86 lines
2.3 KiB
JavaScript
86 lines
2.3 KiB
JavaScript
OV.ExporterStl = class extends OV.ExporterBase
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{
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constructor ()
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{
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super ();
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}
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CanExport (format, extension)
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{
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return (format === OV.FileFormat.Text || format === OV.FileFormat.Binary) && extension === 'stl';
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}
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ExportContent (model, format, files, onFinish)
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{
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if (format === OV.FileFormat.Text) {
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this.ExportText (model, files);
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} else {
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this.ExportBinary (model, files);
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}
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onFinish ();
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}
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ExportText (model, files)
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{
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let stlFile = new OV.ExportedFile ('model.stl');
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files.push (stlFile);
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let stlWriter = new OV.TextWriter ();
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stlWriter.WriteLine ('solid Model');
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OV.EnumerateTrianglesWithNormals (model, function (v0, v1, v2, normal) {
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stlWriter.WriteArrayLine (['facet', 'normal', normal.x, normal.y, normal.z]);
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stlWriter.Indent (1);
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stlWriter.WriteLine ('outer loop');
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stlWriter.Indent (1);
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stlWriter.WriteArrayLine (['vertex', v0.x, v0.y, v0.z]);
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stlWriter.WriteArrayLine (['vertex', v1.x, v1.y, v1.z]);
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stlWriter.WriteArrayLine (['vertex', v2.x, v2.y, v2.z]);
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stlWriter.Indent (-1);
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stlWriter.WriteLine ('endloop');
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stlWriter.Indent (-1);
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stlWriter.WriteLine ('endfacet');
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});
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stlWriter.WriteLine ('endsolid Model');
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stlFile.SetContent (stlWriter.GetText ());
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}
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ExportBinary (model, files)
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{
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let stlFile = new OV.ExportedFile ('model.stl');
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files.push (stlFile);
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let triangleCount = model.TriangleCount ();
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let headerSize = 80;
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let fullByteLength = headerSize + 4 + triangleCount * 50;
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let stlWriter = new OV.BinaryWriter (fullByteLength, true);
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for (let i = 0; i < headerSize; i++) {
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stlWriter.WriteUnsignedCharacter8 (0);
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}
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stlWriter.WriteUnsignedInteger32 (triangleCount);
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OV.EnumerateTrianglesWithNormals (model, function (v0, v1, v2, normal) {
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stlWriter.WriteFloat32 (normal.x);
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stlWriter.WriteFloat32 (normal.y);
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stlWriter.WriteFloat32 (normal.z);
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stlWriter.WriteFloat32 (v0.x);
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stlWriter.WriteFloat32 (v0.y);
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stlWriter.WriteFloat32 (v0.z);
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stlWriter.WriteFloat32 (v1.x);
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stlWriter.WriteFloat32 (v1.y);
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stlWriter.WriteFloat32 (v1.z);
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stlWriter.WriteFloat32 (v2.x);
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stlWriter.WriteFloat32 (v2.y);
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stlWriter.WriteFloat32 (v2.z);
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stlWriter.WriteUnsignedInteger16 (0);
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});
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stlFile.SetContent (stlWriter.GetBuffer ());
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}
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};
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