1if not modules then modules = { } end modules ['meta-fun'] = {
2 version = 1.001,
3 comment = "companion to meta-fun.mkiv",
4 author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
5 copyright = "PRAGMA ADE / ConTeXt Development Team",
6 license = "see context related readme files",
7}
8
9
10
11local format, load, type = string.format, load, type
12
13local context = context
14local metapost = metapost
15
16metapost.metafun = metapost.metafun or { }
17local metafun = metapost.metafun
18
19function metafun.topath(t,connector)
20 context("(")
21 if #t > 0 then
22 for i=1,#t do
23 if i > 1 then
24 context(connector or "..")
25 end
26 local ti = t[i]
27 if type(ti) == "string" then
28 context(ti)
29 else
30 context("(%F,%F)",ti.x or ti[1] or 0,ti.y or ti[2] or 0)
31 end
32 end
33 else
34 context("origin")
35 end
36 context(")")
37end
38
39function metafun.interpolate(f,b,e,s,c)
40 local done = false
41 context("(")
42 for i=b,e,(e-b)/s do
43 local d = load(format("return function(x) return %s end",f))
44 if d then
45 d = d()
46 if done then
47 context(c or "...")
48 else
49 done = true
50 end
51 context("(%F,%F)",i,d(i))
52 end
53 end
54 if not done then
55 context("origin")
56 end
57 context(")")
58end
59 |
