[Newbies] The bouncing sound

[polishookm]

Hi Scott,

Thanks for your detailed answer which among other things shows that the 
beginners list is "A friendly place to get answers to even the most 
basic questions about Squeak."

I'll take a look at the next Squeakland image (and the current one as 
well) as you suggest. In the class I'm teaching, I'm working to present 
tile scripting and text coding as two sides of the same coin. So I'm not 
sure if we'll switch or not but I'm going to be taking a very close look 
at all that you mention in that image.

Thanks again for your help,

Mark

Scott Wallace wrote:
> Hi, Mark,
>
> What you're hearing is not a sound associated with the "bounce" but 
> rather a sound associated with an object hitting the "fence".
>
> The "fence" is a feature that makes a "forward" command which would 
> take an object beyond the edge of its container result in the the 
> object's jiggling back into the field of view, accompanied by a 
> special "fence" sound.  The intent is to reduce the incidence of 
> "runaways" when beginners write scripts using "forward" which rapidly 
> take an object beyond an edge of its container, thus making it disappear.
>
> When using "bounce", it's advisable to *disable* the "fence", because 
> the interactions between the logic of the two features can produce 
> confusing results.
>
> Use the world's "playfield options" menu to disable the fence.
>
> However, without the fence, in your student's example, there seem to 
> be situations in which the the paddle overshoots the boundary and 
> disappears.  I think you could eliminate these situations by slightly 
> reducing the factor used in the paddle's script1.
>
> In the olpc/etoys image, there's an added preference that suppresses 
> the fence *sound*, thus allowing the fence feature to be used to keep 
> an object within its container's bounds but without the annoyance of 
> hearing the "fence" sound.  But this is not in 3.9.
>
> These two features -- a container's "fence" feature and the ability 
> for a moving object to request "bounce" -- have always, unhappily, 
> been somewhat in conflict.  For the "next" system we expect to have a 
> much more harmonious and consistent and understandable way of offering 
> such things.
>
> BTW, unless you have a compelling reason to be using 3.9, and 
> particularly if tile-scripting is the main focus of your class I 
> suggest that you have your students use a Squeakland image rather than 
> a 3.9 or 3.10, simply because extensive enhancements, fixes, and 
> documentation for tile-scripting ("etoys") are available in the 
> Squeakland images.  But if you do decide to switch, it's probably best 
> to wait a short while until the "new Squeakland image" gets released.  
> This will be based on the OLPC-etoys image, which is the system in 
> which all the advances in etoys have been made over the past 18 months 
> -- hundreds of bug-fixes, feature-enhancements, performance 
> improvement, example projects, tutorials, and other documentation, 
> plus a large user community.
>
> Cheers,
>
>   -- Scott
>
>
> On Feb 20, 2008, at 8:29 PM, polishookm wrote:
>
>> Scott,
>>
>> Here's a project file that demonstrates the problem. I'm working in 
>> the most recent ver. of Squeak from www.squeak.org (just downloaded a 
>> few days ago) .... 3.9-final-7067
>>
>> When I activate the script with the object controlled by a joystick, 
>> the first few times it hits the top of the world and it's silent - 
>> all is well. But at some point, after 3 or 4 or 5 collisions, it's no 
>> longer silent.
>>
>> All help much appreciated and thanks very much in advance for looking 
>> at the project (made by a student in the class I'm teaching).
>>
>> Ab,
>>
>> Mark
>>
>>
>>
>> Scott Wallace wrote:
>>> Hi, polishookm,
>>>
>>> I cannot reproduce the phenomenon you describe in any image I have 
>>> close to hand -- not in Squeak 3.9, not in Squeakland3.8-05, and not 
>>> in the OLPC etoys image.   (Can anyone else?)
>>>
>>> What version of Squeak are you using?  If it's 3.10, I'll leave it 
>>> for other 3.10 users to track this down, since I don't have a copy 
>>> of 3.10 handy.
>>>
>>> Otherwise, perhaps you could email me a copy of a project of yours 
>>> which exhibits this symptom...
>>>
>>>
>>> Cheers,
>>>
>>> -- Scott
>>>
>>>
>>>
>>> On Feb 20, 2008, at 6:38 PM, polishookm wrote:
>>>
>>>> I"m finding that with
>>>>
>>>> [Rectangle forward by 5]
>>>> [Rectangle bounce silence]
>>>>
>>>> the rectangle eventually collides with the top of the world and 
>>>> bounces off in the opposite direction - with no sound ... the 
>>>> bounce is silent.
>>>>
>>>> However, this script
>>>>
>>>> [Rectangle forward by JoyStick's upDown * 8]
>>>> [Rectangle bounce silence]
>>>>
>>>> doesn't allow the Rectangle bounce silently off the edge of the 
>>>> world. In this case, when the rectangle  reaches the top of the 
>>>> world, it makes a bouncing sound. The exact sound can be selected 
>>>> in the [Rectangle bounce silence] tile. But selecting 'silence' as 
>>>> the sound doesn't seem to work.
>>>>
>>>> Am I missing something obvious? Shouldn't it be possible to silence 
>>>> the bounce?
>>>>
>>>>
>>>> _______________________________________________
>>>> Beginners mailing list
>>>> Beginners at lists.squeakfoundation.org
>>>> http://lists.squeakfoundation.org/mailman/listinfo/beginners
>>>
>>
>> -- 
>> Mark Polishook, D.M.A.
>> Technology Coordinator
>> Morehead Hall, Rm 132
>> Center for Academic Advising and Adult Learning
>> Montclair State University
>> Montclair, NJ 07043
>>
>> (973)-655-7114
>> http://www.montclair.edu/AcademicAdvising/html
>> polishookm at mail.montclair.edu
>>
>> <GLPong.002.pr>
>

-- 
Mark Polishook, D.M.A.
Technology Coordinator
Morehead Hall, Rm 132
Center for Academic Advising and Adult Learning
Montclair State University
Montclair, NJ 07043

(973)-655-7114
http://www.montclair.edu/AcademicAdvising/html
polishookm at mail.montclair.edu