On 2013-10-24, Tim Chase <t...@thechases.com> wrote:
> On 2013-10-24 12:16, markot...@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.
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