87 lines
1.9 KiB
Text
87 lines
1.9 KiB
Text
|
/**
|
||
|
|
* PANDA 3D SOFTWARE
|
||
|
|
* Copyright (c) Carnegie Mellon University. All rights reserved.
|
||
|
|
*
|
||
|
|
* All use of this software is subject to the terms of the revised BSD
|
||
|
|
* license. You should have received a copy of this license along
|
||
|
|
* with this source code in a file named "LICENSE."
|
||
|
|
*
|
||
|
|
* @file timedCycle.I
|
||
|
|
* @author jason
|
||
|
|
* @date 2000-08-01
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
INLINE TimedCycle::
|
||
|
|
TimedCycle() :
|
||
|
|
_cycle_time(30),
|
||
|
|
_inv_cycle_time(1./30),
|
||
|
|
_next_switch(-1),
|
||
|
|
_current_child(0),
|
||
|
|
_element_count(0)
|
||
|
|
{
|
||
|
|
_global_clock = ClockObject::get_global_clock();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
INLINE TimedCycle::
|
||
|
|
TimedCycle(PN_stdfloat cycle_time, int element_count) :
|
||
|
|
_cycle_time(cycle_time),
|
||
|
|
_current_child(0),
|
||
|
|
_element_count(element_count)
|
||
|
|
{
|
||
|
|
nassertv(_cycle_time > 0);
|
||
|
|
_global_clock = ClockObject::get_global_clock();
|
||
|
|
_next_switch = _global_clock->get_frame_time() + _cycle_time;
|
||
|
|
_inv_cycle_time = 1. / _cycle_time;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the number of elements being cycled through
|
||
|
|
*/
|
||
|
|
INLINE void TimedCycle::
|
||
|
|
set_element_count(int element_count)
|
||
|
|
{
|
||
|
|
_element_count = element_count;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the number of elements being cycled through
|
||
|
|
*/
|
||
|
|
INLINE void TimedCycle::
|
||
|
|
set_cycle_time(PN_stdfloat cycle_time)
|
||
|
|
{
|
||
|
|
nassertv(cycle_time > 0);
|
||
|
|
if (_next_switch == -1)
|
||
|
|
{
|
||
|
|
_next_switch = _global_clock->get_frame_time() + cycle_time;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
_next_switch = _next_switch - _cycle_time + cycle_time;
|
||
|
|
}
|
||
|
|
_cycle_time = cycle_time;
|
||
|
|
_inv_cycle_time = 1. / _cycle_time;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the number of elements being cycled through
|
||
|
|
*/
|
||
|
|
INLINE int TimedCycle::
|
||
|
|
next_element()
|
||
|
|
{
|
||
|
|
double current_time = _global_clock->get_frame_time();
|
||
|
|
unsigned int increment = (unsigned int) ((current_time - _next_switch)
|
||
|
|
* _inv_cycle_time);
|
||
|
|
|
||
|
|
_next_switch += _cycle_time * increment;
|
||
|
|
_current_child = (_current_child + increment) % _element_count;
|
||
|
|
|
||
|
|
return _current_child;
|
||
|
|
}
|