SkPoint Struct Reference
#include <SkPoint.h>
List of all members.
Public Member Functions |
void | set (SkScalar x, SkScalar y) |
void | iset (int32_t x, int32_t y) |
void | iset (const SkIPoint &p) |
SkScalar | length () const |
bool | normalize () |
bool | setNormalize (SkScalar x, SkScalar y) |
bool | setLength (SkScalar length) |
bool | setLength (SkScalar x, SkScalar y, SkScalar length) |
void | scale (SkScalar scale, SkPoint *dst) const |
void | scale (SkScalar value) |
void | rotateCW (SkPoint *dst) const |
void | rotateCW () |
void | rotateCCW (SkPoint *dst) const |
void | rotateCCW () |
void | negate () |
SkPoint | operator- () const |
void | operator+= (const SkPoint &v) |
void | operator-= (const SkPoint &v) |
bool | equals (SkScalar x, SkScalar y) const |
Static Public Member Functions |
static SkScalar | Length (SkScalar x, SkScalar y) |
static SkScalar | Distance (const SkPoint &a, const SkPoint &b) |
static SkScalar | DotProduct (const SkPoint &a, const SkPoint &b) |
static SkScalar | CrossProduct (const SkPoint &a, const SkPoint &b) |
Public Attributes |
SkScalar | fX |
SkScalar | fY |
Friends |
bool | operator== (const SkPoint &a, const SkPoint &b) |
bool | operator!= (const SkPoint &a, const SkPoint &b) |
SkPoint | operator- (const SkPoint &a, const SkPoint &b) |
SkPoint | operator+ (const SkPoint &a, const SkPoint &b) |
Detailed Description
Definition at line 122 of file SkPoint.h.
Member Function Documentation
Returns the cross product of a and b, treating them as 2D vectors
Definition at line 280 of file SkPoint.h.
Returns the euclidian distance between a and b
Definition at line 268 of file SkPoint.h.
Returns the dot product of a and b, treating them as 2D vectors
Definition at line 274 of file SkPoint.h.
Returns true if the point's coordinates equal (x,y)
Definition at line 235 of file SkPoint.h.
void SkPoint::iset |
( |
const SkIPoint & |
p |
) |
[inline] |
Set the point's X and Y coordinates by automatically promoting p's coordinates to SkScalar values.
Definition at line 139 of file SkPoint.h.
void SkPoint::iset |
( |
int32_t |
x, |
|
|
int32_t |
y | |
|
) |
| | [inline] |
Set the point's X and Y coordinates by automatically promoting (x,y) to SkScalar values.
Definition at line 131 of file SkPoint.h.
Returns the euclidian distance from (0,0) to (x,y)
SkScalar SkPoint::length |
( |
|
) |
const [inline] |
Return the euclidian distance from (0,0) to the point
Definition at line 146 of file SkPoint.h.
void SkPoint::negate |
( |
|
) |
[inline] |
Negate the point's coordinates
Definition at line 205 of file SkPoint.h.
bool SkPoint::normalize |
( |
|
) |
|
Set the point (vector) to be unit-length in the same direction as it currently is, and return its old length. If the old length is degenerately small (nearly zero), do nothing and return false, otherwise return true.
void SkPoint::operator+= |
( |
const SkPoint & |
v |
) |
[inline] |
Add v's coordinates to the point's
Definition at line 221 of file SkPoint.h.
SkPoint SkPoint::operator- |
( |
|
) |
const [inline] |
Returns a new point whose coordinates are the negative of the point's
Definition at line 212 of file SkPoint.h.
void SkPoint::operator-= |
( |
const SkPoint & |
v |
) |
[inline] |
Subtract v's coordinates from the point's
Definition at line 228 of file SkPoint.h.
void SkPoint::rotateCCW |
( |
|
) |
[inline] |
Rotate the point counter-clockwise by 90 degrees, writing the answer back into the point.
Definition at line 201 of file SkPoint.h.
void SkPoint::rotateCCW |
( |
SkPoint * |
dst |
) |
const |
Rotate the point counter-clockwise by 90 degrees, writing the answer into dst. It is legal for dst == this.
void SkPoint::rotateCW |
( |
|
) |
[inline] |
Rotate the point clockwise by 90 degrees, writing the answer back into the point.
Definition at line 191 of file SkPoint.h.
void SkPoint::rotateCW |
( |
SkPoint * |
dst |
) |
const |
Rotate the point clockwise by 90 degrees, writing the answer into dst. It is legal for dst == this.
void SkPoint::scale |
( |
SkScalar |
value |
) |
[inline] |
Scale the point's coordinates by scale, writing the answer back into the point.
Definition at line 181 of file SkPoint.h.
Scale the point's coordinates by scale, writing the answer into dst. It is legal for dst == this.
Set the point's X and Y coordinates
Definition at line 126 of file SkPoint.h.
Set the point (vector) to have the specified length in the same direction as (x,y). If the vector (x,y) has a degenerate length (i.e. nearly 0) then return false and do nothing, otherwise return true.
bool SkPoint::setLength |
( |
SkScalar |
length |
) |
|
Scale the point (vector) to have the specified length, and return that length. If the original length is degenerately small (nearly zero), do nothing and return false, otherwise return true.
Set the point (vector) to be unit-length in the same direction as the x,y params. If the vector (x,y) has a degenerate length (i.e. nearly 0) then return false and do nothing, otherwise return true.
Friends And Related Function Documentation
Returns a new point whose coordinates are the sum of a's and b's (a + b)
Definition at line 256 of file SkPoint.h.
Returns a new point whose coordinates are the difference between a's and b's (a - b)
Definition at line 248 of file SkPoint.h.
Member Data Documentation
The documentation for this struct was generated from the following file: