[not a bug] Irr render - draw3dline and others ...

dmitrii · Post by **dmitrii** » Mon Nov 27, 2006 8:19 pm

this functions are real ****

i do my debug for ways maps with draw3dline
and what i see ? bugs with fps...

for example load to irrlicht a lot of objects
set to all objects wireframe mode
after that load irrlicht with directx 9.0 and NVPerfHUD

screens from my project

with draw3dlines :

DP calls = 12771

with out them :

DP calls = 273 (it's normal)

in most games dp calls ~1000

hybrid · Post by **hybrid** » Mon Nov 27, 2006 9:53 pm

What does this post mean? And why do you think that unsupported hardware will tell you any significant?

Acki · Post by **Acki** » Mon Nov 27, 2006 11:46 pm

Right, where is the bug !?!?!

dmitrii · Post by **dmitrii** » Tue Nov 28, 2006 4:54 am

i only ask why irr render draw one line in one request to video card
it's very slowly method

vitek · Post by **vitek** » Tue Nov 28, 2006 6:40 am

I don't really see any 3D lines in either of your screenshots...

If you call draw3DLine to draw a single line, Irrlicht will ask the driver to draw that one line. If you want to draw more than one line with a single call, then you need to manage your own vertex and index buffers [you can use an SMeshBuffer for this] and call driver->drawVertexPrimitiveList() with EPT_LINE_STRIP or EPT_LINES.

The downside is that this method only works with the D3D and OGL drivers.

Travis

Acki · Post by **Acki** » Tue Nov 28, 2006 3:48 pm

But still, where is the bug, for this thread is supposed to be in the bugs forum ???

hybrid · Post by **hybrid** » Tue Nov 28, 2006 4:42 pm

The bug might be one where the driver was supposed to batch primitive draws but does not do so. However, Irrlicht does not batch anything across methods so it's up to you to make the line drawing more efficient. Simply follow vitek's advice.