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Herman
Herman presents ...

2009/8/2

Blue

Blue is an optical illusion! Which blue is darker?

Hit the Run button to start.

Author Herman Bakker
Date 01-08-2009

Drag the slider to the right/left
and notice the change in your perception
while you watch the blue colored parts.

9915 views / 9 in the last 7 days

17 votes | 0 in the last 7 days

Tags: mouse physics color light brightness psycho perception optical illusion

This scenario is a member of: Scenario showcase, Optical Illusions


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MeCantaMeCanta

2009/8/2

Smooth, I am delighted with this one and your collection :-)
HermanHerman

2009/8/5

My Blue.scenario shows up in the Scenario Showcase, but I don't see it in the Scenario Showcase Collection. Can someone tell me how this works?
It will take some time. You need to wait to be invited into the showcase collection, as the collection is actually independent to the showcase :)
mjrb4mjrb4

2009/8/5

The screen in front of me is telling me you've already got an invite - is it not showing up for some reason? Usually I'll issue the invitation as soon as I've put something in the showcase, but sometimes I forget... so give me a nudge if you think you've been hard done by ;-)
HermanHerman

2009/8/5

:D issue the invitation pls, it just ain't in my email
HermanHerman

2009/8/11

Hi, I wanted to show a nephew the use of the turtleGraphics scenario, but unfortunately nothing seems to happen after compiling the classes, and pressing the run button. Can I solve this problem here locally?
mjrb4mjrb4

2009/8/11

Hi Herman, Issues like this are probably best talked about on Greenfoot discuss so they don't get muddled with other scenarios :-) If you're getting confused and this doesn't help, probably best to talk about it there instead! I've just tried out the scenario on the latest version of Greenfoot (1.5.4) though and it seems to run fine. I take it you are adding the relevant turtles to the scenario before clicking the run button?
HermanHerman

2009/8/11

It's working fine now :-) You were right on the spot: I did not add a turtle to the scenario before clicking the run button.
MrIncredibleMrIncredible

2011/8/9

Can you please publish the source code of all scenarios in this collection ? Ather people can learn much from it! They are awesome : Why not publish the source code ? I hope you follow my instructions. MrIncredible
HermanHerman

2011/8/9

Great, one of these days/weeks I'll publish the source code of one of my scenarios in this Optical Illusions collection. All you have to do is name the one :---))

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