Changeset 13076 for trunk/psLib/src/math/psEllipse.c

Timestamp:

Apr 27, 2007, 3:31:42 PM (19 years ago)

Author:

magnier

Message:

fixed a sign error : double check the math on the polarization terms (currently consistent, but could be wrong)

File:

• trunk/psLib/src/math/psEllipse.c (modified) (1 diff)

trunk/psLib/src/math/psEllipse.c

@@ -35 +35 @@
     pol.e0 = r*(PS_SQR(shape.sx) + PS_SQR(shape.sy));
     pol.e1 = r*(PS_SQR(shape.sx) - PS_SQR(shape.sy));
-    pol.e2 = r*(2.0*PS_SQR(shape.sx)*PS_SQR(shape.sy)*shape.sxy);
+    // XXX I do not understand this negative sign
+    pol.e2 = -r*(2.0*PS_SQR(shape.sx)*PS_SQR(shape.sy)*shape.sxy);
 
     assert (isfinite(pol.e0));