/// <summary>
/// Offset a curve on a brep face surface. This curve must lie on the surface.
/// <para>This overload allows to specify a surface point at which the offset will pass.</para>
/// </summary>
/// <param name="face">The brep face on which to offset.</param>
/// <param name="throughPoint">2d point on the brep face to offset through.</param>
/// <param name="fittingTolerance">A fitting tolerance.</param>
/// <returns>Offset curves on success, or null on failure.</returns>
/// <exception cref="ArgumentNullException">If face is null.</exception>
public Curve[] OffsetOnSurface(BrepFace face, Point2d throughPoint, double fittingTolerance)
{
if (face == null)
throw new ArgumentNullException("face");
int fid = face.m_index;
IntPtr pConstBrep = face.m_brep.ConstPointer();
SimpleArrayCurvePointer offsetCurves = new SimpleArrayCurvePointer();
IntPtr pCurveArray = offsetCurves.NonConstPointer();
IntPtr pConstCurve = ConstPointer();
int count = UnsafeNativeMethods.RHC_RhinoOffsetCurveOnSrf2(pConstCurve, pConstBrep, fid, throughPoint, fittingTolerance, pCurveArray);
Curve[] curves = offsetCurves.ToNonConstArray();
offsetCurves.Dispose();
if (count < 1)
return null;
return curves;
}
/// <summary>
/// Offset a curve on a brep face surface. This curve must lie on the surface.
/// <para>This overload allows to specify different offsets for different curve parameters.</para>
/// </summary>
/// <param name="face">The brep face on which to offset.</param>
/// <param name="curveParameters">Curve parameters corresponding to the offset distances.</param>
/// <param name="offsetDistances">distances to offset (+)left, (-)right.</param>
/// <param name="fittingTolerance">A fitting tolerance.</param>
/// <returns>Offset curves on success, or null on failure.</returns>
/// <exception cref="ArgumentNullException">If face, curveParameters or offsetDistances are null.</exception>
public Curve[] OffsetOnSurface(BrepFace face, double[] curveParameters, double[] offsetDistances, double fittingTolerance)
{
if (face == null) throw new ArgumentNullException("face");
if (curveParameters == null) throw new ArgumentNullException("curveParameters");
if (offsetDistances == null) throw new ArgumentNullException("offsetDistances");
int array_count = curveParameters.Length;
if (offsetDistances.Length != array_count)
throw new ArgumentException("curveParameters and offsetDistances must be the same length");
int fid = face.m_index;
IntPtr pConstBrep = face.m_brep.ConstPointer();
SimpleArrayCurvePointer offsetCurves = new SimpleArrayCurvePointer();
IntPtr pCurveArray = offsetCurves.NonConstPointer();
IntPtr pConstCurve = ConstPointer();
int count = UnsafeNativeMethods.RHC_RhinoOffsetCurveOnSrf3(pConstCurve, pConstBrep, fid, array_count, curveParameters, offsetDistances, fittingTolerance, pCurveArray);
Curve[] curves = offsetCurves.ToNonConstArray();
offsetCurves.Dispose();
if (count < 1)
return null;
return curves;
}
/// <summary>
/// Offsets this curve. If you have a nice offset, then there will be one entry in
/// the array. If the original curve had kinks or the offset curve had self
/// intersections, you will get multiple segments in the offset_curves[] array.
/// </summary>
/// <param name="directionPoint">A point that indicates the direction of the offset.</param>
/// <param name="normal">The normal to the offset plane.</param>
/// <param name="distance">The positive or negative distance to offset.</param>
/// <param name="tolerance">The offset or fitting tolerance.</param>
/// <param name="cornerStyle">Corner style for offset kinks.</param>
/// <returns>Offset curves on success, null on failure.</returns>
public Curve[] Offset(Point3d directionPoint, Vector3d normal, double distance, double tolerance, CurveOffsetCornerStyle cornerStyle)
{
IntPtr ptr = ConstPointer();
SimpleArrayCurvePointer offsetCurves = new SimpleArrayCurvePointer();
IntPtr pCurveArray = offsetCurves.NonConstPointer();
bool rc = UnsafeNativeMethods.RHC_RhinoOffsetCurve2(ptr, distance, directionPoint, normal, (int)cornerStyle, tolerance, pCurveArray);
Curve[] curves = offsetCurves.ToNonConstArray();
offsetCurves.Dispose();
if (!rc)
return null;
return curves;
}