//
// Written by Curtis Olson, started March 1999.
//
-// Copyright (C) 1999 Curtis L. Olson - curt@flightgear.org
+// Copyright (C) 1999 Curtis L. Olson - http://www.flightgear.org/~curt
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
-// 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.
+// 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
*/
+#ifdef HAVE_CONFIG_H
+# include <simgear_config.h>
+#endif
+
+#include <simgear/compiler.h>
+
+// #include <iostream>
+
#include "texcoord.hxx"
+// using std::cout;
+// using std::endl;
+
#define FG_STANDARD_TEXTURE_DIMENSION 1000.0 // meters
#define MAX_TEX_COORD 8.0
// return the basic unshifted/unmoded texture coordinate for a lat/lon
-inline Point3D basic_tex_coord( const Point3D& p,
- double degree_width, double degree_height,
- double scale )
+static inline SGVec2f basic_tex_coord( const SGGeod& p,
+ double degree_width,
+ double degree_height,
+ double scale )
{
- return Point3D( p.x() * ( degree_width * scale /
- FG_STANDARD_TEXTURE_DIMENSION ),
- p.y() * ( degree_width * scale /
+ return SGVec2f( p.getLongitudeDeg() * ( degree_width * scale /
FG_STANDARD_TEXTURE_DIMENSION ),
- 0.0 );
+ p.getLatitudeDeg() * ( degree_height * scale /
+ FG_STANDARD_TEXTURE_DIMENSION )
+ );
}
// traverse the specified fan/strip/list of vertices and attempt to
// calculate "none stretching" texture coordinates
-point_list calc_tex_coords( const FGBucket& b, const point_list& geod_nodes,
+std::vector<SGVec2f> sgCalcTexCoords( const SGBucket& b, const std::vector<SGGeod>& geod_nodes,
+ const int_list& fan, double scale )
+{
+ return sgCalcTexCoords(b.get_center_lat(), geod_nodes, fan, scale);
+}
+
+std::vector<SGVec2f> sgCalcTexCoords( double centerLat, const std::vector<SGGeod>& geod_nodes,
const int_list& fan, double scale )
{
// cout << "calculating texture coordinates for a specific fan of size = "
// calculate perimeter based on center of this degree (not center
// of bucket)
- double clat = (int)b.get_center_lat();
+ double clat = (int)centerLat;
if ( clat > 0 ) {
clat = (int)clat + 0.5;
} else {
clat = (int)clat - 0.5;
}
- double clat_rad = clat * DEG_TO_RAD;
+ double clat_rad = clat * SGD_DEGREES_TO_RADIANS;
double cos_lat = cos( clat_rad );
- double local_radius = cos_lat * EQUATORIAL_RADIUS_M;
- double local_perimeter = 2.0 * local_radius * FG_PI;
+ double local_radius = cos_lat * SG_EQUATORIAL_RADIUS_M;
+ double local_perimeter = local_radius * SGD_2PI;
double degree_width = local_perimeter / 360.0;
// cout << "clat = " << clat << endl;
// cout << "local_perimeter = " << local_perimeter << endl;
// cout << "degree_width = " << degree_width << endl;
- double perimeter = 2.0 * EQUATORIAL_RADIUS_M * FG_PI;
+ double perimeter = SG_EQUATORIAL_RADIUS_M * SGD_2PI;
double degree_height = perimeter / 360.0;
// cout << "degree_height = " << degree_height << endl;
// find min/max of fan
- Point3D tmin, tmax, p, t;
+ SGVec2f tmin, tmax;
bool first = true;
int i;
for ( i = 0; i < (int)fan.size(); ++i ) {
- p = geod_nodes[ fan[i] ];
+ SGGeod p = geod_nodes[ fan[i] ];
// cout << "point p = " << p << endl;
- t = basic_tex_coord( p, degree_width, degree_height, scale );
+ SGVec2f t = basic_tex_coord( p, degree_width, degree_height, scale );
// cout << "basic_tex_coord = " << t << endl;
if ( first ) {
first = false;
} else {
if ( t.x() < tmin.x() ) {
- tmin.setx( t.x() );
+ tmin.x() = t.x();
}
if ( t.y() < tmin.y() ) {
- tmin.sety( t.y() );
+ tmin.y() = t.y();
}
if ( t.x() > tmax.x() ) {
- tmax.setx( t.x() );
+ tmax.x() = t.x();
}
if ( t.y() > tmax.y() ) {
- tmax.sety( t.y() );
+ tmax.y() = t.y();
}
}
}
// but is the best we can do.
// cout << "SHIFTING" << endl;
if ( tmin.x() < 0 ) {
- tmin.setx( (double)( (int)tmin.x() - 1 ) );
+ tmin.x() = (double)( (int)tmin.x() - 1 ) ;
} else {
- tmin.setx( (int)tmin.x() );
+ tmin.x() = (int)tmin.x();
}
+
if ( tmin.y() < 0 ) {
- tmin.sety( (double)( (int)tmin.y() - 1 ) );
+ tmin.y() = (double)( (int)tmin.y() - 1 );
} else {
- tmin.sety( (int)tmin.y() );
+ tmin.y() = (int)tmin.y();
}
// cout << "found tmin = " << tmin << endl;
} else {
if ( tmin.x() < 0 ) {
- tmin.setx( ( (int)(tmin.x() / HALF_MAX_TEX_COORD) - 1 )
- * HALF_MAX_TEX_COORD );
+ tmin.x() = ( (int)(tmin.x() / HALF_MAX_TEX_COORD) - 1 )
+ * HALF_MAX_TEX_COORD ;
} else {
- tmin.setx( ( (int)(tmin.x() / HALF_MAX_TEX_COORD) )
- * HALF_MAX_TEX_COORD );
+ tmin.x() = ( (int)(tmin.x() / HALF_MAX_TEX_COORD) )
+ * HALF_MAX_TEX_COORD ;
}
if ( tmin.y() < 0 ) {
- tmin.sety( ( (int)(tmin.y() / HALF_MAX_TEX_COORD) - 1 )
- * HALF_MAX_TEX_COORD );
+ tmin.y() = ( (int)(tmin.y() / HALF_MAX_TEX_COORD) - 1 )
+ * HALF_MAX_TEX_COORD ;
} else {
- tmin.sety( ( (int)(tmin.y() / HALF_MAX_TEX_COORD) )
- * HALF_MAX_TEX_COORD );
+ tmin.y() = ( (int)(tmin.y() / HALF_MAX_TEX_COORD) )
+ * HALF_MAX_TEX_COORD ;
}
#if 0
// structure is small enough ... we can mod it so we can
}
// generate tex_list
- Point3D adjusted_t;
- point_list tex;
+ SGVec2f adjusted_t;
+ std::vector<SGVec2f> tex;
tex.clear();
for ( i = 0; i < (int)fan.size(); ++i ) {
- p = geod_nodes[ fan[i] ];
- t = basic_tex_coord( p, degree_width, degree_height, scale );
+ SGGeod p = geod_nodes[ fan[i] ];
+ SGVec2f t = basic_tex_coord( p, degree_width, degree_height, scale );
// cout << "second t = " << t << endl;
adjusted_t = t - tmin;
// cout << "adjusted_t " << adjusted_t << endl;
}
#endif
- if ( adjusted_t.x() < FG_EPSILON ) {
- adjusted_t.setx( 0.0 );
+ if ( adjusted_t.x() < SG_EPSILON ) {
+ adjusted_t.x() = 0.0;
}
- if ( adjusted_t.y() < FG_EPSILON ) {
- adjusted_t.sety( 0.0 );
+ if ( adjusted_t.y() < SG_EPSILON ) {
+ adjusted_t.y() = 0.0;
}
- adjusted_t.setz( 0.0 );
+
// cout << "adjusted_t = " << adjusted_t << endl;
tex.push_back( adjusted_t );