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