Initial commit from Polytechnique Montreal

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diff --git a/Trivac/src/TRIAHP.f b/Trivac/src/TRIAHP.f
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+*DECK TRIAHP
+      SUBROUTINE TRIAHP (MAXKN,ISPLH,IR,NEL,LL4,SGD,SIDE,ZZ,VOL,MAT,KN,
+     1 R,RH,RT,VEC)
+*
+*-----------------------------------------------------------------------
+*
+*Purpose:
+* Assembly of a diagonal system matrix corresponding to a single cross
+* section type (primal formulation) in hexagonal geometry.
+* Note: vector VEC should be initialized by the calling program.
+*
+*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
+* ISPLH   type of mesh-splitting: =1 for complete hexagons; .gt.1 for
+*         triangle mesh-splitting.
+* IR      number of material mixtures.
+* NEL     total number of finite elements.
+* LL4     order of system matrices.
+* SGD     cross section per material mixture.
+* SIDE    dide of an hexagon.
+* ZZ      height of each hexagon.
+* VOL     volume of each element.
+* MAT     mixture index assigned to each element.
+* KN      element-ordered unknown list.
+* R       unit matrix.
+* RH      unit matrix.
+* RT      unit matrix.
+*
+*Parameters: output
+* VEC     diagonal matrix corresponding to the cross section term.
+*
+*-----------------------------------------------------------------------
+*
+*----
+*  SUBROUTINE ARGUMENTS
+*----
+      INTEGER MAXKN,ISPLH,IR,NEL,LL4,MAT(NEL),KN(MAXKN)
+      REAL SGD(IR),SIDE,ZZ(NEL),VOL(NEL),R(2,2),RH(6,6),RT(3,3),VEC(LL4)
+*----
+*  LOCAL VARIABLES
+*----
+      INTEGER ILIEN(6,3),IJ17(14),IJ27(14),IJ16(12),IJ26(12),IJ1(14),
+     1 IJ2(14)
+      REAL RH2(7,7)
+      DOUBLE PRECISION RR,VOL1,RTHG(14,14)
+      DATA ILIEN/6*4,2,1,5,6,7,3,1,5,6,7,3,2/
+      DATA IJ16,IJ26 /1,2,3,4,5,6,1,2,3,4,5,6,6*1,6*2/
+      DATA IJ17,IJ27 /1,2,3,4,5,6,7,1,2,3,4,5,6,7,7*1,7*2/
+*
+* COMPUTE THE HEXAGONAL MASS (RH2).
+      IF(ISPLH.EQ.1) THEN
+         LC=6
+         DO 10 I=1,2*LC
+         IJ1(I)=IJ16(I)
+         IJ2(I)=IJ26(I)
+   10    CONTINUE
+         DO 30 I=1,LC
+         DO 20 J=1,LC
+         RH2(I,J)=RH(I,J)
+   20    CONTINUE
+   30    CONTINUE
+      ELSE
+         LC=7
+         DO 40 I=1,2*LC
+         IJ1(I)=IJ17(I)
+         IJ2(I)=IJ27(I)
+   40    CONTINUE
+         DO 60 I=1,LC
+         DO 50 J=1,LC
+         RH2(I,J)=0.0
+   50    CONTINUE
+   60    CONTINUE
+         DO 85 K=1,6
+         DO 80 I=1,3
+         NUMI=ILIEN(K,I)
+         DO 70 J=1,3
+         NUMJ=ILIEN(K,J)
+         RH2(NUMI,NUMJ)=RH2(NUMI,NUMJ)+RT(I,J)
+   70    CONTINUE
+   80    CONTINUE
+   85    CONTINUE
+      ENDIF
+      LL=2*LC
+*
+* CALCULATION OF 3-D MASS AND STIFFNESS MATRICES FROM TENSORIAL PRODUCT
+* OF 1-D AND 2-D MATRICES.
+      DO 100 I=1,LL
+      I1=IJ1(I)
+      I2=IJ2(I)
+      DO 90 J=1,LL
+      J1=IJ1(J)
+      J2=IJ2(J)
+      RTHG(I,J)=RH2(I1,J1)*R(I2,J2)
+   90 CONTINUE
+  100 CONTINUE
+*
+      NUM1=0
+      VOL1=SIDE*SIDE
+      DO 160 K=1,NEL
+      L=MAT(K)
+      IF(L.EQ.0) GO TO 160
+      IF(VOL(K).EQ.0.0) GO TO 150
+      DO 110 I=1,LL
+      INW1=KN(NUM1+I)
+      IF(INW1.EQ.0) GO TO 110
+      RR=RTHG(I,I)*VOL1*ZZ(K)
+      VEC(INW1)=VEC(INW1)+REAL(RR*SGD(L))
+  110 CONTINUE
+  150 NUM1=NUM1+LL
+  160 CONTINUE
+      RETURN
+      END