1 ; Copyright 2022 Frank Duncan (frank@consxy.com) under AGPL3. See distributed LICENSE.txt.
2 (in-package #:clnl-nvm)
4 (defun min-pxcor () (getf *dimensions* :xmin))
5 (defun max-pxcor () (getf *dimensions* :xmax))
6 (defun min-pycor () (getf *dimensions* :ymin))
7 (defun max-pycor () (getf *dimensions* :ymax))
11 :for i :from 0 :to 360
14 ((potential-sin (strictmath:sin (strictmath:to-radians i))))
15 (if (< (abs potential-sin) 3.2d-15) 0d0 potential-sin))))
17 (defun using-cached-sin (n)
18 (if (= (floor n) n) (nth (floor n) *cached-sins*) (strictmath:sin (strictmath:to-radians n))))
20 (defvar *cached-coses*
22 :for i :from 0 :to 360
25 ((potential-cos (strictmath:cos (strictmath:to-radians i))))
26 (if (< (abs potential-cos) 3.2d-15) 0d0 potential-cos))))
28 (defun using-cached-cos (n)
29 (if (= (floor n) n) (nth (floor n) *cached-coses*) (strictmath:cos (strictmath:to-radians n))))
31 (defun patch-at (xcor ycor)
33 ((rnd (d) (truncate (if (< d 0) (- d 0.5d0) (+ d 0.5d0)))))
37 (and (equalp (patch-xcor patch) (rnd xcor)) (equalp (patch-ycor patch) (rnd ycor))))
39 (error "This shouldn't be possible: ~S ~S ~S" (rnd xcor) (rnd ycor) *patches*))))
41 (defmacro with-patch-update (turtle &rest forms)
43 ((patch (gensym)) (new-patch (gensym)) (retn (gensym)))
45 ((,patch (patch-at (turtle-xcor ,turtle) (turtle-ycor ,turtle)))
46 (,retn (progn ,@forms)))
48 ((,new-patch (patch-at (turtle-xcor ,turtle) (turtle-ycor ,turtle))))
49 (when (not (eql ,patch ,new-patch))
50 (setf (patch-turtles ,patch) (remove ,turtle (patch-turtles ,patch)))
51 (setf (patch-turtles ,new-patch) (nconc (patch-turtles ,new-patch) (list ,turtle))))