Commit graph

17 commits

Author SHA1 Message Date
Manuel Moos
d5abd4eb75 Add hysteresis to physics timestep count per frame
Add new class _TimerSync to manage timestep calculations.
The new class handles the decisions about simulation progression
previously handled by main::iteration(). It is fed the current timer
ticks and determines how many physics updates are to be run and what
the delta argument to the _process() functions should be.

The new class tries to keep the number of physics updates per frame as
constant as possible from frame to frame. Ideally, it would be N steps
every render frame, but even with perfectly regular rendering, the
general case is that N or N+1 steps are required per frame, for some
fixed N. The best guess for N is stored in typical_physics_steps.

When determining the number of steps to take, no restrictions are
imposed between the choice of typical_physics_steps and
typical_physics_steps+1 steps. Should more or less steps than that be
required, the accumulated remaining time (as before, stored in
time_accum) needs to surpass its boundaries by some minimal threshold.
Once surpassed, typical_physics_steps is updated to allow the new step
count for future updates.

Care is taken that the modified calculation of the number of physics
steps is not observable from game code that only checks the delta
parameters to the _process and _physics_process functions; in addition
to modifying the number of steps, the _process argument is modified as
well to stay in expected bounds. Extra care is taken that the accumulated
steps still sum up to roughly the real elapsed time, up to a maximum
tolerated difference.

To allow the hysteresis code to work correctly on higher refresh
monitors, the number of typical physics steps is not only recorded and
kept consistent for single render frames, but for groups of them.
Currently, up to 12 frames are grouped that way.

The engine parameter physics_jitter_fix controls both the maximum
tolerated difference between wall clock time and summed up _process
arguments and the threshold for changing typical_physics_steps. It is
given in units of the real physics frame slice 1/physics_fps. Set
physics_jitter_fix to 0 to disable the effects of the new code here.
It starts to be effective against the random physics jitter at around
0.02 to 0.05. at values greater than 1 it starts having ill effects on
the engine's ability to react sensibly to dropped frames and framerate
changes.
2018-04-09 22:27:29 +02:00
Rémi Verschelde
e4213e66b2 Add missing copyright headers and fix formatting
Using `misc/scripts/fix_headers.py` on all Godot files.
Some missing header guards were added, and the header inclusion order
was fixed in the Bullet module.
2018-01-05 01:22:23 +01:00
Rémi Verschelde
b50a9114b1 Update copyright statements to 2018
Happy new year to the wonderful Godot community!
2018-01-01 14:40:47 +01:00
Rémi Verschelde
3fd23da5ee Rename the version's "revision" to "build"
That "revision" was inherited from SVN days but had been since then
used to give information about the build: "custom_build", "official",
"<some distro's build>".

It can now be overridden with the BUILD_NAME environment variable.
2017-11-20 00:51:14 +01:00
Rémi Verschelde
6947bed015 Pass engine name and version parts as proper strings
Removes the need for _MKSTR all over the place which has the drawback of
converting _MKSTR(UNKNOWN_DEFINE) to "UKNOWN_DEFINE" instead of throwing
a compilation error.
2017-11-20 00:51:14 +01:00
Leon Krause
acb23adad3 Fail when attempting to retrieve a non-existent singleton 2017-11-14 16:15:00 +01:00
Leon Krause
9b7b46143d Move singleton management from ProjectSettings to Engine 2017-11-14 15:15:13 +01:00
AndreaCatania
4537977d6d Renamed fixed_process to physics_process 2017-09-30 16:19:07 +02:00
Rémi Verschelde
bd282ff43f Use HTTPS URL for Godot's website in the headers 2017-08-27 14:16:55 +02:00
Ignacio Etcheverry
fd69604bd9 Adds editor_hint to Engine class 2017-08-19 01:03:12 +02:00
Juan Linietsky
2e73be99d8 Lots of work on Audio & Physics engine:
-Added new 3D stream player node
-Added ability for Area to capture sound from streams
-Added small features in physics to be able to properly guess distance to areas for sound
-Fixed 3D CollisionObject so shapes are added the same as in 2D, directly from children
-Fixed KinematicBody API to make it the same as 2D.
2017-07-15 08:32:34 -03:00
Poommetee Ketson
5a9eb5ef58 Include Git hash in the engine 2017-07-11 15:57:52 +07:00
Rémi Verschelde
df61dc4b2b Add "Godot Engine contributors" copyright line 2017-04-08 00:11:42 +02:00
Rémi Verschelde
5dbf1809c6 A Whole New World (clang-format edition)
I can show you the code
Pretty, with proper whitespace
Tell me, coder, now when did
You last write readable code?

I can open your eyes
Make you see your bad indent
Force you to respect the style
The core devs agreed upon

A whole new world
A new fantastic code format
A de facto standard
With some sugar
Enforced with clang-format

A whole new world
A dazzling style we all dreamed of
And when we read it through
It's crystal clear
That now we're in a whole new world of code
2017-03-05 16:44:50 +01:00
Rémi Verschelde
3890256fc5 Style: Cleanups, added headers, renamed files
Made sure files in core/ and tools/ have a proper Godot license header
when written by us. Also renamed aabb.{cpp,h} and object_type_db.{cpp,h}
to rect3.{cpp,h} and class_db.{cpp,h} respectively.

Also added a proper header to core/io/base64.{c,h} after clarifying
the licensing with the original author (public domain).
2017-01-16 08:04:23 +01:00
Rémi Verschelde
d2aae675e9 Replace Engine version API by preexisting OS one
It outputs a single Dictionary with all relevant information as
keys, that will less bloat the documentation and provide all details
in one function call.
2017-01-13 18:25:49 +01:00
Juan Linietsky
e53c247cb1 Created new Engine singleton, and moved engine related OS functions to it. 2017-01-13 12:51:14 -03:00