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/* RCSid $Id: fvect.h,v 2.11 2003/06/27 06:53:21 greg Exp $ */ |
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/* |
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* Declarations for floating-point vector operations. |
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*/ |
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#ifndef _RAD_FVECT_H_ |
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#define _RAD_FVECT_H_ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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|
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#ifdef SMLFLT |
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#define RREAL float |
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#define FTINY (1e-3) |
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#else |
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#define RREAL 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 RREAL 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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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 int closestapproach(RREAL t[2], FVECT rorg0, FVECT rdir0, |
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FVECT rorg1, FVECT rdir1); |
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extern void spinvector(FVECT vres, FVECT vorig, FVECT vnorm, double theta); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _RAD_FVECT_H_ */ |
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