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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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#include "copyright.h"
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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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