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Constrained random points on a circle: Difference between revisions
Constrained random points on a circle (view source)
Revision as of 03:26, 10 May 2011
, 13 years ago→Icon and Unicon
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=={{header|Icon}} and {{header|Unicon}}==
Generate random points in the bounded by the outside edge. Reject any found out of the prescribed bounds and stop when the required numbers of points have been generated.
<lang Icon>link graphics
procedure main(A) # points, inside r, outside r in pixels - default to task values
points := \A[1] | 100
outside := \A[2] | 15
inside := \A[3] | 10
wsize := integer(2.2*outside)
wsize <:= 150
center := wsize/2
WOpen("size="||wsize||","||wsize,"bg=black","fg=white") | stop("Unable to open window")
until(points -:= 1) <= 0 do {
x := ?(2*outside)-outside # random x
y := ?(2*outside)-outside # and y
if (inside <= integer(sqrt(x^2+y^2)) ) <= outside then
DrawPoint(x + center,y + center)
}
WDone()
end</lang>
=={{header|J}}==
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