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Groups > comp.lang.python > #57474
| From | Grant Edwards <invalid@invalid.invalid> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: Unlimited canvas painting program |
| Date | 2013-10-24 21:51 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <l4c4ol$d5m$1@reader1.panix.com> (permalink) |
| References | <5d107d11-0abf-4180-a994-3368f12979c1@googlegroups.com> <mailman.1482.1382651119.18130.python-list@python.org> |
On 2013-10-24, Tim Chase <tim@thechases.com> wrote:
> On 2013-10-24 12:16, markotaht@gmail.com wrote:
>> How to create a program similar to paint, but the difference would
>> be that the cursor would be always in the middle and the canvas
>> moves or the camera is always fixed on the cursor as it moves
>> around the canvas. And the canvas should be infinite. What would be
>> reasonable to use?
>
> To hold an (effectively) infinite *bitmap* canvas, you'd (effectively)
> need an (effectively) infinite amount of memory.
Sparse arrays allow it to be sort-of implemented as long as most of
the bitmap is "empty".
> However, it could be done with an (effectively) infinite *vector*
> canvas.
Sort of. Eventually you run out of bits to hold the coordinates.
> That way you could limit the on-screen rendering to just the
> clipped subset of the vector collection.
The same can be done for a sparse array of bitmap subsets.
--
Grant Edwards grant.b.edwards Yow! I'm totally DESPONDENT
at over the LIBYAN situation
gmail.com and the price of CHICKEN
...
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Unlimited canvas painting program markotaht@gmail.com - 2013-10-24 12:16 -0700
Re: Unlimited canvas painting program Thomas Murphy <thomasmurphymusic@gmail.com> - 2013-10-24 15:22 -0400
Re: Unlimited canvas painting program markotaht@gmail.com - 2013-10-24 12:32 -0700
Re: Unlimited canvas painting program MRAB <python@mrabarnett.plus.com> - 2013-10-24 21:02 +0100
Re: Unlimited canvas painting program albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-07 11:30 +0000
Re: Unlimited canvas painting program Chris Angelico <rosuav@gmail.com> - 2013-11-08 00:04 +1100
Re: Unlimited canvas painting program Tim Chase <tim@thechases.com> - 2013-10-24 16:46 -0500
Re: Unlimited canvas painting program Grant Edwards <invalid@invalid.invalid> - 2013-10-24 21:51 +0000
Re: Unlimited canvas painting program Tim Chase <python.list@tim.thechases.com> - 2013-10-24 17:04 -0500
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