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*DECK SYB7TN
SUBROUTINE SYB7TN (IHMIN,IHMAX,IXRAYO,ISDEBU,COSECT,NRI,RAYONS,
& TYSUIT,IHSUIT,DELTAC,IRSUIT)
*
*-----------------------------------------------------------------------
*
*Purpose:
* Search of the next singular point in an hexagonal cell.
*
*Copyright:
* Copyright (C) 2002 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): A. Hebert
*
*Parameters: input
* IHMIN index of the first tube.
* IHMAX index of the last tube.
* IXRAYO tube indices from west to east.
* ISDEBU index of the first sector.
* COSECT sector angle cosinus.
* NRI number of radius.
* RAYONS radius of the tubes.
*
*Parameters: input/output
* DELTAC next distance.
*
*Parameters: output
* TYSUIT type of the next singular point.
* IHSUIT index of the next singular point.
* IRSUIT index of the preceding tube.
*
*-----------------------------------------------------------------------
*
*----
* SUBROUTINE ARGUMENTS
*----
INTEGER IHMIN,IHMAX,IXRAYO(IHMAX),ISDEBU,NRI,IHSUIT,IRSUIT
REAL COSECT(3),RAYONS(NRI),DELTAC
CHARACTER TYSUIT*4
*----
* LOCAL VARIABLES
*----
LOGICAL LGSEC1
LOGICAL LGSEC2
*
IR1 = IXRAYO(IHMIN)
IR2 = IXRAYO(IHMIN+1)
LGSEC2 = IR1 .EQ. IR2
IF (LGSEC2) THEN
ISC = ISDEBU
ELSE
ISC = ISDEBU - 1
ENDIF
*
DO IHC = IHMIN + 1, IHMAX - 1
LGSEC1 = LGSEC2
IR0 = IR1
IR1 = IR2
*
IR2 = IXRAYO(IHC+1)
LGSEC2 = IR1 .EQ. IR2
IF (LGSEC2) THEN
ISC = ISC + 1
ENDIF
*
* Tangente = Intersection Couronne
IF (IR2 .EQ. IR0) THEN
IF (IR2 .EQ. IR1+1) THEN
IF (RAYONS(IR1) .LT. DELTAC) THEN
IHSUIT = IHC
DELTAC = RAYONS(IR1)
TYSUIT = 'Tang'
ENDIF
ENDIF
*
* Coin du 1er Secteur
ELSEIF (ISC .EQ. 1) THEN
IF (LGSEC2) THEN
RR = RAYONS(IR1)
DD = RR * COSECT(ISC)
IF (DD .LT. DELTAC) THEN
IHSUIT = IHC
DELTAC = DD
TYSUIT = 'Coin'
IRSUIT = IR1 + 1
ENDIF
ENDIF
*
* Coin d'un Secteur Est
ELSEIF (LGSEC1) THEN
RR = RAYONS(IR1)
DD = RR * COSECT(ISC)
IF (DD .LT. DELTAC) THEN
IHSUIT = IHC
DELTAC = DD
TYSUIT = 'Coin'
IRSUIT = IR1 + 1
ENDIF
ENDIF
*
ENDDO
*
RETURN
END
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