How to read object placement angle

[freedman]

My goal is to rotate an object a certain amount but first I need to read it's current angle so I can add to it. I have done this:

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Ang = App.ActiveDocument.Body001.Placement
print(Ang)

and get a print out:

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Placement[Pos=(0,0,0), Yaw-Pitch-Roll=(14,0,0)]

The angle is 14 degrees but how do access that variable (Yaw).
It comes down to how do I read this, the rot.angle:
"doc.getObject(self.partName).Placement = App.Placement(App.Vector(self.obj_x,self.obj_y,0.0),App.Rotation(App.Vector(0,0,0), self.rot_angle))
Thanks

[openBrain]

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App.ActiveDocument.Body001.Placement.Rotation.Angle

for Angle/Axis representation

If you want eg. Euler's yaw :

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App.ActiveDocument.Body001.Placement.Rotation.toEuler()[0]

[freedman]

openBrain, I had the "Rotation.Angle" printed and got .244346095279, the Euler is what I needed, it prints out at 14.0. Thank you.

I was trying to get that info from this long thread about angles but that's a tough read at midnight.
https://forum.freecadweb.org/viewtopic. ... read+angle
Thanks again.

[vocx]

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Placement[Pos=(0,0,0), Yaw-Pitch-Roll=(14,0,0)]

Placement. It's a bit old, but it should be helpful.

A Placement is composed of a Base, and a Rotation.

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Placement = App.Placement(Base, Rotation)

The Base is a simple point (Vector) indicating where the object is.

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Base = App.Vector(x, y, z)

The Rotation, is composed of an Axis (Vector) of rotation, and an Angle.

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Rotation = App.Rotation(App.Vector(x, y, z), Angle)

Once you have the Placement you can extract the components from the Python console.

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Placement.Base
Placement.Rotation
Placement.Rotation.Axis
Placement.Rotation.Angle

[freedman]

Thanks all, I think I understand. Good explaination vocx.

Placement. It's a bit old, but it should be helpful.

I looked at that a bunch and there are plenty of examples of how to write to placement but just a couple lines showing how to read the variables. I don't remember seeing the Eular stuff in there at all.

[mario52]

hi

see here Code_snippets#Search_and_data_extraction

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

# give the rotation of the object selected toEuler (angle rotation in degrees)
sel = FreeCADGui.Selection.getSelection()                             # select object with getSelection()
angle   = sel[0].Shape.Placement.Rotation.toEuler()                   # angle Euler
App.Console.PrintMessage("Angle          : "+str(angle)+"\n")
Yaw   = sel[0].Shape.Placement.Rotation.toEuler()[0]                  # decode angle Euler Yaw (Z) lacet (alpha)
App.Console.PrintMessage("Yaw            : "+str(Yaw)+"\n")
Pitch = sel[0].Shape.Placement.Rotation.toEuler()[1]                  # decode angle Euler Pitch (Y) tangage (beta)
App.Console.PrintMessage("Pitch          : "+str(Pitch)+"\n")
Roll  = sel[0].Shape.Placement.Rotation.toEuler()[2]                  # decode angle Euler Roll (X) roulis (gamma)
App.Console.PrintMessage("Roll           : "+str(Roll)+"\n\n")
##################################################################################

mario

[freedman]

Thanks Mario. It would be great if someone could add to the "Code snippets" how to read/write/search for linked objects and their params.

[mario52]

hi

give an example file to see ...

mario

[freedman]

This is a Part design file. The first Part is the original, the next two are links. Using 19.187

[openBrain]

This is a Part design file. The first Part is the original, the next two are links. Using 19.187

Dont' know exactly what you want but Links are listed in the InList property of an object :

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App.ActiveDocument.Part.InList

I don't know dedicated method to get only the list of Links pointing to an object but maybe there is one.
However there is one in the other direction :

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App.ActiveDocument.Link.getLinkedObject()