/* * Code for converting dxf entities to SVG elements * There are multiple ways for converting different items * If possible most DXF enetities will be converted to paths because that is the most flexable object * * Author: * Matt Squires * * Copyright (C) 2005 Matt Squires * * Released under GNU GPL and LGPL, read the file 'GPL.txt' and 'LGPL.txt' for details */ /* Matt Squires SoC 2005 */ #include"entities2elements.h" #include"tables2svg_info.h" #include #include // The names indicate the DXF entitiy first and the SVG element last // Common elements char* to_arc(double bulge, double r, double start_ang, double end_ang, int precision,char* delim, char * units, double scaling, char *out){ // This is used for arcs, polylines, and lwpolylines char temp[50]; // Assume that we are adding to the input and not starting over strcat(out," A "); // For arcs there is only one radius strcat(out,gcvt(scaling*r,precision,temp) ); strcat(out,","); strcat(out,gcvt(scaling*r,precision,temp) ); strcat(out," 0"); // For arc assume no x-axis rotation. That seems to apply to elipse elements only // Determine if it is a large arc if ( (end_ang > start_ang) && ( (end_ang - start_ang) > 180) ){ //strcat(out," 1,0 "); // Large arc flag...Always use a zero sweep flag strcat(out," 1, "); // Large arc flag...Always use a zero sweep flag } else{ //strcat(out," 0,0 "); // Small arc flag...Always use a zero sweep flag strcat(out," 0,"); } // This may be easier if I allow r to be plus and minus, but for now this works if (bulge > 0){ strcat(out,"0 "); } else{ strcat(out,"1 "); } } // Build Coordinate void coord(entity *ent, int precision,char* delim, char * units, double scaling, char *out); // Pairs of coords with units will be used so often build a function void coord(entity *ent, int precision,char* delim, char * units, double scaling, char *out){ // Pairs of coords with units will be used so often build a function build a dedicated function for returning such char temp[20]; if (units != NULL) scaling = 1; // If units have been defined then ignore the scaling parameter strcat(out, gcvt(scaling*ent->ret_x(),precision,temp) ); // There must be a better function for double to ascii conversion that is defined in most libraries if (units != NULL) strcat(out, units); strcat(out, delim); strcat(out, gcvt(-scaling*ent->ret_y(),precision,temp) ); // Because SVG has a the Y-axis pointed down multiply by -1 if (units != NULL) strcat(out, units); strcat(out, " "); } // DXF Polyline -> SVG void pline2svg(polyline pline, int type, int precision, char * units, double scaling, tables plot_info, char *out); // General function for the conversion of a pline to a SVG element. Very similar functions just make accomidations for parts that may not be supported void pline2svg(polyline pline, int type, int precision, char * units, double scaling, tables plot_info, char *out){ // 0 is pline2path // 1 is pline2pline // 2 is pline2polygon char delim[1]; double mag_bulge = 0; double prev_mag_bulge = 0; std::vector< vertex >::iterator vver_iter; std::vector< vertex > points = pline.ret_points(); if (type < 1){ // Put the first Move To at the first, everything else will be a lineto strcpy(delim," "); strcat(out, "M "); coord( &points[0], precision, delim, units, scaling, out ); prev_mag_bulge = sqrt(pow(points[0].ret_bulge(),2)); // Because the bulge value can be positive or negative calculate the magnitude if ( prev_mag_bulge > pow(0.1,precision) ){ to_arc(pline.bulge(0), pline.bulge_r(0), pline.bulge_start_angle(0), pline.bulge_end_angle(0), precision, delim, units, scaling, out); } for (int i = 1; i < points.size(); i++){ if ( prev_mag_bulge < pow(0.1,precision) ){ // If the previous point was a bulge then don't use a line to strcat(out, "L "); } coord( &points[i], precision, delim, units, scaling, out ); // If bulge > some precsion then add bulge mag_bulge = sqrt(pow(points[i].ret_bulge(),2)); if ( (mag_bulge > pow(0.1,precision)) && (i < (points.size() - 1) )){ to_arc(pline.bulge(i), pline.bulge_r(i), pline.bulge_start_angle(i), pline.bulge_end_angle(i), precision, delim, units, scaling, out); } prev_mag_bulge = mag_bulge; } if ( pline.is_closed() ){ strcat(out,"z"); } strcat(out,"\" "); } else{ strcpy(delim,","); for (int i = 0; i < points.size(); i++){ coord( &points[i], precision, delim, NULL, scaling, out ); // If bulge > some precsion then add bulge } // if the element is a SVG::pline and the DXF::pline is closed then simulate by adding an extra point if ( (type == 1) && pline.is_closed() ){ coord( &points[0], precision, delim, NULL, scaling, out ); } } } char* pline2path(polyline pline, char * units, double scaling, tables plot_info){ // Convert a dxf polyline to a SVG path. This is the closest conversion of the DXF polyline to an SVG element char *out_ptr; char out[10000] = "ret_ltype_name(temp),ent_ptr->ret_layer_name(temp) ), precision, scaling, out); // Add the linetype information strcat(out," />"); out_ptr = out; return out_ptr; } char* pline2pline(polyline pline, char * units, double scaling, tables plot_info){ // Convert a dxf polyline to a SVG polyline. The conversion is not 1:1 because the SVG pline doesn't support closed objects or curves entity *ent_ptr = &pline; char temp[2000]; int precision = 6; char out[10000] = "ret_ltype_name(temp), ent_ptr->ret_layer_name(temp)); pattern2dasharray(linfo, precision, scaling, out); // Add the linetype information //strcpy(temp," "); strcat(out,"points=\""); //strcat(out,""); char *out_ptr = out; return out_ptr; } char* pline2polygon(polyline pline, char * units, double scaling, tables plot_info){ // Convert a dxf polyline to a SVG polygon. The conversion is not 1:1 because the SVG polygone assumes a closed path. If the pline is not closed it will be forced closed //return pline2svg(pline, 2, 6, units, double scaling,out); } // DXF LWPolyline -> SVG // This could be a template with polyline and lwpolyline but right now it is not that important void lwpline2svg(lwpolyline pline, int type, int precision, char * units, double scaling, tables plot_info, char *out); // General function for the conversion of a pline to a SVG element. Very similar functions just make accomidations for parts that may not be supported void lwpline2svg(lwpolyline pline, int type, int precision, char * units, double scaling, tables plot_info, char *out){ // 0 is pline2path // 1 is pline2pline // 2 is pline2polygon char delim[1]; double mag_bulge = 0; double prev_mag_bulge = 0; std::vector< vertex >::iterator vver_iter; std::vector< vertex > points = pline.ret_points(); if (type < 1){ // Put the first Move To at the first, everything else will be a lineto strcpy(delim," "); strcat(out, "M "); coord( &points[0], precision, delim, NULL, scaling, out ); prev_mag_bulge = sqrt(pow(points[0].ret_bulge(),2)); // Because the bulge value can be positive or negative calculate the magnitude if ( prev_mag_bulge > pow(0.1,precision) ){ to_arc(pline.bulge(0),pline.bulge_r(0), pline.bulge_start_angle(0), pline.bulge_end_angle(0), precision, delim, NULL, scaling, out); } for (int i = 1; i < points.size(); i++){ if ( prev_mag_bulge < pow(0.1,precision) ){ // If the previous point was a bulge then don't use a line to strcat(out, "L "); } coord( &points[i], precision, delim, NULL , scaling, out ); // If bulge > some precsion then add bulge mag_bulge = sqrt(pow(points[i].ret_bulge(),2)); if ( ( mag_bulge > pow(0.1,precision) ) && (i < (points.size() - 1) )){ // Make sure the final point doesn't add a bulge on accident to_arc(pline.bulge(i), pline.bulge_r(i), pline.bulge_start_angle(i), pline.bulge_end_angle(i), precision, delim, units, scaling, out); } prev_mag_bulge = mag_bulge; } if ( pline.is_closed() ){ strcat(out,"z"); } strcat(out,"\" "); } else{ strcpy(delim,","); for (int i = 0; i < points.size(); i++){ coord( &points[i], precision, delim, units, scaling, out ); // If bulge > some precsion then add bulge } // if the element is a SVG::pline and the DXF::pline is closed then simulate by adding an extra point if ( (type == 1) && pline.is_closed() ){ coord( &points[0], precision, delim, units, scaling, out ); } } } char* lwpline2path(lwpolyline pline, char * units, double scaling, tables plot_info){ // Convert a dxf polyline to a SVG path. This is the closest conversion of the DXF polyline to an SVG element char *out_ptr; char out[10000] = "ret_ltype_name(temp),ent_ptr->ret_layer_name(temp) ), precision, scaling, out); // Add the linetype information strcat(out," />"); out_ptr = out; return out_ptr; } // DXF ARC -> SVG char* arc2path(arc a, int precision, char * units, double scaling, tables plot_info, char *out){ // So far this appears to be the only way to convert arcs into something recognized by SVG char *out_ptr; char temp[20]; entity *ent_ptr = &a; strcpy(out,"ret_x()+a.ret_radius()*cos( a.ret_srt_ang()*3.14159/180 )),precision,temp) ); strcat(out," "); strcat(out,gcvt(-1*scaling*(ent_ptr->ret_y()+a.ret_radius()*sin( a.ret_srt_ang()*3.14159/180 )),precision,temp) ); strcat(out," A "); // For arcs there is only one radius strcat(out,gcvt(scaling*a.ret_radius(),precision,temp) ); strcat(out,","); strcat(out,gcvt(scaling*a.ret_radius(),precision,temp) ); strcat(out," 0"); // For arc assume no x-axis rotation. That seems to apply to elipse elements only // Determine if it is a large arc if ( (a.ret_end_ang() > a.ret_srt_ang()) && ( (a.ret_end_ang() - a.ret_srt_ang()) > 180) ){ strcat(out," 1,0 "); // Large arc flag...Always use a zero sweep flag } else{ strcat(out," 0,0 "); // Small arc flag...Always use a zero sweep flag } //The final point strcat(out,gcvt(scaling*(ent_ptr->ret_x()+a.ret_radius()*cos( a.ret_end_ang()*3.14159/180 )),precision,temp) ); strcat(out,","); strcat(out,gcvt(-1*scaling*(ent_ptr->ret_y()+a.ret_radius()*sin( a.ret_end_ang()*3.14159/180 )),precision,temp) ); strcat(out,"\" fill=\"none\" stroke=\"black\" stroke-width=\"1\" "); ltype linfo = plot_info.ret_ltype(ent_ptr->ret_ltype_name(temp), ent_ptr->ret_layer_name(temp)); pattern2dasharray(linfo, precision, scaling, out); // Add the linetype information strcat(out, " />"); out_ptr = out; return out_ptr; } // DXF Circle -> SVG char* circle2circle(circle circ, int precision, char * units, double scaling, tables plot_info, char *out){ // Direct conversion of DXF circle to SVG circle char *out_ptr; char temp[1000]="\" cy=\""; entity *ent_ptr = ˆ strcpy(out,"ret_ltype_name(temp), ent_ptr->ret_layer_name(temp)); //plot_info.ret_ltype(ent_ptr->ret_ltype_name(temp), ent_ptr->ret_layer_name(temp)); pattern2dasharray(linfo, precision, scaling, out); // Add the linetype information //pattern2dasharray(plot_info.ret_ltype(ent_ptr->ret_ltype_name(temp), ent_ptr->ret_layer_name(temp)), precision, scaling, out); // Add the linetype information strcat(out, " />"); out_ptr = out; return out_ptr; } char* circle2path(circle circ, int precision, char * units, double scaling, tables plot_info, char *out){ // Conversion of DXF circle to SVG circle assuming the path will represent the circle char *out_ptr; char temp[20]=","; entity *ent_ptr = ˆ strcpy(out,"ret_x()-circ.ret_radius(),precision,temp) ); strcat(out," "); strcat(out,gcvt(ent_ptr->ret_y(),precision,temp) ); strcat(out," a"); strcat(out,gcvt(circ.ret_radius(),precision,temp) ); strcat(out,","); strcat(out,gcvt(circ.ret_radius(),precision,temp) ); strcat(out,"0 0,0 0,0\" fill=\"none\" stroke=\"black\" stroke-width=\"1\""); out_ptr = out; return out_ptr; } // DXF Line -> SVG char* line2line(line ln, int precision, char * units, double scaling, tables plot_info, char *out){ // Directly convert DXF to SVG because it works char *out_ptr; char temp[20]; entity *ent_ptr = &ln; strcpy(out,"ret_x(),precision,temp) ); strcat(out,units); strcat(out,"\" y1=\""); strcat(out,gcvt(-1*ent_ptr->ret_y(),precision,temp) ); // Put in an extra minus because of the way SVG has defined the axis strcat(out,units); strcat(out,"\" x2=\""); strcat(out,gcvt(ln.ret_xf(),precision,temp) ); strcat(out,units); strcat(out,"\" y2=\""); strcat(out,gcvt(-1*ln.ret_yf(),precision,temp) ); // Put in an extra minus because of the way SVG has defined the axis strcat(out,units); strcat(out,"\" stroke-width=\"1\" stroke=\"black\" "); ltype linfo = plot_info.ret_ltype(ent_ptr->ret_ltype_name(temp), ent_ptr->ret_layer_name(temp)); pattern2dasharray(linfo, precision, scaling, out); // Add the linetype information strcat(out, " />"); out_ptr = out; return out_ptr; } char* line2path(line ln, int precision, char * units, double scaling, tables plot_info, char *out){ // Convert DXF line to SVG path char *out_ptr; char temp[20]; entity *ent_ptr = &ln; strcpy(out,"ret_x(),precision,temp) ); strcat(out," "); strcat(out,gcvt(scaling*ent_ptr->ret_y(),precision,temp) ); strcat(out," L"); strcat(out,gcvt(scaling*ln.ret_xf(),precision,temp) ); strcat(out," "); strcat(out,gcvt(scaling*ln.ret_yf(),precision,temp) ); strcat(out,"\" fill=\"none\" stroke=\"black\" stroke-width=\"1\" /"); out_ptr = out; return out_ptr; } // DXF Text -> SVG char* text2text(text txt, int precision, char * units, double scaling, tables plot_info, char *out){ // Directly convert DXF to SVG because it works char *out_ptr; char temp[10000]; entity *ent_ptr = &txt; // If the text is rotated use the transform matrix if ( txt.ret_txt_rot() > precision ){ double ca = cos(0.017453*txt.ret_txt_rot()); // ca = cosine(a) double sa = sin(-0.017453*txt.ret_txt_rot()); // sa = sine(a) double tx = ent_ptr->ret_x()*scaling; double ty = -ent_ptr->ret_y()*scaling; // Apply a translation to the orgin, then a rotation, then a translation back to the original position double a = ca; double b = sa; double c = -sa; double d = ca; double e = -1*(tx*ca-ty*sa-tx); double f = -1*(tx*sa+ty*ca-ty); strcpy(out, "\nret_x(),precision,temp) ); strcat(out,units); strcat(out,"\" y=\"-"); // Put in an extra minus because of the way SVG has defined the axis strcat(out,gcvt(ent_ptr->ret_y(),precision,temp) ); strcat(out,units); */ strcat(out,gcvt(ent_ptr->ret_x()*scaling,precision,temp) ); //strcat(out,units); strcat(out,"\" y=\"-"); // Put in an extra minus because of the way SVG has defined the axis strcat(out,gcvt(ent_ptr->ret_y()*scaling,precision,temp) ); //strcat(out,units); strcat(out,"\" font-family=\"Verdana\" font-size=\""); strcat(out,gcvt(scaling*txt.ret_txt_ht(),precision,temp) ); strcat(out,"\" Fill=\"black\""); strcat(out," >"); // Now put in the text strcat(out,txt.ret_text(temp)); // Now close the text element strcat(out,""); // If the text was rotated finish off the tranform group if ( txt.ret_txt_rot() > precision ){ strcat(out,""); } out_ptr = out; return out_ptr; } // DXF Insert -> SVG char* insert2group(insert in, int precision, char * units, double scaling, tables plot_info, blocks blks, char *out){ char *out_ptr; char tmp_char[100000]; // get the block using the name from the insert information block blk = blks.ret_block(in.name(tmp_char)); entity *ent_ptr = ∈ entities *ents_ptr = &blk; // For now just translations MBS 22 Aug 05 strcpy(out, "ret_x(),precision,tmp_char) ); strcat(out,","); strcat(out,gcvt(-scaling*ent_ptr->ret_y(),precision,tmp_char) ); strcat(out,")\" >\n"); // Now convert the entities in the block std::vector< polyline > plines = ents_ptr->ret_plines(); std::vector< lwpolyline > lwplines = ents_ptr->ret_lwplines(); std::vector< arc > arcs = ents_ptr->ret_arcs(); std::vector< circle > circs = ents_ptr->ret_circles(); std::vector< line > lns = ents_ptr->ret_lines(); std::vector< text > txts = ents_ptr->ret_texts(); for(int i = 0; i < plines.size();i++){ strcat( out,pline2pline(plines[i], units, scaling, plot_info ) ); strcat( out, "\n" ); } for(int i = 0; i < lwplines.size();i++){ strcat( out,lwpline2path(lwplines[i], units, scaling, plot_info ) ); strcat( out, "\n" ); } for(int i = 0; i < arcs.size();i++){ strcat( out, arc2path(arcs[i], 6,units, scaling, plot_info, tmp_char ) ); strcat( out, "\n" ); } for(int i = 0; i < circs.size();i++){ strcat( out, circle2circle(circs[i], 6, units, scaling, plot_info, tmp_char) ); strcat( out, "\n" ); } for(int i = 0; i < lns.size();i++){ strcat( out, line2line(lns[i], 6, units, scaling, plot_info, tmp_char) ); strcat( out, "\n" ); } for(int i = 0; i < txts.size();i++){ strcat( out, text2text(txts[i], 6, units, scaling, plot_info, tmp_char) ); strcat( out, "\n" ); } // End the group strcat(out,""); out_ptr = out; return out_ptr; } char* write_by_layer(int output_type, entities &ents, tables &tbls, blocks &blks, double scaling, char * units, char * layer, char * out){ // output_type = 0 is to std:out // output_type = 1 is to the input filename but with .dxf on the end // For now everything will go to stdout later may directed to other places // Get the various file informations as dependent on the layer type std::vector< polyline > plines = ents.ret_plines(layer); std::vector< lwpolyline > lwplines = ents.ret_lwplines(layer); std::vector< arc > arcs = ents.ret_arcs(layer); std::vector< circle > circs = ents.ret_circles(layer); std::vector< line > lns = ents.ret_lines(layer); std::vector< text > txts = ents.ret_texts(layer); std::vector< insert > ins = ents.ret_inserts(layer); // It would be better to redirect stdout to different places. That would make the code cleaner but I don't think it will work better char tmp_char[100000]; for(int i = 0; i < plines.size();i++){ if (output_type == 0){ std::cout << "\t" << pline2path(plines[i], NULL, scaling, tbls ) << std::endl; } else if (output_type == 1){ std::cout << "\t" << pline2path(plines[i], NULL, scaling, tbls ) << std::endl; } } for(int i = 0; i < lwplines.size();i++){ if (output_type == 0){ std::cout << "\t" << lwpline2path(lwplines[i], units, scaling, tbls ) << std::endl; } else if (output_type == 1){ std::cout << "\t" << lwpline2path(lwplines[i], units, scaling, tbls ) << std::endl; } } for(int i = 0; i < arcs.size();i++){ if (output_type == 0){ std::cout << "\t" << arc2path(arcs[i], 6,units, scaling, tbls, tmp_char ) << std::endl; } else if (output_type == 1){ std::cout << "\t" << arc2path(arcs[i], 6,units, scaling, tbls, tmp_char ) << std::endl; } } for(int i = 0; i < circs.size();i++){ if (output_type == 0){ std::cout << "\t" << circle2circle(circs[i], 6, units, scaling, tbls, tmp_char) << std::endl; } else if (output_type == 1){ std::cout << "\t" << circle2circle(circs[i], 6, units, scaling, tbls, tmp_char) << std::endl; } } for(int i = 0; i < lns.size();i++){ if (output_type == 0){ std::cout << "\t" << line2line(lns[i], 6, units, scaling, tbls, tmp_char) << std::endl; } else if (output_type == 1){ std::cout << "\t" << line2line(lns[i], 6, units, scaling, tbls, tmp_char) << std::endl; } } for(int i = 0; i < txts.size();i++){ if (output_type == 0){ std::cout << "\t" << text2text(txts[i], 6, units, scaling, tbls, tmp_char) << std::endl; } else if (output_type == 1){ std::cout << "\t" << text2text(txts[i], 6, units, scaling, tbls, tmp_char) << std::endl; } } for(int i = 0; i < ins.size();i++){ if (output_type == 0){ std::cout << "\t" << insert2group(ins[i], 6, units, scaling, tbls, blks, tmp_char) << std::endl; } else if (output_type == 1){ std::cout << "\t" << insert2group(ins[i], 6, units, scaling, tbls, blks, tmp_char) << std::endl; } } } char* write_all(int output_type, entities &ents, tables &tbls, blocks &blks, double scaling, char * units, char * out){ // output_type = 0 is to std:out // output_type = 1 is to the input filename but with .dxf on the end // For now everything will go to stdout later may directed to other places // Get the various file informations as dependent on the layer type std::vector< polyline > plines = ents.ret_plines(); std::vector< lwpolyline > lwplines = ents.ret_lwplines(); std::vector< arc > arcs = ents.ret_arcs(); std::vector< circle > circs = ents.ret_circles(); std::vector< line > lns = ents.ret_lines(); std::vector< text > txts = ents.ret_texts(); std::vector< insert > ins = ents.ret_inserts(); // It would be better to redirect stdout to different places. That would make the code cleaner but I don't think it will work better char tmp_char[100000]; for(int i = 0; i < plines.size();i++){ if (output_type == 0){ std::cout << "\t" << pline2path(plines[i], NULL, scaling, tbls ) << std::endl; } else if (output_type == 1){ std::cout << "\t" << pline2path(plines[i], NULL, scaling, tbls ) << std::endl; } } for(int i = 0; i < lwplines.size();i++){ if (output_type == 0){ std::cout << "\t" << lwpline2path(lwplines[i], units, scaling, tbls ) << std::endl; } else if (output_type == 1){ std::cout << "\t" << lwpline2path(lwplines[i], units, scaling, tbls ) << std::endl; } } for(int i = 0; i < arcs.size();i++){ if (output_type == 0){ std::cout << "\t" << arc2path(arcs[i], 6,units, scaling, tbls, tmp_char ) << std::endl; } else if (output_type == 1){ std::cout << "\t" << arc2path(arcs[i], 6,units, scaling, tbls, tmp_char ) << std::endl; } } for(int i = 0; i < circs.size();i++){ if (output_type == 0){ std::cout << "\t" << circle2circle(circs[i], 6, units, scaling, tbls, tmp_char) << std::endl; } else if (output_type == 1){ std::cout << "\t" << circle2circle(circs[i], 6, units, scaling, tbls, tmp_char) << std::endl; } } for(int i = 0; i < lns.size();i++){ if (output_type == 0){ std::cout << "\t" << line2line(lns[i], 6, units, scaling, tbls, tmp_char) << std::endl; } else if (output_type == 1){ std::cout << "\t" << line2line(lns[i], 6, units, scaling, tbls, tmp_char) << std::endl; } } for(int i = 0; i < txts.size();i++){ if (output_type == 0){ std::cout << "\t" << text2text(txts[i], 6, units, scaling, tbls, tmp_char) << std::endl; } else if (output_type == 1){ std::cout << "\t" << text2text(txts[i], 6, units, scaling, tbls, tmp_char) << std::endl; } } for(int i = 0; i < ins.size();i++){ if (output_type == 0){ std::cout << "\t" << insert2group(ins[i], 6, units, scaling, tbls, blks, tmp_char) << std::endl; } else if (output_type == 1){ std::cout << "\t" << insert2group(ins[i], 6, units, scaling, tbls, blks, tmp_char) << std::endl; } } }