_impl(const RenderAttrib *other) const;
58 virtual size_t get_hash_impl() const;
59 virtual CPT(RenderAttrib) compose_impl(const RenderAttrib *other) const;
60
61private:
62 LVecBase4 _frame;
63 bool _off;
64 static CPT(RenderAttrib) _off_attrib;
65
66PUBLISHED:
67 static int get_class_slot() {
68 return _attrib_slot;
69 }
70 virtual int get_slot() const {
71 return get_class_slot();
72 }
73 MAKE_PROPERTY(class_slot, get_class_slot);
74
75public:
76 static void register_with_read_factory();
77 virtual void write_datagram(BamWriter *manager, Datagram &dg);
78
79protected:
80 static TypedWritable *make_from_bam(const FactoryParams &params);
81 void fillin(DatagramIterator &scan, BamReader *manager);
82
83public:
84 static TypeHandle get_class_type() {
85 return _type_handle;
86 }
87 static void init_type() {
88 RenderAttrib::init_type();
89 register_type(_type_handle, "ScissorAttrib",
90 RenderAttrib::get_class_type());
91
92 ScissorAttrib *attrib = new ScissorAttrib(LVecBase4(0, 1, 0, 1));
93 attrib->_off = true;
94 _attrib_slot = register_slot(_type_handle, 100, attrib);
95 }
96 virtual TypeHandle get_type() const {
97 return get_class_type();
98 }
99 virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
100
101private:
102 static TypeHandle _type_handle;
103 static int _attrib_slot;
104};
105
106#include "scissorAttrib.I"
107
108#endif
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...
This is the base class for a number of render attributes (other than transform) that may be set on sc...
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
static int register_slot(TypeHandle type_handle, int sort, RenderAttrib *default_attrib)
Adds the indicated TypeHandle to the registry, if it is not there already, and returns a unique slot ...
This restricts rendering to within a rectangular region of the scene, without otherwise affecting the...
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.
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.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.