dxwalc.F

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C            SPMD_AGETMSR                    /spe/mach_spmd.F
!||====================================================================
!||    dxwalc         ../engine/source/output/anim/generate/dxwalc.F
!||--- called by ------------------------------------------------------
!||    dxyzsect       ../engine/source/output/anim/generate/dxyzsect.F
!||--- calls      -----------------------------------------------------
!||    spmd_agetmsr   ../engine/source/mpi/anim/spmd_agetmsr.F
!||    write_r_c      ../common_source/tools/input_output/write_routtines.c
!||====================================================================
      SUBROUTINE dxwalc(X ,RWL ,MSR ,
     3            XMIN ,YMIN ,ZMIN  ,XMAX ,YMAX  ,
     4            ZMAX,FR_WALL)
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C----------------------------------------------- 
#include      "implicit_f.inc"
#include      "task_c.inc"
#include      "com01_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER MSR,FR_WALL(NSPMD+2)
C     REAL
      my_real
     .   x(3,*), rwl(*),xmin ,ymin ,zmin  ,xmax ,ymax  , zmax
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER I
C     REAL
      my_real
     .   xwl, ywl, zwl,xn,yn,zn,d,dx,dy,dz,xl, r, v1, v2, v3, vv1,
     .   vv2, vv3, vv, x0, y0, z0, alpha, s, c
      REAL R4
C-----------------------------------------------
C
       xn =rwl(1)
       yn =rwl(2)
       zn =rwl(3)
      IF (nspmd == 1) THEN
        IF(msr==0)THEN
         xwl=rwl(4)
         ywl=rwl(5)
         zwl=rwl(6)
        ELSE
         xwl=x(1,msr)
         ywl=x(2,msr)
         zwl=x(3,msr)
        ENDIF
      ELSE
         CALL spmd_agetmsr(fr_wall,x,msr,xwl,ywl,zwl,rwl)
      END IF
C
      IF (ispmd==0) THEN
C
      dx = xmax - xmin
      dy = ymax - ymin
      dz = zmax - zmin
C
      r =  half*rwl(7)
      xl = half*max(dx,dy,dz)
      v1 = zero
      v2 = zep707
      v3 = zep707
      vv1 = v2 * zn - v3 * yn
      vv2 = v3 * xn - v1 * zn
      vv3 = v1 * yn - v2 * xn
      vv = sqrt(vv1*vv1 + vv2*vv2 + vv3*vv3)
      IF(vv<=half)THEN
        v1 = zero
        v2 = -zep707
        v3 = zep707
        vv1 = v2 * zn - v3 * yn
        vv2 = v3 * xn - v1 * zn
        vv3 = v1 * yn - v2 * xn
        vv = sqrt(vv1*vv1 + vv2*vv2 + vv3*vv3)
      ENDIF
      vv1 = r*vv1/vv
      vv2 = r*vv2/vv
      vv3 = r*vv3/vv
      v1 = vv2 * zn - vv3 * yn
      v2 = vv3 * xn - vv1 * zn
      v3 = vv1 * yn - vv2 * xn
C
      x0 = xwl
      y0 = ywl
      z0 = zwl
      alpha = zero
      DO i=1,24
        s = sin(alpha)
        c = cos(alpha)
        r4 = x0 + vv1 * s + v1 * c - xn * xl
        CALL write_r_c(r4,1)
        r4 = y0 + vv2 * s + v2 * c - yn * xl
        CALL write_r_c(r4,1)
        r4 = z0 + vv3 * s + v3 * c - zn * xl
        CALL write_r_c(r4,1)
        r4 = x0 + vv1 * s + v1 * c + xn * xl
        CALL write_r_c(r4,1)
        r4 = y0 + vv2 * s + v2 * c + yn * xl
        CALL write_r_c(r4,1)
        r4 = z0 + vv3 * s + v3 * c + zn * xl
        CALL write_r_c(r4,1)
        alpha = alpha + pi/12
      ENDDO
      ENDIF
C
      RETURN
      END