//
// Copyright (C) 1997-2000 Curtis L. Olson - curt@flightgear.org
//
-// 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 library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library 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
+// This library 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.
+// Library 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.
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the
+// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+// Boston, MA 02111-1307, USA.
//
// $Id$
SGMoon *moon;
SGStars *planets;
SGStars *stars;
+ ssgSimpleState *cloud_mats[SG_MAX_CLOUD_TYPES];
layer_list_type cloud_layers;
ssgRoot *pre_root, *post_root;
// near cloud visibility state variables
bool in_puff;
- double puff_length;
- double puff_progression;
- double ramp_up;
- double ramp_down;
+ double puff_length; // in seconds
+ double puff_progression; // in seconds
+ double ramp_up; // in seconds
+ double ramp_down; // in seconds
public:
// transition range, and simulated "puffs".
void modify_vis( float alt, float time_factor );
- // draw background portions of the sky
- void draw_background();
+ // draw background portions of the sky ... do this before you draw
+ // the rest of your scene.
+ void preDraw();
- // draw scenery elements of the sky
- void draw_scene( float alt );
+ // draw translucent clouds ... do this after you've drawn all the
+ // oapaque elements of your scene.
+ void postDraw( float alt );
// specify the texture path (optional, defaults to current directory)
inline void texture_path( const string& path ) {
}
// add a cloud layer (above sea level in meters)
- void add_cloud_layer( double asl, double thickness, double transition,
+ void add_cloud_layer( double asl, double thickness,
+ double transition, double span,
SGCloudType type );
+ void add_cloud_layer( double asl, double thickness,
+ double transition, double span,
+ const string &tex_path );
+ void add_cloud_layer( double asl, double thickness,
+ double transition, double span,
+ ssgSimpleState *state );
inline int get_num_layers() const { return cloud_layers.size(); }
inline SGCloudLayer *get_cloud_layer( int i ) const {