Here's a simple tunnel effect I did to test out doing pixel effects with userdata. Not super inspired, but it does run at 60fps at full resolution!
P#143044 2024-03-15 02:39
Added some more motion to the effect using strided userdata operations. My intuition was that this change should effectively be free from a performance perspective, but that hasn't worked out for a few reasons:
- I can't get userdata ops to work as I expect when
u0
andu2
are not the same object. - I'm not sure stride parameters allow you to "cut out" part of
u0
? It looks to me like you always have to iterate over each element ofu0
. - Strided ops seem slow - the strided copies here seem to be ~3x the cost of non-strided copies.
So as a result this cart only runs at 20fps, unlike the original, which runs at 60fps.
P#143165 2024-03-15 17:24 ( Edited 2024-03-15 17:37)
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