Last change
on this file since 4450 was 731, checked in by tbretz, 24 years ago |
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1 | #include "slalib.h"
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2 | #include "slamac.h"
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3 | double slaDvdv ( double va[3], double vb[3] )
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4 | /*
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5 | ** - - - - - - - -
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6 | ** s l a D v d v
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7 | ** - - - - - - - -
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8 | **
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9 | ** Scalar product of two 3-vectors.
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10 | **
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11 | ** (double precision)
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12 | **
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13 | **
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14 | ** Given:
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15 | ** va double(3) first vector
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16 | ** vb double(3) second vector
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17 | **
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18 | **
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19 | ** The result is the scalar product va.vb (double precision)
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20 | **
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21 | **
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22 | ** Last revision: 31 October 1993
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23 | **
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24 | ** Copyright P.T.Wallace. All rights reserved.
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25 | */
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26 | {
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27 | return va[0] * vb[0] + va[1] * vb[1] + va[2] * vb[2];
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28 | }
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