#include "newbucket.hxx"
+// default constructor
+SGBucket::SGBucket() {
+}
+
+
+// constructor for specified location
+inline SGBucket::SGBucket(const double dlon, const double dlat) {
+ set_bucket(dlon, dlat);
+}
+
+
+// create an impossible bucket if false
+inline SGBucket::SGBucket(const bool is_good) {
+ set_bucket(0.0, 0.0);
+ if ( !is_good ) {
+ lon = -1000;
+ }
+}
+
+
+// Parse a unique scenery tile index and find the lon, lat, x, and y
+inline SGBucket::SGBucket(const long int bindex) {
+ long int index = bindex;
+
+ lon = index >> 14;
+ index -= lon << 14;
+ lon -= 180;
+
+ lat = index >> 6;
+ index -= lat << 6;
+ lat -= 90;
+
+ y = index >> 3;
+ index -= y << 3;
+
+ x = index;
+}
+
+
+// default destructor
+inline SGBucket::~SGBucket() {
+}
+
+
+// Set the bucket params for the specified lat and lon
+void SGBucket::set_bucket( double *lonlat ) {
+ set_bucket( lonlat[0], lonlat[1] );
+}
+
+
+// Set the bucket params for the specified lat and lon
+void SGBucket::set_bucket( double dlon, double dlat ) {
+ //
+ // latitude first
+ //
+ double span = sg_bucket_span( dlat );
+ double diff = dlon - (double)(int)dlon;
+
+ // cout << "diff = " << diff << " span = " << span << endl;
+
+ if ( (dlon >= 0) || (fabs(diff) < FG_EPSILON) ) {
+ lon = (int)dlon;
+ } else {
+ lon = (int)dlon - 1;
+ }
+
+ // find subdivision or super lon if needed
+ if ( span < FG_EPSILON ) {
+ // polar cap
+ lon = 0;
+ x = 0;
+ } else if ( span <= 1.0 ) {
+ x = (int)((dlon - lon) / span);
+ } else {
+ if ( (dlon >= 0) || (fabs(diff) < FG_EPSILON) ) {
+ lon = (int)( (int)(lon / span) * span);
+ } else {
+ // cout << " lon = " << lon
+ // << " tmp = " << (int)((lon-1) / span) << endl;
+ lon = (int)( (int)((lon + 1) / span) * span - span);
+ if ( lon < -180 ) {
+ lon = -180;
+ }
+ }
+ x = 0;
+ }
+
+ //
+ // then latitude
+ //
+ diff = dlat - (double)(int)dlat;
+
+ if ( (dlat >= 0) || (fabs(diff) < FG_EPSILON) ) {
+ lat = (int)dlat;
+ } else {
+ lat = (int)dlat - 1;
+ }
+ y = (int)((dlat - lat) * 8);
+}
+
+
// Build the path name for this bucket
-string FGBucket::gen_base_path() const {
+string SGBucket::gen_base_path() const {
// long int index;
int top_lon, top_lat, main_lon, main_lat;
char hem, pole;
}
+// return width of the tile in degrees
+double SGBucket::get_width() const {
+ return sg_bucket_span( get_center_lat() );
+}
+
+
+// return height of the tile in degrees
+double SGBucket::get_height() const {
+ return SG_BUCKET_SPAN;
+}
+
+
// return width of the tile in meters
-double FGBucket::get_width_m() const {
+double SGBucket::get_width_m() const {
double clat = (int)get_center_lat();
if ( clat > 0 ) {
clat = (int)clat + 0.5;
double local_perimeter = 2.0 * local_radius * FG_PI;
double degree_width = local_perimeter / 360.0;
- return bucket_span( get_center_lat() ) * degree_width;
+ return sg_bucket_span( get_center_lat() ) * degree_width;
}
// return height of the tile in meters
-double FGBucket::get_height_m() const {
+double SGBucket::get_height_m() const {
double perimeter = 2.0 * EQUATORIAL_RADIUS_M * FG_PI;
double degree_height = perimeter / 360.0;
- return FG_BUCKET_SPAN * degree_height;
+ return SG_BUCKET_SPAN * degree_height;
}
// X & Y direction. We need the current lon and lat to resolve
// ambiguities when going from a wider tile to a narrower one above or
// below. This assumes that we are feeding in
-FGBucket fgBucketOffset( double dlon, double dlat, int dx, int dy ) {
- FGBucket result( dlon, dlat );
- double clat = result.get_center_lat() + dy * FG_BUCKET_SPAN;
+SGBucket sgBucketOffset( double dlon, double dlat, int dx, int dy ) {
+ SGBucket result( dlon, dlat );
+ double clat = result.get_center_lat() + dy * SG_BUCKET_SPAN;
// walk dy units in the lat direction
result.set_bucket( dlon, clat );
// find the lon span for the new latitude
- double span = bucket_span( clat );
+ double span = sg_bucket_span( clat );
// walk dx units in the lon direction
double tmp = dlon + dx * span;
// calculate the offset between two buckets
-void fgBucketDiff( const FGBucket& b1, const FGBucket& b2, int *dx, int *dy ) {
+void sgBucketDiff( const SGBucket& b1, const SGBucket& b2, int *dx, int *dy ) {
// Latitude difference
double c1_lat = b1.get_center_lat();
double diff_lat = c2_lat - c1_lat;
#ifdef HAVE_RINT
- *dy = (int)rint( diff_lat / FG_BUCKET_SPAN );
+ *dy = (int)rint( diff_lat / SG_BUCKET_SPAN );
#else
if ( diff_lat > 0 ) {
- *dy = (int)( diff_lat / FG_BUCKET_SPAN + 0.5 );
+ *dy = (int)( diff_lat / SG_BUCKET_SPAN + 0.5 );
} else {
- *dy = (int)( diff_lat / FG_BUCKET_SPAN - 0.5 );
+ *dy = (int)( diff_lat / SG_BUCKET_SPAN - 0.5 );
}
#endif
double c2_lon = b2.get_center_lon();
double diff_lon = c2_lon - c1_lon;
double span;
- if ( bucket_span(c1_lat) <= bucket_span(c2_lat) ) {
- span = bucket_span(c1_lat);
+ if ( sg_bucket_span(c1_lat) <= sg_bucket_span(c2_lat) ) {
+ span = sg_bucket_span(c1_lat);
} else {
- span = bucket_span(c2_lat);
+ span = sg_bucket_span(c2_lat);
}
#ifdef HAVE_RINT
-#define FG_BUCKET_SPAN 0.125 // 1/8 of a degree
-#define FG_HALF_BUCKET_SPAN 0.0625 // 1/2 of 1/8 of a degree = 1/16 = 0.0625
+#define SG_BUCKET_SPAN 0.125 // 1/8 of a degree
+#define SG_HALF_BUCKET_SPAN 0.0625 // 1/2 of 1/8 of a degree = 1/16 = 0.0625
-class FGBucket;
-ostream& operator<< ( ostream&, const FGBucket& );
-bool operator== ( const FGBucket&, const FGBucket& );
-
-class FGBucket {
-
-private:
- double cx, cy; // centerpoint (lon, lat) in degrees of bucket
- int lon; // longitude index (-180 to 179)
- int lat; // latitude index (-90 to 89)
- int x; // x subdivision (0 to 7)
- int y; // y subdivision (0 to 7)
-
-public:
-
- // default constructor
- FGBucket();
-
- // create a bucket which would contain the specified lon/lat
- FGBucket(const double lon, const double lat);
-
- // create a bucket based on "long int" index
- FGBucket(const long int bindex);
-
- // create an impossible bucket if false
- FGBucket(const bool is_good);
-
- ~FGBucket();
-
- // Set the bucket params for the specified lat and lon
- void set_bucket( double dlon, double dlat );
- void set_bucket( double *lonlat ) {
- set_bucket( lonlat[0], lonlat[1] );
- }
-
- void make_bad ( void );
-
- // Generate the unique scenery tile index for this bucket
- long int gen_index() const;
- string gen_index_str() const;
-
- // Build the path name for this bucket
- string gen_base_path() const;
-
- // return the center lon of a tile
- double get_center_lon() const;
-
- // return width of the tile in degrees
- double get_width() const;
- // return width of the tile in meters
- double get_width_m() const;
- // return height of the tile in degrees
- double get_height() const;
- // return height of the tile in meters
- double get_height_m() const;
-
- // return the center lat of a tile
- double get_center_lat() const;
-
-
- // Informational methods
- inline int get_lon() const { return lon; }
- inline int get_lat() const { return lat; }
- inline int get_x() const { return x; }
- inline int get_y() const { return y; }
-
- // friends
- friend ostream& operator<< ( ostream&, const FGBucket& );
- friend bool operator== ( const FGBucket&, const FGBucket& );
-};
+class SGBucket;
+ostream& operator<< ( ostream&, const SGBucket& );
+bool operator== ( const SGBucket&, const SGBucket& );
// return the horizontal tile span factor based on latitude
-inline double bucket_span( double l ) {
+inline double sg_bucket_span( double l ) {
if ( l >= 89.0 ) {
return 360.0;
} else if ( l >= 88.0 ) {
}
-// Set the bucket params for the specified lat and lon
-inline void FGBucket::set_bucket( double dlon, double dlat ) {
- //
- // latitude first
- //
- double span = bucket_span( dlat );
- double diff = dlon - (double)(int)dlon;
-
- // cout << "diff = " << diff << " span = " << span << endl;
-
- if ( (dlon >= 0) || (fabs(diff) < FG_EPSILON) ) {
- lon = (int)dlon;
- } else {
- lon = (int)dlon - 1;
- }
+class SGBucket {
- // find subdivision or super lon if needed
- if ( span < FG_EPSILON ) {
- // polar cap
- lon = 0;
- x = 0;
- } else if ( span <= 1.0 ) {
- x = (int)((dlon - lon) / span);
- } else {
- if ( (dlon >= 0) || (fabs(diff) < FG_EPSILON) ) {
- lon = (int)( (int)(lon / span) * span);
- } else {
- // cout << " lon = " << lon
- // << " tmp = " << (int)((lon-1) / span) << endl;
- lon = (int)( (int)((lon + 1) / span) * span - span);
- if ( lon < -180 ) {
- lon = -180;
- }
- }
- x = 0;
- }
+private:
+ double cx, cy; // centerpoint (lon, lat) in degrees of bucket
+ int lon; // longitude index (-180 to 179)
+ int lat; // latitude index (-90 to 89)
+ int x; // x subdivision (0 to 7)
+ int y; // y subdivision (0 to 7)
- //
- // then latitude
- //
- diff = dlat - (double)(int)dlat;
+public:
- if ( (dlat >= 0) || (fabs(diff) < FG_EPSILON) ) {
- lat = (int)dlat;
- } else {
- lat = (int)dlat - 1;
- }
- y = (int)((dlat - lat) * 8);
-}
+ // default constructor
+ inline SGBucket();
+ // constructor for specified location
+ inline SGBucket(const double dlon, const double dlat);
-// default constructor
-inline FGBucket::FGBucket() {}
+ // create an impossible bucket if false
+ inline SGBucket(const bool is_good);
+ // Parse a unique scenery tile index and find the lon, lat, x, and y
+ inline SGBucket(const long int bindex);
-// constructor for specified location
-inline FGBucket::FGBucket(const double dlon, const double dlat) {
- set_bucket(dlon, dlat);
-}
+ // default destructor
+ inline ~SGBucket();
+ // Set the bucket params for the specified lat and lon
+ void set_bucket( double dlon, double dlat );
+ void set_bucket( double *lonlat );
-// create an impossible bucket if false
-inline FGBucket::FGBucket(const bool is_good) {
- set_bucket(0.0, 0.0);
- if ( !is_good ) {
+ // create an impossible bucket
+ inline void SGBucket::make_bad( void ) {
+ set_bucket(0.0, 0.0);
lon = -1000;
}
-}
-
-
-// Parse a unique scenery tile index and find the lon, lat, x, and y
-inline FGBucket::FGBucket(const long int bindex) {
- long int index = bindex;
- lon = index >> 14;
- index -= lon << 14;
- lon -= 180;
-
- lat = index >> 6;
- index -= lat << 6;
- lat -= 90;
-
- y = index >> 3;
- index -= y << 3;
-
- x = index;
-}
-
-
-// default destructor
-inline FGBucket::~FGBucket() {}
-
-
-// Generate the unique scenery tile index for this bucket
-//
-// The index is constructed as follows:
-//
-// 9 bits - to represent 360 degrees of longitude (-180 to 179)
-// 8 bits - to represent 180 degrees of latitude (-90 to 89)
-//
-// Each 1 degree by 1 degree tile is further broken down into an 8x8
-// grid. So we also need:
-//
-// 3 bits - to represent x (0 to 7)
-// 3 bits - to represent y (0 to 7)
-
-inline long int FGBucket::gen_index() const {
- return ((lon + 180) << 14) + ((lat + 90) << 6) + (y << 3) + x;
-}
-
-inline string FGBucket::gen_index_str() const {
- char tmp[20];
- sprintf(tmp, "%ld",
- (((long)lon + 180) << 14) + ((lat + 90) << 6) + (y << 3) + x);
- return (string)tmp;
-}
-
-
-// return the center lon of a tile
-inline double FGBucket::get_center_lon() const {
- double span = bucket_span( lat + y / 8.0 + FG_HALF_BUCKET_SPAN );
+ // Generate the unique scenery tile index for this bucket
+ //
+ // The index is constructed as follows:
+ //
+ // 9 bits - to represent 360 degrees of longitude (-180 to 179)
+ // 8 bits - to represent 180 degrees of latitude (-90 to 89)
+ //
+ // Each 1 degree by 1 degree tile is further broken down into an 8x8
+ // grid. So we also need:
+ //
+ // 3 bits - to represent x (0 to 7)
+ // 3 bits - to represent y (0 to 7)
- if ( span >= 1.0 ) {
- return lon + span / 2.0;
- } else {
- return lon + x * span + span / 2.0;
+ inline long int gen_index() const {
+ return ((lon + 180) << 14) + ((lat + 90) << 6) + (y << 3) + x;
}
-}
+ inline string gen_index_str() const {
+ char tmp[20];
+ sprintf(tmp, "%ld",
+ (((long)lon + 180) << 14) + ((lat + 90) << 6) + (y << 3) + x);
+ return (string)tmp;
+ }
-// return the center lat of a tile
-inline double FGBucket::get_center_lat() const {
- return lat + y / 8.0 + FG_HALF_BUCKET_SPAN;
-}
+ // Build the path name for this bucket
+ string gen_base_path() const;
+ // return the center lon of a tile
+ inline double get_center_lon() const {
+ double span = sg_bucket_span( lat + y / 8.0 + SG_HALF_BUCKET_SPAN );
-// return width of the tile in degrees
-inline double FGBucket::get_width() const {
- return bucket_span( get_center_lat() );
-}
+ if ( span >= 1.0 ) {
+ return lon + span / 2.0;
+ } else {
+ return lon + x * span + span / 2.0;
+ }
+ }
+ // return the center lat of a tile
+ inline double get_center_lat() const {
+ return lat + y / 8.0 + SG_HALF_BUCKET_SPAN;
+ }
-// return height of the tile in degrees
-inline double FGBucket::get_height() const {
- return FG_BUCKET_SPAN;
-}
+ // return width of the tile in degrees
+ double get_width() const;
+ // return height of the tile in degrees
+ double get_height() const;
+ // return width of the tile in meters
+ double get_width_m() const;
+ // return height of the tile in meters
+ double get_height_m() const;
+
+ // Informational methods
+ inline int get_lon() const { return lon; }
+ inline int get_lat() const { return lat; }
+ inline int get_x() const { return x; }
+ inline int get_y() const { return y; }
-// create an impossible bucket
-inline void FGBucket::make_bad( void ) {
- set_bucket(0.0, 0.0);
- lon = -1000;
-}
+ // friends
+ friend ostream& operator<< ( ostream&, const SGBucket& );
+ friend bool operator== ( const SGBucket&, const SGBucket& );
+};
// offset a bucket specified by dlon, dlat by the specified tile units
// in the X & Y direction
-FGBucket fgBucketOffset( double dlon, double dlat, int x, int y );
+SGBucket sgBucketOffset( double dlon, double dlat, int x, int y );
// calculate the offset between two buckets
-void fgBucketDiff( const FGBucket& b1, const FGBucket& b2, int *dx, int *dy );
+void sgBucketDiff( const SGBucket& b1, const SGBucket& b2, int *dx, int *dy );
inline ostream&
-operator<< ( ostream& out, const FGBucket& b )
+operator<< ( ostream& out, const SGBucket& b )
{
return out << b.lon << ":" << b.x << ", " << b.lat << ":" << b.y;
}
inline bool
-operator== ( const FGBucket& b1, const FGBucket& b2 )
+operator== ( const SGBucket& b1, const SGBucket& b2 )
{
return ( b1.lon == b2.lon &&
b1.lat == b2.lat &&
projects / simgear.git / commitdiff