diff options
author | Hans Hagen <pragma@wxs.nl> | 2013-05-19 19:27:00 +0200 |
---|---|---|
committer | Hans Hagen <pragma@wxs.nl> | 2013-05-19 19:27:00 +0200 |
commit | 9a10021cd4cb23995ad3ffa915fc5b7f6890aaf8 (patch) | |
tree | 983e02c29872e4713a10a9dc8ae7708c6da3de88 /tex/context/base/lpdf-u3d.lua | |
parent | 0deffde58a47f5c85a46a7d999ff9cf817b81cef (diff) | |
download | context-9a10021cd4cb23995ad3ffa915fc5b7f6890aaf8.tar.gz |
beta 2013.05.19 19:27
Diffstat (limited to 'tex/context/base/lpdf-u3d.lua')
-rw-r--r-- | tex/context/base/lpdf-u3d.lua | 976 |
1 files changed, 488 insertions, 488 deletions
diff --git a/tex/context/base/lpdf-u3d.lua b/tex/context/base/lpdf-u3d.lua index 33269486c..464ea6fa7 100644 --- a/tex/context/base/lpdf-u3d.lua +++ b/tex/context/base/lpdf-u3d.lua @@ -1,488 +1,488 @@ -if not modules then modules = { } end modules ['lpdf-u3d'] = { - version = 1.001, - comment = "companion to lpdf-ini.mkiv", - author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", - copyright = "PRAGMA ADE / ConTeXt Development Team", - license = "see context related readme files" -} - --- The following code is based on a working prototype provided --- by Michael Vidiassov. It is rewritten using the lpdf library --- and different checking is used. The macro calls are adapted --- (and will eventually be removed). The user interface needs --- an overhaul. There are some messy leftovers that will be --- removed in future versions. - --- For some reason no one really tested this code so at some --- point we will end up with a reimplementation. For instance --- it makes sense to add the same activation code as with swf. - -local format, find = string.format, string.find -local cos, sin, sqrt, pi, atan2, abs = math.cos, math.sin, math.sqrt, math.pi, math.atan2, math.abs - -local backends, lpdf = backends, lpdf - -local nodeinjections = backends.pdf.nodeinjections - -local pdfconstant = lpdf.constant -local pdfboolean = lpdf.boolean -local pdfnumber = lpdf.number -local pdfunicode = lpdf.unicode -local pdfdictionary = lpdf.dictionary -local pdfarray = lpdf.array -local pdfnull = lpdf.null -local pdfreference = lpdf.reference -local pdfflushstreamobject = lpdf.flushstreamobject -local pdfflushstreamfileobject = lpdf.flushstreamfileobject - -local checkedkey = lpdf.checkedkey -local limited = lpdf.limited - -local pdfannotation_node = nodes.pool.pdfannotation - -local schemes = table.tohash { - "Artwork", "None", "White", "Day", "Night", "Hard", - "Primary", "Blue", "Red", "Cube", "CAD", "Headlamp", -} - -local modes = table.tohash { - "Solid", "SolidWireframe", "Transparent", "TransparentWireframe", "BoundingBox", - "TransparentBoundingBox", "TransparentBoundingBoxOutline", "Wireframe", - "ShadedWireframe", "HiddenWireframe", "Vertices", "ShadedVertices", "Illustration", - "SolidOutline", "ShadedIllustration", -} - -local function normalize(x, y, z) - local modulo = sqrt(x*x + y*y + z*z); - if modulo ~= 0 then - return x/modulo, y/modulo, z/modulo - else - return x, y, z - end -end - -local function rotate(vect_x,vect_y,vect_z, tet, axis_x,axis_y,axis_z) - -- rotate vect by tet about axis counterclockwise - local c, s = cos(tet*pi/180), sin(tet*pi/180) - local r = 1 - c - local n = sqrt(axis_x*axis_x+axis_y*axis_y+axis_z*axis_z) - axis_x, axis_y, axis_z = axis_x/n, axis_y/n, axis_z/n - return - (axis_x*axis_x*r+c )*vect_x + (axis_x*axis_y*r-axis_z*s)*vect_y + (axis_x*axis_z*r+axis_y*s)*vect_z, - (axis_x*axis_y*r+axis_z*s)*vect_x + (axis_y*axis_y*r+c )*vect_y + (axis_y*axis_z*r-axis_x*s)*vect_z, - (axis_x*axis_z*r-axis_y*s)*vect_x + (axis_y*axis_z*r+axis_x*s)*vect_y + (axis_z*axis_z*r+c )*vect_z -end - -local function make3dview(view) - - local name = view.name - local name = pdfunicode(name ~= "" and name or "unknown view") - - local viewdict = pdfdictionary { - Type = pdfconstant("3DView"), - XN = name, - IN = name, - NR = true, - } - - local bg = checkedkey(view,"bg","table") - if bg then - viewdict.BG = pdfdictionary { - Type = pdfconstant("3DBG"), - C = pdfarray { limited(bg[1],1,1,1), limited(bg[2],1,1,1), limited(bg[3],1,1,1) }, - } - end - - local lights = checkedkey(view,"lights","string") - if lights and schemes[lights] then - viewdict.LS = pdfdictionary { - Type = pdfconstant("3DLightingScheme"), - Subtype = pdfconstant(lights), - } - end - - -- camera position is taken from 3d model - - local u3dview = checkedkey(view, "u3dview", "string") - if u3dview then - viewdict.MS = pdfconstant("U3D") - viewdict.U3DPath = u3dview - end - - -- position the camera as given - - local c2c = checkedkey(view, "c2c", "table") - local coo = checkedkey(view, "coo", "table") - local roo = checkedkey(view, "roo", "number") - local azimuth = checkedkey(view, "azimuth", "number") - local altitude = checkedkey(view, "altitude", "number") - - if c2c or coo or roo or azimuth or altitude then - - local pos = checkedkey(view, "pos", "table") - local dir = checkedkey(view, "dir", "table") - local upv = checkedkey(view, "upv", "table") - local roll = checkedkey(view, "roll", "table") - - local coo_x, coo_y, coo_z = 0, 0, 0 - local dir_x, dir_y, dir_z = 0, 0, 0 - local trans_x, trans_y, trans_z = 0, 0, 0 - local left_x, left_y, left_z = 0, 0, 0 - local up_x, up_y, up_z = 0, 0, 0 - - -- point camera is aimed at - - if coo then - coo_x, coo_y, coo_z = tonumber(coo[1]) or 0, tonumber(coo[2]) or 0, tonumber(coo[3]) or 0 - end - - -- distance from camera to target - - if roo then - roo = abs(roo) - end - if not roo or roo == 0 then - roo = 0.000000000000000001 - end - - -- set it via camera position - - if pos then - dir_x = coo_x - (tonumber(pos[1]) or 0) - dir_y = coo_y - (tonumber(pos[2]) or 0) - dir_z = coo_z - (tonumber(pos[3]) or 0) - if not roo then - roo = sqrt(dir_x*dir_x + dir_y*dir_y + dir_z*dir_z) - end - if dir_x == 0 and dir_y == 0 and dir_z == 0 then dir_y = 1 end - dir_x, dir_y, dir_z = normalize(dir_x,dir_y,dir_z) - end - - -- set it directly - - if dir then - dir_x, dir_y, dir_z = tonumber(dir[1] or 0), tonumber(dir[2] or 0), tonumber(dir[3] or 0) - if dir_x == 0 and dir_y == 0 and dir_z == 0 then dir_y = 1 end - dir_x, dir_y, dir_z = normalize(dir_x,dir_y,dir_z) - end - - -- set it movie15 style with vector from target to camera - - if c2c then - dir_x, dir_y, dir_z = - tonumber(c2c[1] or 0), - tonumber(c2c[2] or 0), - tonumber(c2c[3] or 0) - if dir_x == 0 and dir_y == 0 and dir_z == 0 then dir_y = 1 end - dir_x, dir_y, dir_z = normalize(dir_x,dir_y,dir_z) - end - - -- set it with azimuth and altitutde - - if altitude or azimuth then - dir_x, dir_y, dir_z = -1, 0, 0 - if altitude then dir_x, dir_y, dir_z = rotate(dir_x,dir_y,dir_z, -altitude, 0,1,0) end - if azimuth then dir_x, dir_y, dir_z = rotate(dir_x,dir_y,dir_z, azimuth, 0,0,1) end - end - - -- set it with rotation like in MathGL - - if rot then - if dir_x == 0 and dir_y == 0 and dir_z == 0 then dir_z = -1 end - dir_x,dir_y,dir_z = rotate(dir_x,dir_y,dir_z, tonumber(rot[1]) or 0, 1,0,0) - dir_x,dir_y,dir_z = rotate(dir_x,dir_y,dir_z, tonumber(rot[2]) or 0, 0,1,0) - dir_x,dir_y,dir_z = rotate(dir_x,dir_y,dir_z, tonumber(rot[3]) or 0, 0,0,1) - end - - -- set it with default movie15 orientation looking up y axis - - if dir_x == 0 and dir_y == 0 and dir_z == 0 then dir_y = 1 end - - -- left-vector - -- up-vector - - if upv then - up_x, up_y, up_z = tonumber(upv[1]) or 0, tonumber(upv[2]) or 0, tonumber(upv[3]) or 0 - else - -- set default up-vector - if abs(dir_x) == 0 and abs(dir_y) == 0 then - if dir_z < 0 then - up_y = 1 -- top view - else - up_y = -1 -- bottom view - end - else - -- other camera positions than top and bottom, up-vector = up_world - (up_world dot dir) dir - up_x, up_y, up_z = - dir_z*dir_x, - dir_z*dir_y, - dir_z*dir_z + 1 - end - end - - -- normalize up-vector - - up_x, up_y, up_z = normalize(up_x,up_y,up_z) - - -- left vector = up x dir - - left_x, left_y, left_z = dir_z*up_y - dir_y*up_z, dir_x*up_z - dir_z*up_x, dir_y*up_x - dir_x*up_y - - -- normalize left vector - - left_x, left_y, left_z = normalize(left_x,left_y,left_z) - - -- apply camera roll - - if roll then - local sinroll = sin((roll/180.0)*pi) - local cosroll = cos((roll/180.0)*pi) - left_x = left_x*cosroll + up_x*sinroll - left_y = left_y*cosroll + up_y*sinroll - left_z = left_z*cosroll + up_z*sinroll - up_x = up_x*cosroll + left_x*sinroll - up_y = up_y*cosroll + left_y*sinroll - up_z = up_z*cosroll + left_z*sinroll - end - - -- translation vector - - trans_x, trans_y, trans_z = coo_x - roo*dir_x, coo_y - roo*dir_y, coo_z - roo*dir_z - - viewdict.MS = pdfconstant("M") - viewdict.CO = roo - viewdict.C2W = pdfarray { - left_x, left_y, left_z, - up_x, up_y, up_z, - dir_x, dir_y, dir_z, - trans_x, trans_y, trans_z, - } - - end - - local aac = tonumber(view.aac) -- perspective projection - local mag = tonumber(view.mag) -- ortho projection - - if aac and aac > 0 and aac < 180 then - viewdict.P = pdfdictionary { - Subtype = pdfconstant("P"), - PS = pdfconstant("Min"), - FOV = aac, - } - elseif mag and mag > 0 then - viewdict.P = pdfdictionary { - Subtype = pdfconstant("O"), - OS = mag, - } - end - - local mode = modes[view.rendermode] - if mode then - pdfdictionary { - Type = pdfconstant("3DRenderMode"), - Subtype = pdfconstant(mode), - } - end - - -- crosssection - - local crosssection = checkedkey(view,"crosssection","table") - if crosssection then - local crossdict = pdfdictionary { - Type = pdfconstant("3DCrossSection") - } - - local c = checkedkey(crosssection,"point","table") or checkedkey(crosssection,"center","table") - if c then - crossdict.C = pdfarray { tonumber(c[1]) or 0, tonumber(c[2]) or 0, tonumber(c[3]) or 0 } - end - - local normal = checkedkey(crosssection,"normal","table") - if normal then - local x, y, z = tonumber(normal[1] or 0), tonumber(normal[2] or 0), tonumber(normal[3] or 0) - if sqrt(x*x + y*y + z*z) == 0 then - x, y, z = 1, 0, 0 - end - crossdict.O = pdfarray { - pdfnull, - atan2(-z,sqrt(x*x + y*y))*180/pi, - atan2(y,x)*180/pi, - } - end - - local orient = checkedkey(crosssection,"orient","table") - if orient then - crossdict.O = pdfarray { - tonumber(orient[1]) or 1, - tonumber(orient[2]) or 0, - tonumber(orient[3]) or 0, - } - end - - crossdict.IV = cross.intersection or false - crossdict.ST = cross.transparent or false - - viewdict.SA = next(crossdict) and pdfarray { crossdict } -- maybe test if # > 1 - end - - local nodes = checkedkey(view,"nodes","table") - if nodes then - local nodelist = pdfarray() - for i=1,#nodes do - local node = checkedkey(nodes,i,"table") - if node then - local position = checkedkey(node,"position","table") - nodelist[#nodelist+1] = pdfdictionary { - Type = pdfconstant("3DNode"), - N = node.name or ("node_" .. i), -- pdfunicode ? - M = position and #position == 12 and pdfarray(position), - V = node.visible or true, - O = node.opacity or 0, - RM = pdfdictionary { - Type = pdfconstant("3DRenderMode"), - Subtype = pdfconstant(node.rendermode or "Solid"), - }, - } - end - end - viewdict.NA = nodelist - end - - return viewdict - -end - -local stored_js, stored_3d, stored_pr, streams = { }, { }, { }, { } - -local function insert3d(spec) -- width, height, factor, display, controls, label, foundname - - local width, height, factor = spec.width, spec.height, spec.factor or number.dimenfactors.bp - local display, controls, label, foundname = spec.display, spec.controls, spec.label, spec.foundname - - local param = (display and parametersets[display]) or { } - local streamparam = (controls and parametersets[controls]) or { } - local name = "3D Artwork " .. (param.name or label or "Unknown") - - local activationdict = pdfdictionary { - TB = pdfboolean(param.toolbar,true), - NP = pdfboolean(param.tree,false), - } - - local stream = streams[label] - if not stream then - - local subtype, subdata = "U3D", io.loaddata(foundname) or "" - if find(subdata,"^PRC") then - subtype = "PRC" - elseif find(subdata,"^U3D") then - subtype = "U3D" - elseif file.suffix(foundname) == "prc" then - subtype = "PRC" - end - - local attr = pdfdictionary { - Type = pdfconstant("3D"), - Subtype = pdfconstant(subtype), - } - local streamviews = checkedkey(streamparam, "views", "table") - if streamviews then - local list = pdfarray() - for i=1,#streamviews do - local v = checkedkey(streamviews, i, "table") - if v then - list[#list+1] = make3dview(v) - end - end - attr.VA = list - end - if checkedkey(streamparam, "view", "table") then - attr.DV = make3dview(streamparam.view) - elseif checkedkey(streamparam, "view", "string") then - attr.DV = streamparam.view - end - local js = checkedkey(streamparam, "js", "string") - if js then - local jsref = stored_js[js] - if not jsref then - jsref = pdfflushstreamfileobject(js) - stored_js[js] = jsref - end - attr.OnInstantiate = pdfreference(jsref) - end - stored_3d[label] = pdfflushstreamfileobject(foundname,attr) - stream = 1 - else - stream = stream + 1 - end - streams[label] = stream - - local name = pdfunicode(name) - - local annot = pdfdictionary { - Subtype = pdfconstant("3D"), - T = name, - Contents = name, - NM = name, - ["3DD"] = pdfreference(stored_3d[label]), - ["3DA"] = activationdict, - } - if checkedkey(param,"view","table") then - annot["3DV"] = make3dview(param.view) - elseif checkedkey(param,"view","string") then - annot["3DV"] = param.view - end - - local preview = checkedkey(param,"preview","string") - if preview then - activationdict.A = pdfconstant("XA") - local tag = format("%s:%s:%s",label,stream,preview) - local ref = stored_pr[tag] - if not ref then - local figure = img.immediatewrite { - filename = preview, - width = width, - height = height - } - ref = figure.objnum - stored_pr[tag] = ref - end - if ref then -- see back-pdf ** .. here we have a local /IM ! - local zero, one = pdfnumber(0), pdfnumber(1) -- not really needed - local pw = pdfdictionary { - Type = pdfconstant("XObject"), - Subtype = pdfconstant("Form"), - FormType = one, - BBox = pdfarray { zero, zero, pdfnumber(factor*width), pdfnumber(factor*height) }, - Matrix = pdfarray { one, zero, zero, one, zero, zero }, - Resources = pdfdictionary { - XObject = pdfdictionary { - IM = pdfreference(ref) - } - }, - ExtGState = pdfdictionary { - GS = pdfdictionary { - Type = pdfconstant("ExtGState"), - CA = one, - ca = one, - } - }, - ProcSet = pdfarray { pdfconstant("PDF"), pdfconstant("ImageC") }, - } - local pwd = pdfflushstreamobject(format("q /GS gs %f 0 0 %f 0 0 cm /IM Do Q",factor*width,factor*height),pw) - annot.AP = pdfdictionary { - N = pdfreference(pwd) - } - end - return annot, figure, ref - else - activationdict.A = pdfconstant("PV") - return annot, nil, nil - end -end - -function nodeinjections.insertu3d(spec) - local annotation, preview, ref = insert3d { -- just spec - foundname = spec.foundname, - width = spec.width, - height = spec.height, - factor = spec.factor, - display = spec.display, - controls = spec.controls, - label = spec.label, - } - node.write(pdfannotation_node(spec.width,spec.height,0,annotation())) -end +if not modules then modules = { } end modules ['lpdf-u3d'] = {
+ version = 1.001,
+ comment = "companion to lpdf-ini.mkiv",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+-- The following code is based on a working prototype provided
+-- by Michael Vidiassov. It is rewritten using the lpdf library
+-- and different checking is used. The macro calls are adapted
+-- (and will eventually be removed). The user interface needs
+-- an overhaul. There are some messy leftovers that will be
+-- removed in future versions.
+
+-- For some reason no one really tested this code so at some
+-- point we will end up with a reimplementation. For instance
+-- it makes sense to add the same activation code as with swf.
+
+local format, find = string.format, string.find
+local cos, sin, sqrt, pi, atan2, abs = math.cos, math.sin, math.sqrt, math.pi, math.atan2, math.abs
+
+local backends, lpdf = backends, lpdf
+
+local nodeinjections = backends.pdf.nodeinjections
+
+local pdfconstant = lpdf.constant
+local pdfboolean = lpdf.boolean
+local pdfnumber = lpdf.number
+local pdfunicode = lpdf.unicode
+local pdfdictionary = lpdf.dictionary
+local pdfarray = lpdf.array
+local pdfnull = lpdf.null
+local pdfreference = lpdf.reference
+local pdfflushstreamobject = lpdf.flushstreamobject
+local pdfflushstreamfileobject = lpdf.flushstreamfileobject
+
+local checkedkey = lpdf.checkedkey
+local limited = lpdf.limited
+
+local pdfannotation_node = nodes.pool.pdfannotation
+
+local schemes = table.tohash {
+ "Artwork", "None", "White", "Day", "Night", "Hard",
+ "Primary", "Blue", "Red", "Cube", "CAD", "Headlamp",
+}
+
+local modes = table.tohash {
+ "Solid", "SolidWireframe", "Transparent", "TransparentWireframe", "BoundingBox",
+ "TransparentBoundingBox", "TransparentBoundingBoxOutline", "Wireframe",
+ "ShadedWireframe", "HiddenWireframe", "Vertices", "ShadedVertices", "Illustration",
+ "SolidOutline", "ShadedIllustration",
+}
+
+local function normalize(x, y, z)
+ local modulo = sqrt(x*x + y*y + z*z);
+ if modulo ~= 0 then
+ return x/modulo, y/modulo, z/modulo
+ else
+ return x, y, z
+ end
+end
+
+local function rotate(vect_x,vect_y,vect_z, tet, axis_x,axis_y,axis_z)
+ -- rotate vect by tet about axis counterclockwise
+ local c, s = cos(tet*pi/180), sin(tet*pi/180)
+ local r = 1 - c
+ local n = sqrt(axis_x*axis_x+axis_y*axis_y+axis_z*axis_z)
+ axis_x, axis_y, axis_z = axis_x/n, axis_y/n, axis_z/n
+ return
+ (axis_x*axis_x*r+c )*vect_x + (axis_x*axis_y*r-axis_z*s)*vect_y + (axis_x*axis_z*r+axis_y*s)*vect_z,
+ (axis_x*axis_y*r+axis_z*s)*vect_x + (axis_y*axis_y*r+c )*vect_y + (axis_y*axis_z*r-axis_x*s)*vect_z,
+ (axis_x*axis_z*r-axis_y*s)*vect_x + (axis_y*axis_z*r+axis_x*s)*vect_y + (axis_z*axis_z*r+c )*vect_z
+end
+
+local function make3dview(view)
+
+ local name = view.name
+ local name = pdfunicode(name ~= "" and name or "unknown view")
+
+ local viewdict = pdfdictionary {
+ Type = pdfconstant("3DView"),
+ XN = name,
+ IN = name,
+ NR = true,
+ }
+
+ local bg = checkedkey(view,"bg","table")
+ if bg then
+ viewdict.BG = pdfdictionary {
+ Type = pdfconstant("3DBG"),
+ C = pdfarray { limited(bg[1],1,1,1), limited(bg[2],1,1,1), limited(bg[3],1,1,1) },
+ }
+ end
+
+ local lights = checkedkey(view,"lights","string")
+ if lights and schemes[lights] then
+ viewdict.LS = pdfdictionary {
+ Type = pdfconstant("3DLightingScheme"),
+ Subtype = pdfconstant(lights),
+ }
+ end
+
+ -- camera position is taken from 3d model
+
+ local u3dview = checkedkey(view, "u3dview", "string")
+ if u3dview then
+ viewdict.MS = pdfconstant("U3D")
+ viewdict.U3DPath = u3dview
+ end
+
+ -- position the camera as given
+
+ local c2c = checkedkey(view, "c2c", "table")
+ local coo = checkedkey(view, "coo", "table")
+ local roo = checkedkey(view, "roo", "number")
+ local azimuth = checkedkey(view, "azimuth", "number")
+ local altitude = checkedkey(view, "altitude", "number")
+
+ if c2c or coo or roo or azimuth or altitude then
+
+ local pos = checkedkey(view, "pos", "table")
+ local dir = checkedkey(view, "dir", "table")
+ local upv = checkedkey(view, "upv", "table")
+ local roll = checkedkey(view, "roll", "table")
+
+ local coo_x, coo_y, coo_z = 0, 0, 0
+ local dir_x, dir_y, dir_z = 0, 0, 0
+ local trans_x, trans_y, trans_z = 0, 0, 0
+ local left_x, left_y, left_z = 0, 0, 0
+ local up_x, up_y, up_z = 0, 0, 0
+
+ -- point camera is aimed at
+
+ if coo then
+ coo_x, coo_y, coo_z = tonumber(coo[1]) or 0, tonumber(coo[2]) or 0, tonumber(coo[3]) or 0
+ end
+
+ -- distance from camera to target
+
+ if roo then
+ roo = abs(roo)
+ end
+ if not roo or roo == 0 then
+ roo = 0.000000000000000001
+ end
+
+ -- set it via camera position
+
+ if pos then
+ dir_x = coo_x - (tonumber(pos[1]) or 0)
+ dir_y = coo_y - (tonumber(pos[2]) or 0)
+ dir_z = coo_z - (tonumber(pos[3]) or 0)
+ if not roo then
+ roo = sqrt(dir_x*dir_x + dir_y*dir_y + dir_z*dir_z)
+ end
+ if dir_x == 0 and dir_y == 0 and dir_z == 0 then dir_y = 1 end
+ dir_x, dir_y, dir_z = normalize(dir_x,dir_y,dir_z)
+ end
+
+ -- set it directly
+
+ if dir then
+ dir_x, dir_y, dir_z = tonumber(dir[1] or 0), tonumber(dir[2] or 0), tonumber(dir[3] or 0)
+ if dir_x == 0 and dir_y == 0 and dir_z == 0 then dir_y = 1 end
+ dir_x, dir_y, dir_z = normalize(dir_x,dir_y,dir_z)
+ end
+
+ -- set it movie15 style with vector from target to camera
+
+ if c2c then
+ dir_x, dir_y, dir_z = - tonumber(c2c[1] or 0), - tonumber(c2c[2] or 0), - tonumber(c2c[3] or 0)
+ if dir_x == 0 and dir_y == 0 and dir_z == 0 then dir_y = 1 end
+ dir_x, dir_y, dir_z = normalize(dir_x,dir_y,dir_z)
+ end
+
+ -- set it with azimuth and altitutde
+
+ if altitude or azimuth then
+ dir_x, dir_y, dir_z = -1, 0, 0
+ if altitude then dir_x, dir_y, dir_z = rotate(dir_x,dir_y,dir_z, -altitude, 0,1,0) end
+ if azimuth then dir_x, dir_y, dir_z = rotate(dir_x,dir_y,dir_z, azimuth, 0,0,1) end
+ end
+
+ -- set it with rotation like in MathGL
+
+ if rot then
+ if dir_x == 0 and dir_y == 0 and dir_z == 0 then dir_z = -1 end
+ dir_x,dir_y,dir_z = rotate(dir_x,dir_y,dir_z, tonumber(rot[1]) or 0, 1,0,0)
+ dir_x,dir_y,dir_z = rotate(dir_x,dir_y,dir_z, tonumber(rot[2]) or 0, 0,1,0)
+ dir_x,dir_y,dir_z = rotate(dir_x,dir_y,dir_z, tonumber(rot[3]) or 0, 0,0,1)
+ end
+
+ -- set it with default movie15 orientation looking up y axis
+
+ if dir_x == 0 and dir_y == 0 and dir_z == 0 then dir_y = 1 end
+
+ -- left-vector
+ -- up-vector
+
+ if upv then
+ up_x, up_y, up_z = tonumber(upv[1]) or 0, tonumber(upv[2]) or 0, tonumber(upv[3]) or 0
+ else
+ -- set default up-vector
+ if abs(dir_x) == 0 and abs(dir_y) == 0 then
+ if dir_z < 0 then
+ up_y = 1 -- top view
+ else
+ up_y = -1 -- bottom view
+ end
+ else
+ -- other camera positions than top and bottom, up-vector = up_world - (up_world dot dir) dir
+ up_x, up_y, up_z = - dir_z*dir_x, - dir_z*dir_y, - dir_z*dir_z + 1
+ end
+ end
+
+ -- normalize up-vector
+
+ up_x, up_y, up_z = normalize(up_x,up_y,up_z)
+
+ -- left vector = up x dir
+
+ left_x, left_y, left_z = dir_z*up_y - dir_y*up_z, dir_x*up_z - dir_z*up_x, dir_y*up_x - dir_x*up_y
+
+ -- normalize left vector
+
+ left_x, left_y, left_z = normalize(left_x,left_y,left_z)
+
+ -- apply camera roll
+
+ if roll then
+ local sinroll = sin((roll/180.0)*pi)
+ local cosroll = cos((roll/180.0)*pi)
+ left_x = left_x*cosroll + up_x*sinroll
+ left_y = left_y*cosroll + up_y*sinroll
+ left_z = left_z*cosroll + up_z*sinroll
+ up_x = up_x*cosroll + left_x*sinroll
+ up_y = up_y*cosroll + left_y*sinroll
+ up_z = up_z*cosroll + left_z*sinroll
+ end
+
+ -- translation vector
+
+ trans_x, trans_y, trans_z = coo_x - roo*dir_x, coo_y - roo*dir_y, coo_z - roo*dir_z
+
+ viewdict.MS = pdfconstant("M")
+ viewdict.CO = roo
+ viewdict.C2W = pdfarray {
+ left_x, left_y, left_z,
+ up_x, up_y, up_z,
+ dir_x, dir_y, dir_z,
+ trans_x, trans_y, trans_z,
+ }
+
+ end
+
+ local aac = tonumber(view.aac) -- perspective projection
+ local mag = tonumber(view.mag) -- ortho projection
+
+ if aac and aac > 0 and aac < 180 then
+ viewdict.P = pdfdictionary {
+ Subtype = pdfconstant("P"),
+ PS = pdfconstant("Min"),
+ FOV = aac,
+ }
+ elseif mag and mag > 0 then
+ viewdict.P = pdfdictionary {
+ Subtype = pdfconstant("O"),
+ OS = mag,
+ }
+ end
+
+ local mode = modes[view.rendermode]
+ if mode then
+ pdfdictionary {
+ Type = pdfconstant("3DRenderMode"),
+ Subtype = pdfconstant(mode),
+ }
+ end
+
+ -- crosssection
+
+ local crosssection = checkedkey(view,"crosssection","table")
+ if crosssection then
+ local crossdict = pdfdictionary {
+ Type = pdfconstant("3DCrossSection")
+ }
+
+ local c = checkedkey(crosssection,"point","table") or checkedkey(crosssection,"center","table")
+ if c then
+ crossdict.C = pdfarray { tonumber(c[1]) or 0, tonumber(c[2]) or 0, tonumber(c[3]) or 0 }
+ end
+
+ local normal = checkedkey(crosssection,"normal","table")
+ if normal then
+ local x, y, z = tonumber(normal[1] or 0), tonumber(normal[2] or 0), tonumber(normal[3] or 0)
+ if sqrt(x*x + y*y + z*z) == 0 then
+ x, y, z = 1, 0, 0
+ end
+ crossdict.O = pdfarray {
+ pdfnull,
+ atan2(-z,sqrt(x*x + y*y))*180/pi,
+ atan2(y,x)*180/pi,
+ }
+ end
+
+ local orient = checkedkey(crosssection,"orient","table")
+ if orient then
+ crossdict.O = pdfarray {
+ tonumber(orient[1]) or 1,
+ tonumber(orient[2]) or 0,
+ tonumber(orient[3]) or 0,
+ }
+ end
+
+ crossdict.IV = cross.intersection or false
+ crossdict.ST = cross.transparent or false
+
+ viewdict.SA = next(crossdict) and pdfarray { crossdict } -- maybe test if # > 1
+ end
+
+ local nodes = checkedkey(view,"nodes","table")
+ if nodes then
+ local nodelist = pdfarray()
+ for i=1,#nodes do
+ local node = checkedkey(nodes,i,"table")
+ if node then
+ local position = checkedkey(node,"position","table")
+ nodelist[#nodelist+1] = pdfdictionary {
+ Type = pdfconstant("3DNode"),
+ N = node.name or ("node_" .. i), -- pdfunicode ?
+ M = position and #position == 12 and pdfarray(position),
+ V = node.visible or true,
+ O = node.opacity or 0,
+ RM = pdfdictionary {
+ Type = pdfconstant("3DRenderMode"),
+ Subtype = pdfconstant(node.rendermode or "Solid"),
+ },
+ }
+ end
+ end
+ viewdict.NA = nodelist
+ end
+
+ return viewdict
+
+end
+
+local stored_js, stored_3d, stored_pr, streams = { }, { }, { }, { }
+
+local function insert3d(spec) -- width, height, factor, display, controls, label, foundname
+
+ local width, height, factor = spec.width, spec.height, spec.factor or number.dimenfactors.bp
+ local display, controls, label, foundname = spec.display, spec.controls, spec.label, spec.foundname
+
+ local param = (display and parametersets[display]) or { }
+ local streamparam = (controls and parametersets[controls]) or { }
+ local name = "3D Artwork " .. (param.name or label or "Unknown")
+
+ local activationdict = pdfdictionary {
+ TB = pdfboolean(param.toolbar,true),
+ NP = pdfboolean(param.tree,false),
+ }
+
+ local stream = streams[label]
+ if not stream then
+
+ local subtype, subdata = "U3D", io.loaddata(foundname) or ""
+ if find(subdata,"^PRC") then
+ subtype = "PRC"
+ elseif find(subdata,"^U3D") then
+ subtype = "U3D"
+ elseif file.suffix(foundname) == "prc" then
+ subtype = "PRC"
+ end
+
+ local attr = pdfdictionary {
+ Type = pdfconstant("3D"),
+ Subtype = pdfconstant(subtype),
+ }
+ local streamviews = checkedkey(streamparam, "views", "table")
+ if streamviews then
+ local list = pdfarray()
+ for i=1,#streamviews do
+ local v = checkedkey(streamviews, i, "table")
+ if v then
+ list[#list+1] = make3dview(v)
+ end
+ end
+ attr.VA = list
+ end
+ if checkedkey(streamparam, "view", "table") then
+ attr.DV = make3dview(streamparam.view)
+ elseif checkedkey(streamparam, "view", "string") then
+ attr.DV = streamparam.view
+ end
+ local js = checkedkey(streamparam, "js", "string")
+ if js then
+ local jsref = stored_js[js]
+ if not jsref then
+ jsref = pdfflushstreamfileobject(js)
+ stored_js[js] = jsref
+ end
+ attr.OnInstantiate = pdfreference(jsref)
+ end
+ stored_3d[label] = pdfflushstreamfileobject(foundname,attr)
+ stream = 1
+ else
+ stream = stream + 1
+ end
+ streams[label] = stream
+
+ local name = pdfunicode(name)
+
+ local annot = pdfdictionary {
+ Subtype = pdfconstant("3D"),
+ T = name,
+ Contents = name,
+ NM = name,
+ ["3DD"] = pdfreference(stored_3d[label]),
+ ["3DA"] = activationdict,
+ }
+ if checkedkey(param,"view","table") then
+ annot["3DV"] = make3dview(param.view)
+ elseif checkedkey(param,"view","string") then
+ annot["3DV"] = param.view
+ end
+
+ local preview = checkedkey(param,"preview","string")
+ if preview then
+ activationdict.A = pdfconstant("XA")
+ local tag = format("%s:%s:%s",label,stream,preview)
+ local ref = stored_pr[tag]
+ if not ref then
+ local figure = img.immediatewrite {
+ filename = preview,
+ width = width,
+ height = height
+ }
+ ref = figure.objnum
+ stored_pr[tag] = ref
+ end
+ if ref then -- see back-pdf ** .. here we have a local /IM !
+ local zero, one = pdfnumber(0), pdfnumber(1) -- not really needed
+ local pw = pdfdictionary {
+ Type = pdfconstant("XObject"),
+ Subtype = pdfconstant("Form"),
+ FormType = one,
+ BBox = pdfarray { zero, zero, pdfnumber(factor*width), pdfnumber(factor*height) },
+ Matrix = pdfarray { one, zero, zero, one, zero, zero },
+ Resources = pdfdictionary {
+ XObject = pdfdictionary {
+ IM = pdfreference(ref)
+ }
+ },
+ ExtGState = pdfdictionary {
+ GS = pdfdictionary {
+ Type = pdfconstant("ExtGState"),
+ CA = one,
+ ca = one,
+ }
+ },
+ ProcSet = pdfarray { pdfconstant("PDF"), pdfconstant("ImageC") },
+ }
+ local pwd = pdfflushstreamobject(format("q /GS gs %f 0 0 %f 0 0 cm /IM Do Q",factor*width,factor*height),pw)
+ annot.AP = pdfdictionary {
+ N = pdfreference(pwd)
+ }
+ end
+ return annot, figure, ref
+ else
+ activationdict.A = pdfconstant("PV")
+ return annot, nil, nil
+ end
+end
+
+function nodeinjections.insertu3d(spec)
+ local annotation, preview, ref = insert3d { -- just spec
+ foundname = spec.foundname,
+ width = spec.width,
+ height = spec.height,
+ factor = spec.factor,
+ display = spec.display,
+ controls = spec.controls,
+ label = spec.label,
+ }
+ node.write(pdfannotation_node(spec.width,spec.height,0,annotation()))
+end
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