1 (in-package #:clnl-nvm)
3 (defun min-pxcor () (getf *dimensions* :xmin))
4 (defun max-pxcor () (getf *dimensions* :xmax))
5 (defun min-pycor () (getf *dimensions* :ymin))
6 (defun max-pycor () (getf *dimensions* :ymax))
10 :for i :from 0 :to 360
13 ((potential-sin (strictmath:sin (strictmath:to-radians i))))
14 (if (< (abs potential-sin) 3.2d-15) 0d0 potential-sin))))
16 (defun using-cached-sin (n)
17 (if (= (floor n) n) (nth (floor n) *cached-sins*) (strictmath:sin (strictmath:to-radians n))))
19 (defvar *cached-coses*
21 :for i :from 0 :to 360
24 ((potential-cos (strictmath:cos (strictmath:to-radians i))))
25 (if (< (abs potential-cos) 3.2d-15) 0d0 potential-cos))))
27 (defun using-cached-cos (n)
28 (if (= (floor n) n) (nth (floor n) *cached-coses*) (strictmath:cos (strictmath:to-radians n))))
30 (defun patch-at (xcor ycor)
32 ((rnd (d) (truncate (if (< d 0) (- d 0.5d0) (+ d 0.5d0)))))
36 (and (equalp (patch-xcor patch) (rnd xcor)) (equalp (patch-ycor patch) (rnd ycor))))
38 (error "This shouldn't be possible: ~S ~S ~S" (rnd xcor) (rnd ycor) *patches*))))
40 (defmacro with-patch-update (turtle &rest forms)
42 ((patch (gensym)) (new-patch (gensym)) (retn (gensym)))
44 ((,patch (patch-at (turtle-xcor ,turtle) (turtle-ycor ,turtle)))
45 (,retn (progn ,@forms)))
47 ((,new-patch (patch-at (turtle-xcor ,turtle) (turtle-ycor ,turtle))))
48 (when (not (eql ,patch ,new-patch))
49 (setf (patch-turtles ,patch) (remove ,turtle (patch-turtles ,patch)))
50 (setf (patch-turtles ,new-patch) (nconc (patch-turtles ,new-patch) (list ,turtle))))