This aspect is actually utilized to avoid additional steps. Seems to work alright.
vectors2.dyn (16.3 KB)
vectors2.dyn (16.3 KB)
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Hello
An example with Cross Product
import sys
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
def uniqueVectors(lstVect, tolerance = 0.001):
if len(lstVect) > 0:
vectA =lstVect.pop(0)
otherV = []
for v in lstVect:
if abs(v.Cross(vectA).Z) > tolerance:
otherV.append(v)
return [vectA] + uniqueVectors(otherV)
else:
return []
OUT = uniqueVectors(IN[0]):o
I fed in my original lines and it works thanks! Can you explain what line 3 (red arrow) means please. I get it’s point at param but I don’t understand the range then -1 then the 0.1:
This only gives me an output of 2 vectors.
Could you give a brief explanation of your script pls?
I get the loops but I don’t understand how you decide what the tolerance is etc.
ok it’s fixed (in my preview post)
when 2 vectors are parallel to the Z component of the product Cross is equal to 0
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it is the tolerance for 2 vectors almost parallel (or not), you can replace by this
if abs(v.Cross(vectA).Z) != 0: for check 2 vectors are strictly no parallel
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Ah, I suppose that with Revit tolerance is a good idea?
Any idea where the sweet spot is?
it will depend on your context (need more or less precision)
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Line 3 is an extension of Line 2. The -1 and 0.1 are parameters for Flatten and Prune respectively.
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when the dot product of two vectors is -1 or 1 the vectors should be parallel - this is likely faster than the cross product … but I have not tested it.
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