X-Git-Url: https://git.jsancho.org/?p=dungeon-master.git;a=blobdiff_plain;f=dungeon-master%2Fgeom%2Ftriangle.scm;fp=dungeon-master%2Fgeom%2Ftriangle.scm;h=0000000000000000000000000000000000000000;hp=6f7ccf8634bd6032a83219de46d3bf0912a9229d;hb=8f36ecdca1766ddd2a177fa46dc885c7f8e14130;hpb=4fce641cc077d18f972e250d2fe3be5067618127

diff --git a/dungeon-master/geom/triangle.scm b/dungeon-master/geom/triangle.scm
deleted file mode 100644
index 6f7ccf8..0000000
--- a/dungeon-master/geom/triangle.scm
+++ /dev/null
@@ -1,77 +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 triangle)
-  #:use-module (ice-9 receive)
-  #:use-module (srfi srfi-9)
-  #:use-module (dungeon-master geom point)
-  #:export (make-triangle
-            triangle?
-            triangle-points
-            triangle-center
-            triangle-radius
-            triangle-has-edge))
-
-(define-record-type <triangle>
-  (make-raw-triangle points center radius)
-  triangle?
-  (points triangle-points)
-  (center triangle-center)
-  (radius triangle-radius))
-
-(define (make-triangle p1 p2 p3)
-  (let ((center (circumcenter p1 p2 p3)))
-    (make-raw-triangle
-     (list p1 p2 p3)
-     center
-     (points-distance center p1))))
-
-(define (circumcenter p1 p2 p3)
-  (receive (a b c)
-      (perpendicular-line-from-points p1 p2)
-    (receive (e f g)
-        (perpendicular-line-from-points p2 p3)
-      (let ((determinant (- (* a f) (* e b))))
-        (make-point
-         (/ (- (* f c) (* b g)) determinant)
-         (/ (- (* a g) (* e c)) determinant))))))
-
-(define (perpendicular-line-from-points p1 p2)
-  (let ((x1 (point-x p1))
-        (y1 (point-y p1))
-        (x2 (point-x p2))
-        (y2 (point-y p2)))
-    (let* ((a (- y2 y1))
-           (b (- x1 x2))
-           (c (+ (* a x1) (* b y2))))
-      (let ((mid-x (/ (+ x1 x2) 2))
-            (mid-y (/ (+ y1 y2) 2)))
-        (values (- b)
-                a
-                (+ (* (- b) mid-x) (* a mid-y)))))))
-
-(define (triangle-has-edge triangle a b)
-  (let ((points (triangle-points triangle)))
-    (let ((p1 (car points))
-          (p2 (cadr points))
-          (p3 (caddr points)))
-      (or (and (equal? p1 a) (equal? p2 b))
-          (and (equal? p1 b) (equal? p2 a))
-          (and (equal? p2 a) (equal? p3 b))
-          (and (equal? p2 b) (equal? p3 a))
-          (and (equal? p3 a) (equal? p1 b))
-          (and (equal? p3 b) (equal? p1 a))))))