Björn Steinhagen
83 lines
2.4 KiB
C#
83 lines
2.4 KiB
C#
using Autodesk.Revit.DB;
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namespace Speckle.Converters.RevitShared.Helpers;
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/// <summary>
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/// Helper class for working with transform data coming from reference point setting
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/// This allows preserving the reference point information between operations.
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/// </summary>
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public static class ReferencePointHelper
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{
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public const string REFERENCE_POINT_TRANSFORM_KEY = "referencePointTransform";
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/// <summary>
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/// Changes Revit Transform to a double array.
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/// Uses a 16-element column-major matrix representation. See https://speckle.guide/dev/objects.html
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/// </summary>
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public static Dictionary<string, object> CreateTransformDataForRootObject(Transform transform)
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{
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return new Dictionary<string, object>
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{
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{
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"transform", // TODO: it would also be nice to include the key-value pair for reference point type as a string
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new[]
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{
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transform.BasisX.X,
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transform.BasisX.Y,
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transform.BasisX.Z,
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0,
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transform.BasisY.X,
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transform.BasisY.Y,
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transform.BasisY.Z,
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0,
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transform.BasisZ.X,
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transform.BasisZ.Y,
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transform.BasisZ.Z,
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0,
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transform.Origin.X,
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transform.Origin.Y,
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transform.Origin.Z,
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1
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}
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}
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};
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}
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/// <summary>
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/// Extracts and reconstructs a transform from the matrix data stored on root object
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/// </summary>
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public static Transform? GetTransformFromRootObject(object? matrixDataObj)
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{
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double[]? matrixData = null;
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// NOTE: why all these if checks? We send double[] but get List<object> back on receive, so need to convert
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if (matrixDataObj is double[] doubleArray)
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{
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matrixData = doubleArray;
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}
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else if (matrixDataObj is List<object> listValues)
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{
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matrixData = listValues.Select(v => Convert.ToDouble(v)).ToArray();
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}
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if (matrixData == null || matrixData.Length != 16)
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{
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return null;
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}
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// Extract components from the matrix
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XYZ basisX = new(matrixData[0], matrixData[1], matrixData[2]);
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XYZ basisY = new(matrixData[4], matrixData[5], matrixData[6]);
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XYZ basisZ = new(matrixData[8], matrixData[9], matrixData[10]);
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XYZ origin = new(matrixData[12], matrixData[13], matrixData[14]);
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Transform transform = Transform.Identity;
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transform.Origin = origin;
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transform.BasisX = basisX;
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transform.BasisY = basisY;
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transform.BasisZ = basisZ;
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return transform;
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}
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}
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