class Point

package openfl.geom

The Point object represents a location in a two-dimensional coordinate system, where x represents the horizontal axis and y represents the vertical axis.

The following code creates a point at(0,0):

Methods and properties of the following classes use Point objects:

  • BitmapData
  • DisplayObject
  • DisplayObjectContainer
  • DisplacementMapFilter
  • NativeWindow
  • Matrix
  • Rectangle

You can use the new Point() constructor to create a Point object.

Constructor

new (?x:Float, ?y:Float)

Creates a new point. If you pass no parameters to this method, a point is created at(0,0).

Parameters:

x

The horizontal coordinate.

y

The vertical coordinate.

Variables

read onlylength:Float

The length of the line segment from(0,0) to this point.

x:Float

The horizontal coordinate of the point. The default value is 0.

y:Float

The vertical coordinate of the point. The default value is 0.

Methods

add (v:Point):Point

Adds the coordinates of another point to the coordinates of this point to create a new point.

Parameters:

v

The point to be added.

Returns:

The new point.

clone ():Point

Creates a copy of this Point object.

Returns:

The new Point object.

copyFrom (sourcePoint:Point):Void

equals (toCompare:Point):Bool

Determines whether two points are equal. Two points are equal if they have the same x and y values.

Parameters:

toCompare

The point to be compared.

Returns:

A value of true if the object is equal to this Point object; false if it is not equal.

normalize (thickness:Float):Void

Scales the line segment between(0,0) and the current point to a set length.

Parameters:

thickness

The scaling value. For example, if the current point is (0,5), and you normalize it to 1, the point returned is at(0,1).

Returns:

The normalized point.

offset (dx:Float, dy:Float):Void

Offsets the Point object by the specified amount. The value of dx is added to the original value of x to create the new x value. The value of dy is added to the original value of y to create the new y value.

Parameters:

dx

The amount by which to offset the horizontal coordinate, x.

dy

The amount by which to offset the vertical coordinate, y.

setTo (xa:Float, ya:Float):Void

subtract (v:Point):Point

Subtracts the coordinates of another point from the coordinates of this point to create a new point.

Parameters:

v

The point to be subtracted.

Returns:

The new point.

toString ():String

Returns a string that contains the values of the x and y coordinates. The string has the form "(x=_x_, y=_y_)", so calling the toString() method for a point at 23,17 would return "(x=23, y=17)".

Returns:

The string representation of the coordinates.

Static methods

staticdistance (pt1:Point, pt2:Point):Float

Returns the distance between pt1 and pt2.

Parameters:

pt1

The first point.

pt2

The second point.

Returns:

The distance between the first and second points.

staticinterpolate (pt1:Point, pt2:Point, f:Float):Point

Determines a point between two specified points. The parameter f determines where the new interpolated point is located relative to the two end points specified by parameters pt1 and pt2. The closer the value of the parameter f is to 1.0, the closer the interpolated point is to the first point(parameter pt1). The closer the value of the parameter f is to 0, the closer the interpolated point is to the second point(parameter pt2).

Parameters:

pt1

The first point.

pt2

The second point.

f

The level of interpolation between the two points. Indicates where the new point will be, along the line between pt1 and pt2. If f=1, pt1 is returned; if f=0, pt2 is returned.

Returns:

The new, interpolated point.

staticpolar (len:Float, angle:Float):Point

Converts a pair of polar coordinates to a Cartesian point coordinate.

Parameters:

len

The length coordinate of the polar pair.

angle

The angle, in radians, of the polar pair.

Returns:

The Cartesian point.