curt
0cbbe80488
Changes to track libArray api tweaks.
2003-03-19 22:52:04 +00:00
curt
bab9af52b3
Just ignore "void" data points when doing the surface fit. I think this
...
is probably better than guessing at a value and fitting to the guessed value.
For corner points (where we *need* a value to do the fit) use the elevation
of the "closest" euclidean-wise valid point.
2003-03-19 22:51:26 +00:00
curt
869f0412a3
Updates to match libArray api changes.
2003-03-19 22:49:13 +00:00
curt
f526985854
Update counter index names to make the code more explicite.
2003-03-19 22:48:35 +00:00
curt
123fb92d40
Updates to libArray and a few interface tweaks to allow more sensible
...
handling of void (non-data) in the original DEM/SRTM.
2003-03-19 22:47:45 +00:00
david
dbdc51696e
Make sure fitted_in is always allocated, to avoid a segfault.
2003-03-19 01:59:02 +00:00
david
a0b4097f5d
Fix iterator assignment.
2003-03-19 00:30:42 +00:00
david
077f32fc60
Ignore generated files.
2003-03-19 00:28:49 +00:00
curt
119d46058b
I wrote arrayfit and it worked.
...
Then I needed to modify libArray code so that other portions of the code
could use the pre-computed fit data.
Today I discovered that arrayfit was messed up. That is now fixed.
2003-03-17 17:25:11 +00:00
curt
3b6e96a06a
Fix a problem for gcc-3.2
2003-03-17 16:31:40 +00:00
curt
06985ebabd
Changes corresponding to API changes in libArray.a
2003-03-17 04:50:40 +00:00
curt
90152df81f
Changes to support also loading a pre-computed best-fit surface to the
...
array data.
2003-03-17 04:49:47 +00:00
curt
b019a7d44a
Initial revision of utility to fit a much reduced size terrain surface
...
to a higher res data set, attempting to preserve the most important
features in the original data set. The user can specify a min and max
number of output nodes as well as a maximum error tolerance that should
not be exceeded (between the original and simplified surfaces.)
2003-03-17 04:48:50 +00:00
curt
6ca738d22d
Add src/Prep/ArrayFit/ directory.
2003-03-17 04:46:36 +00:00
curt
cde416c9f3
Initial revision of a tool that uses Michael Garland's algorithm to fit
...
a simpler TIN surface to a regular array of height values. The algorithm
is described here:
http://graphics.cs.uiuc.edu/~garland/software/terra.html
2003-03-16 21:52:10 +00:00
curt
95df768c84
Initial revision.
2003-03-16 13:46:57 +00:00
curt
68a4ac7956
Added a small test program that builds a simplified surface approximation
...
based on the terrain simplification algorithm in Michael Garlands paper
located here:
http://graphics.cs.uiuc.edu/~garland/software/terra.html
Essentially start with two triangles forming the bounding surface.
Then add the point that has the greatest error. Retriangulate.
Recalcuate errors for each remaining point, add the one with the
greatest error. Lather, rinse, repeat.
2003-03-16 13:33:04 +00:00
curt
9f73338a1f
Minor tweaks for scenery building process.
2003-03-14 22:22:48 +00:00
curt
b286e6f600
Test for newest version of nurbs++ libs (with .h extention)
2003-03-14 16:30:24 +00:00
curt
aa37052182
Check point ...
2003-03-14 01:51:18 +00:00
curt
d05fd4a8ff
Big round of cascading FG -> TG name cleanups (once you get going it's hard
...
to stop.) :-)
Also save elevations of 3d polygons into a separate lookup list when they
are loaded by the clipper.
2003-03-13 21:20:46 +00:00
curt
4abf503817
Rewrite for loops with out iterators so they are more readable.
2003-03-13 20:47:58 +00:00
curt
b66f8ce695
Minor tweaks.
2003-03-13 20:47:31 +00:00
curt
ccde971251
Added support for loading 3d polygons.
2003-03-13 20:37:51 +00:00
curt
727e512fad
Not that it should matter but change the thresholds a bit to be consistant
...
with what I do in other portions of the code.
2003-03-13 20:26:56 +00:00
curt
d70cd72fbd
Don't automatically try to preserve polygon elevations, but instead provide
...
a method() to inherit elevations from another polygon. This gives the calling
layer much more control over preserving or not preserving elevations.
2003-03-13 20:25:02 +00:00
curt
ba3114a8b5
Fixed a compile warning.
2003-03-13 20:23:15 +00:00
curt
c5ab6678f2
Added support for including height information in the intermediate polygon
...
format. The big trick was that the polygon clipper is completely 2d. So
I needed to add code to preserve the elevations in the clipped output and
fill in plausible elevations for any new points created as a result of the
clipping.
2003-03-12 21:25:35 +00:00
curt
9c85f16b5f
Working towards the ability to specify elevations for a polygon in it's
...
intermediate mode. The goal then is that these elevations would be
preserved throughout the tile construction process and the surrounding
geometry would fill in without gaps. This has potential applications for
airports and runways of course as well as roads, rivers, streams, railroads,
or any other object where we might want to control the final elevation in
advance.
2003-03-12 18:23:31 +00:00
curt
af89a8a205
Add a utility to reassemble all the array files for a 1x1 degree area and
...
write them out in a dumb ascii array format.
2003-03-11 20:22:16 +00:00
curt
7c3f6dd15d
Dohhh, I knew I would screw it up the first time. But no, I doubly screwed
...
it up. Read the rows from bottom to top rather than top to bottom and
flipped row/col ...
2003-03-11 20:21:30 +00:00
curt
c9757cb753
Add the ability to extract out an individual elev by array position rather
...
than only by lat/lon.
2003-03-11 20:20:04 +00:00
curt
b3935db989
Add back code to clip polygons against land mass. This temporarily breaks
...
the ability for roads/railways to bridge ocean, but I hope to get that fixed
soon.
2003-03-11 20:19:09 +00:00
curt
ea58728f5c
With the latest version of the libnurbs++, the include file extension has
...
changed from .hh -> .h
Generate a complete enclosing area around the airport including taxiways,
not just runways.
2003-03-11 20:17:57 +00:00
curt
1bfc2da8ee
Fix a compile problem for some platforms/compilers.
2003-03-11 16:04:49 +00:00
curt
6c26352508
Avoid telling the nurbs library to do something it can't do (resulting
...
in a segfault.)
2003-03-10 15:01:08 +00:00
curt
4bb5decbcb
A simple perl::GD script to convert .hgt to a .png for visualization purposes.
...
The explicite draw each pixel method is inefficient, but used anyway to make
it utterly clear what the data order is in the original .hgt file.
2003-03-10 14:56:12 +00:00
curt
266772ee39
Add a routine to dump out the .hgt data in a simplistic ascii format.
2003-03-10 14:54:42 +00:00
curt
bf96033516
Tweaking parameters.
2003-03-10 03:00:59 +00:00
curt
c986802faa
The resulting airport surfaces still had too much undulation from the noise
...
in the DEM data. Coarsen the nurbs grid and average some surrounding data
to hide the noise.
2003-03-09 19:19:19 +00:00
curt
846473a424
Make each representative grid point the average of a larger set of points.
2003-03-09 18:51:00 +00:00
curt
d61e2d958b
Since configure refers to these files, it seems like a good idea to actually
...
add them.
2003-03-09 18:14:19 +00:00
curt
c170e77854
Switch to calculating node elevations based on the nurbs surface rather
...
than raw dem data.
2003-03-09 18:13:53 +00:00
curt
abd30e0352
Initial revsion of testnurbs.cxx which exercises some basic capabilities of
...
the nurbs++ library.
2003-03-09 18:12:25 +00:00
curt
15ae058d4a
First stab at code to build a nurbs surface that approximates the surface
...
of an airport.
2003-03-09 18:11:29 +00:00
curt
b628d7cdd8
Add a check for the nurbs++ library.
...
Add a README.nurbs++ explaining where the nurbs++ package can be found
and a bit about what it is.
2003-03-09 18:10:32 +00:00
curt
83388f0c38
Switch to bool return types.
2003-03-09 17:27:07 +00:00
curt
0d53ec0be0
Fill in "void" data with surrounding data.
2003-03-09 17:22:22 +00:00
curt
e55881e063
More informative output.
2003-03-09 17:21:47 +00:00
curt
887297d8d0
A slightly more flexible way to find the best elevation data.
2003-03-08 03:25:05 +00:00
