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On 2009-07-24 00:41, John McKeon wrote:
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<div class="gmail_quote">On Thu, Jul 23, 2009 at 6:26 PM, John McKeon
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:p3anoman@gmail.com">p3anoman@gmail.com</a>></span>
wrote:<br>
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<div class="h5">On Thu, Jul 23, 2009 at 12:11 PM, Eliot Miranda <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:eliot.miranda@gmail.com" target="_blank">eliot.miranda@gmail.com</a>></span>
wrote:<br>
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Hi Gary,<br>
<br>
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<div>On Thu, Jul 23, 2009 at 3:28 AM, Gary Dunn <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:osp@aloha.com" target="_blank">osp@aloha.com</a>></span>
wrote:<br>
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On Thu, 2009-07-23 at 00:19 -0400, John McKeon wrote:<br>
><br>
><br>
> On Tue, Jul 21, 2009 at 12:57 PM, Gary Dunn <<a
moz-do-not-send="true" href="mailto:osp@aloha.com" target="_blank">osp@aloha.com</a>>
wrote:<br>
> I was reading about SqueakMap and came across the Swiki
page<br>
> for Alice<br>
><br>
> <a moz-do-not-send="true"
href="http://wiki.squeak.org/squeak/1861" target="_blank">http://wiki.squeak.org/squeak/1861</a><br>
><br>
> Is anyone actively using Alice in Squeak?<br>
><br>
> - The page was last edited in 2004<br>
><br>
> - The first link is dead<br>
><br>
> - The second link goes to the new, improved Sun
sponsored<br>
> all Java<br>
> version of Alice, which appears to be healthy<br>
><br>
> - The third link downloads a Ph.D. dissertation from
1997<br>
><br>
> - After the outdated info is a rant on the shortcomings
of<br>
> OpenGL.<br>
> It just starts up, mid stream, "There is a serious design
flaw<br>
> in the<br>
> lighting or rather the shading." This should be removed.<br>
><br>
> - A search on the Swiki for Alice includes a page on
Falice<br>
> which<br>
> links to <a moz-do-not-send="true"
href="http://www.falice.com" target="_blank">www.falice.com</a> which
is a parked domain.<br>
><br>
> Last but not least, when I try to load
"FullImageProjectAlice"<br>
> I get<br>
> errors. Very likely I am doing something wrong.<br>
><br>
> Is this worth pursuing, or has Alice in Squeakland wandered<br>
> off?<br>
><br>
> Aloha Gary,<br>
> I remember the first time I saw Squeak, A;ice was pre-loaded in the<br>
> image, so I did some digging.<br>
> If you are really interested go to <a moz-do-not-send="true"
href="http://ftp.squeak.org" target="_blank">ftp.squeak.org</a> and
download a a<br>
> 2.x version of Squeak.<br>
> The 2.8 distribution has it installed. Be warned, the older Squeak<br>
> interface might disappoint you ;)<br>
><br>
> Regards<br>
> John McKeon<br>
<br>
Thanks, John. I downloaded the 2.8 image and changes files, and the V2<br>
sources, and launched squeak with those. It opens fine, if old looking,<br>
and Alice is in there. I did a Wonderland new. and ran into an error:<br>
<br>
mustBeBoolean<br>
"Catches attempts to test truth of non-Booleans. This message
is sent<br>
from the<br>
interpreter."<br>
<br>
self error: 'NonBoolean receiver--proceed for truth.'.<br>
^true<br>
<br>
The offending code is<br>
<br>
areasRemainingToFill: aRectangle<br>
^myCamera drawSceneBackground<br>
ifTrue:[aRectangle areasOutside: self bounds]<br>
ifFalse:[Array with: aRectangle]<br>
<br>
where "bounds" in the ifTrue branch is highlighted.</blockquote>
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<div>This looks as if myCamera drawSceneBackground is not
returning a boolean. Certain messages, in particular ifTrue: ifFalse:
ifTrue:ifFalse: whileTrue: and whileFalse: are inlined by the compiler
into conditional branch instructions which operate on the object on top
of stack. The conditional branches expect either true or false, the
sole instances of True and False respectively. When they encounter
something other than true or false the VM sends mustBeBoolean to that
object. So look in the debugger at the object that has received mustBeBoolean. This was the result that <span
style="font-family: arial,sans-serif; font-size: 13px; border-collapse: collapse;">myCamera
drawSceneBackground returned, whereas areasRemainingToFill: expected a
boolean.</span></div>
<div><font face="arial, sans-serif"><span
style="border-collapse: collapse;"><br>
</span></font></div>
<div><font face="arial, sans-serif"><span
style="border-collapse: collapse;">HTH</span></font></div>
<div><font face="arial, sans-serif"><span
style="border-collapse: collapse;">Eliot</span></font></div>
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<div><br>
Those errors disappear with the latest code in a 3.10 image. <br>
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A little more digging reveals that senders of bounds have something to<br>
do with AlignmentMorph, which is old stuff -- is the problem that ny VM<br>
is too "new.?"<br>
<br>
Any suggestions as to how to proceed? Is there a way to cast "bounds" to<br>
the Boolean requirement? Sorry, that's my C showing.</blockquote>
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I believe that is what makes Smalltalk a *strongly* typed language. No
typecasting. <br>
<br>
Loading the latest Baloon3D code from Squeaksource yields somewhat
better results but there is a bit of post load actions that appear to
be required.</div>
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<div>Sorry, prematurely sent.<br>
<br>
I evaluated all of the following the first two of which are definitely
needed but I am not sure of the other two.<br>
WonderlandConstants initialize.<br>
WonderlandConstants recompileUsers.<br>
B3DHardwareEngine initialize.<br>
B3DAcceleratorPlugin new initialiseModule.<br>
<br>
I am able to get Wonderland new to run. But a warning message tells me
that B3DPrimitiveEngine is not enabled (and I cannot as yet figure out
how to enable it). Once Alice is running no graphics are rendered, just
a blue screen(!) :)<br>
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Do you have the Squeak3D plugin in the SqueakVM directory ?<br>
<a class="moz-txt-link-freetext" href="http://squeakvm.org/win32/release/Squeak3D.zip">http://squeakvm.org/win32/release/Squeak3D.zip</a><br>
<br>
Karl<br>
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Then mousing over Wonderland throws errors in
WonderlandCamera>>pickAt: aPoint when it calls<br>
B3DRenderEngine defaultForPlatformOn: nil <br>
where nil should be(?) a Form object. BitBlt eventually tries to access
the boundingBox of this undefined <a moz-do-not-send="true"
href="http://object.in">object.in</a> BitBlt>>setDestForm: aForm
causing an MNU<br>
<br>
Thats as far as I have gotten for now,<br>
John<br>
<br>
<br>
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--<br>
Gary Dunn, Honolulu<br>
<a moz-do-not-send="true" href="mailto:osp@aloha.com"
target="_blank">osp@aloha.com</a><br>
<a moz-do-not-send="true" href="http://openslate.net/"
target="_blank">http://openslate.net/</a><br>
<a moz-do-not-send="true" href="http://e9erust.blogspot.com/"
target="_blank">http://e9erust.blogspot.com/</a><br>
Sent from Slate001<br>
<br>
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