// iges144.cmd // Surface Evolver script to write IGES file for surface, using IGES // entity type 144, which handles linear, quadratic, // and cubic triangles (among many other types not of interest). // This version uses IGES element 144, a trimmed parametric surface. // Uses polynomial spline element 114 as parametric surface. /* Assumptions: 3D soapfilm model, up to cubic model, not torus or symmetry group (use the "detorus" command if necessary to convert torus or symmetry to unwrapped surface, but remember that detorus alters the surface) Does facets only, not edges. Does facets satisfying "show" criterion. Facet color is frontcolor on both sides. */ // This version automatically handles quadratic and cubic models. // usage: iges144 >>> "filename.igs" // Set up color translation function define iges_colors_list integer[16] iges_black := 1 iges_colors_list[red] := 2 iges_colors_list[green] := 3 iges_colors_list[blue] := 4 iges_colors_list[yellow] := 5 iges_colors_list[magenta] := 6 iges_colors_list[cyan] := 7 iges_colors_list[white] := 8 iges_colors_list[brown] := 2 // red iges_colors_list[lightgray] := 8 // white iges_colors_list[darkgray] := 1 // black iges_colors_list[lightblue] := 4 // blue iges_colors_list[lightcyan] := 7 // cyan iges_colors_list[lightred] := 2 // red iges_colors_list[lightmagenta] := 7 iges_colors_list[lightgreen] := 3 function integer iges_color_translate(integer evolver_color) { if evolver_color == black then return iges_black else return iges_colors_list[evolver_color]; } iges_edges_show := 1; // but doesn't seem to have effect // Coefficients of the 2D cubic polynomial for coordinate jj procedure iges114_coeff(integer fid, integer jj) { local v1,v2,v3,v4,v5,v6,v7,v8,v9,vA; foreach facet[fid] ff where show and color >= 0 do if linear then { c0c0 := ff.vertex[1].x[jj]; c1c0 := ff.vertex[2].x[jj]-ff.vertex[1].x[jj]; c0c1 := ff.vertex[3].x[jj]-ff.vertex[1].x[jj]; c1c1 := 0; c0c2 := 0; c0c3 := 0; c1c2 := 0; c1c3 := 0; c2c0 := 0; c2c1 := 0; c2c2 := 0; c2c3 := 0; c3c0 := 0; c3c1 := 0; c3c2 := 0; c3c3 := 0; } else if quadratic then { v1 := ff.vertex[1].x[jj]; v2 := ff.vertex[4].x[jj]; v3 := ff.vertex[2].x[jj]; v4 := ff.vertex[6].x[jj]; v5 := ff.vertex[5].x[jj]; v6 := ff.vertex[3].x[jj]; c0c0 := v1; c0c1 := (-3*v1)/2. + 2*v4 - v6/2.; c0c2 := v1/2. - v4 + v6/2.; c1c0 := (-3*v1)/2. + 2*v2 - v3/2.; c1c1 := v1 - v2 - v4 + v5; c1c2 := 0; c2c0 := v1/2. - v2 + v3/2.; c2c1 := 0; c2c2 := 0; c0c3 := 0; c1c3 := 0; c2c3 := 0; c3c0 := 0; c3c1 := 0; c3c2 := 0; c3c3 := 0; } else if lagrange and lagrange_order == 2 then { v1 := ff.vertex[1].x[jj]; v2 := ff.vertex[2].x[jj]; v3 := ff.vertex[3].x[jj]; v4 := ff.vertex[4].x[jj]; v5 := ff.vertex[5].x[jj]; v6 := ff.vertex[6].x[jj]; c0c0 := v1; c0c1 := (-3*v1)/2. + 2*v4 - v6/2.; c0c2 := v1/2. - v4 + v6/2.; c1c0 := (-3*v1)/2. + 2*v2 - v3/2.; c1c1 := v1 - v2 - v4 + v5; c1c2 := 0; c2c0 := v1/2. - v2 + v3/2.; c2c1 := 0; c2c2 := 0; c0c3 := 0; c1c3 := 0; c2c3 := 0; c3c0 := 0; c3c1 := 0; c3c2 := 0; c3c3 := 0; } else if lagrange and lagrange_order == 3 then { v1 := ff.vertex[1].x[jj]; v2 := ff.vertex[2].x[jj]; v3 := ff.vertex[3].x[jj]; v4 := ff.vertex[4].x[jj]; v5 := ff.vertex[5].x[jj]; v6 := ff.vertex[6].x[jj]; v7 := ff.vertex[7].x[jj]; v8 := ff.vertex[8].x[jj]; v9 := ff.vertex[9].x[jj]; vA := ff.vertex[10].x[jj]; c0c0 := v1; c0c1 := (-11*v1)/6. + 3*v5 - (3*v8)/2. + vA/3.; c0c2 := v1 - (5*v5)/2. + 2*v8 - vA/2.; c0c3 := -v1/6. + v5/2. - v8/2. + vA/6.; c1c0 := (-11*v1)/6. + 3*v2 - (3*v3)/2. + v4/3.; c1c1 := 2*v1 - (5*v2)/2. + v3/2. - (5*v5)/2. + 3*v6 - v7/2. + v8/2. - v9/2.; c1c2 := -v1/2. + v2/2. + v5 - v6 - v8/2. + v9/2.; c1c3 := 0; c2c0 := v1 - (5*v2)/2. + 2*v3 - v4/2.; c2c1 := -v1/2. + v2 - v3/2. + v5/2. - v6 + v7/2.; c2c2 := 0; c2c3 := 0; c3c0 := -v1/6. + v2/2. - v3/2. + v4/6.; c3c1 := 0; c3c2 := 0; c3c3 := 0; } } // end iges114_coeff iges_parameter_counter := 0; procedure print_coeffs(integer dirnum) { local message; message := sprintf "%18.15f,%18.15f,",c0c0,c1c0; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,dirnum,iges_parameter_counter; message := sprintf "%18.15f,%18.15f,",c2c0,c3c0; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,dirnum,iges_parameter_counter; message := sprintf "%18.15f,%18.15f,",c0c1,c1c1; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,dirnum,iges_parameter_counter; message := sprintf "%18.15f,%18.15f,",c2c1,c3c1; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,dirnum,iges_parameter_counter; message := sprintf "%18.15f,%18.15f,",c0c2,c1c2; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,dirnum,iges_parameter_counter; message := sprintf "%18.15f,%18.15f,",c2c2,c3c2; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,dirnum,iges_parameter_counter; message := sprintf "%18.15f,%18.15f,",c0c3,c1c3; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,dirnum,iges_parameter_counter; message := sprintf "%18.15f,%18.15f,",c1c3,c2c3; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,dirnum,iges_parameter_counter; } // end print_coeffs iges144 := { local start_counter,global_counter,message,xmax,ymax,zmax; local maxsize,paramdata,structure,linefont,level,view; local transmat,label,status,directory_counter,lineweight; local colornum,paramcount,form,reserved,entlabel,entsubscr; local ctype,ptype,mvalue,nvalue,minu,maxu; local minv,maxv,co00,co10,co01,co11,line,subcount; local entype, ptr102; if torus then { errprintf "Cannot run 'iges144' command in torus mode. Do 'detorus' first.\n"; abort; }; if surface_dimension != 2 then { errprintf "iges144 requires soapfilm model surface, not string model.\n"; abort; }; if !linear and !quadratic and (!lagrange_order==2) and (!lagrange_order==3) then { errprintf "iges144 requires surface to be linear, quadratic, or cubic.\n"; abort; }; // Flag section // Don't need this since not doing binary or compressed format. // Start section start_counter := 0; start_counter += 1; printf "%-72sS%07d\n","IGES version of Surface Evolver surface",start_counter; start_counter += 1; printf " %-69sS%07d\n",datafilename,start_counter; start_counter += 1; printf "%-72sS%07d\n","Created using iges.cmd Evolver script.", start_counter; // Global section global_counter := 0; global_counter += 1; printf "%-72sG%07d\n","1H,,1H;,",global_counter; global_counter += 1; printf "%02dH%-69sG%07d\n",sizeof("Surface Evolver"),"Surface Evolver,", global_counter; global_counter += 1; message := sprintf "%s,",datafilename; printf "%02dH%-69sG%07d\n",sizeof(datafilename),message,global_counter; global_counter += 1; printf "%02dH%-69sG%07d\n",sizeof("Surface Evolver"),"Surface Evolver,", global_counter; global_counter += 1; printf "%02dH%-69sG%07d\n",sizeof("Surface Evolver"),"Surface Evolver,", global_counter; global_counter += 1; printf "%-72sG%07d\n","32,75,6,75,15,,1.0,1,2HIN,32768,0.0394,", global_counter; global_counter += 1; printf "%-72sG%07d\n","15H00000000.000000,", global_counter; // date xmax := max(vertex,abs(x)); ymax := max(vertex,abs(y)); zmax := max(vertex,abs(z)); maxsize := (xmax > ymax) ? xmax : ymax; maxsize := (zmax > maxsize) ? zmax : maxsize; message := sprintf "%g,%g,",maxsize/10000000,maxsize; global_counter += 1; printf "%-72sG%07d\n",message, global_counter; global_counter += 1; printf "%02dH%-69sG%07d\n",sizeof("Name of author"),"Name of author,", global_counter; global_counter += 1; printf "%02dH%-69sG%07d\n",sizeof("Author's organization"), "Author's organization,", global_counter; global_counter += 1; printf "%-72sG%07d\n","15H00000000.000000;", global_counter; // date // Directory entry section. Each entry 20 8-char fields on two lines. // Fields with default values entype := 0; // 1 and 11 paramdata := 1; // 2 structure := 0; // 3 linefont := 0; // 4 level := 0; // 5 view := 0; // 6 transmat := 0; // 7 label := 0; // 8 status := "00000000"; // 9; actually 4 two-digit numbers directory_counter := 0; // 10 and 20 lineweight := 0; // 12 colornum := 0; // 13 paramcount := 0; // 14 form := 0; // 15 reserved := " "; // 16 and 17 entlabel := "entity"; // 18 entsubscr := 0; // 19 /* (u,v) parameter ranges */ minu := 0; maxu := lagrange_order; minv := 0; maxv := lagrange_order; // One set of trim lines printf" 110 1 0 1 0 0 0 000110001D 1\n"; printf" 110 1 0 1 0 0 0 0D 2\n"; printf" 110 2 0 1 0 0 0 000110001D 3\n"; printf" 110 1 0 1 0 0 0 0D 4\n"; printf" 110 3 0 1 0 0 0 000110001D 5\n"; printf" 110 1 0 1 0 0 0 0D 6\n"; directory_counter += 6; // Composite curve entity made from trim lines printf" 102 4 0 1 0 0 0 000010501D 7\n"; printf" 102 1 0 1 0 0 0 0D 8\n"; ptr102 := directory_counter+1; directory_counter += 2; paramdata += 4; // Facets as "parametric surface" types status := "00010001"; entlabel := " FACET"; define facet attribute fpdata integer; define facet attribute fdir integer; foreach facet ff where show and color >= 0 do { // Spline element ff.fpdata := paramdata; entsubscr := ff.id; directory_counter += 1; ff.fdir := directory_counter; printf " 114%8d%8d%8d%8d%8d%8d%8d%8sD%7d\n",paramdata,structure, linefont,level,view,transmat,label,status,directory_counter; directory_counter += 1; paramcount := 25; printf " 114%8d%8d%8d%8d%8s%8s%8s%8dD%7d\n",lineweight, iges_color_translate(ff.color), paramcount,form,reserved,reserved,entlabel,entsubscr,directory_counter; paramdata += paramcount; // 25 lines per facet in data section // Curve on parametric surface element 142 directory_counter += 1; printf" 142%8d 0 1 0 0 0 000010501D%7d\n", paramdata, directory_counter; paramdata += 1; directory_counter += 1; printf" 142 1%8d 1 0 0 0 0D%7d\n", iges_edges_show ? iges_color_translate(black) : iges_color_translate(ff.color), // no effect directory_counter; // Trimmed surface, finally. directory_counter += 1; printf" 144%8d 0 1 0 0 0 000000001D%7d\n", paramdata, directory_counter; paramdata += 1; directory_counter += 1; printf" 144 1%8d 1 0 0 0 face2 0D%7d\n", iges_color_translate(ff.color), directory_counter; }; // Geometry element status := "00000301"; paramcount := ceil(facet_count/10); form := 7; entlabel := " SURFACE"; entsubscr := 1; directory_counter += 1; printf " 402%8d%8d%8d%8d%8d%8d%8d%8sD%7d\n",paramdata,structure, linefont,level,view,transmat,label,status,directory_counter; directory_counter += 1; printf " 402%8d%8d%8d%8d%8s%8s%8s%8dD%7d\n",lineweight,colornum, paramcount,form,reserved,reserved,entlabel,entsubscr,directory_counter; // Parameter data section iges_parameter_counter := 0; // Trim lines message:= sprintf "110,0.0,0.0,0.0,%g,0.0,0.0;",maxu; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,1,iges_parameter_counter; message:= sprintf "110,%g,0.0,0.0,0.0,%g,0.0;",maxu,maxv; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,3,iges_parameter_counter; message:= sprintf "110,0.0,%g,0.0,0.0,0.0,0.0;",maxv; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,5,iges_parameter_counter; // Composite curve message:="102,3,1,3,5;"; iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",message,7,iges_parameter_counter; // Facets ptype := 0; // unspecified mvalue := 1; // number of u segments nvalue := 1; // number of v segments if linear then { ctype := 1; } else if quadratic or (lagrange_order == 2) then { ctype := 2;} else { ctype := 3; }; foreach facet ff where show and color >= 0 do { iges_parameter_counter += 1; if ff.fpdata != iges_parameter_counter then errprintf "ERROR: bad facet parameter line number, facet %d. Is %d, should be %d.\n", ff.id,iges_parameter_counter,ff.fpdata; message := sprintf "114,%d,%d,%d,%d,%g,%g,%g,%g,",ctype,ptype, mvalue,nvalue,minu,maxu,minv,maxv; printf "%-64s%8dP%7d\n",message,ff.fdir,iges_parameter_counter; // x coefficients, 2 per line iges114_coeff(ff.id,1); print_coeffs(ff.fdir); // y coefficients, 2 per line iges114_coeff(ff.id,2); print_coeffs(ff.fdir); // z coefficients, 2 per line iges114_coeff(ff.id,3); print_coeffs(ff.fdir); // Curve on parametric surface iges_parameter_counter += 1; message := sprintf"142,3,%d,%d,0,1;",ff.fdir,ptr102; printf "%-64s%8dP%7d\n",message,ff.fdir+2,iges_parameter_counter; // Trimmed parametric surface entity iges_parameter_counter += 1; message := sprintf"144,%d,1,0,%d;",ff.fdir,ff.fdir+2; printf "%-64s%8dP%7d\n",message,ff.fdir+4,iges_parameter_counter; }; // Geometry element line := sprintf "402,%d,",facet_count; subcount := 0; foreach facet ff where show and color >= 0 do { if subcount == 10 then { iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",line,directory_counter-1,iges_parameter_counter; line := "" ; subcount := 0; }; line := sprintf"%s%d,",line,ff.fdir+4; subcount += 1; }; line := sprintf "%s0,0;",line; // sample files ended with 2 extra 0's iges_parameter_counter += 1; printf "%-64s%8dP%7d\n",line,directory_counter-1,iges_parameter_counter; // Terminate section printf "S%07dG%07dD%07dP%07d%40sT0000001\n",start_counter,global_counter, directory_counter,iges_parameter_counter," "; } // End iges144.cmd // Usage: iges144 >>> "filename.igs"