Macro Make Arc 3 Points
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| Description |
|---|
| Creates a arc from 3 selected points. Macro version: 02.00 Last modified: 2019-07-29 FreeCAD version: All Download: ToolBar Icon Author: Mario52 |
| Author |
| Mario52 |
| Download |
| ToolBar Icon |
| Links |
| Macros recipes How to install macros How to customize toolbars |
| Macro Version |
| 02.00 |
| Date last modified |
| 2019-07-29 |
| FreeCAD Version(s) |
| All |
| Default shortcut |
| None |
| See also |
| None |
Description
This macro creates a arc on 3 selected points.
Usage
Launch the macro, select 3 points, the arc is created and the coordinates and the length of the arc are displayed in the report view.
(PS: It is not required to hold down the Ctrl key)
Script
The icon for the toolBar 
Macro_Make_Arc_3_Points.FCMacro
# -*- coding: utf-8 -*-
from FreeCAD import Base
__title__ = "Macro_Make_Arc_3_points"
__author__ = "Mario52"
__url__ = "http://www.freecadweb.org/index-fr.html"
__version__ = "00.02"
__date__ = "29/07/2019"
global selected; selected = []
App = FreeCAD
class SelObserver:
print( "Create Arc to 3 points ...")
def addSelection(self,doc,obj,sub,pnt): # Selection
global selected
selected.append(pnt)
if len(selected) == 1:
print( "Point 1 : ",FreeCAD.Vector(selected[0]))
elif len(selected) == 2:
print( "Point 2 : ",FreeCAD.Vector(selected[1]))
elif len(selected) == 3:
print( "Point 3 : ",FreeCAD.Vector(selected[2]))
try:
C1 = Part.Arc(FreeCAD.Vector(selected[0]),FreeCAD.Vector(selected[1]),FreeCAD.Vector(selected[2]))
S1 = Part.Shape([C1])
W = Part.Wire(S1.Edges)
Part.show(W)
App.ActiveDocument.ActiveObject.Label = "Arc_3_Points"
print( "Length : ",W.Length)
except Exception:
print( "Three points are collinear or bad selection")
del selected[:]
FreeCADGui.Selection.removeObserver(s)
print( "End Make_Arc_3_Points")
print( "_____________________")
s=SelObserver()
FreeCADGui.Selection.addObserver(s)