Careless use of acos() in spherical coordinates transformation was
deteriorating the precision near zenith (and nadir) and producing
glitchy pixels (best seen in longer focal lengths).
Reviewed By: fclem
Differential Revision: https://developer.blender.org/D8266
Simply remove that check ob userdef's themes, we are never read any
userdef from startup file anymore, so this check makes no more sense.
To be backported to 2.83.
This commit adds a new read-only boolean property `Screen.is_scrubbing`.
The related property `Screen.is_animation_playing` is set to `True` in
two situations:
- Animation is actually playing (for example via the Play button in the
timeline)
- The user is scrubbing through time (in the timeline, dopesheet, graph
editor, etc.)
To distinguish between these two cases, the property
`Screen.is_scrubbing` has been added.
Concept approved by @brecht.
It was already possible to create Sound and Image strips that reference
non-existing files. Now it's also possible to create Movie strips
referencing missing files via the Python API call
`Sequences.new_movie()`. In this case, the duration of the strip will be
set to 1 frame.
Note that this commit does not change anything in the user interface.
The Python API of the `MovieStrip` class is extended with a function
`reload_if_needed()`. This function only performs disk I/O if the movie
strip cannot produce frames, that is either when its filepath points to
a non-existing file, or when the video sequence editor has not been
shown yet (for example because it is in an inactive workspace).
This allows for the following:
```
import bpy
scene = bpy.context.scene
vse = scene.sequence_editor_create()
filepath = bpy.path.abspath('//demo.mkv')
strip = vse.sequences.new_movie("movie", filepath,
channel=2,
frame_start=47,
file_must_exist=False)
strip.frame_final_end = 327
```
This will create a new movie strip, even when `demo.mkv` does not exist.
Once `demo.mkv` has appeared at the expected location, either
`strip.reload_if_needed()` or `strip.filepath = strip.filepath` will
load it.
Differential Revision: https://developer.blender.org/D8257
Reviewed By: Sergey, ISS
This function is more expansive than the simpler `rna_ensure_property()`
one, and should only be used when IDProperty data is actually needed.
If one only needs to ensure it has a valid PropertyRNA pointer,
`rna_ensure_property()` is much more efficient.
Also add compiler warnings when results of those functions are unused,
this should never be the case.
When using the sun, we need to sun sampling logic to avoid excessive
sampling map resolution, but that logic assumes that the Vector input
comes from the view direction.
That is the case in the vast majority of cases anyways, so the easiest
solution is to just remove the input for that case.
Differential Revision: https://developer.blender.org/D8091
For animation/driver purposes, being able to go outside of the 0-360
range makes things easier.
Differential Revision: https://developer.blender.org/D8091
The force node can now be used to control the behavior of particles.
Forces can access particles attributes. Currently, there are three attributes:
`Position` (vector), `Velocity` (vector) and `ID` (integer).
Supported nodes are: Math, Vector Math, Separate Vector, Combine Vector and Value.
Next, I'll have to split `simulation.cc` into multiple files and move
some stuff out of blenkernel into another folder.
Instead of using the mouse cursor position,
this selects between existing selected elements.
Access this since picking a selection path doesn't
work from the menu.
This is no longer used by default, when '--python-use-system-env' is set
there are many Python environment variables, don't list them in
Blender's help message.
