/// <summary>
/// 将Mesh转化为PolySurface
/// </summary>
/// <param name="mesh">网格</param>
/// <returns>转化后的PolySurface</returns>
public static PolySurface ConvertToPolySurface(Mesh mesh)
{
List <Surface> surfaces = new List <Surface>();
Point[] vertexs = mesh.VertexPositions;
IndexGroup[] indexGroup = mesh.FaceIndices;
foreach (var item in indexGroup)
{
if (item.Count == 3)
{
Point pt1 = vertexs[item.A];
Point pt2 = vertexs[item.B];
Point pt3 = vertexs[item.C];
Surface surface = Surface.ByPerimeterPoints(new Point[] { pt1, pt2, pt3 });
surfaces.Add(surface);
pt1.Dispose();
pt2.Dispose();
pt3.Dispose();
surface.Dispose();
}
else
{
Point pt1 = vertexs[item.A];
Point pt2 = vertexs[item.B];
Point pt3 = vertexs[item.C];
Point pt4 = vertexs[item.D];
Surface surface = Surface.ByPerimeterPoints(new Point[] { pt1, pt2, pt3, pt4 });
surfaces.Add(surface);
pt1.Dispose();
pt2.Dispose();
pt3.Dispose();
surface.Dispose();
}
}
return(PolySurface.ByJoinedSurfaces(surfaces));
}
public static Dictionary <string, object> SortAlongCurve(List <Point> points, Curve curve, bool reverse = false)
{
List <Point> closePoints = new List <Point>();
List <double> closeParam = new List <double>();
List <double> otherParam = new List <double>();
List <int> indices = new List <int>();
int n = 0;
foreach (var pt in points)
{
Point point = curve.ClosestPointTo(pt);
double param = curve.ParameterAtPoint(point);
closePoints.Add(point);
closeParam.Add(param);
otherParam.Add(param);
indices.Add(n);
n++;
point.Dispose();
}
Point[] outPoints = points.ToArray();
double[] keys = closeParam.ToArray();
double[] keys2 = otherParam.ToArray();
int[] outIndices = indices.ToArray();
Array.Sort <double, Point>(keys, outPoints);
Array.Sort <double, int>(keys2, outIndices);
if (reverse)
{
Array.Reverse(outPoints);
Array.Reverse(outIndices);
}
return(new Dictionary <string, object>
{
{ "Points", outPoints },
{ "Indices", outIndices }
});
}