analysis: analysis::general_optics::simil_tens

def analysis.general_optics.simil_tens_cs	(	k,
		s,
		tens
	)

Definition at line 115 of file general_optics.py.

00115                              :
00116         "similarity transform a 2x2 tensor by angle k=cos(theta), s=sin(theta)."
00117         a,b,c,d=tens[0,0], tens[0,1], tens[1,0], tens[1,1]
00118         s2=s*s; k2=k*k; sk=s*k
00119         a1=a*k2+d*s2+sk*(b+c)
00120         b1=b*k2-c*s2+sk*(d-a)
00121         c1=c*k2-b*s2+sk*(d-a)
00122         d1=d*k2+a*s2-sk*(b+c)
00123         return Numeric.array(((a1,b1),(c1,d1)))
00124 
def simil_tens(theta, tens):