Panda3D
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occlusionQueryContext.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 occlusionQueryContext.h
10 * @author drose
11 * @date 2006-03-27
12 */
13
14#ifndef OCCLUSIONQUERYCONTEXT_H
15#define OCCLUSIONQUERYCONTEXT_H
16
17#include "pandabase.h"
18#include "queryContext.h"
19
20/**
21 * Returned from a GSG in response to begin_occlusion_query() ..
22 * end_occlusion_query(), this records the number of fragments (pixels) that
23 * passed the depth test between the bracketing calls.
24 */
25class EXPCL_PANDA_GOBJ OcclusionQueryContext : public QueryContext {
26public:
27 INLINE OcclusionQueryContext();
28
29 virtual int get_num_fragments() const=0;
30
31public:
32 static TypeHandle get_class_type() {
33 return _type_handle;
34 }
35 static void init_type() {
36 QueryContext::init_type();
37 register_type(_type_handle, "OcclusionQueryContext",
38 QueryContext::get_class_type());
39 }
40 virtual TypeHandle get_type() const {
41 return get_class_type();
42 }
43 virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
44
45private:
46 static TypeHandle _type_handle;
47
48 friend class PreparedGraphicsObjects;
49};
50
52
53#endif
Returned from a GSG in response to begin_occlusion_query() .
A table of objects that are saved within the graphics context for reference by handle later.
This is a base class for queries that might require a round-trip to the graphics engine.
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
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(),...