Courses/CS 461/Winter 2006/Nghia Phan/Nghia Phan/Week 1

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Contents 1 My Information 2 Exercise 1 2.1 Description 2.1.1 Instruction on installation 2.2 Code 3 Comments

[edit] My Information

• Email: nghiangocphan@gmail.com

[edit] Exercise 1

[edit] Description

This is a simple model that shows bouncing balls in a box. The extension of this model can simulate the following:

• Interaction of the molecules in the closed space
• Using a bouncing ball to trace a graph of any mathematical equations
• Soccer game simular to soccer.jar
• etc.

[edit] Instruction on installation

• Create buttons called "setup" and "go" (Set "go" button to forever)
• Create a slider called "number"

[edit] Code

globals [step]

;;This is the procedure to setup the model
to setup
  ca
  setup-turtles
end
;;******************************************************************************************************
;;This is the procedure to setup the turtles
to setup-turtles
  crt number
  ask turtles
  [
    set shape "circle"
    fd (random screen-edge-x)
    if (shade-of? black color)
      [ set color white ]
  ] 
end
;;******************************************************************************************************
to go
  ask turtles 
  [
    set step 1
    
    if (pxcor-of patch-ahead 1 >= screen-edge-x or pxcor-of patch-ahead 1 <= (- screen-edge-x) 
    or pycor-of patch-ahead 1 >= screen-edge-y or pycor-of patch-ahead 1 <= (- screen-edge-y))
      [
        set heading (random 360)
        set step 0
      ]
    fd step
  ]

end
;;******************************************************************************************************

[edit] Comments

So far, I like using Netlogo. However, I am still not comfortable with its syntax. Especially, you have to distinquish the primitive functions between turtle, patch, observer, and etc. Beside these, I think Netlogo can be very usefull in education. We can use Netlogo to build any model to help the students better understand of what they are studying.