DS poly limits??

seantree

I've been playing through FFXII Revenant Wings and am totally in love with the environments in the game. I was wondering when creating a level to DS specs what is the recommended poly count? sorry if it's been asked before. I never get what I'm looking for with the search function.

leilei

http://boards.polycount.net/showflat.php?Cat=0&Number=87756&an=0&page=0#Post87756

Prs-Phil

2048 polys that may be, for both screens total, at the same time

Ryan Clark

It's a bit stricter than a recommendation.

Default behavior will render the first 2048 triangles, and unceremoniously drop the rest. So if you exceed the limit, you'll see triangle-shaped holes in your scene.

In practice, this means you'll need to control your visible polycount tightly, or else aim for an average well below 2048, to reduce the chance that a momentary spike will exceed the limit.

There's also a limit on the number of polys in each horizontal scanline. If you exceed it, you'll see missing horizontal segments.

ElysiumGX

[ QUOTE ]
2048 polys that may be, for both screens total, at the same time

[/ QUOTE ]

for both screens total, but rendering 3D onto both screens at once reduces the frame rate by half, from an average of 60, to 30. still not bad depending on the game, but most I've seen stick with keeping 3D to one at a time.

having that polycount restriction isn't a problem when you use close camera angles like revenant wings does, rendering small areas at any time. great looking game.

Ryan Clark

At 60fps, you can render 2048 polys on a single screen.

At 30fps, you can render 2048 polys on each screen.

ElysiumGX

ah, thanks for confirming that. wasn't sure. the DS is more powerful than I assumed, and I've made art for homebrew games. time to up my counts. :P

Steve Schulze

[ QUOTE ]
There's also a limit on the number of polys in each horizontal scanline. If you exceed it, you'll see missing horizontal segments.

[/ QUOTE ]8 polys, to be precised. This can usually be fixed with some judicious tesselation.

locus

Actually that 2048 triangles is based on "clipped visible triangles". If you model a large triangle that is clipped against the borders of the screen; it can potentially create more triangles.. So 2048 is not exactly accurate.

Imagine a triangle where one of the corners is off the screen. After clipping the triangle you end up with a visible quad which is then triangulated into two triangles. So be careful with creating an entire scene of massive triangles because half of your scene will likely not draw.

ps: leave triangle room for the programmers; they'll need a few polygons for HUD and other elements like reticles and screen overlays.

Bruno Afonseca

what about sprite limits?

Ryan Clark

128 sprites per screen. The sprites can render in front of your 3D scene, or behind it.

http://www.google.com/search?hl=en&safe=off&hs=wob&q="ds+sprite+limit"&btnG=Search