Often repeated array allocations

[Namespace]

On Monday, 22 July 2013 at 09:26:33 UTC, David wrote:
> Am 22.07.2013 10:41, schrieb Namespace:
>> It's part of Dgame and it's the shape draw method. The method 
>> collects
>> the vertices and give them to the vertex buffer.
>> I will try it with my current way: static stack buffer with a 
>> size of
>> 1024 and otherwise I will temporary allocate memory. But how 
>> much shapes
>> grow larger than 1024 vertices ;).
>
> This will be over 1024 vertices in no time, I am currently 
> drawing
> vertices with a size of ~500MiB depending on the terrain. The 
> CPU
> doesn't need to know of all vertices at once, so collect them 
> and upload
> them  to the GPU if they go over a certain limit and begin to 
> fill your
> buffer from the start again. I use a malloc allocated buffer, 
> its size
> is never decreased, I initially allocate an educated guess + 
> some extra
> to be safe, then if it really happens to run ot of memory I 
> simple
> resize it depending on how much is left with another educated 
> guess +
> some extra.

Hm, but Dgame isn't designed for that sort of thing. It's more 
like SFML for C++. So do you think that such Framework will ever 
use more vertices than 1024?
Anyway, if it's larger, I allocate with malloc enough memory and 
free it at the end of the scope.