Blender Git Commit Log

Adding a readonly length_squared property to mathutils.Vector. This is simply vector.dot(vector), so nothing new is really added, but it's nice for writing more intent revealing code. In other words:

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).