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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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.
; 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 ***