ficomp

local function computePath(origin, destination)
	sPath = { }

	local diff = (destination.pos - origin.pos)
	local direction = vector.new(diff.x / (math.abs(diff.x) + math.abs(diff.y)), diff.y / (math.abs(diff.x) + math.abs(diff.y)))


	local x,y = origin.pos.x, origin.pos.y
	local stepsLeft = math.abs(diff.x) + math.abs(diff.y)

	while stepsLeft > 0 do
		x = x + direction.x
		y = y + direction.y
		table.insert(sPath, { pos = vector.new(x, y), colour = colours.orange })
		stepsLeft = stepsLeft - (math.abs(direction.x) + math.abs(direction.y))
	end

	assert(sPath[#sPath].pos.x == destination.pos.x, sPath[#sPath].pos.x.." neq "..destination.pos.x)
end

computePath({ pos = vector.new(10,20) }, { pos = vector.new(15,11) })