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DarkBASIC Professional Discussion / Does DBPro draw only the polgons in the cameras view??

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Cpt Caveman
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Posted: 17th Jun 2003 12:45
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Or is there some code/command that tells it to only draw what is on screen. I think I saw some code somewhere that does do what I ask but it was a while ago and may have been for DB Classic only. Please help.
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Andy Igoe
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Posted: 17th Jun 2003 15:10
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set object cull objectNumber,0

This command will tell DBPro not to render polygons facing away from the camera.



This code is the most primitive of all optimisation routines and will spead up most heavy 3D applications significantly.

Pneumatic Dryll
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Rob K
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Posted: 17th Jun 2003 23:48
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DBPro uses the following occlusion methods:

1) Frustrum culling. Anything outside the six clip planes (near, far, top, right, left, bottom) are not drawn. Only when the whole object is outside of that though.

2) Backface culling, polys with normals pointing away from the camera are not drawn.

Patch 6 (maybe 5) will introduce node-trees / portals which splits the world into small segments (like a series of cubes), and only draws the visible ones.

Do you want Windows menus in your DBP apps? - Get my plugin: http://snow.prohosting.com/~clone99/downloads/tpc_menus_103.zip
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Terabyte
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Posted: 18th Jun 2003 01:16
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"Patch 6 (maybe 5) will introduce node-trees / portals which splits the world into small segments (like a series of cubes), and only draws the visible ones"

Sombody from db production team to answer this please
Will it???

Info Q.&statments corect@da time of going to pres. I acept 0 responsibility for typos gramaticaly incorect txt swering or pety complant tht u hve so just piss off unles u r anserin da Q.
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OpticRealm
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Posted: 18th Jun 2003 10:31
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that "set object cull objectNumber,0" slowed me down from 45fps to 31fps. haha weird eh?
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Kevin Picone
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Posted: 18th Jun 2003 11:09
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Frobscottle:


Yes, Mike (DBS) have already built an octree + portal solution to replace the static objects commands. They are due to appear in the public release in patch 5 or 6.

l8r,
Kevin Picone
[url]www.underwaredesign.com[/url]
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Terabyte
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Posted: 18th Jun 2003 11:09 Edited at: 18th Jun 2003 11:14
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@opticrealm
Well der! the flag at the end has to be set to one for it not to draw away facing polyogns

tut

you palounka

Info Q.&statments corect@da time of going to pres. I acept 0 responsibility for typos gramaticaly incorect txt swering or pety complant tht u hve so just piss off unles u r anserin da Q.
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Terabyte
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Posted: 18th Jun 2003 11:10
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oh rite

cool

Info Q.&statments corect@da time of going to pres. I acept 0 responsibility for typos gramaticaly incorect txt swering or pety complant tht u hve so just piss off unles u r anserin da Q.
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Oliver
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Posted: 18th Jun 2003 22:19
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Was this a joke, it slowed down my game by 50 fps, no wonder, doing 65535 loops. And the objects dispear randomly! And all the object I had nicly hiden appear again!
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Andy Igoe
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Posted: 18th Jun 2003 22:40
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No it's a basic optimisation technique, I put it here as a demonstration. Of course you change the loop length to include only those objects you wish to hide

I use more game-specific techniques based upon this principle, I put it here to show the principle, not to be a magic wand

Pneumatic Dryll
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OpticRealm
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Posted: 19th Jun 2003 01:33
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you shoulda said it needed a 1

hahaha

i shall try again and post my results;

BRB
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Terabyte
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Posted: 19th Jun 2003 11:08
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i said you needed 1

Info Q.&statments corect@da time of going to pres. I acept 0 responsibility for typos gramaticaly incorect txt swering or pety complant tht u hve so just piss off unles u r anserin da Q.
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drarem
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Posted: 26th Jun 2003 23:23
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Make sure your objects are in numeric order.. this is pseudocode btw, I'm not yet DBPRO-esque..

means you maintain a visible array, to show whether one is or not visible, and have this triggered in your timer loop, so if 20 objects suddenly appear/disappear, you wont see any noticeable speedups/slowdowns..

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