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Bill Kerr
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 Posted: Sun Nov 15, 2009 6:43 am Post subject: point towards the mouse? |
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On Thu, Nov 12, 2009 at 2:54 AM, Bert Freudenberg <bert@freudenbergs.de (bert@freudenbergs.de)> wrote:
| Quote: | Ah, I found your blog entry now. Attached is a project that I think does what you wanted - I did not hide the dots, would be simple though.
This task is a bit geared towards Scratch - it's more complicated in Etoys as there is no reification of the mouse pointer. Might be a nice idea to make a player for it though ...
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Nice project Bert, thanks
In reconstructing what you did I found out
1) that if I put the mouseDown script (click script) that moves the target object to the mouse object into the target script then it didn't work, it required a world script - not sure whether that is a bug or a feature (that you need a world script to detect a click on the world)
2) this line was tricky to build:
arrow's distance to target > 20
(a) ie. I found arrow's distance to dot in the observation pane and replaced the dot with a target - but then there were no option for a > extension
At that stage I would have given up but since you had done it then it had to be possible
(b) So I then found an arrow's distance with an assignment handle in the geometry pane and then found I could replace the arrow's distance part with the arrow's distance to target built in (a)
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Bill Kerr
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| Posted: Sun Nov 15, 2009 6:43 am Post subject: point towards the mouse? |
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On Thu, Nov 12, 2009 at 2:54 AM, Bert Freudenberg <bert@freudenbergs.de (bert@freudenbergs.de)> wrote:
| Quote: | Ah, I found your blog entry now. Attached is a project that I think does what you wanted - I did not hide the dots, would be simple though.
This task is a bit geared towards Scratch - it's more complicated in Etoys as there is no reification of the mouse pointer. Might be a nice idea to make a player for it though ...
|
Nice project Bert, thanks
In reconstructing what you did I found out
1) that if I put the mouseDown script (click script) that moves the target object to the mouse object into the target script then it didn't work, it required a world script - not sure whether that is a bug or a feature (that you need a world script to detect a click on the world)
2) this line was tricky to build:
arrow's distance to target > 20
(a) ie. I found arrow's distance to dot in the observation pane and replaced the dot with a target - but then there were no option for a > extension
At that stage I would have given up but since you had done it then it had to be possible
(b) So I then found an arrow's distance with an assignment handle in the geometry pane and then found I could replace the arrow's distance part with the arrow's distance to target built in (a)
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