[squeak-dev] Did Alice wander?

I was reading about SqueakMap and came across the Swiki page for Alice

http://wiki.squeak.org/squeak/1861

Is anyone actively using Alice in Squeak?

   - The page was last edited in 2004

   - The first link is dead

   - The second link goes to the new, improved Sun sponsored all Java
version of Alice, which appears to be healthy

   - The third link downloads a Ph.D. dissertation from 1997

   - After the outdated info is a rant on the shortcomings of OpenGL.
It just starts up, mid stream, "There is a serious design flaw in the
lighting or rather the shading." This should be removed.

   - A search on the Swiki for Alice includes a page on Falice which
links to www.falice.com which is a parked domain.

Last but not least, when I try to load "FullImageProjectAlice" I get
errors. Very likely I am doing something wrong.

Is this worth pursuing, or has Alice in Squeakland wandered off?

--
Gary Dunn, Honolulu
[hidden email]
http://openslate.net/
http://e9erust.blogspot.com/
Sent from Slate001

On Thu, 2009-07-23 at 00:19 -0400, John McKeon wrote:
>
>
> On Tue, Jul 21, 2009 at 12:57 PM, Gary Dunn <[hidden email]> wrote:
>         I was reading about SqueakMap and came across the Swiki page
>         for Alice
>
>         http://wiki.squeak.org/squeak/1861
>
>         Is anyone actively using Alice in Squeak?
>
>            - The page was last edited in 2004
>
>            - The first link is dead
>
>            - The second link goes to the new, improved Sun sponsored
>         all Java
>         version of Alice, which appears to be healthy
>
>            - The third link downloads a Ph.D. dissertation from 1997
>
>            - After the outdated info is a rant on the shortcomings of
>         OpenGL.
>         It just starts up, mid stream, "There is a serious design flaw
>         in the
>         lighting or rather the shading." This should be removed.
>
>            - A search on the Swiki for Alice includes a page on Falice
>         which
>         links to www.falice.com which is a parked domain.
>
>         Last but not least, when I try to load "FullImageProjectAlice"
>         I get
>         errors. Very likely I am doing something wrong.
>
>         Is this worth pursuing, or has Alice in Squeakland wandered
>         off?
>
> Aloha Gary,
> I remember the first time I saw Squeak, A;ice was pre-loaded in the
> image, so I did some digging.
> If  you are really interested go to ftp.squeak.org and download a a
> 2.x version of Squeak.
> The 2.8 distribution has it installed. Be warned, the older Squeak
> interface might disappoint you ;)
>
> Regards
> John McKeon

Thanks, John. I downloaded the 2.8 image and changes files, and the V2
sources, and launched squeak with those. It opens fine, if old looking,
and Alice is in there. I did a Wonderland new. and ran into an error:

mustBeBoolean
       "Catches attempts to test truth of non-Booleans.  This message is sent
from the
       interpreter."

       self error: 'NonBoolean receiver--proceed for truth.'.
       ^true

The offending code is

areasRemainingToFill: aRectangle
       ^myCamera drawSceneBackground
               ifTrue:[aRectangle areasOutside: self bounds]
               ifFalse:[Array with: aRectangle]

where "bounds" in the ifTrue branch is highlighted.

A little more digging reveals that senders of bounds have something to
do with AlignmentMorph, which is old stuff -- is the problem that ny VM
is too "new.?"

Any suggestions as to how to proceed? Is there a way to cast "bounds" to
the Boolean requirement? Sorry, that's my C showing.

--

Gary Dunn, Honolulu
[hidden email]
http://openslate.net/
http://e9erust.blogspot.com/
Sent from Slate001

On Thu, 2009-07-23 at 00:19 -0400, John McKeon wrote:
>
>
> On Tue, Jul 21, 2009 at 12:57 PM, Gary Dunn <[hidden email]> wrote:
>         I was reading about SqueakMap and came across the Swiki page
>         for Alice
>
>         http://wiki.squeak.org/squeak/1861
>
>         Is anyone actively using Alice in Squeak?
>
>            - The page was last edited in 2004
>
>            - The first link is dead
>
>            - The second link goes to the new, improved Sun sponsored
>         all Java
>         version of Alice, which appears to be healthy
>
>            - The third link downloads a Ph.D. dissertation from 1997
>
>            - After the outdated info is a rant on the shortcomings of
>         OpenGL.
>         It just starts up, mid stream, "There is a serious design flaw
>         in the
>         lighting or rather the shading." This should be removed.
>
>            - A search on the Swiki for Alice includes a page on Falice
>         which
>         links to www.falice.com which is a parked domain.
>
>         Last but not least, when I try to load "FullImageProjectAlice"
>         I get
>         errors. Very likely I am doing something wrong.
>
>         Is this worth pursuing, or has Alice in Squeakland wandered
>         off?
>
> Aloha Gary,
> I remember the first time I saw Squeak, A;ice was pre-loaded in the
> image, so I did some digging.
> If  you are really interested go to ftp.squeak.org and download a a
> 2.x version of Squeak.
> The 2.8 distribution has it installed. Be warned, the older Squeak
> interface might disappoint you ;)
>
> Regards
> John McKeon

Thanks, John. I downloaded the 2.8 image and changes files, and the V2
sources, and launched squeak with those. It opens fine, if old looking,
and Alice is in there. I did a Wonderland new. and ran into an error:

mustBeBoolean
       "Catches attempts to test truth of non-Booleans.  This message is sent
from the
       interpreter."

       self error: 'NonBoolean receiver--proceed for truth.'.
       ^true

The offending code is

areasRemainingToFill: aRectangle
       ^myCamera drawSceneBackground
               ifTrue:[aRectangle areasOutside: self bounds]
               ifFalse:[Array with: aRectangle]

where "bounds" in the ifTrue branch is highlighted.

A little more digging reveals that senders of bounds have something to
do with AlignmentMorph, which is old stuff -- is the problem that ny VM
is too "new.?"

Any suggestions as to how to proceed? Is there a way to cast "bounds" to
the Boolean requirement? Sorry, that's my C showing.

--
Gary Dunn, Honolulu
[hidden email]
http://openslate.net/
http://e9erust.blogspot.com/
Sent from Slate001

Hi Gary,

On Thu, Jul 23, 2009 at 3:28 AM, Gary Dunn <[hidden email]> wrote:

On Thu, 2009-07-23 at 00:19 -0400, John McKeon wrote:
>
>
> On Tue, Jul 21, 2009 at 12:57 PM, Gary Dunn <[hidden email]> wrote:
>         I was reading about SqueakMap and came across the Swiki page
>         for Alice
>
>         http://wiki.squeak.org/squeak/1861
>
>         Is anyone actively using Alice in Squeak?
>
>            - The page was last edited in 2004
>
>            - The first link is dead
>
>            - The second link goes to the new, improved Sun sponsored
>         all Java
>         version of Alice, which appears to be healthy
>
>            - The third link downloads a Ph.D. dissertation from 1997
>
>            - After the outdated info is a rant on the shortcomings of
>         OpenGL.
>         It just starts up, mid stream, "There is a serious design flaw
>         in the
>         lighting or rather the shading." This should be removed.
>
>            - A search on the Swiki for Alice includes a page on Falice
>         which
>         links to www.falice.com which is a parked domain.
>
>         Last but not least, when I try to load "FullImageProjectAlice"
>         I get
>         errors. Very likely I am doing something wrong.
>
>         Is this worth pursuing, or has Alice in Squeakland wandered
>         off?
>
> Aloha Gary,
> I remember the first time I saw Squeak, A;ice was pre-loaded in the
> image, so I did some digging.
> If  you are really interested go to ftp.squeak.org and download a a
> 2.x version of Squeak.
> The 2.8 distribution has it installed. Be warned, the older Squeak
> interface might disappoint you ;)
>
> Regards
> John McKeon

Thanks, John. I downloaded the 2.8 image and changes files, and the V2
sources, and launched squeak with those. It opens fine, if old looking,
and Alice is in there. I did a Wonderland new. and ran into an error:

mustBeBoolean
       "Catches attempts to test truth of non-Booleans.  This message is sent
from the
       interpreter."

       self error: 'NonBoolean receiver--proceed for truth.'.
       ^true

The offending code is

areasRemainingToFill: aRectangle
       ^myCamera drawSceneBackground
               ifTrue:[aRectangle areasOutside: self bounds]
               ifFalse:[Array with: aRectangle]

where "bounds" in the ifTrue branch is highlighted.

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 myCamera drawSceneBackground returned, whereas areasRemainingToFill: expected a boolean.

HTH

Eliot

A little more digging reveals that senders of bounds have something to
do with AlignmentMorph, which is old stuff -- is the problem that ny VM
is too "new.?"

Any suggestions as to how to proceed? Is there a way to cast "bounds" to
the Boolean requirement? Sorry, that's my C showing.

--
Gary Dunn, Honolulu
[hidden email]
http://openslate.net/
http://e9erust.blogspot.com/
Sent from Slate001

On Thu, Jul 23, 2009 at 12:11 PM, Eliot Miranda <[hidden email]> wrote:

Hi Gary,

On Thu, Jul 23, 2009 at 3:28 AM, Gary Dunn <[hidden email]> wrote:

On Thu, 2009-07-23 at 00:19 -0400, John McKeon wrote:
>
>
> On Tue, Jul 21, 2009 at 12:57 PM, Gary Dunn <[hidden email]> wrote:
>         I was reading about SqueakMap and came across the Swiki page
>         for Alice
>
>         http://wiki.squeak.org/squeak/1861
>
>         Is anyone actively using Alice in Squeak?
>
>            - The page was last edited in 2004
>
>            - The first link is dead
>
>            - The second link goes to the new, improved Sun sponsored
>         all Java
>         version of Alice, which appears to be healthy
>
>            - The third link downloads a Ph.D. dissertation from 1997
>
>            - After the outdated info is a rant on the shortcomings of
>         OpenGL.
>         It just starts up, mid stream, "There is a serious design flaw
>         in the
>         lighting or rather the shading." This should be removed.
>
>            - A search on the Swiki for Alice includes a page on Falice
>         which
>         links to www.falice.com which is a parked domain.
>
>         Last but not least, when I try to load "FullImageProjectAlice"
>         I get
>         errors. Very likely I am doing something wrong.
>
>         Is this worth pursuing, or has Alice in Squeakland wandered
>         off?
>
> Aloha Gary,
> I remember the first time I saw Squeak, A;ice was pre-loaded in the
> image, so I did some digging.
> If  you are really interested go to ftp.squeak.org and download a a
> 2.x version of Squeak.
> The 2.8 distribution has it installed. Be warned, the older Squeak
> interface might disappoint you ;)
>
> Regards
> John McKeon

Thanks, John. I downloaded the 2.8 image and changes files, and the V2
sources, and launched squeak with those. It opens fine, if old looking,
and Alice is in there. I did a Wonderland new. and ran into an error:

mustBeBoolean
       "Catches attempts to test truth of non-Booleans.  This message is sent
from the
       interpreter."

       self error: 'NonBoolean receiver--proceed for truth.'.
       ^true

The offending code is

areasRemainingToFill: aRectangle
       ^myCamera drawSceneBackground
               ifTrue:[aRectangle areasOutside: self bounds]
               ifFalse:[Array with: aRectangle]

where "bounds" in the ifTrue branch is highlighted.

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 myCamera drawSceneBackground returned, whereas areasRemainingToFill: expected a boolean.

HTH

Eliot

A little more digging reveals that senders of bounds have something to
do with AlignmentMorph, which is old stuff -- is the problem that ny VM
is too "new.?"

Any suggestions as to how to proceed? Is there a way to cast "bounds" to
the Boolean requirement? Sorry, that's my C showing.

I believe that is what makes Smalltalk a *strongly* typed language. No typecasting.

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.

 

--
Gary Dunn, Honolulu
[hidden email]
http://openslate.net/
http://e9erust.blogspot.com/
Sent from Slate001

--
http://jmck.seasidehosting.st

On 2009-07-24 00:41, John McKeon wrote:

On Thu, Jul 23, 2009 at 6:26 PM, John McKeon <[hidden email]> wrote:

On Thu, Jul 23, 2009 at 12:11 PM, Eliot Miranda <[hidden email]> wrote:

Hi Gary,

On Thu, Jul 23, 2009 at 3:28 AM, Gary Dunn <[hidden email]> wrote:

On Thu, 2009-07-23 at 00:19 -0400, John McKeon wrote:
>
>
> On Tue, Jul 21, 2009 at 12:57 PM, Gary Dunn <[hidden email]> wrote:
>         I was reading about SqueakMap and came across the Swiki page
>         for Alice
>
>         http://wiki.squeak.org/squeak/1861
>
>         Is anyone actively using Alice in Squeak?
>
>            - The page was last edited in 2004
>
>            - The first link is dead
>
>            - The second link goes to the new, improved Sun sponsored
>         all Java
>         version of Alice, which appears to be healthy
>
>            - The third link downloads a Ph.D. dissertation from 1997
>
>            - After the outdated info is a rant on the shortcomings of
>         OpenGL.
>         It just starts up, mid stream, "There is a serious design flaw
>         in the
>         lighting or rather the shading." This should be removed.
>
>            - A search on the Swiki for Alice includes a page on Falice
>         which
>         links to www.falice.com which is a parked domain.
>
>         Last but not least, when I try to load "FullImageProjectAlice"
>         I get
>         errors. Very likely I am doing something wrong.
>
>         Is this worth pursuing, or has Alice in Squeakland wandered
>         off?
>
> Aloha Gary,
> I remember the first time I saw Squeak, A;ice was pre-loaded in the
> image, so I did some digging.
> If  you are really interested go to ftp.squeak.org and download a a
> 2.x version of Squeak.
> The 2.8 distribution has it installed. Be warned, the older Squeak
> interface might disappoint you ;)
>
> Regards
> John McKeon

Thanks, John. I downloaded the 2.8 image and changes files, and the V2
sources, and launched squeak with those. It opens fine, if old looking,
and Alice is in there. I did a Wonderland new. and ran into an error:

mustBeBoolean
       "Catches attempts to test truth of non-Booleans.  This message is sent
from the
       interpreter."

       self error: 'NonBoolean receiver--proceed for truth.'.
       ^true

The offending code is

areasRemainingToFill: aRectangle
       ^myCamera drawSceneBackground
               ifTrue:[aRectangle areasOutside: self bounds]
               ifFalse:[Array with: aRectangle]

where "bounds" in the ifTrue branch is highlighted.

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 myCamera drawSceneBackground returned, whereas areasRemainingToFill: expected a boolean.

HTH

Eliot

Those errors disappear with the latest code in a 3.10 image.

 

A little more digging reveals that senders of bounds have something to
do with AlignmentMorph, which is old stuff -- is the problem that ny VM
is too "new.?"

Any suggestions as to how to proceed? Is there a way to cast "bounds" to
the Boolean requirement? Sorry, that's my C showing.

I believe that is what makes Smalltalk a *strongly* typed language. No typecasting.

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.

 

Sorry, prematurely sent.

I evaluated all of the following the first two of which are definitely needed but I am not sure of the other two.
     WonderlandConstants initialize.
     WonderlandConstants recompileUsers.
     B3DHardwareEngine initialize.
     B3DAcceleratorPlugin new initialiseModule.

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(!) :)

Do you have the Squeak3D plugin in the SqueakVM directory ?
http://squeakvm.org/win32/release/Squeak3D.zip

Karl

Then mousing over Wonderland throws errors in WonderlandCamera>>pickAt: aPoint when it calls
   B3DRenderEngine defaultForPlatformOn: nil 
where nil should be(?) a Form object. BitBlt eventually tries to access the boundingBox of this undefined object.in BitBlt>>setDestForm: aForm causing an MNU

Thats as far as I have gotten for now,
John


 

 

--
Gary Dunn, Honolulu
[hidden email]
http://openslate.net/
http://e9erust.blogspot.com/
Sent from Slate001

--
http://jmck.seasidehosting.st

--
http://jmck.seasidehosting.st