Get Grow function

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Old 03 March 2013   #1
Get Grow function

Hi everyone,

I'm currently working on a script, where each vertex of a selected object are running in a for loop to calculate their Normal vector. I would like to get the surrounding vertex to calculate the distance between the vertex of the loop and the surrounding ( it's the easiest way i found to get the polygon density locally).

Here is a piece of the script :

Code:
-- xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx objetSourcePoly = $ objetSource = snapshotasmesh$ model = #($Brush_01,$Brush_02,$Brush_03,$Brush_04) for vertIndex = 1 to objetSource.numverts do ( vertFaces = meshop.getFacesUsingVert objetSource vertIndex vertNorm = point3 0 0 0 for face = 1 to vertFaces.count do ( if vertFaces[face] then ( faceNormal = getFaceNormal objetSource face vertNorm = vertNorm + faceNormal ) vertNorm = normalize vertNorm ) r = random 1 (model.count) localModel = instance model[r] localModel.dir = vertNorm in coordsys local rotate localModel (angleaxis -90 [0,1,0]) localModel.pos = getVert objetSource vertIndex -- I need to select the vertex "vertIndex" in the Poly object VertPoly = polyop.setVertSelection objetSourcePoly vertIndex objetSourcePoly.EditablePoly.SetSelection #Vertex #{vertIndex} -- Then grow the selection VertAround = objetSourcePoly.EditablePoly.GrowSelection () -- Finaly delete from selection the "VertIndex" to get only the surrounding vertex AroundVertPoly = AroundVertPoly - VertPoly -- After that i need a for loop for each surrounding vertex to calculate distance between each of them and the "vertIndex" )



I hope you'll be able to help me, i think i just missed an easy part to call the Grow button in the command panel, or an other function

Thank you
 
Old 03 March 2013   #2
I found an other way to do it, slower but it works

Code:
vertDistanceArray = #() --create an empty array for distance for i = 1 to objetSource.numVerts do ( vertDistanceArray[i] = distance (getVert objetSource i) (getVert objetSource vertIndex) ) --till here, the distance of all the vertices has been stored in the array. vertDistanceArray = sort vertDistanceArray -- Calculate the medium lenght VertDistance = vertDistanceArray[2] + vertDistanceArray[3] + vertDistanceArray[4] + vertDistanceArray[5] + vertDistanceArray[6] VertMoy = VertDistance / 5
 
Old 04 April 2013   #3
everything is much easier... because you already have a snapshot mesh (i will call it mesh in my sample) the neighbors of a vertex (v) are:
by edges:
Code:
(meshop.getvertsusingedge mesh (meshop.getedgesusingvert mesh v)) - #{v}

by faces:
Code:
(meshop.getvertsusingface mesh (meshop.getfacesusingvert mesh v)) - #{v}


ps. polyop.getfacenormal is much faster then getfacenormal (mesh method)

Last edited by denisT : 04 April 2013 at 10:32 AM.
 
Old 04 April 2013   #4
btw... who can show the fastest way how to get all neighbors of every mesh vertex?
 
Old 04 April 2013   #5
Thank you, i was sure there was an other way to write it faster. Testing it
 
Old 04 April 2013   #6
Quote:
Originally Posted by GreySize
Thank you, i was sure there was an other way to write it faster. Testing it

if you need to compute all vertices the way that i showed above is not fastest.
 
Old 04 April 2013   #7
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