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1if not modules then modules = { } end modules ['grph-u3d'] = {
2    version   = 1.001,
3    comment   = "companion to grph-inc.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-- see lpdf-u3d.lua for comment
10
11-- maybe: backends.codeinjections.insertu3d
12
13local trace_inclusion = false  trackers.register("figures.inclusion",  function(v) trace_inclusion = v end)
14
15local report_u3d = logs.reporter("graphics","u3d")
16
17local figures         = figures
18local context         = context
19local nodeinjections  = backends.nodeinjections
20local todimen         = string.todimen
21
22function figures.checkers.u3d(data)
23    local dr, du, ds = data.request, data.used, data.status
24    local width = todimen(dr.width or figures.defaultwidth)
25    local height = todimen(dr.height or figures.defaultheight)
26    local foundname = du.fullname
27    dr.width, dr.height = width, height
28    du.width, du.height, du.foundname = width, height, foundname
29    if trace_inclusion then
30        report_u3d("including u3d %a, width %p, height %p",foundname,width,height)
31    end
32    context.startfoundexternalfigure(width .. "sp",height .. "sp")
33    context(function()
34        nodeinjections.insertu3d {
35            foundname  = foundname,
36            width      = width,
37            height     = height,
38            factor     = number.dimenfactors.bp,
39            display    = dr.display,
40            controls   = dr.controls,
41            label      = dr.label,
42        }
43    end)
44    context.stopfoundexternalfigure()
45    return data
46end
47
48figures.includers.u3d = figures.includers.nongeneric
49
50-- figures.checkers .prc = figures.checkers.u3d
51-- figures.includers.prc = figures.includers.nongeneric
52
53figures.registersuffix("u3d","u3d")
54figures.registersuffix("prc","u3d")
55