77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
// Filename: clockObject.cxx
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// Created by: drose (17Feb00)
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//
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////////////////////////////////////////////////////////////////////
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#include "clockObject.h"
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ClockObject *ClockObject::_global_clock = (ClockObject *)NULL;
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////////////////////////////////////////////////////////////////////
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// Function: ClockObject::Constructor
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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ClockObject::
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ClockObject() {
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_true_clock = TrueClock::get_ptr();
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_mode = M_normal;
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_start_time = _true_clock->get_real_time();
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_frame_count = 0;
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_frame_time = 0.0;
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_reported_time = 0.0;
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_dt = 0.0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: ClockObject::set_time
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// Access: Public
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// Description: Resets the clock to the indicated time. Also see
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// reset() and set_frame_count().
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////////////////////////////////////////////////////////////////////
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void ClockObject::
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set_time(double time) {
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double true_time = _true_clock->get_real_time();
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_start_time = true_time - time;
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_frame_time = time;
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switch (_mode) {
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case M_normal:
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_reported_time = _frame_time;
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break;
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case M_non_real_time:
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_reported_time = time;
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break;
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: ClockObject::tick
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// Access: Public
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// Description: Instructs the clock that a new frame has just begun.
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// In normal, real-time mode, get_time() will henceforth
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// report the time as of this instant as the current
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// start-of-frame time. In non-real-time mode,
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// get_time() will be incremented by the value of dt.
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////////////////////////////////////////////////////////////////////
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void ClockObject::
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tick() {
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double old_time = _frame_time;
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_frame_time = get_real_time();
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switch (_mode) {
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case M_normal:
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_dt = _frame_time - old_time;
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_reported_time = _frame_time;
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break;
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case M_non_real_time:
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_reported_time += _dt;
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break;
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}
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_frame_count++;
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}
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