CPUParticles2D with Align Y turned on would update particles' transforms based on the velocity when velocity was non-zero, but would not set the transform for zero velocity. This left the transfrom value from the previous call, which may have already been scaled. In this case, each call to _particles_process would apply the scale again, causing the particle to repeatedly grow (or shrink for scales < 1.0).
Updated the Align Y logic to always normalize the transform values before scale is applied.
Allows a non-interpolated particle system to closely follow an interpolated target without tracking ahead of the target, by performing fixed timestep interpolation on the particle system global transform, and using this for emission.
Co-authored-by: lawnjelly <lawnjelly@gmail.com>
Issue #56324 notes that you may can't set the damping property of
CPUParticles2D to anything more that 100 in the editor inspector
while you may set it to anything in code, this is considered a bug and
changed in this commit
As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.
It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).
We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).
Also fixed "cf." Frenchism - it's meant as "refer to / see".
Values above 1.0 (or below 0.0) are no longer allowed, as these make
no visual difference whatsoever (and may cause particles not to appear
at all if looping is disabled).
"less" should be used for quantity, rather than "lesser".
Existing scripts that use `or_lesser` in `_get_property_list()`
will need to be updated to account for this change.
Affects a lot of classes. Very thoroughly checked signal connections and deferred calls to this method, add_do_method/add_undo_method calls, and so on.
Also renames the internal `_update_callback()` to `_redraw_callback()` for consistency.
Just a few comments have also been changed to say "redraw".
In CPUParticles2D, there was a private variable with the same name. It has been renamed to `do_redraw`.
