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Diffstat (limited to 'tex/context/base/mkiv/meta-fun.lua')
-rw-r--r-- | tex/context/base/mkiv/meta-fun.lua | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/meta-fun.lua b/tex/context/base/mkiv/meta-fun.lua new file mode 100644 index 000000000..7aaaf2818 --- /dev/null +++ b/tex/context/base/mkiv/meta-fun.lua @@ -0,0 +1,57 @@ +if not modules then modules = { } end modules ['meta-fun'] = { + version = 1.001, + comment = "companion to meta-fun.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files", +} + +-- very experimental, actually a joke ... see metafun manual for usage + +local format, load, type = string.format, load, type + +local metapost = metapost + +metapost.metafun = metapost.metafun or { } +local metafun = metapost.metafun + +function metafun.topath(t,connector) + context("(") + if #t > 0 then + for i=1,#t do + if i > 1 then + context(connector or "..") + end + local ti = t[i] + if type(ti) == "string" then + context(ti) + else + context("(%F,%F)",ti.x or ti[1] or 0,ti.y or ti[2] or 0) + end + end + else + context("origin") + end + context(")") +end + +function metafun.interpolate(f,b,e,s,c) + local done = false + context("(") + for i=b,e,(e-b)/s do + local d = load(format("return function(x) return %s end",f)) + if d then + d = d() + if done then + context(c or "...") + else + done = true + end + context("(%F,%F)",i,d(i)) + end + end + if not done then + context("origin") + end + context(")") +end |