Fix a build order problem.

[simgear.git] / simgear / math / vector.hxx

diff --git a/simgear/math/vector.hxx b/simgear/math/vector.hxx
index f27f8b60a773bc60ff20cea7c534446cf12c000f..84029aa35a97e38c111adf6159a43d3b239add4c 100644 (file)
--- a/simgear/math/vector.hxx
+++ b/simgear/math/vector.hxx
@@ -4,19 +4,20 @@
 //
 // Copyright (C) 1997  Curtis L. Olson  - curt@infoplane.com
 //
-// 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.
 //
 // $Id$
 
@@ -83,16 +84,38 @@ inline void sgmap_vec_onto_cur_surface_plane( sgVec3 normal,
 }
 
 
+inline void sgCopyNegateVec4( sgVec4 dst, sgVec4 src )
+{
+       dst [ 0 ] = -src [ 0 ] ;
+       dst [ 1 ] = -src [ 1 ] ;
+       dst [ 2 ] = -src [ 2 ] ;
+       dst [ 3 ] = -src [ 3 ] ;
+}
+
+// Given a point p, and a line through p0 with direction vector d,
+// find the closest point (p1) on the line
+void sgClosestPointToLine( sgVec3 p1, const sgVec3 p, const sgVec3 p0,
+                          const sgVec3 d );
+
+// Given a point p, and a line through p0 with direction vector d,
+// find the closest point (p1) on the line
+void sgdClosestPointToLine( sgdVec3 p1, const sgdVec3 p, const sgdVec3 p0,
+                           const sgdVec3 d );
+
 // Given a point p, and a line through p0 with direction vector d,
 // find the shortest distance (squared) from the point to the line
-double sgPointLineDistSquared( const sgVec3 p, const sgVec3 p0,
-                              const sgVec3 d );
+double sgClosestPointToLineDistSquared( const sgVec3 p, const sgVec3 p0,
+                                       const sgVec3 d );
 
 // Given a point p, and a line through p0 with direction vector d,
 // find the shortest distance (squared) from the point to the line
-double sgdPointLineDistSquared( const sgdVec3 p, const sgdVec3 p0,
-                               const sgdVec3 d );
+double sgdClosestPointToLineDistSquared( const sgdVec3 p, const sgdVec3 p0,
+                                        const sgdVec3 d );
 
+// This is same as
+// sgMakeMatTrans4( sgMat4 sgTrans, sgVec3 trans )
+// sgPostMultMat4( sgMat, sgTRANS );
+void sgPostMultMat4ByTransMat4( sgMat4 src, const sgVec3 trans );
 
 #endif // _VECTOR_HXX