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6 Charlie Scanlon (757) 864-2034 LaRC
7 Geotif - geolocation tools for mapping.
8 Dr. Nevan Bryant (818) 354-7236
9 Position Integrity -- Terravoid Bob Servano (714) 854-2643
10 http://www.jpl.nasa.gov/releases/98/damds3.html
12 John G. Watson (818) 354-5011 release 98-52
14 6/10/98 - problem with view culling when not looking forward. Need to
15 generate the correct matrix and work it into the calculations.
17 6/10/98 - terrain generation - add an option to try to iteratively change
18 the error tolerance to try to generate "close" to a certain
19 number of vertices so that we can have consistent size, rendering
20 speed etc. among various terrain tiles.
22 5/26/98 - Add version checking to scenery files
24 4/25/98 - Roll all of Time/sunpos.cxx into Astro/sun.cxx
26 4/21/98 - Tweak lighting parameter interpolation tables to better fit
29 4/21/98 - Make sure all .hxx files have #ifndef cplusplus #error
30 Make sure all #ifdef _FILE_H or _FILE_HXX
32 4/14/98 - Convert gl__() calls in Cockpit/ to xgl__() calls
34 12/29/97 - Add a mechanism to parse command line options
35 * (done) A simple clear-screen sky.
38 * Less detailed terrain.
39 * Texture - but no MIP-mapping.
40 * Texture - but no bilinear blending.
43 12/29/97 - sky tweaking
45 So, by building the sky in the flattened shape, we can have it be
46 very foggy at the horizon and clear blue overhead.
48 The other important feature of this model is the colours. We
49 colour each vertex of the dish individually to allow for cute
50 sunsets, a darker blue overhead than at the horizon in daylight, a
51 gradual darkening of the sky as a function of altitude for very
52 high altitude flight - into space. Also we tint the horizon more
53 in the direction of the sun so that sunset starts where the sun
54 goes down - and the sky remains blue on the opposite side of the
55 sky - then as the sun gets lower, the colour spreads outwards all
56 around the sky and the black of night creeps in slowly from the
57 opposite side of the sky from the sunset.
59 We also like to tint the bottom edge of the sky with white - even
60 in broad daylight - so it looks fuzzy - even when there is very
61 little fog to achieve that effect.
63 We use a text file that contains a lookup table relating the sun
64 angle relative to the horizon to:
66 * The colour at the top of the sky dome,
67 * The colour of the horizon nearest to the sun
68 * The colour of the horizon farthest from the sun
69 * The colour of the texture environment blend for the clouds.
72 We can then tweak that file to set up all the conditions. The
73 realtime system interpolates the horizon colours all around the edge
76 12/29/97 - Ground collision detection
78 12/29/97 - glut windows or something for panel area - consider 3d
79 panels, careful of texture memory problems.