//
// Copyright (C) 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.
//
// $Id$
#ifndef _SG_CLOUD_HXX_
#define _SG_CLOUD_HXX_
+#include <simgear/compiler.h>
#include <plib/ssg.h>
-#include <simgear/misc/fgpath.hxx>
+#include STL_STRING
+SG_USING_STD(string);
class SGCloudLayer {
- ssgRoot *layer_root;
- ssgTransform *layer_transform;
- ssgSimpleState *layer_state;
+public:
- ssgColourArray *cl;
- ssgVertexArray *vl;
- ssgTexCoordArray *tl;
+ enum Type {
+ SG_CLOUD_OVERCAST = 0,
+ SG_CLOUD_MOSTLY_CLOUDY,
+ SG_CLOUD_MOSTLY_SUNNY,
+ SG_CLOUD_CIRRUS,
+ SG_CLOUD_CLEAR,
+ SG_MAX_CLOUD_TYPES
+ };
- // height above sea level (meters)
- float layer_asl;
- float layer_thickness;
- float layer_transition;
- float size;
- float scale;
+ // Constructors
+ SGCloudLayer( const string &tex_path );
- // for handling texture coordinates to simulate cloud movement
- // from winds, and to simulate the clouds being tied to ground
- // position, not view position
- // double xoff, yoff;
- double last_lon, last_lat;
+ // Destructor
+ ~SGCloudLayer( void );
-public:
+ float getSpan_m () const;
+ void setSpan_m (float span_m);
- // Constructor
- SGCloudLayer( void );
+ float getElevation_m () const;
+ void setElevation_m (float elevation_m);
- // Destructor
- ~SGCloudLayer( void );
+ float getThickness_m () const;
+ void setThickness_m (float thickness_m);
+
+ float getTransition_m () const;
+ void setTransition_m (float transition_m);
+
+ Type getType () const;
+ void setType (Type type);
// build the cloud object
- void build( FGPath path, double size, double asl, double thickness,
- double transition );
+ void rebuild();
// repaint the cloud colors based on current value of sun_angle,
// sky, and fog colors. This updates the color arrays for
// draw the cloud layer
void draw();
- inline float get_asl() const { return layer_asl; }
- inline float get_thickness() const { return layer_thickness; }
- inline float get_transition() const { return layer_transition; }
+private:
+
+ static ssgSimpleState *layer_states[SG_MAX_CLOUD_TYPES];
+ static int layer_sizes[SG_MAX_CLOUD_TYPES];
+
+ ssgRoot *layer_root;
+ ssgTransform *layer_transform;
+ ssgLeaf * layer;
+
+ ssgColourArray *cl;
+ ssgVertexArray *vl;
+ ssgTexCoordArray *tl;
+
+ // height above sea level (meters)
+ SGPath texture_path;
+ float layer_span;
+ float layer_asl;
+ float layer_thickness;
+ float layer_transition;
+ Type layer_type;
+ float scale;
+
+ // for handling texture coordinates to simulate cloud movement
+ // from winds, and to simulate the clouds being tied to ground
+ // position, not view position
+ // double xoff, yoff;
+ double last_lon, last_lat;
+
};
+// make an ssgSimpleState for a cloud layer given the named texture
+ssgSimpleState *SGCloudMakeState( const string &path );
+
+
#endif // _SG_CLOUD_HXX_