[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: ANN: bitmap shape capture for 8-bit graphics

Michael J. Mahon wrote:

aiiadict@gmail.com wrote:


DONE:

moveable shape preview window,
"clipboard" view window (moveable)
select lasso,
copy and
paste commands.


select lasso is now in assembly, stores directly to graphics RAM
instead
of HPLOT

interesting things I found  out:

1) make sure test program loads the @@#$%  ylookup table!  spent hours
on this mistake
2) you cannot capture (without workarounds) CONTROL-C from a basic
program...  I added
IF A$=chr$(3) do this....       unfortunately Control-C (copy) doesn't
ever make it to BASIC, because
it breaks a basic program



Cntl-C can be processed by a Applesoft program quite easily by
polling the keyboard with a PEEK.  This also has the advantage
that the program can check for input without stopping whatever
else it is doing/polling/animating.


Oops--I was thinking of what I do in a M/L loop, not Applesoft.

Linards' approach of error trapping Cntl-C is the way to go in
Applesoft.

-michael

Music synthesis for 8-bit Apple II's!
Home page:  http://members.aol.com/MJMahon/

"The wastebasket is our most important design
tool--and it is seriously underused."