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DarkBASIC Professional Discussion / vareiable detail levels in the levels

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Plugged
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Posted: 30th Nov 2003 20:13
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in the lastest games such as halo if you look at the ground the ground near you has i very detailed texture and as you look further alway the detail gets then as you move the area of high detail moves with you. can you do this is dbp and if so how would you go about programming it.

woody

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Slayer
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Posted: 30th Nov 2003 20:44
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load image "",1,flag set flag to 1 to get what you wont.
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Oliver
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Posted: 30th Nov 2003 20:47 Edited at: 30th Nov 2003 20:48
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[edit] Slayer posted first

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Rob K
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Posted: 30th Nov 2003 20:47
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Quote: "in the lastest games such as halo if you look at the ground the ground near you has i very detailed texture and as you look further alway the detail gets then as you move the area of high detail moves with you. can you do this is dbp and if so how would you go about programming it."


Reducing texture detail is known as mipmapping, and is done by DBP automatically.

Adjusting the level of detail of 3D geometry is more complex, I don't know if HALO does this or not. A very simple way of doing this is to create a high and low poly version of the objects in your scene and swapping the objects once it goes a certain distance from the camera.


BLUE GUI Plugin: http://blue.robert-knight.net / BLUE IDE [href]http://blueide.sf.net/ - Replacement editor for DBPro[/href]
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Rob K
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Posted: 30th Nov 2003 20:48
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Quote: " I have no idea, though i saw this in the bl*tz3d demos, so it must be possible in DB"


Mipmapping yes, LOD terrains (where the ground is more complex near the front that at the back) is not possible.


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Ian T
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Posted: 1st Dec 2003 10:12 Edited at: 1st Dec 2003 10:12
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Mipmapping depends on your videocard. It's possible Halo forces mipmapping settings, so if you've got them natively off, it switches them on anyways. Change your video card settings if you want to see this in DBP.

Halo does indeed use LOD (Leve Of Detail) for its game objects (cars, players, etc), but not for its terrain. There are a number of ways to going about using levels of detail for your objects. A simple one would to be make a low and high detail version, and if the camera is a certain distance away from the object, replace it with the low detail version; or simply show the low and hide the high.

(Another good example why object groups would be useful in DBP)

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A very nice %it, indeed.
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Van B
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Posted: 1st Dec 2003 13:58
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It'd be good practice to have a lower poly version of all your objects, then use an LOD system, which is not really as big a deal as it sounds, just check the distance from the camera and decide which object to show or hide. However, another concearn is texture resolution, it might be beneficial to have low and high res versions of your texture, and use the same LOD style system - a low res texture LOD can often reap the same (or better) speed benefits of a low poly system.

Another huge factor in all this is collision, if you check for collision on your low poly objects all the time, then your collision system will be much quicker, things like checking occlusion, only checking nearby objects etc can again improve speed a great deal.


Van-B


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