[SOLVED]How to get the coordinates of a point at the Global Coordinate System ?

[manos]

Hello
The following code gives the coordinates of a selected point.

Code: Select all

o =FreeCADGui.Selection.getSelectionEx()[0].SubObjects[i]
	ap1=[o.X,o.Y,o.Z,1]

But unfortunately these are coordinates of Local Coor. System.
So the question of the day: How can I get the coordinates of a selected point at the Global Coordinate System ?

[Chris_G]

Code: Select all

sel = FreeCADGui.Selection.getSelectionEx()[0]
obj = sel.Object
sub = sel.SubObjects[0]
if hasattr(obj, "getGlobalPlacement"):
    gpl = obj.getGlobalPlacement()
    sub.transformShape(gpl.Matrix)

[manos]

Code: Select all

sel = FreeCADGui.Selection.getSelectionEx()[0]
obj = sel.Object
sub = sel.SubObjects[0]
if hasattr(obj, "getGlobalPlacement"):
    gpl = obj.getGlobalPlacement()
    sub.transformShape(gpl.Matrix)
    
print(' gpl=',gpl)

I got this answer: " gpl= Placement [Pos=(0,0,0), Yaw-Pitch-Roll=(0,0,0)]"

Thanks so much Chris_G but it is not the placement parameters I look for.
Ideally coordinates like those at preselection panel would be my best.
Any help ? Any merciful human being?

[Chris_G]

If I select a vertex of your box example, I get the global coordinates :

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sel = FreeCADGui.Selection.getSelectionEx()[0]
obj = sel.Object
sub = sel.SubObjects[0]

print(sub.Point)
# >>> Vector (10.0, 0.0, 10.0) = Local Coordinate System

if hasattr(obj, "getGlobalPlacement"):
    gpl = obj.getGlobalPlacement()
    sub.transformShape(gpl.Matrix)

print(sub.Point)
# >>> Vector (11.198563820557883, -2.9883623873011977, 17.03744871391589) = Global Coordinate System

[openBrain]

The best I know that also support Links is :

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sel = Gui.Selection.getSelectionEx('',0)[0]
obj = sel.Object
subobj = sel.SubElementNames[0]
coord = obj.getSubObject(subobj).Point

App.Console.PrintWarning(f"Global coordinates of {subobj} : {coord}\n")

[manos]

Splendid @Chris_G.
Thanks again.

[manos]

Thanks @openBrain.
I will try it.

[edwilliams16]

Just to clarify. If you use @Chris_G 's code on a vertex of a linked object, you'll get the global coordinates of the original, not the link. With @openBrain 's code you'll get the global coordinates of the linked object's vertex that you selected. This is all moot if you don't use links. Try it on the enclosed file.

To get the global placement of a selected linked object, you can use

Code: Select all

for sel in Gui.Selection.getSelectionEx('',0):
  for path in sel.SubElementNames if sel.SubElementNames else ['']:
    placement = sel.Object.getSubObject(path, retType=3) # retType 3 returns the placement. Check the doc string for more info
    print('%s.%s -- %s' % (sel.Object.Name, path, placement))

[galou_breizh]

Macro GetGlobalPlacement.