MicroManager grid positions

make_pos.rb

#!/usr/bin/env ruby

require 'json'
include Math

# User parameters
# a: origin (in um)
# b: the 2nd point to define an axis
#    Two axes will be (1) b-a and (2) 90 deg clockwise rotation of b-a.
# len: grid interval
# xlimit, ylimit: Allowed range (possible maximum absolute value) of x and y.
a = [-1663,-4787]
b = [1029,-4826]
len = 500
xlimit = 8000
ylimit = 5000

def norm2(v)
	v[0]*v[0] + v[1]*v[1]
end

v = [b[0]-a[0],b[1]-a[1]]
n = sqrt(norm2(v))
v1 = [v[0]/n*len,v[1]/n*len]
v2 = [-v1[1],v1[0]]

count = 0
col = 10
row = 6
moves = ([1] + [[1]*(col-2) + [2] + [3]*(col-2) + [2]]*(row/2)).flatten
xi = 0
yi = 0
poss = []

moves.each{|m|
	x = a[0] + xi*v1[0] + yi*v2[0]
	y = a[1] + xi*v1[1] + yi*v2[1]
	if x.abs > xlimit or y.abs > ylimit
		raise "Coordinate out of bound.#{x}"
	end

	count += 1
	poss << {:GRID_COL => 0, :GRID_ROW => 0, :LABEL => "Pos#{count}",
		:DEFAULT_Z_STAGE => "ASI ZStage", :DEFAULT_XY_STAGE => "ASI XYStage",
		:PROPERTIES => {},
		:DEVICES => [{:DEVICE => "ASI XYStage", :AXES => 2, :Y => ("%.1f" % y).to_f, :X => ("%.1f" % x).to_f, :Z => 0}]
	}
	xi += (m == 1 ? 1 : (m == 3 ? -1 : 0))
	yi += (m == 2 ? 1 : (m == 4 ? -1 : 0))
}

obj = {:VERSION => 3, :ID => "Micro-Manager XY-position list",:POSITIONS => poss}

puts JSON.pretty_generate(obj)