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/* RCSid: $Id$ */
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/*
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* Declarations for floating-point vector operations.
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*/
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/* ====================================================================
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* The Radiance Software License, Version 1.0
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*
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* Copyright (c) 1990 - 2002 The Regents of the University of California,
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* through Lawrence Berkeley National Laboratory. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment:
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* "This product includes Radiance software
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* (http://radsite.lbl.gov/)
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* developed by the Lawrence Berkeley National Laboratory
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* (http://www.lbl.gov/)."
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* Alternately, this acknowledgment may appear in the software itself,
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* if and wherever such third-party acknowledgments normally appear.
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*
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
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* and "The Regents of the University of California" must
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* not be used to endorse or promote products derived from this
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* software without prior written permission. For written
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* permission, please contact [email protected].
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*
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* 5. Products derived from this software may not be called "Radiance",
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* nor may "Radiance" appear in their name, without prior written
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* permission of Lawrence Berkeley National Laboratory.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more
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* information on Lawrence Berkeley National Laboratory, please see
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* <http://www.lbl.gov/>.
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*/
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#ifdef SMLFLT
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#define FLOAT float
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#define FTINY (1e-3)
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#else
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#define FLOAT double
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#define FTINY (1e-6)
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#endif
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#define FHUGE (1e10)
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typedef FLOAT FVECT[3];
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#define VCOPY(v1,v2) ((v1)[0]=(v2)[0],(v1)[1]=(v2)[1],(v1)[2]=(v2)[2])
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#define DOT(v1,v2) ((v1)[0]*(v2)[0]+(v1)[1]*(v2)[1]+(v1)[2]*(v2)[2])
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#define VLEN(v) sqrt(DOT(v,v))
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#define VADD(vr,v1,v2) ((vr)[0]=(v1)[0]+(v2)[0], \
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(vr)[1]=(v1)[1]+(v2)[1], \
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(vr)[2]=(v1)[2]+(v2)[2])
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#define VSUB(vr,v1,v2) ((vr)[0]=(v1)[0]-(v2)[0], \
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(vr)[1]=(v1)[1]-(v2)[1], \
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(vr)[2]=(v1)[2]-(v2)[2])
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#define VSUM(vr,v1,v2,f) ((vr)[0]=(v1)[0]+(f)*(v2)[0], \
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(vr)[1]=(v1)[1]+(f)*(v2)[1], \
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(vr)[2]=(v1)[2]+(f)*(v2)[2])
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#define VCROSS(vr,v1,v2) \
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((vr)[0]=(v1)[1]*(v2)[2]-(v1)[2]*(v2)[1], \
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(vr)[1]=(v1)[2]*(v2)[0]-(v1)[0]*(v2)[2], \
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(vr)[2]=(v1)[0]*(v2)[1]-(v1)[1]*(v2)[0])
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#ifdef NOPROTO
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extern double fdot(), dist2(), dist2lseg(), dist2line(), normalize();
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extern void fcross(), fvsum(), spinvector();
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#else
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extern double fdot(FVECT v1, FVECT v2);
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extern double dist2(FVECT v1, FVECT v2);
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extern double dist2line(FVECT p, FVECT ep1, FVECT ep2);
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extern double dist2lseg(FVECT p, FVECT ep1, FVECT ep2);
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extern void fcross(FVECT vres, FVECT v1, FVECT v2);
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extern void fvsum(FVECT vres, FVECT v0, FVECT v1, double f);
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extern double normalize(FVECT v);
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extern void spinvector(FVECT vres, FVECT vorig, FVECT vnorm, double theta);
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#endif
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