intersezione fra rette

[calculon]

Ciao a tutti, qualcuno ha elaborato uno script per rilevare le coordinate esatte in cui due rette si intersecano?
un'altra richiesta: esiste un comando python per valutare se un punto appartiene ad una retta?
grazie mille!

[renatorivo]

Ciao.
La soluzione per lo script sembra essere in questi due post:
https://forum.freecadweb.org/viewtopic.php?t=26650
https://forum.freecadweb.org/viewtopic.php?t=19698
io però n Windows ottengo sempre un errore 'DraftGeomUtils' is not defined anche con FreeCAD 0.19
non ho ancora provato in Ubuntu.
Puoi vedere altri post in inglese cercando con Script intersection

[mario52]

saluti

prova cosi:

seleziona le due linee

Code: Select all

import DraftGeomUtils
sel=Gui.Selection.getSelection()
print(DraftGeomUtils.findIntersection(sel[0].Shape.Edges[0],sel[1].Shape.Edges[0]))

intersection between two lines
mario

[renatorivo]

Grazie Mario, funziona:

Code: Select all

pl = FreeCAD.Placement()
>>> pl.Rotation.Q = (0.0,0.0,0.0,1.0)
>>> pl.Base = FreeCAD.Vector(0.0,0.0,0.0)
>>> points = [FreeCAD.Vector(0.0,0.0,0.0),FreeCAD.Vector(0.0,-40.0,0.0)]
>>> line = Draft.makeWire(points,placement=pl,closed=False,face=True,support=None)
>>> Draft.autogroup(line)
>>> pl = FreeCAD.Placement()
>>> pl.Rotation.Q = (0.0,0.0,0.0,1.0)
>>> pl.Base = FreeCAD.Vector(-20.0,-20.0,0.0)
>>> points = [FreeCAD.Vector(-20.0,-20.0,0.0),FreeCAD.Vector(20.0,-20.0,0.0)]
>>> line = Draft.makeWire(points,placement=pl,closed=False,face=True,support=None)
>>> Draft.autogroup(line)
>>> import DraftGeomUtils
>>> sel=Gui.Selection.getSelection()
>>> print(DraftGeomUtils.findIntersection(sel[0].Shape.Edges[0],sel[1].Shape.Edges[0]))
[Vector (0.0, -20.0, 0.0)]
>>> 

OS: Windows 8.1
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.16117 (Git)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: dbb4cc6415bac848a294f03b80f65e888d531742
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Italian/Italy (it_IT)