Class PointUtil

Provides helper methods for manipulations with points

Inheritance

java.lang.Object

PointUtil

Inherited Members

Object.clone()

Object.equals(Object)

Object.finalize()

Object.getClass()

Object.hashCode()

Object.notify()

Object.notifyAll()

Object.toString()

Object.wait()

Object.wait(long)

Object.wait(long,int)

Namespace:

Assembly: .dll

Syntax

public class PointUtil

Constructors

PointUtil()

Declaration

public PointUtil()

Methods

arePointsOnSameLine(PointF pt1, PointF pt2, PointF pt3)

Checks if points lies on the same line

Declaration

public static boolean arePointsOnSameLine(PointF pt1, PointF pt2, PointF pt3)

Parameters

Type	Name	Description
android.graphics.PointF	pt1	The first point to check
android.graphics.PointF	pt2	The second point to check
android.graphics.PointF	pt3	The third point to check

Returns

Type	Description
boolean	True if points lie on the same line

clipToBounds(PointF point, int width, int height)

Clip point to the bounds

Declaration

public static void clipToBounds(PointF point, int width, int height)

Parameters

Type	Name	Description
android.graphics.PointF	point	The point to clip
int	width	The bounds width
int	height	The bounds height

distance(PointF pt1, PointF pt2)

Calculates distance between two points

Declaration

public static float distance(PointF pt1, PointF pt2)

Parameters

Type	Name	Description
android.graphics.PointF	pt1	The first point
android.graphics.PointF	pt2	The second point

Returns

Type	Description
float	The distance between points

distance(float x1, float y1, float x2, float y2)

Calculates distance between two points

Declaration

public static float distance(float x1, float y1, float x2, float y2)

Parameters

Type	Name	Description
float	x1	The x-coordinate of the first point
float	y1	The y-coordinate of the first point
float	x2	The x-coordinate of the second point
float	y2	The y-coordinate of the second point

Returns

Type	Description
float	The distance between points

distanceFromLine(PointF pt, PointF start, PointF end)

Computes the distance from line to point

Declaration

public static float distanceFromLine(PointF pt, PointF start, PointF end)

Parameters

Type	Name	Description
android.graphics.PointF	pt	The point measure distance from
android.graphics.PointF	start	The line start
android.graphics.PointF	end	The line end

Returns

Type	Description
float	The distance from line to point

distanceFromLine(float x, float y, float startX, float startY, float endX, float endY)

Computes the distance from line to point

Declaration

public static float distanceFromLine(float x, float y, float startX, float startY, float endX, float endY)

Parameters

Type	Name	Description
float	x	The x-coordinate of the point to measure distance from
float	y	The y-coordinate of the point to measure distance from
float	startX	The x-coordinate of the line start
float	startY	The y-coordinate of the line start
float	endX	The x-coordinate of the line end
float	endY	The y-coordinate of the line end

Returns

Type	Description
float	The distance from line to point

distanceFromLineSegment(PointF pt, PointF start, PointF end)

Computes the distance from line to point

Declaration

public static float distanceFromLineSegment(PointF pt, PointF start, PointF end)

Parameters

Type	Name	Description
android.graphics.PointF	pt	The point measure distance from
android.graphics.PointF	start	The line start
android.graphics.PointF	end	The line end

Returns

Type	Description
float	The distance from line to point

distanceFromLineSegment(float x, float y, float startX, float startY, float endX, float endY)

Computes the distance from line to point

Declaration

public static float distanceFromLineSegment(float x, float y, float startX, float startY, float endX, float endY)

Parameters

Type	Name	Description
float	x	The x-coordinate of the point to measure distance from
float	y	The y-coordinate of the point to measure distance from
float	startX	The x-coordinate of the line start
float	startY	The y-coordinate of the line start
float	endX	The x-coordinate of the line end
float	endY	The y-coordinate of the line end

Returns

Type	Description
float	The distance from line to point

isInBounds(PointF point, Size viewportSize)

Checks if point lies within bounds

Declaration

public static boolean isInBounds(PointF point, Size viewportSize)

Parameters

Type	Name	Description
android.graphics.PointF	point	The point to check
Size	viewportSize	The bounds

Returns

Type	Description
boolean	True if point lies within bounds

isInBounds(float x, float y, RectF rect)

Checks if point lies within bounds

Declaration

public static boolean isInBounds(float x, float y, RectF rect)

Parameters

Type	Name	Description
float	x	The x-coordinate of the point to check
float	y	The y-coordinate of the point to check
android.graphics.RectF	rect	The bounds

Returns

Type	Description
boolean	True if point lies within bounds

isInBounds(float x, float y, Size viewportSize)

Checks if point lies within bounds

Declaration

public static boolean isInBounds(float x, float y, Size viewportSize)

Parameters

Type	Name	Description
float	x	The x-coordinate of the point to check
float	y	The y-coordinate of the point to check
Size	viewportSize	The bounds

Returns

Type	Description
boolean	True if point lies within bounds

isInBounds(float x, float y, float left, float top, float right, float bottom)

Checks if point lies within bounds

Declaration

public static boolean isInBounds(float x, float y, float left, float top, float right, float bottom)

Parameters

Type	Name	Description
float	x	The x-coordinate of the point to check
float	y	The y-coordinate of the point to check
float	left	The left bounds
float	top	The top bounds
float	right	The right bounds
float	bottom	The bottom bounds

Returns

Type	Description
boolean	True if point lies within bounds

isPointInTriangle(PointF checkPt, PointF pointA, PointF pointB, PointF pointC)

Checks if point lies within triangle

Declaration

public static boolean isPointInTriangle(PointF checkPt, PointF pointA, PointF pointB, PointF pointC)

Parameters

Type	Name	Description
android.graphics.PointF	checkPt	The point to check
android.graphics.PointF	pointA	The first point of the triangle
android.graphics.PointF	pointB	The second point of the triangle
android.graphics.PointF	pointC	The third point of the triangle

Returns

Type	Description
boolean	True if point lies within triangle

liesToTheLeft(PointF pointToCheck, PointF start, PointF end)

Checks if point lies to the left of the line

Declaration

public static boolean liesToTheLeft(PointF pointToCheck, PointF start, PointF end)

Parameters

Type	Name	Description
android.graphics.PointF	pointToCheck	The point to check
android.graphics.PointF	start	The line start
android.graphics.PointF	end	The line end

Returns

Type	Description
boolean	True if point lies to the left of the line

lineIntersection2D(PointF intersection, PointF firstLineStart, PointF firstLineEnd, PointF secondLineStart, PointF secondLineEnd)

Looks for the intersection point for the two lines passed in

Declaration

public static boolean lineIntersection2D(PointF intersection, PointF firstLineStart, PointF firstLineEnd, PointF secondLineStart, PointF secondLineEnd)

Parameters

Type	Name	Description
android.graphics.PointF	intersection	If the lines intersect, holds the intersection point
android.graphics.PointF	firstLineStart	The start point of the first line
android.graphics.PointF	firstLineEnd	The end point of the first line
android.graphics.PointF	secondLineStart	The start point of the second line
android.graphics.PointF	secondLineEnd	The end point of the second line

Returns

Type	Description
boolean	True if the intersection occurs

lineSegmentsIntersection2D(PointF intersection, PointF firstLineStart, PointF firstLineEnd, PointF secondLineStart, PointF secondLineEnd)

Looks for the intersection point for the two lines passed in

Declaration

public static boolean lineSegmentsIntersection2D(PointF intersection, PointF firstLineStart, PointF firstLineEnd, PointF secondLineStart, PointF secondLineEnd)

Parameters

Type	Name	Description
android.graphics.PointF	intersection	If the lines intersect, holds the intersection point
android.graphics.PointF	firstLineStart	The start point of the first line
android.graphics.PointF	firstLineEnd	The end point of the first line
android.graphics.PointF	secondLineStart	The start point of the second line
android.graphics.PointF	secondLineEnd	The end point of the second line

Returns

Type	Description
boolean	True if the intersection occurs