Macro Draft Circle 3 Points: Difference between revisions
Renatorivo (talk | contribs) (languages it) |
Renatorivo (talk | contribs) (languages fr) |
||
Line 97: | Line 97: | ||
<br> |
<br> |
||
{{languages |
{{languages | {{fr|Macro_Draft_Circle_3_Points/fr}} {{it|Macro_Draft_Circle_3_Points/it}} }} |
Revision as of 21:08, 14 March 2013
File:Macro Draft Circle 3 Points Macro_Draft_Circle_3_Points |
Description |
---|
Creates a circle from 3 selected points. Author: Mario52 |
Author |
Mario52 |
Download |
None |
Links |
Macros recipes How to install macros How to customize toolbars |
Macro Version |
1.0 |
Date last modified |
None |
FreeCAD Version(s) |
None |
Default shortcut |
None |
See also |
None |
Description
This macro creates a circle on 3 selected points. The points can be objects such as cubes, cylinder, then selected coordinates will be the centre of these forms.
Use
Select 3 points, or forms in the 3D view and run the macro.
If the shape is a line, the coordinate will be the center of the line.
Options
If the selected objects are on different planes, (xy Z10, xy Z2, xy Z5) the circle will be built on the map x,y Z=0.
If all of the selected objects have their equal Z coordinates (xy Z5, xy Z5, xy Z5), circle will be built to the plan x,y Z=5.
Script
Draft_Circle_3_Points.FCMacro
# -*- coding: utf-8 -*- # créer un cercle à partir de 3 points sélectionnés sur le plan X,Y # 04/03/2013 # la formule provient de # http://www-obs.univ-lyon1.fr/labo/fc/Ateliers_archives/ateliers_2005-06/cercle_3pts.pdf # lire la note dans le pdf, sur l'ordre de sélection des points, # si la formule renvoie une erreur (exemple les 3 points dans le même alignement) # import Draft, Part, FreeCAD, math, PartGui, FreeCADGui from math import sqrt, pi, sin, cos from FreeCAD import Base # prendre les objets sélectionnés sel = FreeCADGui.Selection.getSelection() i=0 centreX=0 centreY=0 rayon=0 # S'il y a 3 points sélectionnés alors.. if len(sel)==3 : i=0 ta=[0,0,0,0,0,0,0,0,0] for obj in sel: x=(obj.Shape.BoundBox.Center) ta[i+0]=(x.x) ta[i+1]=(x.y) ta[i+2]=(x.z) i=i+3 # Affectation des variables x_point_1=ta[0] y_point_1=ta[1] z_point_1=ta[2] x_point_2=ta[3] y_point_2=ta[4] z_point_2=ta[5] x_point_3=ta[6] y_point_3=ta[7] z_point_3=ta[8] # Calcul des coordonnées du centre du cercle centreX =((x_point_3**2-x_point_2**2+y_point_3**2-y_point_2**2)/(2*(y_point_3-y_point_2))-(x_point_2**2-x_point_1**2+y_point_2**2-y_point_1**2)/(2*(y_point_2-y_point_1)))/((x_point_3-x_point_2)/(y_point_3-y_point_2)-(x_point_2-x_point_1)/(y_point_2-y_point_1)) centreY =-(x_point_2-x_point_1)/(y_point_2-y_point_1)*centreX+(x_point_2**2-x_point_1**2+y_point_2**2-y_point_1**2)/(2*(y_point_2-y_point_1)) rayon =sqrt((x_point_1-centreX)**2+(y_point_1-centreY)**2) # Définition de la coordonnée Z # Si toutes les coordonnées Z sont égales le centreZ s'aligne à la coordonnée Z if z_point_1==z_point_2 and z_point_2==z_point_3: centreZ=z_point_1 else: # Si une coordonnée est différente alors Z=0 centreZ=0 # Création du cercle pl=FreeCAD.Placement() pl.Rotation.Q=(0.0,-0.0,-0.0,1.0) pl.Base=FreeCAD.Vector(centreX,centreY,centreZ) Draft.makeCircle((rayon),placement=pl,face=False,support=None) # Affiche le résultat dans la Vue rapport de FreeCAD FreeCAD.Console.PrintMessage("Coordonnée X : "+str(centreX)+"\r\n") FreeCAD.Console.PrintMessage("Coordonnée Y : "+str(centreY)+"\r\n") FreeCAD.Console.PrintMessage("Coordonnée Z : "+str(centreZ)+"\r\n") FreeCAD.Console.PrintMessage("Rayon : "+str(rayon )+"\r\n") else: # Si la condition n'est pas remplie, recommencer FreeCAD.Console.PrintError("Sélectionnez 3 points et recommencez\r\n")
Credits
The genesis of the macro Draft_Circle_3_Points on the forum (PYTHON) coordonnées d'un point helped flachyjoe thanks.
The formula comes from cercle_3pts.pdf and used with the kind permission of its author.