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Sample Models/Art
Optical Illusions
![[screen shot]](models/models/Sample%20Models/Art/Optical%20Illusions.png)
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Run Optical Illusions in your browser uses NetLogo 4.0.2 requires Java 1.4.1+ (system requirements) Note: If you download the NetLogo application, every model in the Models Library (besides the Community Models) is included. If you have trouble running this model in your browser, you may wish to download the application instead. |
WHAT IS IT?
This model presents five classic optical illusions.
HOW IT WORKS
The optical illusions are constructed using a combination of NetLogo turtles and patches.
ILLUSION #1 -- White circles on a gray background produce an illusion of the circles changing colors between black and white, depending on where you focus your eyes.
ILLUSION #2 -- Diagonals moving away from the center create an illusion of depth, which makes the parallel horizontal lines seem to bend in the center.
ILLUSION #3 -- The perpendicular lines that do not match row to row create an illusion of the lines between them being not parallel.
ILLUSION #4 -- Relative sizes of other circles skew the perception of the middle circles, creating an illusion of difference in size.
ILLUSION #5 -- Circles of diamonds seem to rotate you focus your eyes on their center.
HOW TO USE IT
Press a button to choose an illusion, and it will be presented in the NetLogo view.
Some explanatory text will appear in the monitor below the view.
EXTENDING THE MODEL
Add more illusions.
NETLOGO FEATURES
Many of the illusions in the model, such as illusions 2, 4 and 5, involve turtles positioned in a circle around a middle point. Optical Illusions is a great example of the use of FORWARD and HEADING to position objects in a pattern.
RELATED MODELS
Other models that were created "for fun" include Frogger, Lunar Lander and other games included in the Games section of the Models Library.
CREDITS AND REFERENCES
To refer to this model in academic publications, please use: Wilensky, U. (2005). NetLogo Optical Illusions model. http://ccl.northwestern.edu/netlogo/models/OpticalIllusions. Center for Connected Learning and Computer-Based Modeling, Northwestern University, Evanston, IL.
In other publications, please use: Copyright 2005 Uri Wilensky. All rights reserved. See http://ccl.northwestern.edu/netlogo/models/OpticalIllusions for terms of use.
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