ISurfaceEntity

public interface ISurfaceEntity : ITopologyEntity, IGeometryEntity, IDesignScriptEntity, IDisposable, ITransformableEntity

double Area { get; }

Returns the total surface area.

bool Closed { get; }

Returns true if the Surface is closed in U or V directions

bool ClosedInU { get; }

Returns true if the Surface is closed in U direction.

bool ClosedInV { get; }

Returns true if the Surface is closed in V direction

double Perimeter { get; }

Returns the sum of all edges of the Surface.

INurbsSurfaceEntity ApproximateWithTolerance(double tolerance = 0.001)

Gets a Nurbs representation of the Surface within a specified tolerance. This method may approximate Surface in certain circumstances.

ICoordinateSystemEntity CoordinateSystemAtParameter(double u = 0, double v = 0)

Return a CoordinateSystem aligned with principal curvature directions.

ICoordinateSystemEntity CurvatureAtParameter(double u = 0, double v = 0)

The returned coordination system use xAxis, yAxis and zAxis to represent the uDir, vDir and normal. The length of xAxis, yAxis represents the curvatures.

IVectorEntity[] DerivativesAtParameter(double u = 0, double v = 0)

Return the derivatives at input U and V coordinates.

ISurfaceEntity FlipNormalDirection()

Returns a new Surface with the Normal flipped. Leaves this surface unchanged.

double GaussianCurvatureAtParameter(double u = 0, double v = 0)

Returns the Gaussian curvature at U and V parameters.

ICurveEntity GetIsoline(int isoDirection = 0, double parameter = 0)

Create a parameter line curve on the given surface. Create a Curve that represents a u or v parameter line on the Surface. A parameter line runs in the direction of increasing u or v parameter at a constant opposite u or v parameter. The resulting Curve will match the Surface parameterisation and its range will be bounded by the Surface parameter range. The type of Curve returned will depend on the Surface type.

IPolySurfaceEntity Join(ISurfaceEntity otherSurface)

Combines this Surface and input Surface into a PolySurface

IPolySurfaceEntity Join(ISurfaceEntity[] otherSurfaces)

Combines this Surface and input Surfaces into a PolySurface

IVectorEntity NormalAtParameter(double u = 0, double v = 0)

Return the normal Vector at specified U and V parameters.

IVectorEntity NormalAtPoint(IPointEntity point)

Return the surface normal at the input Point on the Surface.

ISurfaceEntity Offset(double distance = 1)

Offset Surface in direction of Surface normal by specified distance.

ICurveEntity[] PerimeterCurves()

Return all the boundary Curves of the Surface.