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Author SHA1 Message Date
curt
5943155bad Try an idea that is hopefully slightly more intelligent about what land 
cover area to assign a "default cover" triangle to.
 2003-08-19 02:51:08 +00:00
curt
4ff5acb28c Still support a minimum angle threshold for quality refinement in the 
trangulator wrapper, but this isn't used by the calling layer any more.
 2003-08-19 02:38:08 +00:00
curt
fe6ff15206 Remove --min-angle option. 2003-08-19 02:36:10 +00:00
curt
730c454320 - Test a different approach for assigning land cover attributes to "default' 
cover" areas.  Rather than artificially cut in polygon areas, just lookup
  a land cover type for unassigned triangles.  I think this has potential, but
  it needs more work to eliminate some odd artifacts.

- Revove --min-angle= option.

- Don't re-fit() triangle array to try to achieve a particular range of
  node quantities ... this is all pre-computed with a much smarter, much
  more efficient algorithm.
 2003-08-19 02:35:35 +00:00
curt
f5f961b8c0 Remove support for a "minimum triangle angle" quality constraint when 
triangulating a tile.  A better strategy is to have better input that doesn't
need to hide behind this trick.
 2003-08-19 02:32:11 +00:00
curt
eb3a3a4fa2 Update examples. 2003-08-19 02:30:05 +00:00
curt
efbe6af104 calc_tex_coords() -> sgCalcTexCoords() 2003-08-19 02:29:44 +00:00
curt
0b4b91c90f Unraise the verbosity level. 2003-08-19 02:27:08 +00:00
curt
b2d808f214 Tweak an output message. 2003-08-19 02:26:43 +00:00
curt
39222a737e Handle .zip'd SRTM data files directly. 2003-08-19 02:25:48 +00:00
curt
aec29df1c8 Working towards completely depricating the previous insanely stupid array fit 
algorithm.
 2003-08-19 02:24:38 +00:00
curt
af6dc9bb0d Various parameter tweaks. 2003-08-19 02:23:25 +00:00
curt
d0f17a2cd7 Fix for properly handling SRTM voids ... terrafit.py rescales the data range 
so that all the values are positive this make things a little trickier inside
terra.
 2003-08-16 16:28:55 +00:00
curt
9ab16521f4 Minor tweaks for better debugging/monitoring 2003-08-16 15:39:59 +00:00
curt
ad75df026d Ignore SRTM "void" values. 2003-08-16 14:53:00 +00:00
curt
a20d85ac0d Picky, picky :-) 2003-08-16 02:09:06 +00:00
curt
eb04a8771d Initial revision. 2003-08-16 01:59:37 +00:00
curt
bf32c9e447 Fix a compile error. 2003-08-16 01:58:15 +00:00
curt
df54cff836 The TerraGear version of Michael Garland's "Terra" program now supports 
minnodes directly, so I have slightly tweaked the python wrapper script
in light of this.
 2003-08-16 01:57:28 +00:00
curt
9e38f10dc6 Add src/Prep/Terra and src/Prep/TerraFit 2003-08-16 01:48:38 +00:00
curt
37d4e6f738 - Various tweaks to make the code build with gcc-2.95 under linux. 
- added a -n <num> option to specify a minimum number of nodes to emit
  irregardless of the error threshold.
 2003-08-16 01:38:22 +00:00
curt
1a3c24506b Original version of Michael Garlands terra program version 0.7 (public domain) 2003-08-16 01:35:54 +00:00
curt
d309a52bee Intial revision. 2003-08-16 01:18:39 +00:00
curt
170783ea73 The terrafit stuff is getting a much deserved and belated promotion ... 2003-08-16 01:18:01 +00:00
curt
533db6e82d Initial revision. 2003-06-12 20:05:01 +00:00
curt
c148689adc Fixes to match changes in SimGear-0.3.3 2003-06-12 20:02:08 +00:00
curt
05c765b397 - Make the bucket/dem coverage check slightly fuzzy in case of slight 
numerical rounding errors.
- Convert several usages of int = 0 or 1 to bool = false or true
 2003-06-12 20:01:34 +00:00
curt
f7a4a8bfa0 Rainer Emrich: 
Updates to DEM parser to make it more compliant with the spec.
 2003-04-02 17:39:46 +00:00
david
3169a0255f Roll out the last changes, since they were making far too narrow 
polygons out of roads.
 2003-04-02 16:39:52 +00:00
curt
07d17d2536 Initial revision of a scipt that leverages the "terra" utility to 
impliment essentially the same thing as "ArrayFit".   Requires the terra
program, but the terrafit.py script should take care of the pre/post
processing.
 2003-03-31 20:10:27 +00:00
david
51d5fe00ea Install arrayfit along with the other utilities. 2003-03-20 14:50:54 +00:00
david
67ea97f704 Oops -- the array wasn't being read when there was no *.fit file (my fault). 2003-03-20 14:50:33 +00:00
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