enhancement - azimuthal grid + equatorial / galactic grid (low) #60

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1. johndpope commented on Dec 3, 2017

   

   johndpope

   on Dec 3, 2017

   Last edited by johndpope

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   once we can work out one - should all fall into place.
   Of course - this won't look like this in augmented solar system.
   just 3d view wrapped around the earth sphere.

   

   
2. johndpope commented on Dec 3, 2017

   

   johndpope

   on Dec 3, 2017

   Last edited by johndpope

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   I wonder how this would look in 3d.

   

   
3. johndpope

   changed the title [-]enhancement - azimuthal grid + equatorial grid (low)[/-] [+]enhancement - azimuthal grid + equatorial / galactic grid (low)[/+] on Dec 3, 2017
4. johndpope commented on Dec 4, 2017

   

   johndpope

   on Dec 4, 2017

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   from cosmographia 3d scene is available for this grid https://github.com/johndpope/cosmographia

   
   
5. johndpope commented on Feb 28, 2018

   

   johndpope

   on Feb 28, 2018

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   http://worldwidetelescope.org/webclient/

   

   https://github.com/jzuhone/openwwt-windows-client/blob/master/WWTCore/WWTCore/Constants.cs

   EquatorialGrid, EquatorialGridText, GalacticGrid, GalacticGridText, EclipticGrid
6. johndpope commented on Feb 28, 2018

   

   johndpope

   on Feb 28, 2018

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   https://github.com/cardinot/celestia/blob/bc9403d55fa592a7fc9a7a694aec783e9f62a37f/celestia/src/celengine/skygrid.cpp

   // The maximum number of parallels or meridians that will be visible
   const double MAX_VISIBLE_ARCS = 10.0;
   
   // Number of line segments used to approximate one arc of the celestial sphere
   const int ARC_SUBDIVISIONS = 100;
   
   // Size of the cross indicating the north and south poles
   const double POLAR_CROSS_SIZE = 0.01;
   
   // Grid line spacing tables
   static const int MSEC = 1;
   static const int SEC = 1000;
   static const int MIN = 60 * SEC;
   static const int DEG = 60 * MIN;
   static const int HR  = 60 * MIN;
   
   static const int HOUR_MIN_SEC_TOTAL = 24 * HR;
   static const int DEG_MIN_SEC_TOTAL  = 180 * DEG;
   
   static const int HOUR_MIN_SEC_SPACING[] =
   {
       2*HR,
       1*HR,
       30*MIN,
       15*MIN,
       10*MIN,
       5*MIN,
       3*MIN,
       2*MIN,
       1*MIN,
       30*SEC,
       15*SEC,
       10*SEC,
       5*SEC,
       3*SEC,
       2*SEC,
       1*SEC,
       500*MSEC,
       200*MSEC,
       100*MSEC
   };
   
   static const int DEG_MIN_SEC_SPACING[]  =
   {
       30*DEG,
       15*DEG,
       10*DEG,
       5*DEG,
       3*DEG,
       2*DEG,
       1*DEG,
       30*MIN,
       15*MIN,
       10*MIN,
       5*MIN,
       3*MIN,
       2*MIN,
       1*MIN,
       30*SEC,
       15*SEC,
       10*SEC,
       5*SEC,
       3*SEC,
       2*SEC,
       1*SEC,
       500*MSEC,
       200*MSEC,
       100*MSEC
   };