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added the writing of the DXF header to the exporter, as it is required by a lot of importers (like Blender)

This commit is contained in:
Marco Callieri 2016-01-05 10:09:02 +00:00
parent d32b8eb287
commit dd56766889
1 changed files with 74 additions and 2 deletions
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76
wrap/io_trimesh/export_dxf.h
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@ -47,6 +47,9 @@ public:
FILE * o = fopen(filename,"w"); FILE * o = fopen(filename,"w");
if(o==NULL) return 1; if(o==NULL) return 1;
writeHeader(o, m);
fprintf(o,"0\n"); fprintf(o,"0\n");
fprintf(o,"SECTION\n"); fprintf(o,"SECTION\n");
fprintf(o,"2\n"); fprintf(o,"2\n");
@ -102,17 +105,20 @@ public:
} }
static bool SaveEdge(SaveMeshType &mp, const char * filename) static bool SaveEdge(SaveMeshType &m, const char * filename)
{ {
FILE * o = fopen(filename,"w"); FILE * o = fopen(filename,"w");
if(o==NULL) return 1; if(o==NULL) return 1;
writeHeader(o, m);
fprintf(o,"0\n"); fprintf(o,"0\n");
fprintf(o,"SECTION\n"); fprintf(o,"SECTION\n");
fprintf(o,"2\n"); fprintf(o,"2\n");
fprintf(o,"ENTITIES\n"); fprintf(o,"ENTITIES\n");
typename SaveMeshType::EdgeIterator ei; typename SaveMeshType::EdgeIterator ei;
for(ei=mp.edge.begin(); ei!=mp.edge.end();++ei) for(ei=m.edge.begin(); ei!=m.edge.end();++ei)
{ {
CoordType p1 = (*ei).V(0)->P(); CoordType p1 = (*ei).V(0)->P();
CoordType p2 = (*ei).V(1)->P(); CoordType p2 = (*ei).V(1)->P();
@ -145,6 +151,72 @@ public:
return true; return true;
} }
static bool writeHeader(FILE* o, SaveMeshType &mp)
{
// standard DXF header
// most of data is meaningless, but required by a lot of importers
fprintf(o, "999\n");
fprintf(o, "DXF created by VCGLib\n");
fprintf(o, "0\n");
fprintf(o, "SECTION\n");
fprintf(o, "2\n");
fprintf(o, "HEADER\n");
// Version of the dxf specs, most reader need version 12 or above (AC1009)
fprintf(o, "9\n");
fprintf(o, "$ACADVER\n");
fprintf(o, "1\n");
fprintf(o, "AC1009\n");
// Insertion base set by BASE command (in WCS)
fprintf(o, "9\n");
fprintf(o, "$INSBASE\n");
fprintf(o, "10\n");
fprintf(o, "0.0\n");
fprintf(o, "20\n");
fprintf(o, "0.0\n");
fprintf(o, "30\n");
fprintf(o, "0.0\n");
// extents for draw space and line drawing...
// I will just use the data from the boundingbox (largest bbox value in all directions)
double emin = std::min(mp.bbox.min[0], std::min(mp.bbox.min[1], mp.bbox.min[2]));
double emax = std::max(mp.bbox.max[0], std::max(mp.bbox.max[1], mp.bbox.max[2]));
fprintf(o, "9\n");
fprintf(o, "$EXTMIN\n");
fprintf(o, "10\n");
fprintf(o, "%f\n",emin);
fprintf(o, "20\n");
fprintf(o, "%f\n",emin);
fprintf(o, "9\n");
fprintf(o, "$EXTMAX\n");
fprintf(o, "10\n");
fprintf(o, "%f\n", emax);
fprintf(o, "20\n");
fprintf(o, "%f\n", emax);
fprintf(o, "9\n");
fprintf(o, "$LINMIN\n");
fprintf(o, "10\n");
fprintf(o, "%f\n", emin);
fprintf(o, "20\n");
fprintf(o, "%f\n", emin);
fprintf(o, "9\n");
fprintf(o, "$LINMAX\n");
fprintf(o, "10\n");
fprintf(o, "%f\n", emax);
fprintf(o, "20\n");
fprintf(o, "%f\n", emax);
fprintf(o, "0\n");
fprintf(o, "ENDSEC\n");
return true;
}
}; // end class }; // end class