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if not modules then modules = { } end modules ['mlib-lmp'] = {
version = 1.001,
comment = "companion to mlib-ctx.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files",
}
-- path relates stuff ... todo: use a stack (or numeric index to list)
local type = type
local aux = mp.aux
local mpnumeric = aux.numeric
local mppair = aux.pair
local p = nil
local n = 0
local function mf_path_reset()
p = nil
n = 0
end
local scan = mp.scan
local scannumber = scan.number
local scanpath = scan.path
local function mf_path_length()
p = scanpath()
n = p and #p or 1
mpnumeric(n)
end
local function mf_path_point()
local i = scannumber()
if i > 0 and i <= n then
local pi = p[i]
mppair(pi[1],pi[2])
end
end
local function mf_path_left()
local i = scannumber()
if i > 0 and i <= n then
local pi = p[i]
mppair(pi[5],pi[6])
end
end
local function mf_path_right()
local i = scannumber()
if i > 0 and i <= n then
local pn
if i == 1 then
pn = p[2] or p[1]
else
pn = p[i+1] or p[1]
end
mppair(pn[3],pn[4])
end
end
local registerscript = metapost.registerscript
registerscript("pathreset", mf_path_reset)
registerscript("pathlengthof", mf_path_length)
registerscript("pathpointof", mf_path_point)
registerscript("pathleftof", mf_path_left)
registerscript("pathrightof", mf_path_right)
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