Re: [zzdev] Re: [zzdev] :zz: Operations defined for ZZTP ( zzOplists.D8

[Ted Nelson <ted@xxxxxxxxxx>]

Hi Tuomas--

>1. I thought at some point you were  removing the word "cursor" and
>starting to use  "frame".
>
>2. do these cursors contain the dimensions also?

Oops, "frame" is the better term, since the frame *does* contain
 the dimensions.

>3. CHUG*,  SHEAR* etc are not defined clearly enough here. We talked about
>you defining  them about a year ago but you never got back to us on that,
>unfortunately.

Right.  Well, I think they're clarified by now, but I can only get out
 about one memo a month ...   Sigh.

>>   whichcur CURSORFORK  [  creates a new first-class cursor in the same
>> location  ]
>>  
>>   whichcur KILLCURSOR [  evaporates the current cursor  ]
>>  
>>   whichcur SUBCURSOR   [ creates a subordinate cursor managed by another
>> cursor, to be used in some sub-operation ]
>>  
>>   whichcur KILLSUBCURSOR   [ evaporates the current subcursor, but only if
>> it is a subcursor in some current set.  Killing the last subcursor of a set
>> is effectively a return-from-subroutine to a parent cursor above ]
>
>These are rather unclear as well, as you  have not properly defined  cursors
>and subcursors yet.

Subcursors I know are new.  I'm not sure what definition you want
 of cursors.  I know the geometry of cursor-wheels and whatnot
 that I presently have in mind, but I don't have any metaphysical
 or mathematical definition ...

>> == VIEW OPERATIONS
>> 
>>   whichcur RASTER  [ sends out the current raster list, somehow
>> linearized-- how linearized to be dealt with later ]
>>   
>>   whichcur REFRESH [ sends out the current raster list, with contents,
>> somehow linearized-- how linearized to be dealt with later ]
>
>This means that the back-end has to be completely aware of any views.
>I don't  think  that's  necessarily a good thing.

Correct in the best cases.  But if you're talking to a dumb
 screen, it does.

>>   whichcur VIEWMODE typeno   [ selects a view type ]
>>   
>>   whichcur CELLVIEWMODE typeno   [ selects a cellview type ]
>
>Ditto.

Ditto.

Best, Ted


At 11:04 PM 11/11/01 +0200, you wrote:
>1. I thought at some point you were  removing the word "cursor" and
>starting to use  "frame".
>
>2. do these cursors contain the dimensions also?
>
>3. CHUG*,  SHEAR* etc are not defined clearly enough here. We talked about
>you defining  them about a year ago but you never got back to us on that,
>unfortunately.
>
>>   whichcur CURSORFORK  [  creates a new first-class cursor in the same
>> location  ]
>>  
>>   whichcur KILLCURSOR [  evaporates the current cursor  ]
>>  
>>   whichcur SUBCURSOR   [ creates a subordinate cursor managed by another
>> cursor, to be used in some sub-operation ]
>>  
>>   whichcur KILLSUBCURSOR   [ evaporates the current subcursor, but only if
>> it is a subcursor in some current set.  Killing the last subcursor of a set
>> is effectively a return-from-subroutine to a parent cursor above ]
>
>These are rather unclear as well, as you  have not properly defined  cursors
>and subcursors yet.
>
>> == VIEW OPERATIONS
>> 
>>   whichcur RASTER  [ sends out the current raster list, somehow
>> linearized-- how linearized to be dealt with later ]
>>   
>>   whichcur REFRESH [ sends out the current raster list, with contents,
>> somehow linearized-- how linearized to be dealt with later ]
>
>This means that the back-end has to be completely aware of any views.
>I don't  think  that's  necessarily a good thing.
>
>>   whichcur VIEWMODE typeno   [ selects a view type ]
>>   
>>   whichcur CELLVIEWMODE typeno   [ selects a cellview type ]
>
>Ditto.
>
>	Tuomas
>
_________________________________________
Theodor Holm Nelson              
Project Professor, Keio University SFC Campus, Fujisawa, Japan
Visiting Professor, University of Southampton, England
 ?  e-mail: ted@xxxxxxxxxx   ?  world-wide fax 1/415/332-0136
 ?  http://www.sfc.keio.ac.jp/~ted/    ?  http://www.xanadu.net
 ? Coordinates in USA      Tel. 415/ 331-4422
  Project Xanadu, 3020 Bridgeway #295, Sausalito CA 94965
_________________________________________