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frameRateMeter.I
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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 frameRateMeter.I
10 * @author drose
11 * @date 2003-12-23
12 */
13
14/**
15 * Returns the GraphicsOutput that was passed to setup_window(), or NULL if
16 * setup_window() has not been called.
17 */
18INLINE GraphicsOutput *FrameRateMeter::
19 get_window() const {
20 return _window;
21}
22
23/**
24 * Returns the DisplayRegion that the meter has created to render itself into
25 * the window to setup_window(), or NULL if setup_window() has not been
26 * called.
27 */
28INLINE DisplayRegion *FrameRateMeter::
29 get_display_region() const {
30 return _display_region;
31}
32
33/**
34 * Specifies the number of seconds that should elapse between updates to the
35 * frame rate indication. This should be reasonably slow (e.g. 0.2 to 1.0)
36 * so that the calculation of the frame rate text does not itself dominate the
37 * frame rate.
38 */
39INLINE void FrameRateMeter::
40 set_update_interval(double update_interval) {
41 _update_interval = update_interval;
42}
43
44/**
45 * Returns the number of seconds that will elapse between updates to the frame
46 * rate indication.
47 */
48INLINE double FrameRateMeter::
49 get_update_interval() const {
50 return _update_interval;
51}
52
53/**
54 * Sets the sprintf() pattern that is used to format the text. The string
55 * "%f" or some variant will be replaced with the current frame rate in frames
56 * per second.
57 */
58INLINE void FrameRateMeter::
59 set_text_pattern(const std::string &text_pattern) {
60 _text_pattern = text_pattern;
61 Thread *current_thread = Thread::get_current_thread();
62 do_update(current_thread);
63}
64
65/**
66 * Returns the sprintf() pattern that is used to format the text.
67 */
68INLINE const std::string &FrameRateMeter::
69 get_text_pattern() const {
70 return _text_pattern;
71}
72
73/**
74 * Sets the clock that is used to determine the frame rate. The default is
75 * the application's global clock (ClockObject::get_global_clock()).
76 */
77INLINE void FrameRateMeter::
78 set_clock_object(ClockObject *clock_object) {
79 _clock_object = clock_object;
80 _last_update = 0.0f;
81}
82
83/**
84 * Returns the clock that is used to determine the frame rate.
85 */
86INLINE ClockObject *FrameRateMeter::
87 get_clock_object() const {
88 return _clock_object;
89}
90
91/**
92 * You can call this to explicitly force the FrameRateMeter to update itself
93 * with the latest frame rate information. Normally, it is not necessary to
94 * call this explicitly.
95 */
96INLINE void FrameRateMeter::
97 update() {
98 Thread *current_thread = Thread::get_current_thread();
99 do_update(current_thread);
100}
ClockObject
A ClockObject keeps track of elapsed real time and discrete time.
Definition clockObject.h:58
DisplayRegion
A rectangular subregion within a window for rendering into.
Definition displayRegion.h:57
FrameRateMeter::set_clock_object
void set_clock_object(ClockObject *clock_object)
Sets the clock that is used to determine the frame rate.
Definition frameRateMeter.I:78
FrameRateMeter::get_display_region
DisplayRegion * get_display_region() const
Returns the DisplayRegion that the meter has created to render itself into the window to setup_window...
Definition frameRateMeter.I:29
FrameRateMeter::get_text_pattern
const std::string & get_text_pattern() const
Returns the sprintf() pattern that is used to format the text.
Definition frameRateMeter.I:69
FrameRateMeter::get_update_interval
double get_update_interval() const
Returns the number of seconds that will elapse between updates to the frame rate indication.
Definition frameRateMeter.I:49
FrameRateMeter::set_text_pattern
void set_text_pattern(const std::string &text_pattern)
Sets the sprintf() pattern that is used to format the text.
Definition frameRateMeter.I:59
FrameRateMeter::set_update_interval
void set_update_interval(double update_interval)
Specifies the number of seconds that should elapse between updates to the frame rate indication.
Definition frameRateMeter.I:40
FrameRateMeter::get_clock_object
ClockObject * get_clock_object() const
Returns the clock that is used to determine the frame rate.
Definition frameRateMeter.I:87
FrameRateMeter::update
void update()
You can call this to explicitly force the FrameRateMeter to update itself with the latest frame rate ...
Definition frameRateMeter.I:97
FrameRateMeter::get_window
GraphicsOutput * get_window() const
Returns the GraphicsOutput that was passed to setup_window(), or NULL if setup_window() has not been ...
Definition frameRateMeter.I:19
GraphicsOutput
This is a base class for the various different classes that represent the result of a frame of render...
Definition graphicsOutput.h:63
Thread
A thread; that is, a lightweight process.
Definition thread.h:46
Thread::get_current_thread
get_current_thread
Returns a pointer to the currently-executing Thread object.
Definition thread.h:109