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LOD Distance - Test and measure


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#1 Genius

Genius
  • Posts: 587

Posted 21 December 2013 - 22:50

Hi,

I start today the LOD management for my forts and i do some test to understand how it works.

The Lua code in graphics files are:

lod="graphics\folderofthemodel\nameofthelodmodel.MGM",NUMBER
Like this:
lod="graphics\firingpoint\fort\fort_01.MGM",1600

I think I found what this NUMBER is, it is related to the greatest width of the object. I use F11 view without zoom.

Some screens test (I used the model of another fort to know when I changed lod, example fort_02 use as LOD01 for fort_01)

LOD at 1600:

Vaux (distance approx. 140m)

Image


Douaumont (distance approx. 330m)

Image


Merger of the two screens:

Image

We see that the displayed size is somewhat similar.

In Blender:
Vaux has a dimension of 234m x 150m = approx 35000 m²
Douaumont a dimension of 556m x 474m = approx 264000 m²

It does not appear to have correlativity with the surface (35000/140=250 is not equal 264000/330=800), but if use the greatest width it seems to be correlated (234/140=1,67 and 556/320=1,68).

The display of the LOD distance seems to correspond approximately to: Greatest width / NUMBER x 1000 = Distance in meters.

LOD Number at 1600:
Douaumont: 556/1600x1000 = 348 m (340m in game)
Vaux: 234/1600x100 = 146 m (140m in game)

Just to confirm, LOD NUMBER at 800:

Image

Distance is approx. 670 m in game => 556/800x1000= 695 m, not exact but similar.

I also tested with my casemate (99m x 35m), with LOD NUMBER at 800, the distance in game is approx. 120 m => 99/800x1000= 124 m

Therefore to determine the lod number, must be: LOD NUMBER = Greatest width of the object / Desired distance x 1000

If other modelers want to test with their objects. :geek:

Bye
Genius
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