Get Deformed Points from Skin Deformer
bentraje last edited by
I'm trying to get the deformed points from an object with a skin deformer using this code.
The code above is different from just the
GetPointonly but it does not correspond with the world position.
You can see the illustration of the problem here:
There are existing threads, but for some reason, the answers are not conclusive:
Is there a way around this?
Thank you for looking at my problem
m_magalhaes last edited by
The points are stored in a local space (local coordinates). To get the global space (world coordinates) you have to multiply by the object's matrix.
To go from global to local, just multiply by the invert matrix
#Retrieves the active Object node = doc.GetActiveObject() if node == None: raise ValueError ("there's no object selected") #Retrieves the deformed cache cache = node.GetDeformCache() if cache == None: raise ValueError("no cache found") #Retrieves All points points = cache.GetAllPoints() #Retrieves the object Matrix to go from Object to world coordinates(local to global) opMg = node.GetMg() # Prints out points in local coordinates. print points # Transforms points to global coordinates points = [p * opMg for p in points] # Prints points in global coordinates. print points # Global to local # Retrieves the inverse Matrix of the object with ~ invOpMg = ~opMg # Multiplies each point by the inverse matrix points = [p * invOpMg for p in points] print points
bentraje last edited by bentraje
Thank you for the explanation:
"The points are stored in a local space (local coordinates)."
Printing the three version of points space was really helpful
The code works as expected! :)