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*DECK NXTQEW
SUBROUTINE NXTQEW(NDIM ,NANGL ,NQUAD ,NBANGL,DQUAD,
> DANGLT,DDENWT)
*
*-----------------------------------------------------------------------
*
*Purpose:
* To define quadrature angles for a given tracking option.
*
*Copyright:
* Copyright (C) 2005 Ecole Polytechnique de Montreal
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
*Author(s):
* G. Marleau, R. Roy, M. Hampartzounian
*
*Parameters: input
* NDIM number of dimensions for geometry.
* NANGL quadrature order.
* NQUAD number of quadrant (in 3-D) and quarter (in 2-D).
* NBANGL number of angles.
* DQUAD relative density of each quadrant.
*
*Parameters: output
* DANGLT director cosines of angles.
* DDENWT angular density for each angle.
*
*Reference:
* G. Marleau,
* New Geometries Processing in DRAGON: The NXT: Module,
* Report IGE-260, Polytechnique Montreal,
* Montreal, 2005.
* \\\\
* Extracted from the subroutine XELTS2 of EXCELL.
*
*----------
*
IMPLICIT NONE
*----
* Subroutine arguments
*----
INTEGER NDIM,NANGL,NQUAD,NBANGL
DOUBLE PRECISION DQUAD(NQUAD)
DOUBLE PRECISION DANGLT(NDIM,NQUAD,NBANGL),DDENWT(NQUAD,NBANGL)
*----
* Local parameters
*----
INTEGER IOUT
CHARACTER NAMSBR*6
PARAMETER (IOUT=6,NAMSBR='NXTQEW')
DOUBLE PRECISION DZERO,DONE,DTWO
PARAMETER (DZERO=0.0D0,DONE=1.0D0,DTWO=2.0D0)
*----
* Local variables
*----
INTEGER IANG,NO2,IPOS,ICUR,IEND
DOUBLE PRECISION DDA,X,Y,Z
*----
* Data
*----
INTEGER INSN( 9),JNMU( 9),MUT(120), ETT(120),XHT(120)
REAL SNT (63)
SAVE INSN,JNMU,MUT,ETT,XHT,SNT
DATA INSN/ 0, 1, 3, 7, 13, 21, 32, 46, 63/
DATA JNMU/ 0, 1, 4, 10, 20, 35, 56, 84,120/
DATA MUT / 1,
> 1, 1, 2,
> 1, 3, 1, 4, 4, 2,
> 1, 3, 3, 1, 4, 6, 4, 5, 5, 2,
> 1, 3, 3, 3, 1, 5, 7, 7, 5, 4,
> 8, 4, 6, 6, 2,
> 1, 3, 3, 3, 3, 1, 4, 8, 10, 8,
> 4, 6, 11, 11, 6, 7, 9, 7, 5, 5,
> 2,
> 1, 3, 3, 3, 3, 3, 1, 4, 9, 11,
> 11, 9, 4, 6, 12, 14, 12, 6, 8, 13,
> 13, 8, 7, 10, 7, 5, 5, 2,
> 1, 3, 3, 3, 3, 3, 3, 1, 4, 10,
> 12, 12, 12, 10, 4, 6, 13, 16, 16, 13,
> 6, 8, 15, 17, 15, 8, 9, 14, 14, 9,
> 7, 11, 7, 5, 5, 2/
DATA ETT / 1,
> 1, 2, 1,
> 1, 4, 2, 3, 4, 1,
> 1, 4, 5, 2, 3, 6, 5, 3, 4, 1,
> 1, 5, 4, 6, 2, 3, 7, 8, 6, 3,
> 7, 4, 3, 5, 1,
> 1, 4, 6, 7, 5, 2, 3, 8, 11, 9,
> 5, 3, 10, 11, 7, 3, 8, 6, 3, 4,
> 1,
> 1, 4, 6, 8, 7, 5, 2, 3, 9, 12,
> 13, 10, 5, 3, 11, 14, 13, 7, 3, 11,
> 12, 8, 3, 9, 6, 3, 4, 1,
> 1, 4, 6, 8, 9, 7, 5, 2, 3, 10,
> 13, 15, 14, 11, 5, 3, 12, 16, 17, 14,
> 7, 3, 12, 16, 15, 9, 3, 12, 13, 8,
> 3, 10, 6, 3, 4, 1/
DATA XHT / 1,
> 2, 1, 1,
> 2, 4, 1, 4, 3, 1,
> 2, 5, 4, 1, 5, 6, 3, 4, 3, 1,
> 2, 6, 4, 5, 1, 6, 8, 7, 3, 4,
> 7, 3, 5, 3, 1,
> 2, 5, 7, 6, 4, 1, 5, 9, 11, 8,
> 3, 7, 11, 10, 3, 6, 8, 3, 4, 3,
> 1,
> 2, 5, 7, 8, 6, 4, 1, 5, 10, 13,
> 12, 9, 3, 7, 13, 14, 11, 3, 8, 12,
> 11, 3, 6, 9, 3, 4, 3, 1,
> 2, 5, 7, 9, 8, 6, 4, 1, 5, 11,
> 14, 15, 13, 10, 3, 7, 14, 17, 16, 12,
> 3, 9, 15, 16, 12, 3, 8, 13, 12, 3,
> 6, 10, 3, 4, 3, 1/
DATA SNT / .577350269,
> .350021174, .868890300,
> .2561429, .9320846, .2663443, .6815646,
> .1971380, .9603506, .2133981, .5512958, .8065570, .5773503,
> .1631408, .9730212, .1755273, .6961286, .4567576, .8721024,
> .4897749, .7212773, .1370611, .9810344, .1497456, .3911744,
> .9080522, .6040252, .7827706, .4213515, .8030727, .4249785,
> .6400755,
> .1196230, .9855865, .1301510, .3399238, .9314035, .5326134,
> .8362916, .7010923, .3700559, .8521252, .3736108, .5691823,
> .7324250, .577350269,
> .1050159, .9889102, .1152880, .3016701, .9464163, .4743525,
> .8727534, .6327389, .7657351, .3284315, .8855877, .3332906,
> .5107319, .7925089, .6666774, .5215431, .6752671/
*----
* Start processing
*----
DDA=DBLE(8*NBANGL)
NO2 = NANGL/2
IPOS = INSN( NO2 )
ICUR = JNMU( NO2 )
IEND = JNMU( NO2 + 1)
DO IANG=1,NBANGL
ICUR=ICUR+1
X = DBLE(SNT( MUT(ICUR) + IPOS ))
Y = DBLE(SNT( ETT(ICUR) + IPOS ))
Z = DBLE(SNT( XHT(ICUR) + IPOS ))
DANGLT(1,1,IANG)=X
DANGLT(2,1,IANG)=Y
DANGLT(3,1,IANG)=Z
DDENWT(1,IANG)=DQUAD(1)*DDA
DANGLT(1,2,IANG)=-X
DANGLT(2,2,IANG)=Y
DANGLT(3,2,IANG)=Z
DDENWT(2,IANG)=DQUAD(2)*DDA
DANGLT(1,3,IANG)=X
DANGLT(2,3,IANG)=-Y
DANGLT(3,3,IANG)=Z
DDENWT(3,IANG)=DQUAD(3)*DDA
DANGLT(1,4,IANG)=-X
DANGLT(2,4,IANG)=-Y
DANGLT(3,4,IANG)=Z
DDENWT(4,IANG)=DQUAD(4)*DDA
ENDDO
*----
* Processing finished: return
*----
RETURN
*----
* Output formats
*----
END
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