I am trying to find an "area" in one of the free map sites for a height 
map for the sort of "huge" dunes you can find in some deserts, you know, 
like you usually see in a lot of movies. Unfortunately, while the sites 
provide the maps for free, there are not so nice about providing a way 
to narrow down on what you are looking for. lol Any ideas what maps I 
might want to look at?

Or, failing that, something that can generate them? The result needs to 
be importable into Bryce, probably, so I can use some if its tricks to 
make a "cleft" in the land, and a few others adjustments, then the final 
result broken up into pieces that can be imported to SL/Legend City 
(later had cheaper sims), to try to see if I can build a "surface", 
which looks real, covers an entire sim *and* can be built under. ;)

-- 
void main () {

     if version = "Vista" {
       call slow_by_half();
       call DRM_everything();
     }
     call functional_code();
   }
   else
     call crash_windows();
}

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Ok. Forget the DEM maps.. :p After finding the right ones on the GIS 
site (Why don't they link up to google maps, or something, or at least 
provide a "this is my coordinates, what map is for 'this' place?", type 
search at least? Sigh...), I found the data pretty useless, though I am 
not sure what the issue was. It ended up more.. muddy than dune like.. 
Best guess is that the data is inaccurate do to wind storms, averaging, 
or some other issue, which smeared the result, instead of generating a 
clear map. But, what ever the problem, its completely worthless.

So, that leave.. Well, a $150 product called Leveller, which I ain't 
paying for, or Bryce. Only, not really, for Bryce, since while it "does" 
generate dunes as one of its options, it has a size limit of like 
2034x2048, or something, and I need something that can be, refiguring 
the requirements, broken down into something like 256x256 blocks, each 
block 32x32/64x64 in size, or something like 8192x8192 (minimum), or 
16,384x16,384 (max resolution). Bryce produces a result that is a) too 
small, and b) doesn't have enough overall detail (i.e., basically one 
dune, not multiple "dunes").

So, anyone have some algorithms for this, or some free application that 
can do it, or... And lets you set an arbitrary map size, instead of 
being stuck with smaller ones? I haven't a clue how to even attempt to 
do the math needed myself (or the patience to spend a week trying to 
figure it out. lol).

-- 
void main () {

     if version = "Vista" {
       call slow_by_half();
       call DRM_everything();
     }
     call functional_code();
   }
   else
     call crash_windows();
}

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3D Content, and 3D Software at DAZ3D!</A>

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Hmm. Seems this is "non-trivial". You can get "close" to the right 
effect with high end products like Leveller, if you want to spend the 
cash, but most systems that do it right are MATLab based, or the like 
(same problem), due to them using cellular automata to do it. Sadly, 
even though there is one example of this you don't have to "buy" the 
article/book for, it includes a function "ripples2", which is, 
apparently, part of an external library function, or some such, which 
isn't provided in the document.

This is going to be annoying to figure out.

-- 
void main () {

     if version = "Vista" {
       call slow_by_half();
       call DRM_everything();
     }
     call functional_code();
   }
   else
     call crash_windows();
}

<A HREF='http://www.daz3d.com/index.php?refid=16130551'>Get 3D Models, 
3D Content, and 3D Software at DAZ3D!</A>

Post a reply to this message