Creating a few turtles

[clnl] / src / main / nvm.lisp

diff --git a/src/main/nvm.lisp b/src/main/nvm.lisp
index 3ea76d9309c681662c6f35e686348dc8212fc812..011eb6d8158c9ce1452f3cabf422bf5352b47c79 100644 (file)
--- a/src/main/nvm.lisp
+++ b/src/main/nvm.lisp
@@ -2,8 +2,31 @@
 
 ; This is the engine.  Yay.
 
+(defvar *current-id* 0)
+
+(defstruct turtle who color heading)
+(defvar *turtles* nil)
+
+(defun create-turtle ()
+ (push
+  (make-turtle :who *current-id*
+               :color (coerce (+ 5 (* 10 (cl-nl.random:next-int 14))) 'double-float)
+               :heading (coerce (cl-nl.random:next-int 360) 'double-float))
+  *turtles*)
+ (incf *current-id*))
+
 (defun create-turtles (n)
- (format t "HELLO WORLD ~A~%" n))
+ (loop for i from 1 to n do (create-turtle)))
+
+(defun create-world ()
+ (setf *turtles* nil)
+ (setf *current-id* 0))
+
+(defun format-num (n)
+ (multiple-value-bind (int rem) (floor n)
+  (if (eql 0d0 rem)
+      (format nil "~A" int)
+      (format nil "~F" n))))
 
 (defun export-world ()
  (format nil "~{~A~%~}"
@@ -13,11 +36,19 @@
    ""
    (format nil "~S" "GLOBALS")
    "\"min-pxcor\",\"max-pxcor\",\"min-pycor\",\"max-pycor\",\"perspective\",\"subject\",\"nextIndex\",\"directed-links\",\"ticks\","
-   "\"-1\",\"1\",\"-1\",\"1\",\"0\",\"nobody\",\"0\",\"\"\"NEITHER\"\"\",\"-1\""
+   (format nil "\"-1\",\"1\",\"-1\",\"1\",\"0\",\"nobody\",\"~A\",\"\"\"NEITHER\"\"\",\"-1\"" *current-id*)
    ""
    (format nil "~S" "TURTLES")
    "\"who\",\"color\",\"heading\",\"xcor\",\"ycor\",\"shape\",\"label\",\"label-color\",\"breed\",\"hidden?\",\"size\",\"pen-size\",\"pen-mode\""
-   ""
+   (format nil "~{~A~%~}"
+    (mapcar
+     (lambda (turtle)
+      (format nil
+       "\"~A\",\"~A\",\"~A\",\"0\",\"0\",\"\"\"default\"\"\",\"\"\"\"\"\",\"9.9\",\"{all-turtles}\",\"false\",\"1\",\"1\",\"\"\"up\"\"\""
+       (turtle-who turtle)
+       (format-num (turtle-color turtle))
+       (format-num (turtle-heading turtle))))
+     (reverse *turtles*)))
    (format nil "~S" "PATCHES")
    "\"pxcor\",\"pycor\",\"pcolor\",\"plabel\",\"plabel-color\""
    "\"-1\",\"1\",\"0\",\"\"\"\"\"\",\"9.9\""