Update of /project/mcclim/cvsroot/mcclim/Backends/PostScript In directory common-lisp.net:/tmp/cvs-serv21672

Modified Files: graphics.lisp Log Message: Fix the sense of rotations in the Postscript backend, being more careful than in my mailed patch to handle NIL angles.

(When are we getting a test suite?)

Date: Mon Aug 1 18:50:44 2005 Author: crhodes

Index: mcclim/Backends/PostScript/graphics.lisp diff -u mcclim/Backends/PostScript/graphics.lisp:1.12 mcclim/Backends/PostScript/graphics.lisp:1.13 --- mcclim/Backends/PostScript/graphics.lisp:1.12 Fri Dec 3 12:42:43 2004 +++ mcclim/Backends/PostScript/graphics.lisp Mon Aug 1 18:50:43 2005 @@ -147,8 +147,15 @@ (cy (point-y center)) (tr (make-transformation ndx2 ndx1 ndy2 ndy1 cx cy)) (circle (untransform-region tr ellipse)) - (start-angle (or (ellipse-start-angle circle) 0)) - (end-angle (or (ellipse-end-angle circle) (* 2 pi)))) + ;; we need an extra minus sign because the rotation + ;; convention for Postscript differs in chirality from the + ;; abstract CLIM convention; we do a reflection + ;; transformation to move the coordinates to the right + ;; handedness, but then the sense of positive rotation is + ;; backwards, so we need this reflection for angles. -- + ;; CSR, 2005-08-01 + (start-angle (- (or (ellipse-end-angle circle) 0))) + (end-angle (- (or (ellipse-start-angle circle) (* -2 pi))))) (write-string (if filled "true " "false ") stream) (write-angle stream (if (< end-angle start-angle) (+ end-angle (* 2 pi))