/// <summary>
/// Extends a curve until it intersects a collection of objects.
/// </summary>
/// <param name="side">The end of the curve to extend.</param>
/// <param name="style">The style or type of extension to use.</param>
/// <param name="geometry">A collection of objects. Allowable object types are Curve, Surface, Brep.</param>
/// <returns>New extended curve result on success, null on failure.</returns>
public Curve Extend(CurveEnd side, CurveExtensionStyle style, System.Collections.Generic.IEnumerable<GeometryBase> geometry)
{
if (CurveEnd.None == side)
return null;
int _side = 0;
if (CurveEnd.End == side)
_side = 1;
else if (CurveEnd.Both == side)
_side = 2;
IntPtr pConstPtr = ConstPointer();
using (SimpleArrayGeometryPointer geometryArray = new SimpleArrayGeometryPointer(geometry))
{
IntPtr geometryArrayPtr = geometryArray.ConstPointer();
int extendStyle = idxExtendTypeLine;
if (style == CurveExtensionStyle.Arc)
extendStyle = idxExtendTypeArc;
else if (style == CurveExtensionStyle.Smooth)
extendStyle = idxExtendTypeSmooth;
IntPtr rc = UnsafeNativeMethods.RHC_RhinoExtendCurve1(pConstPtr, extendStyle, _side, geometryArrayPtr);
return GeometryBase.CreateGeometryHelper(rc, null) as Curve;
}
}
/// <summary>
/// Finds the object (and the closest point in that object) that is closest to
/// this curve. <para><see cref="Brep">Breps</see>, <see cref="Surface">surfaces</see>,
/// <see cref="Curve">curves</see> and <see cref="PointCloud">point clouds</see> are examples of
/// objects that can be passed to this function.</para>
/// </summary>
/// <param name="geometry">A list, an array or any enumerable set of geometry to search.</param>
/// <param name="pointOnCurve">The point on curve. This out parameter is assigned during this call.</param>
/// <param name="pointOnObject">The point on geometry. This out parameter is assigned during this call.</param>
/// <param name="whichGeometry">The index of the geometry. This out parameter is assigned during this call.</param>
/// <param name="maximumDistance">Maximum allowable distance. Past this distance, the research is given up and false is returned.</param>
/// <returns>true on success; false if no object was found or selected.</returns>
/// <exception cref="ArgumentNullException">If geometry is null.</exception>
public bool ClosestPoints(IEnumerable<GeometryBase> geometry,
out Point3d pointOnCurve,
out Point3d pointOnObject,
out int whichGeometry,
double maximumDistance)
{
if (geometry == null) throw new ArgumentNullException("geometry");
using (SimpleArrayGeometryPointer geom = new SimpleArrayGeometryPointer(geometry))
{
pointOnCurve = Point3d.Unset;
pointOnObject = Point3d.Unset;
IntPtr pConstThis = ConstPointer();
IntPtr pGeometryArray = geom.ConstPointer();
whichGeometry = 0;
bool rc = UnsafeNativeMethods.RHC_RhinoGetClosestPoint(pConstThis, pGeometryArray, maximumDistance, ref pointOnCurve, ref pointOnObject, ref whichGeometry);
return rc;
}
}
