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namespace Oni.Motoko |
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{ |
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internal class GeometryDatWriter |
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{ |
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private Geometry geometry; |
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private ImporterFile importer; |
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|
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public static ImporterDescriptor Write(Geometry geometry, ImporterFile importer) |
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{ |
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var writer = new GeometryDatWriter |
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{ |
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geometry = geometry, |
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importer = importer |
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}; |
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|
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return writer.WriteGeometry(); |
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} |
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|
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private ImporterDescriptor WriteGeometry() |
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{ |
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var triangleStrips = Stripify.FromTriangleList(geometry.Triangles); |
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var triangleList = Stripify.ToTriangleList(triangleStrips); |
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|
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var faceNormals = new Vector3[triangleList.Length / 3]; |
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var faceIndices = new int[faceNormals.Length]; |
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|
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for (int i = 0; i < triangleList.Length; i += 3) |
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{ |
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var p0 = geometry.Points[triangleList[i + 0]]; |
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var p1 = geometry.Points[triangleList[i + 1]]; |
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var p2 = geometry.Points[triangleList[i + 2]]; |
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|
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var faceNormal = Vector3.Normalize(Vector3.Cross(p1 - p0, p2 - p0)); |
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int faceIndex = i / 3; |
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|
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faceNormals[faceIndex] = faceNormal; |
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faceIndices[faceIndex] = faceIndex; |
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} |
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|
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var m3gm = importer.CreateInstance(TemplateTag.M3GM, geometry.Name); |
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var pnta = importer.CreateInstance(TemplateTag.PNTA); |
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var vcra1 = importer.CreateInstance(TemplateTag.VCRA); |
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var vcra2 = importer.CreateInstance(TemplateTag.VCRA); |
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var txca = importer.CreateInstance(TemplateTag.TXCA); |
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var idxa1 = importer.CreateInstance(TemplateTag.IDXA); |
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var idxa2 = importer.CreateInstance(TemplateTag.IDXA); |
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|
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using (var writer = m3gm.OpenWrite(4)) |
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{ |
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writer.Write(pnta); |
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writer.Write(vcra1); |
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writer.Write(vcra2); |
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writer.Write(txca); |
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writer.Write(idxa1); |
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writer.Write(idxa2); |
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|
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if (geometry.TextureName != null) |
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writer.Write(importer.CreateInstance(TemplateTag.TXMP, geometry.TextureName)); |
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else |
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writer.Write(0); |
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|
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writer.Skip(4); |
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} |
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|
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pnta.WritePoints(geometry.Points); |
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vcra1.WriteVectors(geometry.Normals); |
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vcra2.WriteVectors(faceNormals); |
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txca.WriteTexCoords(geometry.TexCoords); |
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idxa1.WriteIndices(triangleStrips); |
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idxa2.WriteIndices(faceIndices); |
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|
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return m3gm; |
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} |
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} |
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} |
