Vision Cone Example 2 NetLogo Model
Produced for the book series "Artificial Intelligence";
Author: W. J. Teahan; Publisher: Ventus Publishing Aps, Denmark.
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view/download model file: Vision-Cone-Example-2.nlogo
WHAT IS IT?
This example demonstrates how to give a turtle a "cone of vision" in front of it. It uses the IN-CONE primitive to filter an agentset according to whether the turtles or patches in it are in the calling turtle's cone of vision.
In addition to IN-CONE, also available is IN-CONE-NOWRAP.
The code written by Uri Wilensky has been slightly modified by Bill Teahan for the following book:
Teahan, W. J. (2010). Artificial Intelligence. Ventus Publishing Aps.
PROCEDURES
; This code written by Uri Wilensky (see copyright message below)
; has been slightly modified by Bill Teahan for the following
; book:
;
; Teahan, W. J. (2010). Artificial Intelligence. Ventus Publishing Aps.
;
breed [ wanderers wanderer ] ;; big red turtle that moves around
breed [ standers stander ] ;; little gray turtles that just stand there
to setup
clear-all
;; make a background of lots of randomly scattered
;; stationary gray turtles
create-standers number-of-standers
[
setxy random-xcor random-ycor
set color gray
]
;; make one big red turtle that is going to move around
create-wanderers number-of-wanderers
[
set color red
set size 15
]
;; make the vision cone initially visible
go
end
to go
ask standers [ set color gray ]
ask wanderers
[
rt random 20
lt random 20
fd 1
;; could use IN-CONE-NOWRAP here instead of IN-CONE
ask standers in-cone vision-radius vision-angle
[
set color white
]
]
tick
end
; *** NetLogo 4.0.4 Code Example Copyright Notice ***
;
; (C) 2004 Uri Wilensky. This code may be freely copied, distributed,
; altered, or otherwise used by anyone for any legal purpose.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
; OWNERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;
; *** End of NetLogo 4.0.4 Code Example Copyright Notice ***