96 lines
2.6 KiB
JavaScript
96 lines
2.6 KiB
JavaScript
OV.ExporterPly = 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 === 'ply';
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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 plyFile = new OV.ExportedFile ('model.ply');
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files.push (plyFile);
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let plyWriter = new OV.TextWriter ();
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let vertexCount = model.VertexCount ();
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let triangleCount = model.TriangleCount ();
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let headerText = this.GetHeaderText ('ascii', vertexCount, triangleCount);
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plyWriter.Write (headerText);
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OV.EnumerateModelVerticesAndTriangles (model, {
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onVertex : function (x, y, z) {
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plyWriter.WriteArrayLine ([x, y, z]);
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},
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onTriangle : function (v0, v1, v2) {
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plyWriter.WriteArrayLine ([3, v0, v1, v2]);
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}
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});
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plyFile.SetContent (plyWriter.GetText ());
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}
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ExportBinary (model, files)
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{
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let plyFile = new OV.ExportedFile ('model.ply');
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files.push (plyFile);
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let vertexCount = model.VertexCount ();
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let triangleCount = model.TriangleCount ();
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let headerText = this.GetHeaderText ('binary_little_endian', vertexCount, triangleCount);
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let fullByteLength = headerText.length + vertexCount * 3 * 4 + triangleCount * (1 + 3 * 4);
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let plyWriter = new OV.BinaryWriter (fullByteLength, true);
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for (let i = 0; i < headerText.length; i++) {
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plyWriter.WriteUnsignedCharacter8 (headerText.charCodeAt (i));
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}
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OV.EnumerateModelVerticesAndTriangles (model, {
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onVertex : function (x, y, z) {
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plyWriter.WriteFloat32 (x);
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plyWriter.WriteFloat32 (y);
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plyWriter.WriteFloat32 (z);
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},
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onTriangle : function (v0, v1, v2) {
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plyWriter.WriteUnsignedCharacter8 (3);
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plyWriter.WriteInteger32 (v0);
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plyWriter.WriteInteger32 (v1);
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plyWriter.WriteInteger32 (v2);
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}
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});
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plyFile.SetContent (plyWriter.GetBuffer ());
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}
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GetHeaderText (format, vertexCount, triangleCount)
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{
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let headerWriter = new OV.TextWriter ();
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headerWriter.WriteLine ('ply');
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headerWriter.WriteLine ('format ' + format + ' 1.0');
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headerWriter.WriteLine ('element vertex ' + vertexCount);
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headerWriter.WriteLine ('property float x');
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headerWriter.WriteLine ('property float y');
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headerWriter.WriteLine ('property float z');
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headerWriter.WriteLine ('element face ' + triangleCount);
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headerWriter.WriteLine ('property list uchar int vertex_index');
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headerWriter.WriteLine ('end_header');
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return headerWriter.GetText ();
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}
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};
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