KDE API Referencekig
#include <coordinate.h>
Public Member Functions | |
| Coordinate (double x, double y) | |
| Coordinate (const Coordinate &p) | |
| Coordinate () | |
| ~Coordinate () | |
| double | distance (const Coordinate &p) const |
| double | length () const |
| const Coordinate | normalize (double length=1) const |
| Coordinate & | operator*= (double r) |
| Coordinate & | operator*= (int r) |
| Coordinate & | operator+= (const Coordinate &c) |
| const Coordinate | operator- () const |
| Coordinate & | operator-= (const Coordinate &c) |
| Coordinate & | operator/= (double r) |
| Coordinate & | operator= (const Coordinate &c) |
| const Coordinate | orthogonal () const |
| const Coordinate | round () const |
| double | squareLength () const |
| QPoint | toQPoint () const |
| bool | valid () const |
Static Public Member Functions | |
| static Coordinate | fromQPoint (const QPoint &p) |
| static Coordinate | invalidCoord () |
Public Attributes | |
| double | x |
| double | y |
Friends | |
| bool | operator!= (const Coordinate &, const Coordinate &) |
| const Coordinate | operator* (const Coordinate &a, double r) |
| double | operator* (const Coordinate &a, const Coordinate &b) |
| const Coordinate | operator+ (const Coordinate &a, const Coordinate &b) |
| const Coordinate | operator- (const Coordinate &a, const Coordinate &b) |
| const Coordinate | operator/ (const Coordinate &a, double r) |
| QDebug & | operator<< (QDebug &s, const Coordinate &t) |
| bool | operator== (const Coordinate &, const Coordinate &) |
Detailed Description
The Coordinate class is the basic class representing a 2D location by its x and y components.
It has all relevant arithmetic operators properly defined, and should be straightforward to use..
Definition at line 33 of file coordinate.h.
Constructor & Destructor Documentation
| Coordinate::Coordinate | ( | double | x, |
| double | y | ||
| ) |
Constructor.
Construct a new Coordinate, with a given x and y value.
Definition at line 80 of file coordinate.cpp.
| Coordinate::Coordinate | ( | const Coordinate & | p | ) |
Copy Constructor.
Construct a new Coordinate, and give it the same value as p.
Definition at line 86 of file coordinate.cpp.
| Coordinate::Coordinate | ( | ) |
Default Constructor.
Constructs a new Coordinate, with x and y initialized to 0.
Definition at line 74 of file coordinate.cpp.
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inline |
Definition at line 54 of file coordinate.h.
Member Function Documentation
| double Coordinate::distance | ( | const Coordinate & | p | ) | const |
Distance to another Coordinate.
Definition at line 139 of file coordinate.cpp.
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static |
Definition at line 28 of file coordinate.cpp.
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static |
Create an invalid Coordinate.
This is a special value of a Coordinate that signals that something went wrong..
- See also
- Coordinate::valid
We represent an invalid coordinate by setting x or y to positive or negative infinity. This is handy, since it doesn't require us to adapt most of the functions, it doesn't need extra space, and most of the times that we should get an invalid coord, we get one automatically..
Definition at line 171 of file coordinate.cpp.
| double Coordinate::length | ( | ) | const |
Length.
Returns the length or norm of this coordinate. I.e. return the distance from this Coordinate to the origin.
- See also
- squareLength
Definition at line 144 of file coordinate.cpp.
| const Coordinate Coordinate::normalize | ( | double | length = 1 | ) | const |
Normalize.
This sets the length to length, while keeping the x/y ratio untouched...
Definition at line 154 of file coordinate.cpp.
| Coordinate & Coordinate::operator*= | ( | double | r | ) |
| Coordinate & Coordinate::operator*= | ( | int | r | ) |
| Coordinate & Coordinate::operator+= | ( | const Coordinate & | c | ) |
| const Coordinate Coordinate::operator- | ( | ) | const |
| Coordinate & Coordinate::operator-= | ( | const Coordinate & | c | ) |
| Coordinate & Coordinate::operator/= | ( | double | r | ) |
| Coordinate & Coordinate::operator= | ( | const Coordinate & | c | ) |
Definition at line 97 of file coordinate.cpp.
| const Coordinate Coordinate::orthogonal | ( | ) | const |
Orthogonal.
Returns a vector which is orthogonal on this vector. This relation always holds:
Coordinate a = ...; assert( a*a.orthogonal() ) == 0;
Definition at line 149 of file coordinate.cpp.
| const Coordinate Coordinate::round | ( | ) | const |
Round.
Returns this coordinate, rounded to the nearest integral values.
Definition at line 160 of file coordinate.cpp.
|
inline |
Square length.
Equivalent to the square of length, but a bit more efficient because no square root has to be calculated.
- See also
- length
Definition at line 163 of file coordinate.h.
| QPoint Coordinate::toQPoint | ( | ) | const |
Definition at line 165 of file coordinate.cpp.
| bool Coordinate::valid | ( | ) | const |
Return whether this is a valid Coordinate.
- See also
- Coordinate::invalidCoord
Definition at line 176 of file coordinate.cpp.
Friends And Related Function Documentation
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friend |
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friend |
|
friend |
Scalar Product.
Returns the scalar product of a and b.
Definition at line 181 of file coordinate.cpp.
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friend |
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friend |
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friend |
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friend |
Definition at line 33 of file coordinate.cpp.
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friend |
Member Data Documentation
| double Coordinate::x |
| double Coordinate::y |
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