X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fmisc%2Ftexcoord.cxx;h=30af6eff8e7b34b35cd53101f48ca554ad818b09;hb=b48c0e968fcba4c063419e12674a7f2b24954b43;hp=f428cc926feea14e0c5f4d8d4c0b704538905d1b;hpb=470d01a50881e36f49f15549263623f965e2c452;p=simgear.git

diff --git a/simgear/misc/texcoord.cxx b/simgear/misc/texcoord.cxx
index f428cc92..30af6eff 100644
--- a/simgear/misc/texcoord.cxx
+++ b/simgear/misc/texcoord.cxx
@@ -2,7 +2,7 @@
 //
 // 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
@@ -14,10 +14,9 @@
 // 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.
 //
 // $Id$
 
@@ -140,8 +139,20 @@ enter this in the official comments in case I forget again. :-)
 
 */
 
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
+#include <simgear/compiler.h>
+
+// #include <iostream>
+
 #include "texcoord.hxx"
 
+#include <simgear/math/point3d.hxx>
+// using std::cout;
+// using std::endl;
+
 
 #define FG_STANDARD_TEXTURE_DIMENSION 1000.0 // meters
 #define MAX_TEX_COORD 8.0
@@ -149,9 +160,10 @@ enter this in the official comments in case I forget again. :-)
 
 
 // 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 Point3D basic_tex_coord( const Point3D& p, 
+                                       double degree_width,
+                                       double degree_height,
+                                       double scale )
 {
     return Point3D( p.x() * ( degree_width * scale / 
 			      FG_STANDARD_TEXTURE_DIMENSION ),
@@ -163,7 +175,13 @@ inline Point3D basic_tex_coord( const Point3D& p,
 
 // traverse the specified fan/strip/list of vertices and attempt to
 // calculate "none stretching" texture coordinates
-point_list calc_tex_coords( const SGBucket& b, const point_list& geod_nodes,
+point_list sgCalcTexCoords( const SGBucket& b, const point_list& geod_nodes,
+			    const int_list& fan, double scale )
+{
+    return sgCalcTexCoords(b.get_center_lat(), geod_nodes, fan, scale);
+}
+
+point_list sgCalcTexCoords( double centerLat, const point_list& geod_nodes,
 			    const int_list& fan, double scale )
 {
     // cout << "calculating texture coordinates for a specific fan of size = "
@@ -171,17 +189,17 @@ point_list calc_tex_coords( const SGBucket& b, const point_list& geod_nodes,
 
     // 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 * SG_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;
@@ -191,7 +209,7 @@ point_list calc_tex_coords( const SGBucket& b, const point_list& geod_nodes,
     // cout << "local_perimeter = " << local_perimeter << endl;
     // cout << "degree_width = " << degree_width << endl;
 
-    double perimeter = 2.0 * EQUATORIAL_RADIUS_M * SG_PI;
+    double perimeter = SG_EQUATORIAL_RADIUS_M * SGD_2PI;
     double degree_height = perimeter / 360.0;
     // cout << "degree_height = " << degree_height << endl;