if vec.dot(vec) > some_distance*some_distance:
do_something()
might not be quite as obvious looking as:
if vec.length_squared > some_distance*some_distance:
do_something()
As to why you'd want to use length_squared over length is that length uses a square root, which isn't always necessary for simple distance checks (e.g., closest object, checks like the ones above, ect).
existing check for driver to use GIL was not thread safe and could cause, details in the report.
This bug was caused by a check to avoid hanging, a fix for [#27683] that worked in 2.4x because the UI didn't use python to draw while rendering.
Apply a different fix for [#27683], when calling an operator, call PyEval_SaveThread(), then PyEval_RestoreThread() so the GIL can be aquired by threads started by the operator - in this case bake starting a thread that evaluates drivers.
vector * matrix
vector *= matrix
vector * quaternion
vector *= quaternion
Use the reverse order instead, enable WITH_ASSERT_ABORT in cmake to promote the warnings into errors.
[#28032] Python Mathutils: Matrix Multiplication Error
Since they ended up reversing the order we better keep old code unless its proven to be incorrect.
also change Matrix.__repr__ function args to evaluate correctly (need to be inside a tuple).
- add back slicing for buffers, (was previously in 2.4x but not working in py3):
buf = bgl.Buffer(...)
ls = buf[:]
- fix for crash with negative index access not being clamped.
- improve repr() function for multi dimensional buffers.
- add back 'list' attribute, but print deprecation warning.
- use getset rather then getattr
- remove verbose Buffer docstring, better use sphinx docs for this
- replace bge.Buffer with the Buffer class and add a __new__ function to the class so it can be called.
- improve error messages
- comment/remove assignments from values to themselves.
- add case break statements (no functional change but some source code checkers notice).
- fix python errors when the sculpt brush is None.
lambda_cp_line --> line_point_factor_v3
lambda_cp_line2 --> line_point_factor_v2
correction to previous commit function name
isect_seg_sphere_v3 --> isect_line_sphere_v3
... since its not clipped.
added a clip argument to the python version of the function.
Note for VS2008 plus CMake users:
I had to remove OpenEXR debug libs from the "blender" project properties >
Linker > Additional Dependencies. Otherwise I got a number of linker errors
concerning duplicated symbols between libcmt.lib and libcmtd.lib.
Python:
* adds bpy.app.handlers which contains lists, each for an event type:
render_pre, render_post, load_pre, load_post, save_pre, save_post
* each list item needs to be a callable object which takes 1 argument (the ID).
* callbacks are cleared on file load.
Example:
def MyFunc(scene): print("Callback:", data)
bpy.app.handlers.render_post.append(MyFunc)
C:
* This patch adds a generic C callback api which is currently only used by python.
* Unlike python callbacks these are not cleared on file load.
