Describes a circle in the plane (2D space). A circle is defined by its radius and positioned in the plane with a coordinate system (a gp_Ax22d object) as follows: - the origin of the coordinate system is the center of the circle, and - the orientation (direct or indirect) of the coordinate system gives an implicit orientation to the circle (and defines its trigonometric sense). This positioning coordinate system is the "local coordinate system" of the circle. Note: when a gp_Circ2d circle is converted into a Geom2d_Circle circle, some implicit properties of the circle are used explicitly: - the implicit orientation corresponds to the direction in which parameter values increase, - the starting point for parameterization is that of the "X Axis" of the local coordinate system (i.e. the "X Axis" of the circle). See Also GccAna and Geom2dGcc packages which provide functions for constructing circles defined by geometric constraints gce_MakeCirc2d which provides functions for more complex circle constructions Geom2d_Circle which provides additional functions for constructing circles and works, with the parametric equations of circles in particular gp_Ax22d 更多...
Public 成员函数 | |
| GCirc2d (global::System.IntPtr cPtr, bool cMemoryOwn) | |
| 仅供内部使用 | |
| void | Dispose () |
| GCirc2d () | |
| creates an indefinite circle. | |
| GCirc2d (GAx2d theXAxis, double theRadius, bool theIsSense) | |
| The location point of theXAxis is the center of the circle. Warnings : It is not forbidden to create a circle with theRadius = 0.0 Raises ConstructionError if theRadius < 0.0. Raised if theRadius < 0.0. | |
| GCirc2d (GAx2d theXAxis, double theRadius) | |
| The location point of theXAxis is the center of the circle. Warnings : It is not forbidden to create a circle with theRadius = 0.0 Raises ConstructionError if theRadius < 0.0. Raised if theRadius < 0.0. | |
| GCirc2d (GAx22d theAxis, double theRadius) | |
| theAxis defines the Xaxis and Yaxis of the circle which defines the origin and the sense of parametrization. The location point of theAxis is the center of the circle. Warnings : It is not forbidden to create a circle with theRadius = 0.0 Raises ConstructionError if theRadius < 0.0. Raised if theRadius < 0.0. | |
| void | SetLocation (GPnt2d theP) |
| Changes the location point (center) of the circle. | |
| void | SetXAxis (GAx2d theA) |
| Changes the X axis of the circle. | |
| void | SetAxis (GAx22d theA) |
| Changes the X axis of the circle. | |
| void | SetYAxis (GAx2d theA) |
| Changes the Y axis of the circle. | |
| void | SetRadius (double theRadius) |
| Modifies the radius of this circle. This class does not prevent the creation of a circle where theRadius is null. Exceptions Standard_ConstructionError if theRadius is negative. | |
| double | Area () |
| Computes the area of the circle. | |
| void | Coefficients (ref double theA, ref double theB, ref double theC, ref double theD, ref double theE, ref double theF) |
| Returns the normalized coefficients from the implicit equation of the circle : theA * (X**2) + theB * (Y**2) + 2*theC*(X*Y) + 2*theD*X + 2*theE*Y + theF = 0.0 | |
| bool | Contains (GPnt2d theP, double theLinearTolerance) |
| Does <me> contain theP ? Returns True if the distance between theP and any point on the circumference of the circle is lower of equal to <theLinearTolerance>. | |
| double | Distance (GPnt2d theP) |
| Computes the minimum of distance between the point theP and any point on the circumference of the circle. | |
| double | SquareDistance (GPnt2d theP) |
| Computes the square distance between <me> and the point theP. | |
| double | Length () |
| computes the circumference of the circle. | |
| GPnt2d | Location () |
| Returns the location point (center) of the circle. | |
| double | Radius () |
| Returns the radius value of the circle. | |
| GAx22d | Axis () |
| returns the position of the circle. | |
| GAx22d | Position () |
| returns the position of the circle. Idem Axis(me). | |
| GAx2d | XAxis () |
| returns the X axis of the circle. | |
| GAx2d | YAxis () |
| Returns the Y axis of the circle. Reverses the direction of the circle. | |
| void | Reverse () |
| Reverses the orientation of the local coordinate system of this circle (the "Y Direction" is reversed) and therefore changes the implicit orientation of this circle. Reverse assigns the result to this circle, | |
| GCirc2d | Reversed () |
| Reverses the orientation of the local coordinate system of this circle (the "Y Direction" is reversed) and therefore changes the implicit orientation of this circle. Reversed creates a new circle. | |
| bool | IsDirect () |
| Returns true if the local coordinate system is direct and false in the other case. | |
| void | Mirror (GPnt2d theP) |
| GCirc2d | Mirrored (GPnt2d theP) |
| Performs the symmetrical transformation of a circle with respect to the point theP which is the center of the symmetry | |
| void | Mirror (GAx2d theA) |
| GCirc2d | Mirrored (GAx2d theA) |
| Performs the symmetrical transformation of a circle with respect to an axis placement which is the axis of the symmetry. | |
| void | Rotate (GPnt2d theP, double theAng) |
| GCirc2d | Rotated (GPnt2d theP, double theAng) |
| Rotates a circle. theP is the center of the rotation. Ang is the angular value of the rotation in radians. | |
| void | Scale (GPnt2d theP, double theS) |
| GCirc2d | Scaled (GPnt2d theP, double theS) |
| Scales a circle. theS is the scaling value. Warnings : If theS is negative the radius stay positive but the "XAxis" and the "YAxis" are reversed as for an ellipse. | |
| void | Transform (GTrsf2d theT) |
| GCirc2d | Transformed (GTrsf2d theT) |
| Transforms a circle with the transformation theT from class Trsf2d. | |
| void | Translate (GVec2d theV) |
| GCirc2d | Translated (GVec2d theV) |
| Translates a circle in the direction of the vector theV. The magnitude of the translation is the vector's magnitude. | |
| void | Translate (GPnt2d theP1, GPnt2d theP2) |
| GCirc2d | Translated (GPnt2d theP1, GPnt2d theP2) |
| Translates a circle from the point theP1 to the point theP2. | |
详细描述
Describes a circle in the plane (2D space). A circle is defined by its radius and positioned in the plane with a coordinate system (a gp_Ax22d object) as follows: - the origin of the coordinate system is the center of the circle, and - the orientation (direct or indirect) of the coordinate system gives an implicit orientation to the circle (and defines its trigonometric sense). This positioning coordinate system is the "local coordinate system" of the circle. Note: when a gp_Circ2d circle is converted into a Geom2d_Circle circle, some implicit properties of the circle are used explicitly: - the implicit orientation corresponds to the direction in which parameter values increase, - the starting point for parameterization is that of the "X Axis" of the local coordinate system (i.e. the "X Axis" of the circle). See Also GccAna and Geom2dGcc packages which provide functions for constructing circles defined by geometric constraints gce_MakeCirc2d which provides functions for more complex circle constructions Geom2d_Circle which provides additional functions for constructing circles and works, with the parametric equations of circles in particular gp_Ax22d
