GET_DIME_EXPL.f90 File Reference

Go to the source code of this file.

Functions/Subroutines
subroutine	get_dime_expl (xipo, yipo, zipo, x1, y1, z1, x2, y2, z2, x3, y3, z3, nnod, xs, ys, zs, node_expl, nnloc)
	Computes local number of nodes where explosive source is imposed.

Function/Subroutine Documentation

get_dime_expl()

subroutine get_dime_expl	(	real*8	xipo,
		real*8	yipo,
		real*8	zipo,
		real*8	x1,
		real*8	y1,
		real*8	z1,
		real*8	x2,
		real*8	y2,
		real*8	z2,
		real*8	x3,
		real*8	y3,
		real*8	z3,
		integer*4	nnod,
		real*8, dimension(nnloc)	xs,
		real*8, dimension(nnloc)	ys,
		real*8, dimension(nnloc)	zs,
		integer*4	node_expl,
		integer*4	nnloc
	)

Computes local number of nodes where explosive source is imposed.

Author

Ilario Mazzieri

Date

September, 2013

Version

1.0

Parameters

[in]	Xipo	x-coordinate of Hypocenter
[in]	Yipo	y-coordinate of Hypocenter
[in]	Zipo	z-coordinate of Hypocenter
[in]	X1	vertex coordinate (x) of the triangular fault
[in]	Y1	vertex coordinate (y) of the triangular fault
[in]	Z1	vertex coordinate (z) of the triangular fault
[in]	X2	vertex coordinate (x) of the triangular fault
[in]	Y2	vertex coordinate (y) of the triangular fault
[in]	Z2	vertex coordinate (z) of the triangular fault
[in]	X3	vertex coordinate (x) of the triangular fault
[in]	Y3	vertex coordinate (y) of the triangular fault
[in]	Z3	vertex coordinate (z) of the triangular fault
[in]	nnod	number of local nodes
[in]	xs	x-coordinate of spectral nodes
[in]	ys	y-coordinate of spectral nodes
[in]	zs	z-coordinate of spectral nodes
[in]	nnloc	(obsolete)
[out]	node_expl	local number of explosive nodes

Definition at line 42 of file GET_DIME_EXPL.f90.

         
      implicit none
      
      integer*4 :: nnod,node_expl,nnloc
      integer*4 :: isn
 
      real*8 :: xipo,yipo,zipo,x1,y1,z1,x2,y2,z2,x3,y3,z3,ux,uy,uz,vx,vy,vz,tol
      real*8 :: xmax,xmin,ymax,ymin,zmin,zmax,a,b,c, den
      real*8, dimension(nnloc) :: xs,ys,zs
 
      node_expl = 0
      tol = 5.0d0
      
      ux=(x1-x2)/sqrt((x1-x2)**2+(y1-y2)**2+(z1-z2)**2)
      uy=(y1-y2)/sqrt((x1-x2)**2+(y1-y2)**2+(z1-z2)**2)
      uz=(z1-z2)/sqrt((x1-x2)**2+(y1-y2)**2+(z1-z2)**2)
      vx=(x3-x2)/sqrt((x3-x2)**2+(y3-y2)**2+(z3-z2)**2)
      vy=(y3-y2)/sqrt((x3-x2)**2+(y3-y2)**2+(z3-z2)**2)
      vz=(z3-z2)/sqrt((x3-x2)**2+(y3-y2)**2+(z3-z2)**2)
      
      a = uy * vz - uz * vy 
      b = uz * vx - ux * vz
      c = ux * vy - uy * vx
      den = sqrt(a**2 + b**2 + c**2)
 
      !Check on the relative position of fault end points
      !In this preliminary part we check if P1 point is the lower-left fault point or not
      !If this check would fail the two points are swapped
  
      xmax=max(x1,x2,x3)+tol
      xmin=min(x1,x2,x3)-tol
      ymax=max(y1,y2,y3)+tol
      ymin=min(y1,y2,y3)-tol
      zmax=max(z1,z2,z3)+tol
      zmin=min(z1,z2,z3)-tol
  
  
      do isn = 1,nnod
         if ( dabs( a*(xs(isn)-xipo) + b*(ys(isn)-yipo) + c*(zs(isn)-zipo)/den ).le.tol) then
            if ((xs(isn).ge.xmin).and.(xs(isn).le.xmax)) then
                if ((ys(isn).ge.ymin).and.(ys(isn).le.ymax)) then
                    if ((zs(isn).ge.zmin).and.(zs(isn).le.zmax)) then
                        node_expl = node_expl+1
                    endif
                endif
            endif
         endif         
      enddo
 
      return