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Diffstat (limited to 'main/timer_sync.h')
| -rw-r--r-- | main/timer_sync.h | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/main/timer_sync.h b/main/timer_sync.h deleted file mode 100644 index fcce6d7a9a..0000000000 --- a/main/timer_sync.h +++ /dev/null @@ -1,101 +0,0 @@ -/*************************************************************************/ -/* timer_sync.h */ -/*************************************************************************/ -/* This file is part of: */ -/* GODOT ENGINE */ -/* https://godotengine.org */ -/*************************************************************************/ -/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */ -/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */ -/* */ -/* Permission is hereby granted, free of charge, to any person obtaining */ -/* a copy of this software and associated documentation files (the */ -/* "Software"), to deal in the Software without restriction, including */ -/* without limitation the rights to use, copy, modify, merge, publish, */ -/* distribute, sublicense, and/or sell copies of the Software, and to */ -/* permit persons to whom the Software is furnished to do so, subject to */ -/* the following conditions: */ -/* */ -/* The above copyright notice and this permission notice shall be */ -/* included in all copies or substantial portions of the Software. */ -/* */ -/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ -/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ -/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ -/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ -/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ -/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ -/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ -/*************************************************************************/ - -#ifndef TIMER_SYNC_H -#define TIMER_SYNC_H - -#include "core/engine.h" - -struct MainFrameTime { - float idle_step; // time to advance idles for (argument to process()) - int physics_steps; // number of times to iterate the physics engine - - void clamp_idle(float min_idle_step, float max_idle_step); -}; - -class MainTimerSync { - // wall clock time measured on the main thread - uint64_t last_cpu_ticks_usec; - uint64_t current_cpu_ticks_usec; - - // logical game time since last physics timestep - float time_accum; - - // current difference between wall clock time and reported sum of idle_steps - float time_deficit; - - // number of frames back for keeping accumulated physics steps roughly constant. - // value of 12 chosen because that is what is required to make 144 Hz monitors - // behave well with 60 Hz physics updates. The only worse commonly available refresh - // would be 85, requiring CONTROL_STEPS = 17. - static const int CONTROL_STEPS = 12; - - // sum of physics steps done over the last (i+1) frames - int accumulated_physics_steps[CONTROL_STEPS]; - - // typical value for accumulated_physics_steps[i] is either this or this plus one - int typical_physics_steps[CONTROL_STEPS]; - - int fixed_fps; - -protected: - // returns the fraction of p_frame_slice required for the timer to overshoot - // before advance_core considers changing the physics_steps return from - // the typical values as defined by typical_physics_steps - float get_physics_jitter_fix(); - - // gets our best bet for the average number of physics steps per render frame - // return value: number of frames back this data is consistent - int get_average_physics_steps(float &p_min, float &p_max); - - // advance physics clock by p_idle_step, return appropriate number of steps to simulate - MainFrameTime advance_core(float p_frame_slice, int p_iterations_per_second, float p_idle_step); - - // calls advance_core, keeps track of deficit it adds to animaption_step, make sure the deficit sum stays close to zero - MainFrameTime advance_checked(float p_frame_slice, int p_iterations_per_second, float p_idle_step); - - // determine wall clock step since last iteration - float get_cpu_idle_step(); - -public: - MainTimerSync(); - - // start the clock - void init(uint64_t p_cpu_ticks_usec); - // set measured wall clock time - void set_cpu_ticks_usec(uint64_t p_cpu_ticks_usec); - //set fixed fps - void set_fixed_fps(int p_fixed_fps); - - // advance one frame, return timesteps to take - MainFrameTime advance(float p_frame_slice, int p_iterations_per_second); -}; - -#endif // TIMER_SYNC_H |