gtTwinTest : add angle calculation between grains using atan2 function

Signed-off-by: Laura Nervo <laura.nervo@esrf.fr>

git-svn-id: https://svn.code.sf.net/p/dct/code/trunk@802 4c865b51-4357-4376-afb4-474e03ccb993

zUtil_Twins/gtTwinTest.m

@@ -129,6 +129,8 @@ hkil(4)   = hkil(4) / (1/parameters.cryst(phaseid).latticepar(3));
 out.mis_axis_hex = hkil;
 out.sym          = sym;
 
+out.angle = rad2deg(atan2(norm(cross(R1,R2)), dot(R1,R2)));
+
 
 out.center1 = grain{grain1}.center/pxsize;
 out.center2 = grain{grain2}.center/pxsize;