Vector.angle_signed(other)
for 2D vectors to get the clockwise angle between them.
in BLI math its called - angle_signed_v2v2()
shorthand for...
atan2f((v1[1] * v2[0]) - (v1[0] * v2[1]), dot_v2v2(v1, v2))
also corrects compile error in last commit.
the problem was numeric precision when in ortho mode the start/end points for the view vector would be 2000 apart which caused trouble for the intersection test.
It was possible to allocate an array of size<2 which would then raise an error on vector creation without freeing.
Fix to ensure the behaviour of Vector.Range was the same as for builtin range() function. When specifying 3 arguments, the step argument wasn't being used to correctly calculate the vector size.
Minor formatting edits for error messages.
1) The width of columns was incorrectly determined on windows, fixed by increasing the size of the dummy buf.
2) Added additional brackets to string for consistent formatting
now you can still use column access
previously...
mat[2] = 1, 2, 3
needed to be converted into...
mat[0][2] = 1
mat[1][2] = 2
mat[2][2] = 3
but with column access you can do...
mat.col[2] = 1, 2, 3
Having 'row' attribute is a bit redundant since direct indexing on a matrix uses row but included for completeness.
this is a part of patch 29534, being applied separately
from patch [#29534] Change Matrix Representation and Access in Python to Conform with Standard Notation
by Andrew Hale (trumanblending)
* 1. Resize 4x4, code was ridiculously complex (cleanup only)
* 2. matrix * matrix checking for compatibility wasn't working right (bug in last release)
* 3. fix for result size for matrix * vector if matrix is 4x4 and vector size 3 (bug in recent patch)
* 4. fix for result size vector * matrix if matrix is 4x4 and vector size 3 (bug in recent patch)
also add an assert so invalid index access will raise an error in debug mode, without this it was quite easy to access invalid memory without meaning to.
no functional change.
patch http://codereview.appspot.com/5482043
from Andrew Hale
* Text from the submission *
This patch adds the ability to use arbitrary sized vectors from mathutils.
Currently vectors are only of size 2, 3 or 4 since they are generally restricted
to geometric applications. However, we can use arbitrary sized vectors for
efficient calculations and data manipulation.
