Timer python

Hi,

How to change this python script, that every time I change base - point, the script updates itself?

Is it possible to do this without grasshopper timer, using Rhino EditPythonScript

Python script:

#############

import rhinoscriptsyntax as rs

def vectorField():
    cloud_id = rs.GetObject("Input pointcloud", 2, True, True)
    if cloud_id is None: return

    listpoints = rs.PointCloudPoints(cloud_id)
    base_point = rs.GetPoint("Vector field base point")
    if base_point is None: return

    for point in listpoints:
        vecbase = rs.VectorCreate(point, base_point)
        vecdir = rs.VectorCrossProduct(vecbase, (0,0,1) )

        if vecdir:
            vecdir = rs.VectorUnitize(vecdir)
            vecdir = rs.VectorScale(vecdir, 2.0)
            AddVector(vecdir, point)

def AddVector(vecdir, point):
    tip_point = rs.PointAdd(point, vecdir)
    line = rs.AddLine(point, tip_point)
    if line: return rs.CurveArrows(line,2)

vectorField()

#############

Below screenshot is attached

Attachments:

printscreen.png, 47 KB

Replies to This Discussion

Permalink Reply by Giulio Piacentino on January 7, 2015 at 8:39am

Hi Petras

are you looking for something similar to this?

The only main difference from your script is that, unfortunately, arrowheads are not currently supported in Grasshopper, but we could apply them once we bake the lines into Rhino. Or we could draw them with tiny surfaces, lines or meshes.

Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Attachments:

pts.gh, 8 KB

Permalink Reply by Petras Vestartas on January 7, 2015 at 9:18am

Thanks, that was what I am looking for:)

But is that possible in python, without using grasshopper?

I mean, executing the code not once but constantly updating, like in processing?

Permalink Reply by Giulio Piacentino on January 7, 2015 at 10:03am

It is "possible", but it is much much easier using Grasshopper and Python together. One way that I can think of, would be handling a display draw event from the use of a GetPoint instance on the commandline. But really,... why do you need to make that complicated?

If you absolutely have to, the right place to ask would be the Rhino forum, scripting category.

I hope this helps,

Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

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