:heading (if base-turtle
(turtle-heading base-turtle)
(coerce (clnl-random:next-int 360) 'double-float))
+ :shape (breed-default-shape :turtles)
:xcor (if base-turtle (turtle-xcor base-turtle) 0d0)
:ycor (if base-turtle (turtle-ycor base-turtle) 0d0))))
(setf *turtles* (nconc *turtles* (list new-turtle)))
(setf (turtle-xcor *self*) (wrap-x *topology* x))
(setf (turtle-ycor *self*) (wrap-y *topology* y)))
+(defun set-default-shape (breed shape)
+ "SET-DEFAULT-SHAPE BREED SHAPE => RESULT
+
+ARGUMENTS AND VALUES:
+
+ BREED: a valid breed
+ SHAPE: a string
+ RESULT: undefined
+
+DESCRIPTION:
+
+ Specifies a default initial shape for a BREED. When a turtle, or it changes breeds,
+ its shape is set to the given shape.
+
+ SET-DEFAULT-SHAPE doesn't affect existing agents, only agents you create afterwards.
+
+ See http://ccl.northwestern.edu/netlogo/docs/dictionary.html#set-default-shape"
+ (when (not (breed-p breed)) (error "Need a valid breed"))
+ (setf (breed-default-shape breed) shape))
+
(defun forward (n)
"FORWARD N => RESULT
This should be called before using the engine in any real capacity. If
called when an engine is already running, it may do somethign weird."
(setf *dimensions* dims)
+ (setf *breeds* (list (list :turtles "default")))
(setf
*patches*
(loop
(mapcar
(lambda (turtle)
(format nil
- "\"~A\",\"~A\",\"~A\",\"~A\",\"~A\",\"\"\"default\"\"\",\"~A\",\"~A\",\"{all-turtles}\",\"false\",\"~A\",~A"
+ "\"~A\",\"~A\",\"~A\",\"~A\",\"~A\",\"~A\",\"~A\",\"~A\",\"{all-turtles}\",\"false\",\"~A\",~A"
(dump-object (turtle-who turtle))
(dump-object (turtle-color turtle))
(dump-object (turtle-heading turtle))
(dump-object (turtle-xcor turtle))
(dump-object (turtle-ycor turtle))
+ (dump-object (turtle-shape turtle))
(dump-object (turtle-label turtle))
(dump-object (turtle-label-color turtle))
(dump-object (turtle-size turtle))