X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fmath%2Fvector.hxx;h=b4cbb2f304a27ece653afd354694aa843b32f95a;hb=578af00b0d48100c540154f54293a1b77a0655fe;hp=872643a64d9dc015f92367bd99acb4dfe4e9f4ff;hpb=e2b4c0787a4398199ef2d35e05963acd58b7a04c;p=simgear.git

diff --git a/simgear/math/vector.hxx b/simgear/math/vector.hxx
index 872643a6..b4cbb2f3 100644
--- a/simgear/math/vector.hxx
+++ b/simgear/math/vector.hxx
@@ -5,7 +5,7 @@
 
 // Written by Curtis Olson, started December 1997.
 //
-// Copyright (C) 1997  Curtis L. Olson  - curt@infoplane.com
+// Copyright (C) 1997  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
@@ -17,10 +17,9 @@
 // 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.
 //
 // $Id$
 
@@ -29,9 +28,9 @@
 #define _VECTOR_HXX
 
 
-#ifndef __cplusplus                                                          
+#ifndef __cplusplus
 # error This library requires C++
-#endif                                   
+#endif
 
 #include <simgear/compiler.h>
 
@@ -39,7 +38,17 @@
 
 
 /**
- * Map a vector onto a plane.
+ * calculate the projection, p, of u along the direction of d.
+ * @param p (out) the projection
+ * @param u (in) the vector to be projected
+ * @param d (in) the direction onto which we project
+ */
+void sgProjection(sgVec3 p, const sgVec3 u, const sgVec3 d);
+void sgProjection(sgdVec3 p, const sgdVec3 u, const sgdVec3 d);
+
+
+/**
+ * Map i.e. project a vector onto a plane.
  * @param normal (in) normal vector for the plane
  * @param v0 (in) a point on the plane
  * @param vec (in) the vector to map onto the plane