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NORTRIP_grid_roads.f90
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NORTRIP_grid_roads.f90
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!NORTRIP_grid_roads.f90
!==========================================================================
! NORTRIP model save_gridded_lines
!==========================================================================
subroutine save_gridded_lines
!Test routine
use NORTRIP_definitions
implicit none
real :: x_grid(10,2),y_grid(10,2),x_line(50,2),y_line(50,2)
real :: line(50,4),length_line(50)
integer n_grid,n_line
integer l,g
real :: f(50)
!functions
real line_fraction_in_grid_func
write(*,*) 'input data'
g=1
do l=1,n_line
length_line(l)=sqrt((x_line(l,1)-x_line(l,2))**2+(y_line(l,1)-y_line(l,2))**2)
!write(*,*) g,l,x_grid(g,:),y_grid(g,:),x_line(l,:),y_line(l,:),length_line(l)
enddo
write(*,*) 'starting gridding'
do g=1,n_grid
do l=1,n_line
f(l)=line_fraction_in_grid_func(x_grid(g,:),y_grid(g,:),x_line(l,:),y_line(l,:))
write(*,*) g,l,f(l)
enddo
enddo
stop
end subroutine save_gridded_lines
!==========================================================================
! NORTRIP model line_fraction_in_grid_func
!==========================================================================
function line_fraction_in_grid_func(x_grid_in,y_grid_in,x_line_in,y_line_in)
implicit none
real, intent(in) :: x_grid_in(2),y_grid_in(2),x_line_in(2),y_line_in(2)
real :: line_fraction_in_grid_func
real :: x_grid(2),y_grid(2),x_line(2),y_line(2)
real :: x_int(2),y_int(2)
real :: length_line,length_int
real :: dx,dy
real :: x_temp,y_temp
integer node,anti_node
integer node_x_grid,node_y_grid
integer :: n_intersection
!Set to local variables
x_grid=x_grid_in
y_grid=y_grid_in
x_line=x_line_in
y_line=y_line_in
!Set length of road link
length_line=sqrt((x_line(1)-x_line(2))**2+(y_line(1)-y_line(2))**2)
!Set the initial fraction
line_fraction_in_grid_func=0.
!Set the initial intercepts
x_int(1:2)=x_line
y_int(1:2)=y_line
!write(*,*) x_grid(:),y_grid(:),x_line(:),y_line(:),length_line
if (length_line.eq.0) return
dx=MAXVAL(x_grid)-MINVAL(x_grid)
dy=MAXVAL(y_grid)-MINVAL(y_grid)
!Check first for lines that cannot have an intersection. Will return 0
if (x_line(1).lt.x_grid(1).and.x_line(2).lt.x_grid(1)) return
if (x_line(1).ge.x_grid(2).and.x_line(2).ge.x_grid(2)) return
if (y_line(1).lt.y_grid(1).and.y_line(2).lt.y_grid(1)) return
if (y_line(1).ge.y_grid(2).and.y_line(2).ge.y_grid(2)) return
!Check for lines that are completely inside the grid
if (x_line(1).ge.x_grid(1).and.x_line(2).ge.x_grid(1) &
.and.x_line(1).lt.x_grid(2).and.x_line(2).lt.x_grid(2) &
.and.y_line(1).ge.y_grid(1).and.y_line(2).ge.y_grid(1) &
.and.y_line(1).lt.y_grid(2).and.y_line(2).lt.y_grid(2)) then
line_fraction_in_grid_func=1.
x_int=x_line
y_int=y_line
return
endif
!Check for lines with the one of the nodes within
do node=1,2
if (node.eq.1) anti_node=2
if (node.eq.2) anti_node=1
if (x_line(node).ge.x_grid(1).and.x_line(node).lt.x_grid(2) &
.and.y_line(node).ge.y_grid(1).and.y_line(node).lt.y_grid(2)) then
!This node is in the grid
!write(*,*) 'One node in grid'
!Shift parallel and equal lines when they are on the grid edge
if (x_line(node).eq.x_line(anti_node).and.x_line(node).eq.x_grid(1)) then
x_line=x_line+dx*1e-6
endif
if (y_line(node).eq.y_line(anti_node).and.y_line(node).eq.y_grid(1)) then
y_line=y_line+dy*1e-6
endif
!Can't intersect since it is parallel to the horizontal grid lines
if (y_line(node).ne.y_line(anti_node)) then
!Check intersection with the horizontal grid faces
do node_y_grid=1,2
x_temp=x_line(node)+(y_grid(node_y_grid)-y_line(node))*(x_line(anti_node)-x_line(node))/(y_line(anti_node)-y_line(node))
y_temp=y_grid(node_y_grid)
!write(*,*) node,x_line(node),y_line(node),x_temp,y_temp,MINVAL(y_line),MAXVAL(y_line)
if (y_temp.ge.MINVAL(y_line).and.y_temp.le.MAXVAL(y_line).and.y_temp.ne.y_line(node).and.x_temp.ge.MINVAL(x_grid).and.x_temp.le.MAXVAL(x_grid)) then
y_int(anti_node)=y_grid(node_y_grid)
x_int(anti_node)=x_temp
x_int(node)=x_line(node)
y_int(node)=y_line(node)
length_int=sqrt((x_int(node)-x_int(anti_node))**2+(y_int(node)-y_int(anti_node))**2)
line_fraction_in_grid_func=length_int/length_line
return
endif
enddo
endif
!Can't intersect since it is parallel with the vertical grid lines
if (x_line(node).ne.x_line(anti_node)) then
!Check intersection with the vertical grid faces
do node_x_grid=1,2
y_temp=y_line(node)+(x_grid(node_x_grid)-x_line(node))*(y_line(anti_node)-y_line(node))/(x_line(anti_node)-x_line(node))
x_temp=x_grid(node_x_grid)
!write(*,*) node,x_line(node),y_line(node),x_temp,y_temp,MINVAL(x_line),MAXVAL(x_line)
if (x_temp.ge.MINVAL(x_line).and.x_temp.le.MAXVAL(x_line).and.x_temp.ne.x_line(node).and.y_temp.ge.MINVAL(y_grid).and.y_temp.le.MAXVAL(y_grid)) then
x_int(anti_node)=x_grid(node_x_grid)
y_int(anti_node)=y_temp
y_int(node)=y_line(node)
x_int(node)=x_line(node)
length_int=sqrt((x_int(node)-x_int(anti_node))**2+(y_int(node)-y_int(anti_node))**2)
line_fraction_in_grid_func=length_int/length_line
return
endif
enddo
endif
endif
enddo !node
!Only posibility left is that both nodes are outside the grid
!Find 2 intersections then
n_intersection=0
node=1
anti_node=2
if (y_line(node).ne.y_line(anti_node)) then !Can't intersect since it is parallel
do node_y_grid=1,2
!Check intersection with the horizontal grid faces
x_temp=x_line(node)+(y_grid(node_y_grid)-y_line(node))*(x_line(anti_node)-x_line(node))/(y_line(anti_node)-y_line(node))
y_temp=y_grid(node_y_grid)
if (y_temp.ge.MINVAL(y_line).and.y_temp.le.MAXVAL(y_line).and.x_temp.ge.MINVAL(x_grid).and.x_temp.le.MAXVAL(x_grid).and.n_intersection.lt.2) then
n_intersection=n_intersection+1
y_int(n_intersection)=y_temp
x_int(n_intersection)=x_temp
endif
enddo
endif
if (x_line(node).ne.x_line(anti_node)) then !Can't intersect since it is parallel
do node_x_grid=1,2
y_temp=y_line(node)+(x_grid(node_x_grid)-x_line(node))*(y_line(anti_node)-y_line(node))/(x_line(anti_node)-x_line(node))
x_temp=x_grid(node_x_grid)
!Use y_temp.lt.MAXVAL(y_grid) incase it is in one of the corners
if (x_temp.ge.MINVAL(x_line).and.x_temp.le.MAXVAL(x_line).and.y_temp.ge.MINVAL(y_grid).and.y_temp.lt.MAXVAL(y_grid).and.n_intersection.lt.2) then
n_intersection=n_intersection+1
x_int(n_intersection)=x_temp
y_int(n_intersection)=y_temp
endif
enddo
endif
if (n_intersection.eq.2) then
length_int=sqrt((x_int(node)-x_int(anti_node))**2+(y_int(node)-y_int(anti_node))**2)
line_fraction_in_grid_func=length_int/length_line
endif
end function line_fraction_in_grid_func
!==========================================================================
! NORTRIP model save_gridded_lines_test_routine
!==========================================================================
subroutine save_gridded_lines_test_routine
!Test routine
use NORTRIP_definitions
implicit none
real :: x_grid(10,2),y_grid(10,2),x_line(50,2),y_line(50,2)
real :: line(50,4),length_line(50)
integer n_grid,n_line
integer l,g
real :: f(50)
!functions
real line_fraction_in_grid_func
n_grid=2
x_grid(1,:)=(/-1.,1./)
y_grid(1,:)=(/-1.,1./)
x_grid(2,:)=(/1.,3./)
y_grid(2,:)=(/1.,3./)
line(1,:)=(/.5,.5,1.,2./)!x1,y1,x2,y2
line(2,:)=(/.5,0.,-2.,-0./)!x1,y1,x2,y2
line(3,:)=(/0.,-0.2,-0.,-2./)!x1,y1,x2,y2
line(4,:)=(/2.,3.,0.5,2./)!x1,y1,x2,y2
line(5,:)=(/-2.,-3.,1.5,1.5/)!x1,y1,x2,y2
line(6,:)=(/.7,-.9,.2,.7/)!x1,y1,x2,y2
line(7,:)=(/-1.,-3.,-1.,+1./)!x1,y1,x2,y2
line(8,:)=(/-.5,-1.,3.,-1./)!x1,y1,x2,y2
line(9,:)=(/-.5,1.,3.,1./)!x1,y1,x2,y2
line(10,:)=(/1.,-3.,1.,+0./)!x1,y1,x2,y2
line(11,:)=(/-.7,-3.,-.7,+2./)!x1,y1,x2,y2
line(12,:)=(/.5,1.5,1.5,.6/)!x1,y1,x2,y2
line(13,:)=(/-1.,1.,1.,-1./)!x1,y1,x2,y2
line(14,:)=(/-1.,-1.,1.,1./)!x1,y1,x2,y2
line(15,:)=(/-1.,1.,1.,1./)!x1,y1,x2,y2
line(16,:)=(/-1.5,.3,1.5,.3/)!x1,y1,x2,y2
line(17,:)=(/-3.,2.,1.5,-3./)!x1,y1,x2,y2
line(18,:)=(/-3.,-2.,1.,1./)!x1,y1,x2,y2
line(19,:)=(/+3.,-2.,-1.,1./)!x1,y1,x2,y2
line(20,:)=(/-3.,0.,1.,-1./)!x1,y1,x2,y2
n_line=20
write(*,*) 'input data'
g=1
do l=1,n_line
x_line(l,1)=line(l,1)
x_line(l,2)=line(l,3)
y_line(l,1)=line(l,2)
y_line(l,2)=line(l,4)
length_line(l)=sqrt((x_line(l,1)-x_line(l,2))**2+(y_line(l,1)-y_line(l,2))**2)
!write(*,*) g,l,x_grid(g,:),y_grid(g,:),x_line(l,:),y_line(l,:),length_line(l)
enddo
write(*,*) 'starting gridding'
do g=1,n_grid
do l=1,n_line
f(l)=line_fraction_in_grid_func(x_grid(g,:),y_grid(g,:),x_line(l,:),y_line(l,:))
write(*,*) g,l,f(l)
enddo
enddo
stop
end subroutine save_gridded_lines_test_routine