93 lines
3.1 KiB
C++
93 lines
3.1 KiB
C++
/**************************************************************************
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* vector.hxx -- additional vector routines
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*
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* Written by Curtis Olson, started December 1997.
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*
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* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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* (Log is kept at end of this file)
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**************************************************************************/
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#ifndef _VECTOR_HXX
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#define _VECTOR_HXX
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#ifndef __cplusplus
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# error This library requires C++
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#endif
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#include "mat3.h"
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/* Map a vector onto the plane specified by normal */
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#if defined( USE_XTRA_MAT3_INLINES )
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# define map_vec_onto_cur_surface_plane(normal, v0, vec, result) { \
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double scale = ((normal[0]*vec[0]+normal[1]*vec[1]+normal[2]*vec[2]) / \
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(normal[0]*normal[0]+normal[1]*normal[1]+normal[2]*normal[2])); \
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result[0] = vec[0]-normal[0]*scale; \
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result[1] = vec[1]-normal[1]*scale; \
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result[2] = vec[2]-normal[2]*scale; \
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}
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#else
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void map_vec_onto_cur_surface_plane(MAT3vec normal, MAT3vec v0, MAT3vec vec,
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MAT3vec result);
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#endif //defined( USE_XTRA_MAT3_INLINES )
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// Given a point p, and a line through p0 with direction vector d,
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// find the shortest distance from the point to the line
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double fgPointLine(MAT3vec p, MAT3vec p0, MAT3vec d);
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// Given a point p, and a line through p0 with direction vector d,
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// find the shortest distance (squared) from the point to the line
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double fgPointLineSquared(MAT3vec p, MAT3vec p0, MAT3vec d);
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#endif /* _VECTOR_HXX */
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/* $Log$
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/* Revision 1.3 1998/08/24 20:04:13 curt
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/* Various "inline" code optimizations contributed by Norman Vine.
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/*
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* Revision 1.2 1998/07/24 21:34:38 curt
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* fgPointLine() rewritten into fgPointLineSquared() ... this ultimately saves
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* us from doing a sqrt().
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*
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* Revision 1.1 1998/07/08 14:40:10 curt
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* polar3d.[ch] renamed to polar3d.[ch]xx, vector.[ch] renamed to vector.[ch]xx
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* Updated fg_geodesy comments to reflect that routines expect and produce
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* meters.
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*
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* Revision 1.4 1998/04/21 17:03:51 curt
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* Prepairing for C++ integration.
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*
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* Revision 1.3 1998/01/22 02:59:39 curt
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* Changed #ifdef FILE_H to #ifdef _FILE_H
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*
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* Revision 1.2 1998/01/19 19:27:14 curt
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* Merged in make system changes from Bob Kuehne <rpk@sgi.com>
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* This should simplify things tremendously.
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*
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* Revision 1.1 1997/12/22 04:13:18 curt
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* Initial revision.
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*
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*/
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