1 -- Bowyer and Watson algorithm
3 function BowyerWatson (listPoints,bbox)
4 local triangulation = {}
5 local lgth = #listPoints
6 -- add four points to listPoints to have a bounding box
7 listPoints = buildBoundingBox(listPoints)
9 triangulation[1] = {lgth+1, lgth+2, lgth+3,type="bbox"}
10 -- the second triangle
11 triangulation[2] = {lgth+1, lgth+3, lgth+4,type="bbox"}
12 -- add points one by one
14 -- find the triangles which the circumcircle contained the point to add
15 badTriangles = buildBadTriangles(listPoints[i],triangulation)
16 -- build the polygon of the cavity containing the point to add
17 polygon = buildCavity(badTriangles, triangulation)
18 -- remove the bad triangles
19 for j=1,#badTriangles do
20 table.remove(triangulation,badTriangles[j]-(j-1))
22 -- build the new triangles and add them to triangulation
24 if((polygon[j][1]>lgth) or (polygon[j][2]>lgth) or (i>lgth)) then
25 table.insert(triangulation,{polygon[j][1],polygon[j][2],i,type="bbox"})
27 table.insert(triangulation,{polygon[j][1],polygon[j][2],i,type="in"})
30 end -- end adding points of the listPoints
31 -- remove bounding box
32 if(bbox ~= "bbox") then
33 triangulation = removeBoundingBox(triangulation,lgth)
34 table.remove(listPoints,lgth+1)
35 table.remove(listPoints,lgth+1)
36 table.remove(listPoints,lgth+1)
37 table.remove(listPoints,lgth+1)
43 function buildBoundingBox(listPoints)
44 -- listPoints : list of points
45 -- epsV : parameter for the distance of the bounding box
46 local xmin, xmax, ymin, ymax, eps
51 for i=1,#listPoints do
52 if (listPoints[i].x < xmin) then
53 xmin = listPoints[i].x
55 if (listPoints[i].x > xmax) then
56 xmax = listPoints[i].x
58 if (listPoints[i].y < ymin) then
59 ymin = listPoints[i].y
61 if (listPoints[i].y > ymax) then
62 ymax = listPoints[i].y
65 eps = math.max(math.abs(xmax-xmin),math.abs(ymax-ymin))*0.15
70 -- add points of the bounding box in last positions
71 table.insert(listPoints,{x=xmin,y=ymin,type="bbox"})
72 table.insert(listPoints,{x=xmin,y=ymax,type="bbox"})
73 table.insert(listPoints,{x=xmax,y=ymax,type="bbox"})
74 table.insert(listPoints,{x=xmax,y=ymin,type="bbox"})
78 function removeBoundingBox(triangulation,lgth)
79 -- build the four bounding box edge
86 for i=1,#triangulation do
87 boolE1 = pointInTriangle(point1,triangulation[i])
88 boolE2 = pointInTriangle(point2,triangulation[i])
89 boolE3 = pointInTriangle(point3,triangulation[i])
90 boolE4 = pointInTriangle(point4,triangulation[i])
91 if((not boolE1) and (not boolE2) and (not boolE3) and (not boolE4)) then
92 table.insert(newTriangulation,triangulation[i])
95 return newTriangulation
99 function buildBadTriangles(point, triangulation)
101 for j=1,#triangulation do -- for all triangles
102 A = listPoints[triangulation[j][1]]
103 B = listPoints[triangulation[j][2]]
104 C = listPoints[triangulation[j][3]]
105 center, radius = circoncircle(A,B,C)
106 CP = Vector(center,point)
107 if(VectorNorm(CP)<radius) then -- the point belongs to the circoncirle
108 table.insert(badTriangles,j)
114 -- construction of the cavity composed by the bad triangles around the point to add
115 function buildCavity(badTriangles, triangulation)
117 for j=1,#badTriangles do -- for all bad triangles
118 ind = badTriangles[j]
119 for k=1,3 do -- for all edges
120 edge = {triangulation[ind][k],triangulation[ind][k%3+1]}
122 for l = 1,#badTriangles do -- for all badtriangles
123 badInd = badTriangles[l]
124 if(badInd ~= ind) then -- if not the current one
125 edgeBord = edgeBord or edgeInTriangle(edge,triangulation[badInd])
128 -- if the edge does not belong to another bad triangle
129 if(edgeBord == false) then
130 -- insert the edge to the cavity
131 table.insert(polygon,edge)
138 function edgeInTriangle(e,t)
153 function pointInTriangle(e,t)
165 local out = {x = B.x - A.x, y = B.y - A.y}
169 function VectorNorm(NP)
170 return math.sqrt(NP.x*NP.x +NP.y*NP.y)
174 function circoncircle(M, N, P)
175 -- Compute center and radius of the circoncircle of the triangle M N P
177 -- return : (center [Point],radius [float])
179 local MN = Vector(M,N)
180 local NP = Vector(N,P)
181 local PM = Vector(P,M)
182 m = VectorNorm(NP) -- |NP|
183 n = VectorNorm(PM) -- |PM|
184 p = VectorNorm(MN) -- |MN|
186 d = (m + n + p) * (-m + n + p) * (m - n + p) * (m + n - p)
188 rad = m * n * p / math.sqrt(d)
192 d = -2 * (M.x * NP.y + N.x * PM.y + P.x * MN.y)
197 om2 = math.pow(VectorNorm(OM),2) -- |OM|**2
198 on2 = math.pow(VectorNorm(ON),2) -- |ON|**2
199 op2 = math.pow(VectorNorm(OP),2) -- |OP|**2
200 x0 = -(om2 * NP.y + on2 * PM.y + op2 * MN.y) / d
201 y0 = (om2 * NP.x + on2 * PM.x + op2 * MN.x) / d
207 return Out, rad -- (center [Point], R [float])
211 -------------------------- TeX
212 -- build the list of points
213 function buildList(chaine, mode)
214 -- if mode = int : the list is given in the chaine string (x1,y1);(x2,y2);...;(xn,yn)
215 -- if mode = ext : the list is given in a file line by line with space separation
217 if mode == "int" then
218 local points = string.explode(chaine, ";")
221 Sx,Sy=string.match(points[i],"%((.+),(.+)%)")
222 listPoints[i]={x=tonumber(Sx),y=tonumber(Sy)}
224 elseif mode == "ext" then
225 io.input(chaine) -- open the file
227 lines=string.explode(text,"\n+") -- all the lines
230 xy=string.explode(lines[i]," +")
231 listPoints[i]={x=tonumber(xy[1]),y=tonumber(xy[2])}
234 print("Non existing mode")
241 function rectangleList(a,b,nbrA,nbrB)
248 listPoints[k] = {x = (i-1)*stepA, y=(j-1)*stepB}
255 -- trace a triangulation with TikZ
256 function traceMeshTikZ(listPoints, triangulation,points,color)
258 for i=1,#triangulation do
259 PointI = listPoints[triangulation[i][1]]
260 PointJ = listPoints[triangulation[i][2]]
261 PointK = listPoints[triangulation[i][3]]
262 output = output .. "\\draw[color="..color.."] (".. PointI.x ..",".. PointI.y ..")--("..PointJ.x..",".. PointJ.y ..")--("..PointK.x..",".. PointK.y ..")--cycle;"
264 if(points=="points") then
265 for i=1,#listPoints do
266 output = output .. "\\draw[color=".."] (" .. listPoints[i].x ..",".. listPoints[i].y .. ") node {$\\bullet$} node[anchor=north east] {$\\MeshPoint_{" .. i .. "}$};"
273 -- trace a triangulation with MP
274 function traceMeshMP(listPoints, triangulation,points)
276 output = output .. " pair MeshPoints[];"
277 for i=1,#listPoints do
278 output = output .. "MeshPoints[".. i .. "] = (" .. listPoints[i].x .. "," .. listPoints[i].y .. ");"
281 for i=1,#triangulation do
282 PointI = listPoints[triangulation[i][1]]
283 PointJ = listPoints[triangulation[i][2]]
284 PointK = listPoints[triangulation[i][3]]
285 if(triangulation[i].type == "bbox") then
286 output = output .. "draw (".. PointI.x ..",".. PointI.y ..")*u--("..PointJ.x..",".. PointJ.y ..")*u--("..PointK.x..",".. PointK.y ..")*u--cycle withcolor \\luameshmpcolorBbox;"
288 output = output .. "draw (".. PointI.x ..",".. PointI.y ..")*u--("..PointJ.x..",".. PointJ.y ..")*u--("..PointK.x..",".. PointK.y ..")*u--cycle withcolor \\luameshmpcolor;"
291 if(points=="points") then
292 for i=1,#listPoints do
293 if(listPoints[i].type == "bbox") then
294 output = output .. "dotlabel.llft (btex $\\MeshPoint_{" .. i .. "}$ etex, (" .. listPoints[i].x ..",".. listPoints[i].y .. ")*u ) withcolor \\luameshmpcolorBbox ;"
296 output = output .. "dotlabel.llft (btex $\\MeshPoint_{" .. i .. "}$ etex, (" .. listPoints[i].x ..",".. listPoints[i].y .. ")*u ) withcolor \\luameshmpcolor ;"
305 -- buildMesh with TikZ
306 function buildMeshTikZ(chaine,mode,points,bbox,full,scale,color)
307 listPoints = buildList(chaine, mode)
308 triangulation = BowyerWatson(listPoints,bbox)
309 output = traceMeshTikZ(listPoints, triangulation,points,color)
310 if(full=="full") then
311 output = "\\noindent\\begin{tikzpicture}[x=" .. scale .. ",y=" .. scale .."]" .. output .."\\end{tikzpicture}"
318 function buildMeshMPBW(chaine,mode,points,bbox,scale)
319 listPoints = buildList(chaine, mode)
320 triangulation = BowyerWatson(listPoints,bbox)
321 output = traceMeshMP(listPoints, triangulation,points)
322 output = "\\leavevmode\\begin{mplibcode}beginfig(0);u:="..scale.. ";" .. output .."endfig;\\end{mplibcode}"
327 -- buildMesh with MP include code
328 function buildMeshMPBWinc(chaine,beginning, ending,mode,points,bbox,scale)
329 listPoints = buildList(chaine, mode)
330 triangulation = BowyerWatson(listPoints,bbox)
331 output = traceMeshMP(listPoints, triangulation,points)
332 output = "\\begin{mplibcode}u:="..scale..";"..beginning .. output .. ending .. "\\end{mplibcode}"
337 function buildRect(largeur,a,b,nbrA, nbrB)
338 listPoints = rectangleList(a,b,nbrA,nbrB)
339 triangulation = BowyerWatson(listPoints,"none")
340 traceTikZ(listPoints, triangulation,largeur,"none")
344 -- function give a real polygon without repeting points
345 function cleanPoly(polygon)
349 table.insert(polyNew, e1)
350 table.insert(polyNew, e2)
353 bool1 = (polygon[i][1] == polyNew[j])
354 bool2 = (polygon[i][2] == polyNew[j])
355 if(bool1 or bool2) then -- the edge has a common point with polyNew[j]
357 table.insert(polyNew, polygon[i][1])
359 elseif(not bool2) then
360 table.insert(polyNew, polygon[i][2])
369 function TeXaddOnePointTikZ(chaine,point,step,color,colorBack, colorNew, colorCircle)
370 Sx,Sy=string.match(point,"%((.+),(.+)%)")
373 listPoints = buildList(chaine, "int")
374 -- build the triangulation
375 triangulation = BowyerWatson(listPoints,"none")
376 badTriangles = buildBadTriangles(P,triangulation)
377 if(step == "badT") then
379 for i=1,#triangulation do
380 PointI = listPoints[triangulation[i][1]]
381 PointJ = listPoints[triangulation[i][2]]
382 PointK = listPoints[triangulation[i][3]]
383 output = output .. "\\draw[color="..color.."] (".. PointI.x ..",".. PointI.y ..")--("..PointJ.x..",".. PointJ.y ..")--("..PointK.x..",".. PointK.y ..")--cycle;"
385 -- draw and fill the bad triangle
386 for i=1,#badTriangles do
387 PointI = listPoints[triangulation[badTriangles[i]][1]]
388 PointJ = listPoints[triangulation[badTriangles[i]][2]]
389 PointK = listPoints[triangulation[badTriangles[i]][3]]
390 output = output .. "\\draw[fill="..colorBack.."] (".. PointI.x ..",".. PointI.y ..")--("..PointJ.x..",".. PointJ.y ..")--("..PointK.x..",".. PointK.y ..")--cycle;"
392 -- draw the circoncircle
393 for i=1,#badTriangles do
394 PointI = listPoints[triangulation[badTriangles[i]][1]]
395 PointJ = listPoints[triangulation[badTriangles[i]][2]]
396 PointK = listPoints[triangulation[badTriangles[i]][3]]
397 center, radius = circoncircle(PointI, PointJ, PointK)
398 output = output .. "\\draw[dashed, color="..colorCircle.."] ("..center.x .. "," .. center.y .. ") circle ("..radius ..");"
401 for i=1,#listPoints do
402 output = output .. "\\draw[color ="..color.."] (" .. listPoints[i].x ..",".. listPoints[i].y .. ") node {$\\bullet$} node[anchor=north east] {$\\MeshPoint_{" .. i .. "}$};"
404 -- mark the point to add
405 output = output .. "\\draw[color="..colorNew.."] (" .. P.x ..",".. P.y .. ") node {$\\bullet$} node[anchor=north east] {$\\NewPoint$};"
406 elseif(step == "cavity") then
407 polygon = buildCavity(badTriangles, triangulation)
408 polyNew = cleanPoly(polygon)
409 -- remove the bad triangles
410 for j=1,#badTriangles do
411 table.remove(triangulation,badTriangles[j]-(j-1))
413 -- draw the triangles
414 for i=1,#triangulation do
415 PointI = listPoints[triangulation[i][1]]
416 PointJ = listPoints[triangulation[i][2]]
417 PointK = listPoints[triangulation[i][3]]
418 output = output .. "\\draw[color="..color.."] (".. PointI.x ..",".. PointI.y ..")--("..PointJ.x..",".. PointJ.y ..")--("..PointK.x..",".. PointK.y ..")--cycle;"
420 -- fill and draw the cavity
423 PointI = listPoints[polyNew[i]]
424 path = path .. "(".. PointI.x ..",".. PointI.y ..")--"
426 output = output .. "\\draw[color="..colorNew..",fill ="..colorBack..", thick] " .. path .. "cycle;"
427 -- mark the points of the mesh
428 for i=1,#listPoints do
429 output = output .. "\\draw[color="..color.."] (" .. listPoints[i].x ..",".. listPoints[i].y .. ") node {$\\bullet$} node[anchor=north east] {$\\MeshPoint_{" .. i .. "}$};"
431 -- mark the adding point
432 output = output .. "\\draw[color="..colorNew.."] (" .. P.x ..",".. P.y .. ") node {$\\bullet$} node[anchor=north east] {$\\NewPoint$};"
433 elseif(step == "newT") then
434 polygon = buildCavity(badTriangles, triangulation)
435 polyNew = cleanPoly(polygon)
436 -- remove the bad triangles
437 for j=1,#badTriangles do
438 table.remove(triangulation,badTriangles[j]-(j-1))
440 -- draw the triangle of the triangulation
441 for i=1,#triangulation do
442 PointI = listPoints[triangulation[i][1]]
443 PointJ = listPoints[triangulation[i][2]]
444 PointK = listPoints[triangulation[i][3]]
445 output = output .. "\\draw[color ="..color.."] (".. PointI.x ..",".. PointI.y ..")--("..PointJ.x..",".. PointJ.y ..")--("..PointK.x..",".. PointK.y ..")--cycle;"
447 -- fill and draw the cavity
450 PointI = listPoints[polyNew[i]]
451 path = path .. "(".. PointI.x ..",".. PointI.y ..")--"
453 output = output .. "\\draw[color="..colorNew..",fill ="..colorBack..", thick] " .. path .. "cycle;"
454 -- draw the new triangles composed by the edges of the polygon and the added point
456 output = output .. "\\draw[color=TeXCluaMeshNewTikZ, thick]".."(".. listPoints[polygon[i][1]].x .. "," .. listPoints[polygon[i][1]].y .. ") -- (" .. listPoints[polygon[i][2]].x .. "," .. listPoints[polygon[i][2]].y ..");"
457 output = output .. "\\draw[color="..colorNew..", thick]".."(".. listPoints[polygon[i][1]].x .. "," .. listPoints[polygon[i][1]].y .. ") -- (" .. P.x .. "," .. P.y ..");"
458 output = output .. "\\draw[color="..colorNew..", thick]".."(".. listPoints[polygon[i][2]].x .. "," .. listPoints[polygon[i][2]].y .. ") -- (" .. P.x .. "," .. P.y ..");"
461 for i=1,#listPoints do
462 output = output .. "\\draw[color="..color.."] (" .. listPoints[i].x ..",".. listPoints[i].y .. ") node {$\\bullet$} node[anchor=north east] {$\\MeshPoint_{" .. i .. "}$};"
464 -- mark the added point
465 output = output .. "\\draw[color="..colorNew.."] (" .. P.x ..",".. P.y .. ") node {$\\bullet$} node[anchor=north east] {$\\NewPoint$};"
470 function TeXaddOnePointMPBW(listPoints,P,step,bbox)
473 output = output .. "pair MeshPoints[];"
474 -- build the triangulation
475 triangulation = BowyerWatson(listPoints,bbox)
476 badTriangles = buildBadTriangles(P,triangulation)
477 for i=1,#listPoints do
478 output = output .. "MeshPoints[".. i .. "] = (" .. listPoints[i].x .. "," .. listPoints[i].y .. ");"
480 if(step == "badT") then
482 for i=1,#triangulation do
483 PointI = listPoints[triangulation[i][1]]
484 PointJ = listPoints[triangulation[i][2]]
485 PointK = listPoints[triangulation[i][3]]
486 if(triangulation[i].type == "bbox") then
487 output = output .. "draw (".. PointI.x ..",".. PointI.y ..")*u--("..PointJ.x..",".. PointJ.y ..")*u--("..PointK.x..",".. PointK.y ..")*u--cycle withcolor \\luameshmpcolorBbox;"
489 output = output .. "draw (".. PointI.x ..",".. PointI.y ..")*u--("..PointJ.x..",".. PointJ.y ..")*u--("..PointK.x..",".. PointK.y ..")*u--cycle withcolor \\luameshmpcolor;"
492 -- draw and fill the bad triangle
493 for i=1,#badTriangles do
494 PointI = listPoints[triangulation[badTriangles[i]][1]]
495 PointJ = listPoints[triangulation[badTriangles[i]][2]]
496 PointK = listPoints[triangulation[badTriangles[i]][3]]
497 output = output .. "draw (".. PointI.x ..",".. PointI.y ..")*u--("..PointJ.x..",".. PointJ.y ..")*u--("..PointK.x..",".. PointK.y ..")*u--cycle withcolor \\luameshmpcolor;"
498 output = output .. "fill (".. PointI.x ..",".. PointI.y ..")*u--("..PointJ.x..",".. PointJ.y ..")*u--("..PointK.x..",".. PointK.y ..")*u--cycle withcolor \\luameshmpcolorBack;"
500 -- draw the circoncircle
501 for i=1,#badTriangles do
502 PointI = listPoints[triangulation[badTriangles[i]][1]]
503 PointJ = listPoints[triangulation[badTriangles[i]][2]]
504 PointK = listPoints[triangulation[badTriangles[i]][3]]
505 center, radius = circoncircle(PointI, PointJ, PointK)
506 output = output .. "draw fullcircle scaled ("..radius .."*2u) shifted ("..center.x .. "*u," .. center.y .. "*u) dashed evenly withcolor \\luameshmpcolorCircle;"
509 for i=1,#listPoints do
510 if(listPoints[i].type == "bbox") then
511 output = output .. "dotlabel.llft (btex $\\MeshPoint_{" .. i .. "}$ etex, (" .. listPoints[i].x ..",".. listPoints[i].y .. ")*u ) withcolor \\luameshmpcolorBbox ;"
513 output = output .. "dotlabel.llft (btex $\\MeshPoint_{" .. i .. "}$ etex, (" .. listPoints[i].x ..",".. listPoints[i].y .. ")*u ) withcolor \\luameshmpcolor ;"
516 -- mark the point to add
517 output = output .. "dotlabel.llft (btex $\\NewPoint$ etex,(" .. P.x ..",".. P.y .. ")*u) withcolor \\luameshmpcolorNew;"
518 elseif(step == "cavity") then
519 polygon = buildCavity(badTriangles, triangulation)
520 polyNew = cleanPoly(polygon)
521 -- remove the bad triangles
522 for j=1,#badTriangles do
523 table.remove(triangulation,badTriangles[j]-(j-1))
525 -- draw the triangles
526 for i=1,#triangulation do
527 PointI = listPoints[triangulation[i][1]]
528 PointJ = listPoints[triangulation[i][2]]
529 PointK = listPoints[triangulation[i][3]]
530 if(triangulation[i].type == "bbox") then
531 output = output .. "draw (".. PointI.x ..",".. PointI.y ..")*u--("..PointJ.x..",".. PointJ.y ..")*u--("..PointK.x..",".. PointK.y ..")*u--cycle withcolor \\luameshmpcolorBbox;"
533 output = output .. "draw (".. PointI.x ..",".. PointI.y ..")*u--("..PointJ.x..",".. PointJ.y ..")*u--("..PointK.x..",".. PointK.y ..")*u--cycle withcolor \\luameshmpcolor;"
536 -- fill and draw the cavity
539 PointI = listPoints[polyNew[i]]
540 path = path .. "(".. PointI.x ..",".. PointI.y ..")*u--"
542 output = output .. "fill " .. path .. "cycle withcolor \\luameshmpcolorBack;"
543 output = output .. "draw " .. path .. "cycle withcolor \\luameshmpcolorNew withpen pencircle scaled 1pt;"
544 -- mark the points of the mesh
545 for i=1,#listPoints do
546 if(listPoints[i].type == "bbox") then
547 output = output .. "dotlabel.llft (btex $\\MeshPoint_{" .. i .. "}$ etex, (" .. listPoints[i].x ..",".. listPoints[i].y .. ")*u ) withcolor \\luameshmpcolorBbox ;"
549 output = output .. "dotlabel.llft (btex $\\MeshPoint_{" .. i .. "}$ etex, (" .. listPoints[i].x ..",".. listPoints[i].y .. ")*u ) withcolor \\luameshmpcolor ;"
552 -- mark the adding point
553 output = output .. "dotlabel.llft (btex $\\NewPoint$ etex,(" .. P.x ..",".. P.y .. ")*u) withcolor \\luameshmpcolorNew ;"
554 elseif(step == "newT") then
555 polygon = buildCavity(badTriangles, triangulation)
556 polyNew = cleanPoly(polygon)
557 -- remove the bad triangles
558 for j=1,#badTriangles do
559 table.remove(triangulation,badTriangles[j]-(j-1))
561 -- draw the triangle of the triangulation
562 for i=1,#triangulation do
563 PointI = listPoints[triangulation[i][1]]
564 PointJ = listPoints[triangulation[i][2]]
565 PointK = listPoints[triangulation[i][3]]
566 if(triangulation[i].type == "bbox") then
567 output = output .. "draw (".. PointI.x ..",".. PointI.y ..")*u--("..PointJ.x..",".. PointJ.y ..")*u--("..PointK.x..",".. PointK.y ..")*u--cycle withcolor \\luameshmpcolorBbox;"
569 output = output .. "draw (".. PointI.x ..",".. PointI.y ..")*u--("..PointJ.x..",".. PointJ.y ..")*u--("..PointK.x..",".. PointK.y ..")*u--cycle withcolor \\luameshmpcolor;"
575 PointI = listPoints[polyNew[i]]
576 path = path .. "(".. PointI.x ..",".. PointI.y ..")*u--"
578 output = output .. "fill " .. path .. "cycle withcolor \\luameshmpcolorBack;"
579 -- draw the new triangles composed by the edges of the polygon and the added point
581 output = output .. "draw".."(".. listPoints[polygon[i][1]].x .. "," .. listPoints[polygon[i][1]].y .. ")*u -- (" .. listPoints[polygon[i][2]].x .. "," .. listPoints[polygon[i][2]].y ..")*u withcolor \\luameshmpcolorNew withpen pencircle scaled 1pt;"
582 output = output .. "draw".."(".. listPoints[polygon[i][1]].x .. "," .. listPoints[polygon[i][1]].y .. ")*u -- (" .. P.x .. "," .. P.y ..")*u withcolor \\luameshmpcolorNew withpen pencircle scaled 1pt;"
583 output = output .. "draw".."(".. listPoints[polygon[i][2]].x .. "," .. listPoints[polygon[i][2]].y .. ")*u -- (" .. P.x .. "," .. P.y ..")*u withcolor \\luameshmpcolorNew withpen pencircle scaled 1pt;"
586 for i=1,#listPoints do
587 if(listPoints[i].type == "bbox") then
588 output = output .. "dotlabel.llft (btex $\\MeshPoint_{" .. i .. "}$ etex, (" .. listPoints[i].x ..",".. listPoints[i].y .. ")*u ) withcolor \\luameshmpcolorBbox ;"
590 output = output .. "dotlabel.llft (btex $\\MeshPoint_{" .. i .. "}$ etex, (" .. listPoints[i].x ..",".. listPoints[i].y .. ")*u ) withcolor \\luameshmpcolor ;"
593 -- mark the added point
594 output = output .. "dotlabel.llft (btex $\\NewPoint$ etex,(" .. P.x ..",".. P.y .. ")*u) withcolor \\luameshmpcolorNew ;"
600 -- build the list of points extern and stop at nbr
601 function buildListExt(chaine, stop)
603 io.input(chaine) -- open the file
605 lines=string.explode(text,"\n+") -- all the lines
606 for i=1,tonumber(stop) do
607 xy=string.explode(lines[i]," +")
608 table.insert(listPoints,{x=tonumber(xy[1]),y=tonumber(xy[2])})
610 xy=string.explode(lines[stop+1]," +")
611 point={x=tonumber(xy[1]),y=tonumber(xy[2])}
612 return point, listPoints
616 function TeXOnePointTikZ(chaine,point,step,color,colorBack,colorNew,colorCircle,scale)
617 output = TeXaddOnePointTikZ(chaine,point,step,color,colorBack,colorNew,colorCircle)
618 output = "\\noindent\\begin{tikzpicture}[x="..scale..",y="..scale.."]".. output .. "\\end{tikzpicture}"
622 function TeXOnePointMPBW(chaine,point,step,scale,mode,bbox)
624 Sx,Sy=string.match(point,"%((.+),(.+)%)")
626 listPoints = buildList(chaine, mode)
629 P, listPoints = buildListExt(chaine,tonumber(point))
631 output = TeXaddOnePointMPBW(listPoints,P,step,bbox)
632 output = "\\leavevmode\\begin{mplibcode}beginfig(0);u:="..scale..";".. output .. "endfig;\\end{mplibcode}"
636 function TeXOnePointMPBWinc(chaine,point,beginning,ending,step,scale,mode,bbox)
638 Sx,Sy=string.match(point,"%((.+),(.+)%)")
640 listPoints = buildList(chaine, mode)
643 P, listPoints = buildListExt(chaine,tonumber(point))
645 output = TeXaddOnePointMPBW(listPoints,P,step,bbox)
646 output = "\\begin{mplibcode}u:="..scale..";"..beginning .. output .. ending .. "\\end{mplibcode}"