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IKO_gp_Cone Interface

Properties of a cone. To create this type of a circle use a call similar to iDIObjGenerator.Create3("KO_gp_Cone") where iDIObjGenerator has IDIObjGenerator type.

The cone is defined by its half-angle at the apex and positioned in space with a coordinate system (a gp_Ax3 object) and a "reference radius" where:
� the "main Axis" of the coordinate system is the axis of revolution of the cone,
� the plane defined by the origin, the "X Direction" and the "Y Direction" of the coordinate system is the reference plane of the cone; the intersection of the cone with this reference plane is a circle of radius equal to the reference radius, if the half-angle is positive, the apex of the cone is on the negative side of the "main Axis" of the coordinate system. If the half-angle is negative, the apex is on the positive side. This coordinate system is the "local coordinate system" of the cone. Note: when a gp_Cone cone is converted into a Geom_ConicalSurface cone, some implicit properties of its local coordinate system are used explicitly:
� its origin, "X Direction", "Y Direction" and "main
Direction" are used directly to define the parametric directions on the cone and the origin of the parameters,
� its implicit orientation (right-handed or left-handed) gives the orientation (direct or indirect) of the Geom_ConicalSurface cone. See Also gce_MakeCone which provides functions for more complex cone constructions Geom_ConicalSurface which provides additional functions for constructing cones and works, in particular, with the parametric equations of cones gp_Ax3

Query IKO_gp_Object from this interface to obtain or modify location and orientation of the plane

Query IKO_gp_Transformation to transform position and orientation

IKO_Standard_Object to create a copy or obtain type name

Init

SetRadius

SetSemiAngle

Apex

Coefficients

RefRadius

SemiAngle

HRESULT Init(IKO_gp_Ax3* A3, double Ang, double Radius)

Creates an infinite conical surface. A3 locates the cone in the space and defines the reference plane of the surface. Ang is the conical surface semi-angle between 0 and PI/2 radians. Radius is the radius of the circle in the reference plane of the cone. Raises ConstructionError . if Radius is lower than 0.0 . Ang < Resolution from gp or Ang >= (PI/2) - Resolution.

HRESULT SetRadius(double R)

HRESULT SetSemiAngle(double Ang)

HRESULT Apex(DIPoint* P)

Returns the cone's top. The Apex of the cone is on the negative side of the symmetry axis of the cone.

HRESULT Coefficients(double* A1, double* A2, double* A3, double* B1, double* B2, double* B3, double* C1, double* C2, double* C3, double* D)

Computes the coefficients of the implicit equation of the quadric in the absolute cartesian coordinates system : A1.X**2 + A2.Y**2 + A3.Z**2 + 2.(B1.X.Y + B2.X.Z + B3.Y.Z) + 2.(C1.X + C2.Y + C3.Z) + D = 0.0

HRESULT RefRadius(double* retVal)

Returns the radius of the cone in the reference plane

HRESULT SemiAngle(double* retVal)

Returns the half-angle at the apex of this cone