1if not modules then modules = { } end modules ['mlib-lmt'] = {
2 version = 1.001,
3 comment = "companion to mlib-ctx.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 type = type
12local round, abs = math.round, math.abs
13
14local aux = mp.aux
15local mpdirect = aux.direct
16local mppath = mp.path
17
18local scan = mp.scan
19local scannumeric = scan.numeric
20local scanpath = scan.path
21
22local injectpath = mp.inject.path
23local injectcolor = mp.inject.color
24
25local getparameter = metapost.getparameter
26local registerscript = metapost.registerscript
27
28function mp.lmt_function_x(xmin,xmax,xstep,code,shape)
29 local code = "return function(x) return " .. code .. " end"
30 local action = load(code)
31 local points = { }
32 local nofpoints = 0
33 if action then
34 action = action()
35 end
36 if shape == "steps" then
37 local halfx = xstep / 2
38 local lastx = xmin
39 local lasty = action(xmin)
40 for xi = xmin, xmax, xstep do
41 local yi = action(xi)
42 local xx = lastx + halfx
43 nofpoints = nofpoints + 1 ; points[nofpoints] = { xx, lasty }
44 nofpoints = nofpoints + 1 ; points[nofpoints] = { xx, yi }
45 lastx = xi
46 lasty = yi
47 end
48 if points[nofpoints][1] ~= xmax then
49 local yi = action(xmax)
50 local xx = lastx + halfx
51 nofpoints = nofpoints + 1 ; points[nofpoints] = { xx, lasty }
52 nofpoints = nofpoints + 1 ; points[nofpoints] = { xx, yi }
53 lastx = xi
54 lasty = yi
55 end
56 else
57 for xi = xmin, xmax, xstep do
58 nofpoints = nofpoints + 1 ; points[nofpoints] = { xi, action(xi) }
59 end
60 if points[nofpoints][1] ~= xmax then
61 nofpoints = nofpoints + 1 ; points[nofpoints] = { xmax, action(xmax) }
62 end
63 end
64 mppath(points,shape == "curve" and ".." or "--",false)
65end
66
67function mp.lmt_mesh_set()
68 local mesh = getparameter { "mesh", "paths" }
69 structures.references.currentset.mesh = mesh
70end
71
72function mp.lmt_mesh_update()
73 local mesh = getparameter { "paths" } or getparameter { "mesh", "paths" }
74 mesh[scannumeric()] = scanpath(true)
75end
76
77
78
79function mp.lmt_svg_include()
80 local labelfile = metapost.getparameter { "labelfile" }
81 if labelfile and labelfile ~= "" then
82 labelfile = resolvers.findbinfile(labelfile)
83 end
84 if labelfile and labelfile ~= "" then
85 local labels = table.load(labelfile)
86 if type(labels) == "table" then
87 for i=1,#labels do
88 metapost.remaptext(labels[i])
89 end
90 end
91 end
92 local fontname = metapost.getparameter { "fontname" }
93 if fontname and fontname ~= "" then
94 local unicode = metapost.getparameter { "unicode" }
95 if unicode then
96 mpdirect (
97 metapost.svgglyphtomp(fontname,math.round(unicode))
98 )
99 end
100 return
101 end
102 local colorfile = metapost.getparameter { "colormap" }
103 local colormap = false
104 if colorfile and colorfile ~= "" then
105 colormap = metapost.svgcolorremapper(colorfile)
106 end
107 local filename = metapost.getparameter { "filename" }
108 if filename and filename ~= "" then
109 local ok, data = resolvers.loadbinfile(filename)
110 mpdirect ( metapost.svgtomp {
111 data = data,
112 remap = true,
113 colormap = colormap,
114 id = filename,
115 } )
116 else
117 local buffer = metapost.getparameter { "buffer" }
118 if buffer then
119 mpdirect ( metapost.svgtomp {
120 data = buffers.getcontent(buffer),
121
122 colormap = colormap,
123 id = buffer or "buffer",
124 } )
125 else
126 local code = metapost.getparameter { "code" }
127 if code then
128 mpdirect ( metapost.svgtomp {
129 data = code,
130 colormap = colormap,
131 id = "code",
132 } )
133 end
134 end
135 end
136end
137
138registerscript("remaptext", function()
139 local parameters = metapost.scanparameters(true)
140 if parameters and parameters.label then
141 metapost.remaptext(parameters)
142 end
143end)
144
145do
146
147 local dropins = fonts.dropins
148 local registerglyph = dropins.registerglyph
149 local registerglyphs = dropins.registerglyphs
150
151 registerscript("registerglyph", function() registerglyph (metapost.getparameterset("mpsglyph")) end)
152 registerscript("registerglyphs",function() registerglyphs(metapost.getparameterset("mpsglyphs")) end)
153
154end
155
156todecimal = xdecimal and xdecimal.new or tonumber
157
158
159
160registerscript("scrutinized", function()
161 local pth = scanpath()
162 local d = 1/10^scannumeric()
163 local p1 = pth[1]
164 local x1 = p1[1]
165 local y1 = p1[2]
166 local res = { pth[1] }
167 local r = 1
168 for i=2,#pth do
169 local pi = pth[i]
170 x2 = pi[1]
171 y2 = pi[2]
172 if abs(x1-x2) > d or abs(y1-y2) > d then
173 r = r + 1 res[r] = pi
174 x1 = x2
175 y1 = y2
176 else
177 res[r][5] = pi[5]
178 res[r][6] = pi[6]
179 end
180 end
181 if pth.cycle then
182 res.cycle = true
183 if abs(x1-p1[1]) > d or abs(y1-p1[2]) > d then
184
185 else
186 res[r] = nil
187 end
188 end
189 injectpath(res)
190end)
191
192
193
194local labtorgb = attributes.colors.labtorgb
195
196registerscript("labtorgb", function()
197 injectcolor(labtorgb(scannumeric(),scannumeric(),scannumeric()))
198end)
199 |
