CurveRibbonOffset Method (Double, Double, Point3d, Vector3d, Double, Curve, Surface) |
Offsets a closed curve in the following way: pProject the curve to a plane with given normal.
Then, loose Offset the projection by distance + blend_radius and trim off self-intersection.
THen, Offset the remaining curve back in the opposite direction by blend_radius, filling gaps with blends.
Finally, use the elevations of the input curve to get the correct elevations of the result.
Namespace:
Rhino.Geometry
Assembly:
RhinoCommon (in RhinoCommon.dll)
Since: 7.0
Syntax public Curve RibbonOffset(
double distance,
double blendRadius,
Point3d directionPoint,
Vector3d normal,
double tolerance,
out Curve[] crossSections,
out Surface[] ruledSurfaces
)
Public Function RibbonOffset (
distance As Double,
blendRadius As Double,
directionPoint As Point3d,
normal As Vector3d,
tolerance As Double,
<OutAttribute> ByRef crossSections As Curve(),
<OutAttribute> ByRef ruledSurfaces As Surface()
) As Curve
Parameters
- distance
- Type: SystemDouble
The positive distance to offset the curve. - blendRadius
- Type: SystemDouble
Positive, typically the same as distance. When the offset results in a self-intersection
that gets trimmed off at a kink, the kink will be blended out using this radius.
- directionPoint
- Type: Rhino.GeometryPoint3d
A point that indicates the direction of the offset. If the offset is inward,
the point's projection to the plane should be well within the curve.
It will be used to decide which part of the offset to keep if there are self-intersections.
- normal
- Type: Rhino.GeometryVector3d
A vector that indicates the normal of the plane in which the offset will occur. - tolerance
- Type: SystemDouble
Used to determine self-intersections, not offset error. - crossSections
- Type: Rhino.GeometryCurve
Contains lines between input and the offset that might be useful
as input to Brep.CreateFromSweep or some other surface creation tool.
- ruledSurfaces
- Type: Rhino.GeometrySurface
Contain ruled surfaces between the input and the parts of the offset that correspond exactly.
Note, there will be gaps between these at blends.
Return Value
Type:
CurveThe offset curve if successful.
See Also