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CD ROM Paradise Collection 4
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CD ROM Paradise Collection 4 1995 Nov.iso
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adaptor.zip
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flow.f
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1993-06-28
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51 lines
program flow
implicit none
integer x_dim, y_dim, points
parameter (x_dim = 256, y_dim=256)
parameter (points = 256)
integer i, j
real x_coord(points), y_coord(points), dx (points), dy (points)
integer image_buffer (256,256)
integer x (points), y (points)
integer color (points)
integer dummy
call x_display_init (x_dim, y_dim)
x_coord = 0
y_coord = 0
do i = 1,points
x_coord(i)=sin(i*2*3.1415926*8/real(points))
$ *(real(i)/real(points))
end do
do i = 1,points
y_coord(i)=cos(i*2*3.1415926*8/real(points))
$ *(real(i)/real(points))
end do
x_coord = 0.5*x_coord
y_coord = 0.5*y_coord
do i = 1, 250
dx = x_coord + (i/25.0) * y_coord * x_coord
dy = - y_coord - (i/50.0) * x_coord * (y_coord-x_coord)
x_coord = x_coord + 0.01 * dx
y_coord = y_coord + 0.01 * dy
c display all points
image_buffer = 50
do j = 1, points
x(j) = 128 + x_coord(j) * 128
y(j) = 128 + y_coord(j) * 128
color (j) = 255
end do
do j = 1, points
if ( (x(j) .gt. 0) .and. (x(j) .le. 256) .and.
$ (y(j) .gt. 0) .and. (y(j) .le. 256) ) then
image_buffer (x(j),y(j)) = color (j)
end if
end do
call x_show_bild (image_buffer)
end do
read *, dummy
end