Optimizing

[Knightmare]

[mh]

[Knightmare]

D'oh, missed that! Got it working now. Thanks.

GL_LIGHTMAP_FORMAT is already set to GL_BRRA. I changed from GL_UNSIGNED_BYTE to GL_UNSIGNED_INT_8_8_8_8_REV, but there was not noticeable improvement.

[mh]

Yeah, it's much the same on NVIDIA. Where it really flies it with AMD and - especially - Intel. All the same, it does suggest that you still have something of a bottleneck somewhere else.

[Knightmare]

This is on a GTX 285, so I guess there shouldn't be any visible difference.

As an alternative to using texture arrays for lightmaps, would increasing the block size from 128x128 to 256x256 be a good idea? This would increase the batchability of surfaces by having fewer with different lightmap images, and thus need fewer rendering calls, but it might increase the bandwidth used for updating the lightmaps.

[leileilol]

phew

good thing the engine i'm concerned with when I started this thread doesn't even update lightmaps


Is there any performance worries if I switch my muzzleflashes to a pair of autosprites, one being an autosprite2, instead of a standard polygon blob/half-circle flash?

[r00k]

Ugh, my head hurts.
I tried converting the lightmap updates to GL_BGRA and GL_UNSIGNED_INT_8_8_8_8_REV, still doing something wrong.
changed the order of the colors, added an alpha channel to the lightmap array, multiply by 4 instead of 3 etc
I still get garbled rainbow lights. The only evidence i was onthe right track was once i had muzzleflashes working... ugh!
Back to square one and attempt again.. :/

[mh]

[r00k]

K thanks,
i saw unsigned blocklights[MAX_LIGHTMAP_SIZE*3];
and this
byte lightmaps[4*MAX_LIGHTMAPS*LIGHTMAP_BLOCK_WIDTH*LIGHTMAP_BLOCK_HEIGHT];

i which confused me. block lights kinda tie into stride but it gets all fuzzy...

[Spike]

its only the lightmaps array that needs to be *4.
and the only bit of code that needs to care what format the hardware is to be fed is the code that copies+downshifts from blocklights into lightmaps and the glTexSubImage call.
the rest should generally be *3 if you've got lit support, and *1 otherwise.

[r00k]

Ack wait stop the presses!
In debug mode it finally works, select release rebuild the flashes are green and the lits are purple ugh!


LeiLei i would think there would be better performance in autosprites (2d) vs muzzleflash polygon orb. Though sometimes billboard/sprite muzzle flashes tend to lag a bit behind as the player moves