plib-users

[Plib-users] Loaded ssgEntity, speed, Arrays??

[Jari J. <jar...@mo...>]

Hi, 

I'm fresh user of the PLIB and I have some questions..

I loaded one 3d object as a ssgEntity and used that for 100 separate ssgTransform. (so I could get 100 3d object to the screen to test object culling) So far so good, but speed was bit slow, I calculated that on screen triangle draw speed was (including back faces) about 600 000 to 800 000 tris/s. I was expecting at least close to 2Mtris/s (Tested with Duron800/Kyro2/win2000)

 I tried using makeDList() but no speed improvements here. I assume this object is drawn only using normal OpenGL "slowest" method and not vertex/normal/color arrays? So, how to use vertex arrays when loading normal object files (*.obj, *.dxf etc...) ??

Thanks,

JJ
      

Re: [Plib-users] Loaded ssgEntity, speed, Arrays??

[Wolfram K. <w_...@rz...>]

"Jari Jokivuori" <jar...@mo...> wrote:

>Hi,=20
>
>I'm fresh user of the PLIB and I have some questions..
>
>I loaded one 3d object as a ssgEntity and used that for 100 separate =
ssgTransform.=20
>(so I could get 100 3d object to the screen to test object culling)=20

Ok.

> I tried using makeDList() but no speed improvements here.=20

Have you tried to call

void ssgStripify ( ssgEntity *ent ) ;

This takes a bit of time, but only once. One thing game authors can do
is model in an external file format like *.obj or *.ac, load it into
PLIB (for example, using PPE, prettypoly.sf.net ), stripify it and
maybe clean it up and then save out as an *.ssg file. This will then
be loaded fast by the game and will render fast since stripified.
To stripify means to make strips and fans.

Keep us informed.

>Thanks,
>
>JJ

Bye bye,
Wolfram.

Re:[Plib-users] Loaded ssgEntity, speed, Arrays??

[Jari J. <jar...@mo...>]

>> I tried using makeDList() but no speed improvements here. 
>
>Have you tried to call
>
>void ssgStripify ( ssgEntity *ent ) ;
>
>This takes a bit of time, but only once. One thing game authors can do
>is model in an external file format like *.obj or *.ac, load it into
>PLIB (for example, using PPE, prettypoly.sf.net ), stripify it and
>maybe clean it up and then save out as an *.ssg file. This will then
>be loaded fast by the game and will render fast since stripified.
>To stripify means to make strips and fans.

Yes I tried, actually I started my journey into PLIB by modifying sgg/tux example (that shows spining tux over small land object..)
So I was and I am using flatten & striptify methods.

After those is PLIB using vertex arrays to draw or just bag of glVertex() etc. ?

Cheers,
JJ