Modules reorganization

[dungeon-master.git] / dungeon-master / geom.scm

diff --git a/dungeon-master/geom.scm b/dungeon-master/geom.scm
deleted file mode 100644 (file)
index 466d369..0000000
--- a/dungeon-master/geom.scm
+++ /dev/null
@@ -1,37 +0,0 @@
-;;; Dungeon Master --- RPG Adventure Generator
-;;; Copyright © 2019 Javier Sancho <jsf@jsancho.org>
-;;;
-;;; Dungeon Master is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or
-;;; (at your option) any later version.
-;;;
-;;; Dungeon Master is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-;;; General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with Dungeon Master. If not, see <http://www.gnu.org/licenses/>.
-
-
-(define-module (dungeon-master geom)
-  #:use-module (dungeon-master geom point)
-  #:export (angle-sign))
-
-
-(define (angle-sign center a b)
-  "Return the sign of (- (atan (- a center))
-                         (atan (- b center)))"
-  (let ((x1 (- (point-x a) (point-x center)))
-        (y1 (- (point-y a) (point-y center)))
-        (x2 (- (point-x b) (point-x center)))
-        (y2 (- (point-y b) (point-y center))))
-    (cond ((and (>= x1 0) (< x2 0))
-             1)
-          ((and (>= x2 0) (< x1 0))
-             -1)
-          ((and (= x1 0) (= x2 0))
-           (if (> y2 y1) 1 -1))
-          (else
-           (if (> (- (* x2 y1) (* x1 y2)) 0) 1 -1)))))