Circle Class Reference
An Object representing a circle. More...Inheritance diagram for Circle:
Public Member Functions | |
| Circle (const Coordinate ¢er, double radius) | |
| Construct a Circle with a given center and radius. | |
| Circle * | copy () const |
| Returns a copy of this Object. | |
| Object * | transform (const Transformation &) const |
| Return this Object, transformed by the transformation t. | |
| bool | valid () const |
| Returns true if this is a valid Object. | |
| const ObjectType * | type () const |
| Returns the lowermost ObjectType that this object is an instantiation of. | |
| const Coordinate | center () const |
| Return the center of this circle. | |
| double | radius () const |
| Return the radius of this circle. | |
| double | squareRadius () const |
| Return the square radius of this circle. | |
| double | surface () const |
| Return the surface of this circle. | |
| double | circumference () const |
| Return the circumference of this circle. | |
| int | conicType () const |
| Always returns 1, since a circle always is an ellipse. | |
| const ConicCartesianData | cartesianData () const |
| Return the cartesian representation of this conic. | |
| const ConicPolarData | polarData () const |
| Return the polar representation of this conic. | |
| Coordinate | focus1 () const |
| The first focus of a circle is simply its center. | |
| Coordinate | focus2 () const |
| The second focus of a circle is simply its center. | |
| QString | cartesianEquationString (const KigDocument &w) const |
| Return a string containing the cartesian equation of this circle. | |
| QString | simplyCartesianEquationString (const KigDocument &w) const |
| Return a string containing the cartesian equation of this circle. | |
| QString | polarEquationString (const KigDocument &w) const |
| Return a string containing the polar equation of this circle. | |
| bool | equals (const Object &rhs) const |
| Returns true if this Object is equal to rhs. | |
Static Public Member Functions | |
| static const ObjectType * | stype () |
| Returns the ObjectType representing the Circle type. | |
Detailed Description
An Object representing a circle.This class is a subclass of Conic, ensuring that a circle can be used as a conic.
Member Function Documentation
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Return a string containing the cartesian equation of this circle. This will be of the form "x^2 + y^2 + a x + b y + c = 0" Reimplemented from Conic. |
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Returns a copy of this Object. The copy is an exact copy. Changes to the copy don't affect the original. Implements Curve. |
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Returns true if this Object is equal to rhs. This function checks whether rhs is of the same Object type, and whether it contains the same data as this Object. Reimplemented from Conic. |
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Return a string containing the polar equation of this circle. This will be of the form "rho = r [centered at p]" Reimplemented from Conic. |
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Return a string containing the cartesian equation of this circle. This will be of the form "( x - x0 )^2 + ( y - y0 )^2 = r^2" |
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Return the square radius of this circle. Use this in preference to sqr( radius() ). |
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Returns the ObjectType representing the Circle type.
Reimplemented from Conic. |
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Returns the lowermost ObjectType that this object is an instantiation of. E.g. if you want to get a string containing the internal name of the type of an object, you can do:
tn = object.type().internalName() Reimplemented from Conic. |
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Returns true if this is a valid Object. If you want to return an invalid Object, you should return an InvalidObject instance. Reimplemented from Conic. |
