private IEnumerable <GeometryObject> Tessellate(Curve curve)
{
var result = new List <GeometryObject>();
// use the ASM tesselation of the curve
var pkg = renderPackageFactory.CreateRenderPackage();
curve.Tessellate(pkg, renderPackageFactory.TessellationParameters);
// get necessary info to enumerate and convert the lines
//var lineCount = pkg.LineVertexCount * 3 - 3;
var verts = pkg.LineStripVertices.ToList();
// we scale the tesselation rather than the curve
var conv = UnitConverter.DynamoToHostFactor(UnitType.UT_Length);
var scaledXYZs = new List <XYZ>();
for (var i = 0; i < verts.Count; i += 3)
{
scaledXYZs.Add(new XYZ(verts[i] * conv, verts[i + 1] * conv, verts[i + 2] * conv));
}
result.Add(PolyLine.Create(scaledXYZs));
return(result);
}
/// <summary>
/// Tessellate the curve:
/// 1). If there are more than 2 points, create a polyline out of the points;
/// 2). If there are exactly 2 points, create a line;
/// 3). If there's exception thrown during the tessellation process, attempt to create
/// a line from start and end points. If that fails, a point will be created instead.
/// </summary>
/// <param name="curve"></param>
/// <returns></returns>
private IEnumerable <GeometryObject> Tessellate(Curve curve)
{
var result = new List <GeometryObject>();
try
{
// we scale the tesselation rather than the curve
var conv = UnitConverter.DynamoToHostFactor(UnitType.UT_Length);
// use the ASM tesselation of the curve
var pkg = renderPackageFactory.CreateRenderPackage();
curve.Tessellate(pkg, renderPackageFactory.TessellationParameters);
// get necessary info to enumerate and convert the lines
//var lineCount = pkg.LineVertexCount * 3 - 3;
var verts = pkg.LineStripVertices.ToList();
if (verts.Count > 2)
{
var scaledXYZs = new List <XYZ>();
for (var i = 0; i < verts.Count; i += 3)
{
scaledXYZs.Add(new XYZ(verts[i] * conv, verts[i + 1] * conv, verts[i + 2] * conv));
}
result.Add(PolyLine.Create(scaledXYZs));
}
else if (verts.Count == 2)
{
result.Add(Line.CreateBound(curve.StartPoint.ToXyz(), curve.EndPoint.ToXyz()));
}
}
catch (Exception)
{
// Add a red bounding box geometry to identify that some errors occur
var bbox = curve.BoundingBox;
result.AddRange(ProtoToRevitMesh.CreateBoundingBoxMeshForErrors(bbox.MinPoint, bbox.MaxPoint));
try
{
result.Add(Line.CreateBound(curve.StartPoint.ToXyz(), curve.EndPoint.ToXyz()));
}
catch (Exception)
{
try
{
result.Add(DocumentManager.Instance.CurrentUIApplication.Application.Create.NewPoint(curve.StartPoint.ToXyz()));
}
catch (ArgumentException)
{
//if either the X, Y or Z of the point is infinite, no need to add it for preview
}
}
}
return(result);
}
