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C# Autodesk.get_Tangents方法代码示例

本文整理汇总了C#中Autodesk.get_Tangents方法的典型用法代码示例。如果您正苦于以下问题:C# Autodesk.get_Tangents方法的具体用法?C# Autodesk.get_Tangents怎么用?C# Autodesk.get_Tangents使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在Autodesk的用法示例。


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示例1: ExtractSurface

        public static Surface ExtractSurface(Autodesk.Revit.DB.HermiteFace face, IEnumerable<PolyCurve> edgeLoops)
        {
            // The number of interpolating points in the u direction is given by get_Params
            var uParams = face.get_Params(0).Cast<double>().ToArray();
            var vParams = face.get_Params(1).Cast<double>().ToArray();

            var numU = uParams.Length;
            var numV = vParams.Length;

            // unpack the points
            var points = face.Points;
           
            // structure the points as 2d array - numU x numV
            var ptArr = new Autodesk.DesignScript.Geometry.Point[numV][];
            var count = 0;
            for (var i = 0; i < numV; i++)
            {
                ptArr[i] = new Autodesk.DesignScript.Geometry.Point[numU];

                for (var j = 0; j < numU; j++)
                {
                    ptArr[i][j] = points[count++].ToPoint(false);
                }
            }

            // unpack the tangents
            var uTangents = face.get_Tangents(0);
            var vTangents = face.get_Tangents(1);

            // structure the tangents as 2d array - numU x numV
            var uTangentsArr = new Vector[numV][];
            var vTangentsArr = new Vector[numV][];

            count = 0;
            for (var i = 0; i < numV; i++)
            {
                uTangentsArr[i] = new Vector[numU];
                vTangentsArr[i] = new Vector[numU];

                for (var j = 0; j < numU; j++)
                {
                    uTangentsArr[i][j] = uTangents[count].ToVector(false);
                    vTangentsArr[i][j] = vTangents[count].ToVector(false);
                    count++;
                }
            }

            // u tangents run in increasing column direction
            var uStartTangents = uTangentsArr.Select(x => x[0]).ToArray();
            var uEndTangents = uTangentsArr.Select(x => x[numU - 1]).ToArray();

            // v tangents run in increasing row direction
            var vStartTangents = vTangentsArr[0];
            var vEndTangents = vTangentsArr[numV-1];

            // The mixed derivs are the twist vectors - dP / dUdV
            var md = face.MixedDerivs;
            Vector[] mds =
            {
                md[0].ToVector(false), 
                md[numU - 1].ToVector(false), 
                md[(md.Count - 1) - (numU-1)].ToVector(false),
                md[md.Count - 1].ToVector(false)
            };

            return NurbsSurface.ByPointsTangentsKnotsDerivatives(   ptArr, 
                                                                    uStartTangents, 
                                                                    uEndTangents, 
                                                                    vStartTangents, 
                                                                    vEndTangents,
                                                                    HermiteToNurbs.Clamp(uParams),
                                                                    HermiteToNurbs.Clamp(vParams), 
                                                                    mds);

        }
开发者ID:RobertiF,项目名称:Dynamo,代码行数:75,代码来源:SurfaceExtractor.cs


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