77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
// moon.hxx -- model earth's moon
|
|
//
|
|
// Written by Durk Talsma. Originally started October 1997, for distribution
|
|
// with the FlightGear project. Version 2 was written in August and
|
|
// September 1998. This code is based upon algorithms and data kindly
|
|
// provided by Mr. Paul Schlyter. (pausch@saaf.se).
|
|
//
|
|
// Separated out rendering pieces and converted to ssg by Curt Olson,
|
|
// March 2000
|
|
//
|
|
// This program is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU General Public License as
|
|
// published by the Free Software Foundation; either version 2 of the
|
|
// License, or (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful, but
|
|
// WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
//
|
|
// $Id$
|
|
|
|
|
|
#ifndef _SG_MOON_HXX_
|
|
#define _SG_MOON_HXX_
|
|
|
|
|
|
#include <plib/ssg.h>
|
|
|
|
#include <simgear/misc/fgpath.hxx>
|
|
|
|
|
|
class SGMoon {
|
|
|
|
ssgTransform *moon_transform;
|
|
ssgSimpleState *orb_state;
|
|
ssgSimpleState *halo_state;
|
|
|
|
ssgColourArray *cl;
|
|
|
|
ssgVertexArray *halo_vl;
|
|
ssgTexCoordArray *halo_tl;
|
|
|
|
public:
|
|
|
|
// Constructor
|
|
SGMoon( void );
|
|
|
|
// Destructor
|
|
~SGMoon( void );
|
|
|
|
// build the moon object
|
|
ssgBranch *build( FGPath path, double moon_size );
|
|
|
|
// repaint the moon colors based on current value of moon_anglein
|
|
// degrees relative to verticle
|
|
// 0 degrees = high noon
|
|
// 90 degrees = moon rise/set
|
|
// 180 degrees = darkest midnight
|
|
bool repaint( double moon_angle );
|
|
|
|
// reposition the moon at the specified right ascension and
|
|
// declination, offset by our current position (p) so that it
|
|
// appears fixed at a great distance from the viewer. Also add in
|
|
// an optional rotation (i.e. for the current time of day.)
|
|
bool reposition( sgVec3 p, double angle,
|
|
double rightAscension, double declination,
|
|
double moon_dist );
|
|
};
|
|
|
|
|
|
#endif // _SG_MOON_HXX_
|