Rectification des fichiers et de la version pour le CTAN

[delaunay.git] / luamesh-tex.lua

diff --git a/luamesh-tex.lua b/luamesh-tex.lua
index f3c06ab..11e31a4 100644 (file)
--- a/luamesh-tex.lua
+++ b/luamesh-tex.lua
@@ -140,9 +140,9 @@ end
 
 -- buildVoronoi with MP
 function buildVoronoiMPBW(chaine,mode,points,bbox,scale,tri,styleD,styleV)
-   listPoints = buildList(chaine, mode)
-   triangulation = BowyerWatson(listPoints,bbox)
-   listVoronoi = buildVoronoi(listPoints, triangulation)
+   local listPoints = buildList(chaine, mode)
+   local triangulation = BowyerWatson(listPoints,bbox)
+   local listVoronoi = buildVoronoi(listPoints, triangulation)
    output = traceVoronoiMP(listPoints,triangulation,listVoronoi,points,tri,styleD,styleV)
    output = "\\leavevmode\\begin{mplibcode}beginfig(0);u:="..scale.. ";" .. output .."endfig;\\end{mplibcode}"
    tex.sprint(output)
@@ -151,9 +151,9 @@ end
 
 -- buildVoronoi with TikZ
 function buildVoronoiTikZBW(chaine,mode,points,bbox,scale,tri,color,colorBbox,colorVoronoi,styleD,styleV)
-   listPoints = buildList(chaine, mode)
-   triangulation = BowyerWatson(listPoints,bbox)
-   listVoronoi = buildVoronoi(listPoints, triangulation)
+   local listPoints = buildList(chaine, mode)
+   local triangulation = BowyerWatson(listPoints,bbox)
+   local listVoronoi = buildVoronoi(listPoints, triangulation)
    output = traceVoronoiTikZ(listPoints,triangulation,listVoronoi,points,tri,color,colorBbox,colorVoronoi,styleD,styleV)
    output = "\\noindent\\begin{tikzpicture}[x=" .. scale .. ",y=" .. scale .."]" .. output .."\\end{tikzpicture}"   tex.sprint(output)
 end
@@ -161,9 +161,9 @@ end
 
 -- buildVoronoi with MP
 function buildVoronoiMPBWinc(chaine,beginning, ending,mode,points,bbox,scale,tri,styleD,styleV)
-   listPoints = buildList(chaine, mode)
-   triangulation = BowyerWatson(listPoints,bbox)
-   listVoronoi = buildVoronoi(listPoints, triangulation)
+   local listPoints = buildList(chaine, mode)
+   local triangulation = BowyerWatson(listPoints,bbox)
+   local listVoronoi = buildVoronoi(listPoints, triangulation)
    output = traceVoronoiMP(listPoints,triangulation,listVoronoi,points,tri,styleD,styleV)
    output = "\\leavevmode\\begin{mplibcode}u:="..scale..";"..beginning .. output .. ending .. "\\end{mplibcode}"
    tex.sprint(output)
@@ -172,9 +172,9 @@ end
 
 -- buildVoronoi with TikZ
 function buildVoronoiTikZBWinc(chaine,beginning, ending,mode,points,bbox,scale,tri,color,colorBbox,colorVoronoi)
-   listPoints = buildList(chaine, mode,styleD,styleV)
-   triangulation = BowyerWatson(listPoints,bbox)
-   listVoronoi = buildVoronoi(listPoints, triangulation)
+   local listPoints = buildList(chaine, mode,styleD,styleV)
+   local triangulation = BowyerWatson(listPoints,bbox)
+   local listVoronoi = buildVoronoi(listPoints, triangulation)
    output = traceVoronoiTikZ(listPoints,triangulation,listVoronoi,points,tri,color,colorBbox,colorVoronoi,styleD,styleV)
    output = "\\noindent\\begin{tikzpicture}[x=" .. scale .. ",y=" .. scale .."]" ..beginning.. output..ending .."\\end{tikzpicture}"
    tex.sprint(output)
@@ -209,6 +209,17 @@ function traceMeshTikZ(listPoints, triangulation,points,color,colorBbox)
          end
       end
    end
+   if(points=="dotpoints") then
+      j=1
+      for i=1,#listPoints do
+         if(listPoints[i].type == "bbox") then
+            output = output .. "\\draw[color="..colorBbox.."] (" .. listPoints[i].x ..",".. listPoints[i].y .. ") node {$\\bullet$};"
+            j=j+1
+         else
+            output = output .. "\\draw[color="..color.."] (" .. listPoints[i].x ..",".. listPoints[i].y .. ") node {$\\bullet$};"
+         end
+      end
+   end
    return output
 end
 
@@ -241,14 +252,25 @@ function traceMeshMP(listPoints, triangulation,points)
          end
       end
    end
+   if(points=="dotpoints") then
+      j=1
+      for i=1,#listPoints do
+         if(listPoints[i].type == "bbox") then
+            output = output .. "drawdot (" .. listPoints[i].x ..",".. listPoints[i].y .. ")*u withcolor \\luameshmpcolorBbox withpen pencircle scaled 3;"
+            j=j+1
+         else
+            output = output .. "drawdot (" .. listPoints[i].x ..",".. listPoints[i].y .. ")*u withcolor \\luameshmpcolor withpen pencircle scaled 3;"
+         end
+      end
+   end
    return output
 end
 
 
 -- buildMesh with MP
 function buildMeshMPBW(chaine,mode,points,bbox,scale)
-   listPoints = buildList(chaine, mode)
-   triangulation = BowyerWatson(listPoints,bbox)
+   local listPoints = buildList(chaine, mode)
+   local triangulation = BowyerWatson(listPoints,bbox)
    output = traceMeshMP(listPoints, triangulation,points)
    output = "\\leavevmode\\begin{mplibcode}beginfig(0);u:="..scale.. ";" .. output .."endfig;\\end{mplibcode}"
    tex.sprint(output)
@@ -256,8 +278,8 @@ end
 
 -- buildMesh with MP include code
 function buildMeshMPBWinc(chaine,beginning, ending,mode,points,bbox,scale)
-   listPoints = buildList(chaine, mode)
-   triangulation = BowyerWatson(listPoints,bbox)
+   local listPoints = buildList(chaine, mode)
+   local triangulation = BowyerWatson(listPoints,bbox)
    output = traceMeshMP(listPoints, triangulation,points)
    output = "\\leavevmode\\begin{mplibcode}u:="..scale..";"..beginning .. output .. ending .. "\\end{mplibcode}"
    tex.sprint(output)
@@ -265,8 +287,8 @@ end
 
 -- buildMesh with TikZ
 function buildMeshTikZBW(chaine,mode,points,bbox,scale,color,colorBbox)
-   listPoints = buildList(chaine, mode)
-   triangulation = BowyerWatson(listPoints,bbox)
+   local listPoints = buildList(chaine, mode)
+   local triangulation = BowyerWatson(listPoints,bbox)
    output = traceMeshTikZ(listPoints, triangulation,points,color,colorBbox)
    output = "\\noindent\\begin{tikzpicture}[x=" .. scale .. ",y=" .. scale .."]" .. output .."\\end{tikzpicture}"
    tex.sprint(output)
@@ -274,8 +296,8 @@ end
 
 -- buildMesh with TikZ
 function buildMeshTikZBWinc(chaine,beginning, ending,mode,points,bbox,scale,color,colorBbox)
-   listPoints = buildList(chaine, mode)
-   triangulation = BowyerWatson(listPoints,bbox)
+   local listPoints = buildList(chaine, mode)
+   local triangulation = BowyerWatson(listPoints,bbox)
    output = traceMeshTikZ(listPoints, triangulation,points,color,colorBbox)
    output = "\\noindent\\begin{tikzpicture}[x=" .. scale .. ",y=" .. scale .."]" ..beginning.. output..ending .."\\end{tikzpicture}"
    tex.sprint(output)
@@ -341,7 +363,7 @@ end
 
 -- print points to mesh
 function printPointsMP(chaine,mode,points,bbox,scale)
-   listPoints = buildList(chaine, mode)
+   local listPoints = buildList(chaine, mode)
    if(bbox == "bbox" ) then
       listPoints = buildBoundingBox(listPoints)
    end
@@ -353,7 +375,7 @@ end
 
 -- print points to mesh
 function printPointsMPinc(chaine,beginning, ending, mode,points,bbox,scale)
-   listPoints = buildList(chaine, mode)
+   local listPoints = buildList(chaine, mode)
    if(bbox == "bbox" ) then
       listPoints = buildBoundingBox(listPoints)
    end
@@ -364,7 +386,7 @@ end
 
 -- print points to mesh
 function printPointsTikZ(chaine,mode,points,bbox,scale,color,colorBbox)
-   listPoints = buildList(chaine, mode)
+   local listPoints = buildList(chaine, mode)
    if(bbox == "bbox" ) then
       listPoints = buildBoundingBox(listPoints)
    end
@@ -376,7 +398,7 @@ end
 
 -- print points to mesh
 function printPointsTikZinc(chaine,beginning, ending, mode,points,bbox,scale,color,colorBbox)
-   listPoints = buildList(chaine, mode)
+   local listPoints = buildList(chaine, mode)
    if(bbox == "bbox" ) then
       listPoints = buildBoundingBox(listPoints)
    end
@@ -388,8 +410,8 @@ end
 
 -- buildMesh
 function buildRect(largeur,a,b,nbrA, nbrB)
-   listPoints = rectangleList(a,b,nbrA,nbrB)
-   triangulation = BowyerWatson(listPoints,"none")
+   local listPoints = rectangleList(a,b,nbrA,nbrB)
+   local triangulation = BowyerWatson(listPoints,"none")
    traceTikZ(listPoints, triangulation,largeur,"none")
 end
 
@@ -398,8 +420,8 @@ end
 function TeXaddOnePointTikZ(listPoints,P,step,bbox,color,colorBack, colorNew, colorCircle,colorBbox)
    output = ""
    -- build the triangulation
-   triangulation = BowyerWatson(listPoints,bbox)
-   badTriangles = buildBadTriangles(P,triangulation)
+   local triangulation = BowyerWatson(listPoints,bbox)
+   local badTriangles = buildBadTriangles(P,triangulation,listPoints)
    for i=1,#listPoints do
       output = output .. "\\coordinate (MeshPoints".. i .. ") at  (" .. listPoints[i].x .. "," .. listPoints[i].y .. ");"
    end
@@ -530,8 +552,10 @@ function TeXaddOnePointMPBW(listPoints,P,step,bbox)
    output = "";
    output = output .. "pair MeshPoints[];"
    -- build the triangulation
+   local triangulation = {}
+   local badTriangles = {}
    triangulation = BowyerWatson(listPoints,bbox)
-   badTriangles = buildBadTriangles(P,triangulation)
+   badTriangles = buildBadTriangles(P,triangulation,listPoints)
    for i=1,#listPoints do
       output = output .. "MeshPoints[".. i .. "] = (" .. listPoints[i].x .. "," .. listPoints[i].y .. ")*u;"
    end
@@ -662,6 +686,7 @@ end
 
 
 function TeXOnePointTikZBW(chaine,point,step,scale,mode,bbox,color,colorBack,colorNew,colorCircle,colorBbox)
+   local listPoints = {}
    if(mode=="int") then
       Sx,Sy=string.match(point,"%((.+),(.+)%)")
       P = {x=Sx, y=Sy}
@@ -676,6 +701,7 @@ function TeXOnePointTikZBW(chaine,point,step,scale,mode,bbox,color,colorBack,col
 end
 
 function TeXOnePointTikZBWinc(chaine,point,beginning, ending,step,scale,mode,bbox,color,colorBack,colorNew,colorCircle,colorBbox)
+   local listPoints = {}
    if(mode=="int") then
       Sx,Sy=string.match(point,"%((.+),(.+)%)")
       P = {x=Sx, y=Sy}
@@ -690,6 +716,7 @@ function TeXOnePointTikZBWinc(chaine,point,beginning, ending,step,scale,mode,bbo
 end
 
 function TeXOnePointMPBW(chaine,point,step,scale,mode,bbox)
+   local listPoints = {}
    if(mode=="int") then
       Sx,Sy=string.match(point,"%((.+),(.+)%)")
       P = {x=Sx, y=Sy}
@@ -704,6 +731,7 @@ function TeXOnePointMPBW(chaine,point,step,scale,mode,bbox)
 end
 
 function TeXOnePointMPBWinc(chaine,point,beginning,ending,step,scale,mode,bbox)
+   local listPoints = {}
    if(mode=="int") then
       Sx,Sy=string.match(point,"%((.+),(.+)%)")
       P = {x=Sx, y=Sy}
@@ -719,14 +747,14 @@ end
 
 
 function drawGmshMP(file,points,scale)
-   listPoints,triangulation = readGmsh(file)
+   local listPoints,triangulation = readGmsh(file)
    output = traceMeshMP(listPoints,triangulation,points)
    output = "\\leavevmode\\begin{mplibcode}beginfig(0);u:="..scale.. ";" .. output .."endfig;\\end{mplibcode}"
    tex.sprint(output)
 end
 
 function drawGmshMPinc(file,beginning,ending,points,scale)
-   listPoints,triangulation = readGmsh(file)
+   local listPoints,triangulation = readGmsh(file)
    output = traceMeshMP(listPoints,triangulation,points)
    output = "\\leavevmode\\begin{mplibcode}u:="..scale..";"..beginning .. output .. ending .. "\\end{mplibcode}"
    tex.sprint(output)
@@ -736,7 +764,7 @@ end
 
 --
 function drawGmshTikZ(file,points,scale,color)
-   listPoints,triangulation = readGmsh(file)
+   local listPoints,triangulation = readGmsh(file)
    output = traceMeshTikZ(listPoints, triangulation,points,color,colorBbox)
    output = "\\noindent\\begin{tikzpicture}[x=" .. scale .. ",y=" .. scale .."]" .. output .."\\end{tikzpicture}"
    tex.sprint(output)
@@ -744,7 +772,7 @@ end
 
 --
 function drawGmshTikZinc(file,beginning, ending,points,scale,color)
-   listPoints,triangulation = readGmsh(file)
+   local listPoints,triangulation = readGmsh(file)
    output = traceMeshTikZ(listPoints, triangulation,points,color,colorBbox)
    output = "\\noindent\\begin{tikzpicture}[x=" .. scale .. ",y=" .. scale .."]" ..beginning.. output..ending .."\\end{tikzpicture}"
    tex.sprint(output)
@@ -753,8 +781,8 @@ end
 
 -- buildVoronoi with MP
 function gmshVoronoiMP(file,points,scale,tri,styleD,styleV)
-   listPoints,triangulation = readGmsh(file)
-   listVoronoi = buildVoronoi(listPoints, triangulation)
+   local listPoints,triangulation = readGmsh(file)
+   local listVoronoi = buildVoronoi(listPoints, triangulation)
    output = traceVoronoiMP(listPoints,triangulation,listVoronoi,points,tri,styleD,styleV)
    output = "\\leavevmode\\begin{mplibcode}beginfig(0);u:="..scale.. ";" .. output .."endfig;\\end{mplibcode}"
    tex.sprint(output)
@@ -763,8 +791,8 @@ end
 
 -- buildVoronoi with TikZ
 function gmshVoronoiTikZ(file,points,scale,tri,color,colorVoronoi,styleD,styleV)
-   listPoints,triangulation = readGmsh(file)
-   listVoronoi = buildVoronoi(listPoints, triangulation)
+   local listPoints,triangulation = readGmsh(file)
+   local listVoronoi = buildVoronoi(listPoints, triangulation)
    output = traceVoronoiTikZ(listPoints,triangulation,listVoronoi,points,tri,color,colorBbox,colorVoronoi,styleD,styleV)
    output = "\\noindent\\begin{tikzpicture}[x=" .. scale .. ",y=" .. scale .."]" .. output .."\\end{tikzpicture}"   tex.sprint(output)
 end
@@ -772,8 +800,8 @@ end
 
 -- buildVoronoi with MP
 function gmshVoronoiMPinc(file,beginning, ending,points,scale,tri,styleD,styleV)
-   listPoints,triangulation = readGmsh(file)
-   listVoronoi = buildVoronoi(listPoints, triangulation)
+   local listPoints,triangulation = readGmsh(file)
+   local listVoronoi = buildVoronoi(listPoints, triangulation)
    output = traceVoronoiMP(listPoints,triangulation,listVoronoi,points,tri,styleD,styleV)
    output = "\\leavevmode\\begin{mplibcode}u:="..scale..";"..beginning .. output .. ending .. "\\end{mplibcode}"
    tex.sprint(output)
@@ -782,9 +810,189 @@ end
 
 -- buildVoronoi with TikZ
 function gmshVoronoiTikZinc(file,beginning, ending,points,scale,tri,color,colorVoronoi,styleD,styleV)
-   listPoints,triangulation = readGmsh(file)
-   listVoronoi = buildVoronoi(listPoints, triangulation)
+   local listPoints,triangulation = readGmsh(file)
+   local listVoronoi = buildVoronoi(listPoints, triangulation)
    output = traceVoronoiTikZ(listPoints,triangulation,listVoronoi,points,tri,color,colorBbox,colorVoronoi,styleD,styleV)
    output = "\\noindent\\begin{tikzpicture}[x=" .. scale .. ",y=" .. scale .."]" ..beginning.. output..ending .."\\end{tikzpicture}"
    tex.sprint(output)
 end
+
+
+--------------------------------------------------
+--         Meshing of a polygon                 --
+--------------------------------------------------
+
+function  tracePolygonMP(polygon,points)
+   output = "";
+   output = output .. "pair polygon[];"
+   for i=1,#polygon do
+      output = output .. "polygon[".. i .. "] = (" .. polygon[i].x .. "," .. polygon[i].y .. ")*u;"
+   end
+   output = output .. "draw "
+   for i=1,#polygon do
+      output = output .. "(" .. polygon[i].x .. "," .. polygon[i].y .. ")*u -- "
+   end
+   output = output .. "cycle withcolor \\luameshmpcolorPoly withpen pencircle scaled 1pt;"
+   if(points=="points") then
+      for i=1,#polygon do
+         output = output .. "dotlabel.llft (btex $\\MeshPoint_{" .. i .. "}$ etex, (" .. polygon[i].x ..",".. polygon[i].y .. ")*u ) withcolor \\luameshmpcolorPoly ;"
+      end
+   end
+   if(points=="dotpoints") then
+         for i=1,#polygon do
+         output = output .. "drawdot  (" .. polygon[i].x ..",".. polygon[i].y .. ")*u  withcolor \\luameshmpcolorPoly withpen pencircle scaled 3;"
+      end
+   end
+   return output
+end
+
+
+function  tracePolygonTikZ(polygon,points, colorPoly)
+   output = "";
+   for i=1,#polygon do
+      output = output .. "\\coordinate (polygon".. i .. ") at  (" .. polygon[i].x .. "," .. polygon[i].y .. ");"
+   end
+   output = output .. "\\draw[color=".. colorPoly .. ", thick]"
+   for i=1,#polygon do
+      output = output .. "(" .. polygon[i].x .. "," .. polygon[i].y .. ") -- "
+   end
+   output = output .. "cycle;"
+   if(points=="points") then
+      for i=1,#polygon do
+         output = output .. "\\draw[color="..colorPoly.."] (" .. polygon[i].x ..",".. polygon[i].y .. ") node {$\\bullet$} node[anchor=north east] {$\\MeshPoint_{" .. i .. "}$};"
+      end
+   end
+   if(points=="dotpoints") then
+      for i=1,#polygon do
+         output = output .. "\\draw[color="..colorPoly.."] (" .. polygon[i].x ..",".. polygon[i].y .. ") node {$\\bullet$};"
+      end
+   end
+   return output
+end
+
+
+
+function drawMeshPolygonMP(chaine,mode,h,step,
+                             points,scale,random)
+   local polygon = buildList(chaine, mode)
+   polygon = addPointsPolygon(polygon,h)
+   local grid = buildGrid(polygon,h,random)
+   local listPoints = addGridPoints(polygon,grid,h)
+   if(step=="polygon") then
+      -- the polygon
+      output = tracePolygonMP(polygon,points)
+   end
+   if(step=="grid") then
+      -- polygon + grid
+      output = tracePointsMP(grid,points)
+      output = output .. tracePolygonMP(polygon,points)
+   end
+   if(step=="points") then
+      -- polygon + only grid points inside the polygon
+      output = tracePointsMP(listPoints,points)
+      output = output .. tracePolygonMP(polygon,points)
+   end
+   if(step=="mesh") then
+      -- polygon + mesh
+      triangulation = BowyerWatson(listPoints,"none") -- no bbox
+      output = traceMeshMP(listPoints,triangulation,points)
+      output = output .. tracePolygonMP(polygon,points)
+   end
+
+   output = "\\leavevmode\\begin{mplibcode}beginfig(0);u:="..scale.. ";" .. output .."endfig;\\end{mplibcode}"
+   tex.sprint(output)
+end
+
+
+
+function drawMeshPolygonTikZ(chaine,mode,h,step,
+                             points,scale,color,colorPoly,random)
+   local polygon = buildList(chaine, mode)
+   polygon = addPointsPolygon(polygon,h)
+   local grid = buildGrid(polygon,h,random)
+   local listPoints = addGridPoints(polygon,grid,h)
+   if(step=="polygon") then
+      -- the polygon
+      output = tracePolygonTikZ(polygon,points,colorPoly)
+   end
+   if(step=="grid") then
+      -- polygon + grid
+      output = tracePointsTikZ(grid,points,color,"none") -- none for colorBbox
+      output = output .. tracePolygonTikZ(polygon,points,colorPoly)
+   end
+   if(step=="points") then
+      -- polygon + only grid points inside the polygon
+      output = tracePointsTikZ(listPoints,points,color,"none")
+      output = output .. tracePolygonTikZ(polygon,points,colorPoly)
+   end
+   if(step=="mesh") then
+      -- polygon + mesh
+      triangulation = BowyerWatson(listPoints,"none") -- no bbox
+      output = traceMeshTikZ(listPoints,triangulation,points,color,"none")
+      output = output .. tracePolygonTikZ(polygon,points,colorPoly)
+   end
+   output = "\\noindent\\begin{tikzpicture}[x=" .. scale .. ",y=" .. scale .."]" .. output .."\\end{tikzpicture}"
+   tex.sprint(output)
+end
+
+function drawMeshPolygonMPinc(chaine,beginning,ending,mode,h,step,
+                             points,scale,random)
+   local polygon = buildList(chaine, mode)
+   polygon = addPointsPolygon(polygon,h)
+   local grid = buildGrid(polygon,h,random)
+   local listPoints = addGridPoints(polygon,grid,h)
+   if(step=="polygon") then
+      -- the polygon
+      output = tracePolygonMP(polygon,points)
+   end
+   if(step=="grid") then
+      -- polygon + grid
+      output = tracePointsMP(grid,points)
+      output = output .. tracePolygonMP(polygon,points)
+   end
+   if(step=="points") then
+      -- polygon + only grid points inside the polygon
+      output = tracePointsMP(listPoints,points)
+      output = output .. tracePolygonMP(polygon,points)
+   end
+   if(step=="mesh") then
+      -- polygon + mesh
+      triangulation = BowyerWatson(listPoints,"none") -- no bbox
+      output = traceMeshMP(listPoints,triangulation,points)
+      output = output .. tracePolygonMP(polygon,points)
+   end
+   output = "\\begin{mplibcode}u:="..scale..";"..beginning .. output .. ending .. "\\end{mplibcode}"
+   tex.sprint(output)
+end
+
+
+
+function drawMeshPolygonTikZinc(chaine,beginning,ending,mode,h,step,
+                             points,scale,color,colorPoly,random)
+   local polygon = buildList(chaine, mode)
+   polygon = addPointsPolygon(polygon,h)
+   local grid = buildGrid(polygon,h,random)
+   local listPoints = addGridPoints(polygon,grid,h)
+   if(step=="polygon") then
+      -- the polygon
+      output = tracePolygonTikZ(polygon,points,colorPoly)
+   end
+   if(step=="grid") then
+      -- polygon + grid
+      output = tracePointsTikZ(grid,points,color,"none") -- none for colorBbox
+      output = output .. tracePolygonTikZ(polygon,points,colorPoly)
+   end
+   if(step=="points") then
+      -- polygon + only grid points inside the polygon
+      output = tracePointsTikZ(listPoints,points,color,"none")
+      output = output .. tracePolygonTikZ(polygon,points,colorPoly)
+   end
+   if(step=="mesh") then
+      -- polygon + mesh
+      triangulation = BowyerWatson(listPoints,"none") -- no bbox
+      output = traceMeshTikZ(listPoints,triangulation,points,color,"none")
+      output = output .. tracePolygonTikZ(polygon,points,colorPoly)
+   end
+   output = "\\noindent\\begin{tikzpicture}[x="..scale..",y="..scale.."]".. beginning..output ..ending.. "\\end{tikzpicture}"
+   tex.sprint(output)
+end