Struct representing a point in a 2 dimensional coordinate space. More...
#include <UTGeometry.h>
Public Member Functions | |
| Point_t () | |
| Point_t (float x, float y) | |
| Point_t (const Point_t ©) | |
| const Point_t & | operator= (const Point_t ©) |
| bool | operator== (const Point_t &other) const |
| bool | operator!= (const Point_t &other) const |
| Point_t | operator+ (const Point_t &add) const |
| Point_t | operator- (const Point_t &subtract) const |
| const Point_t & | operator+= (const Point_t &add) |
| const Point_t & | operator-= (const Point_t &subtract) |
Public Attributes | |
| float | x |
| float | y |
Struct representing a point in a 2 dimensional coordinate space. Although it can be used in other ways, the value space which is typically used is that for a monitor, with increasing x values to the right and increasing y values to the bottom. Floating point numbers are used by the UTgfx and UTgui libraries to represent screen display because for scaling, use of floating point computation until final conversion to an integer coordinate is more efficient than use of integers when scaling. That way the same interface can be used to render to the display, printer, and so on. Floats are accurate to within c_dbl_abs_min_denominator out to about 4,000,000.
Some related C API functionality for finding line intercepts is documented in the UTGeometry.h page.
Definition at line 93 of file UTGeometry.h.
| Point_t::Point_t | ( | ) | [inline] |
Constructor for an uninitialized point.
Definition at line 1301 of file UTGeometry.h.
| Point_t::Point_t | ( | float | x, | |
| float | y | |||
| ) | [inline] |
Initializer for a new point at a specific location.
Definition at line 1309 of file UTGeometry.h.
| Point_t::Point_t | ( | const Point_t & | copy | ) | [inline] |
Copy constructor.
Definition at line 1317 of file UTGeometry.h.
Assignment operator.
Definition at line 1325 of file UTGeometry.h.
| bool Point_t::operator== | ( | const Point_t & | other | ) | const |
Comparison operator. Because of possible floating point error, if the x and y coordinates are within c_dbl_compare_equality_threshold of each other, returns true. This is adequate for pixels. For very large values, a custom comparison function should be used.
| bool Point_t::operator!= | ( | const Point_t & | other | ) | const |
Comparison operator. Because of possible floating point error, if the x and y coordinates are within c_dbl_compare_equality_threshold of each other, returns false. This is adequate for pixels. For very large values, a custom comparison function should be used.
Adds the x and y values of two points in a new point.
Definition at line 1334 of file UTGeometry.h.
Subtracts the x and y values in subtract from the x and y values in the point on the left side of the expression, with the result in a new point.
Definition at line 1341 of file UTGeometry.h.
Adds the x and y values in add to the x and y values in this.
Definition at line 1348 of file UTGeometry.h.
Subtracts the x and y values in subtract from the x and y values in this.
Definition at line 1357 of file UTGeometry.h.
| float Point_t::x |
The coordinate value along the x axis.
Definition at line 114 of file UTGeometry.h.
| float Point_t::y |
The coordinate value along the y axis.
Definition at line 117 of file UTGeometry.h.
1.6.1