scalefactor = scaledextent / divisor
active.ScaleFactor = scalefactor
return
+
+def GetSliceOrigins(obj, nbSlices, normal):
+ """
+ Compute all origin points for the position of the slices.
+ @param normal is a list of 3 floats either 0 or 1 indicating the normal vector of the slices
+ """
+ from math import sqrt
+ bb = obj.GetDataInformation().GetBounds()
+ bb = zip(bb[::2], bb[1::2])
+ origin = [x[0] + 0.5*(x[1]-x[0]) for x in bb]
+ deltas = [x[1]-x[0] for x in bb]
+ # Compute extent of slices:
+ l = [normal[i]*deltas[i]**2 for i in range(3)] # either the X extend, or the XY diagonal, or the XYZ diagonal
+ plus = lambda x,y: x+y
+ extent = sqrt(reduce(plus, l, 0.0))
+ norm = sqrt(reduce(plus, normal, 0.0))
+ normal = [normal[i]/norm for i in range(3)]
+ origins = []
+ step = extent/nbSlices
+ for j in range(nbSlices):
+ orig_j = [origin[i]+normal[i]*(-0.5*extent + step*(0.5+j)) for i in range(3)]
+ origins.append(orig_j)
+ return origins
+
