(in-package #:clnl-nvm)
-(defun min-pxcor () (getf (clnl-model:world-dimensions *model*) :xmin))
-(defun max-pxcor () (getf (clnl-model:world-dimensions *model*) :xmax))
-(defun min-pycor () (getf (clnl-model:world-dimensions *model*) :ymin))
-(defun max-pycor () (getf (clnl-model:world-dimensions *model*) :ymax))
+(defun min-pxcor () (getf *dimensions* :xmin))
+(defun max-pxcor () (getf *dimensions* :xmax))
+(defun min-pycor () (getf *dimensions* :ymin))
+(defun max-pycor () (getf *dimensions* :ymax))
+
+(defvar *cached-sins*
+ (loop
+ :for i :from 0 :to 360
+ :collect
+ (let
+ ((potential-sin (strictmath:sin (strictmath:to-radians i))))
+ (if (< (abs potential-sin) 3.2d-15) 0d0 potential-sin))))
+
+(defun using-cached-sin (n)
+ (if (= (floor n) n) (nth (floor n) *cached-sins*) (strictmath:sin (strictmath:to-radians n))))
+
+(defvar *cached-coses*
+ (loop
+ :for i :from 0 :to 360
+ :collect
+ (let
+ ((potential-cos (strictmath:cos (strictmath:to-radians i))))
+ (if (< (abs potential-cos) 3.2d-15) 0d0 potential-cos))))
+
+(defun using-cached-cos (n)
+ (if (= (floor n) n) (nth (floor n) *cached-coses*) (strictmath:cos (strictmath:to-radians n))))
+
+(defun patch-at (xcor ycor)
+ (flet
+ ((rnd (d) (truncate (if (< d 0) (- d 0.5d0) (+ d 0.5d0)))))
+ (or
+ (find-if
+ (lambda (patch)
+ (and (equalp (patch-xcor patch) (rnd xcor)) (equalp (patch-ycor patch) (rnd ycor))))
+ *patches*)
+ (error "This shouldn't be possible: ~S ~S ~S" (rnd xcor) (rnd ycor) *patches*))))
+
+(defmacro with-patch-update (turtle &rest forms)
+ (let
+ ((patch (gensym)) (new-patch (gensym)) (retn (gensym)))
+ `(let
+ ((,patch (patch-at (turtle-xcor ,turtle) (turtle-ycor ,turtle)))
+ (,retn (progn ,@forms)))
+ (let
+ ((,new-patch (patch-at (turtle-xcor ,turtle) (turtle-ycor ,turtle))))
+ (when (not (eql ,patch ,new-patch))
+ (setf (patch-turtles ,patch) (remove ,turtle (patch-turtles ,patch)))
+ (setf (patch-turtles ,new-patch) (nconc (patch-turtles ,new-patch) (list ,turtle))))
+ ,retn))))
projects / clnl / blobdiff