Packageorg.un.flex.utils
Classpublic class GraphicUtils

This is a class to provide some static functions to help with drawing and geometry.


Public Methods
 MethodDefined by
  
drawArc(g:Graphics, angleDelta:Number, centerX:Number, centerY:Number, startX:Number, startY:Number):void
[static] Draws an arc starting at P and subtending an angle at the center of the circle O, where:
angle = angleDelta
O = [centerX, centerY]
P = [startX, startY]
GraphicUtils
  
equal(p1:Point, p2:Point):Boolean
[static] Function that tests if two points are equal within tolerance The current tolerance limit is (1, 1) - same as pixel resolution on screen
GraphicUtils
  
getAngle(x1:Number, y1:Number, x2:Number, y2:Number, atX:Number, atY:Number):Number
[static] Returns the positive angle between two lines OP and OQ at point O, where:
P = [x1, y1]
Q = [x2, y2]
O = [atX, atY]
GraphicUtils
  
getCenter(c:DisplayObject):Point
[static] Function that returns the center point of a display object
GraphicUtils
  
getRotation(angleDelta:Number, centerX:Number, centerY:Number, startX:Number, startY:Number):Point
[static] Returns the endpoint Q of a line OP that is rotated clock-wise about point O, where:
O = [centerX, centerY]
P = [startX, startY]
Q = [endX, endY]
GraphicUtils
Method detail
drawArc()method
public static function drawArc(g:Graphics, angleDelta:Number, centerX:Number, centerY:Number, startX:Number, startY:Number):void

Draws an arc starting at P and subtending an angle at the center of the circle O, where:
angle = angleDelta
O = [centerX, centerY]
P = [startX, startY]

Parameters
g:Graphics
 
angleDelta:Number
 
centerX:Number
 
centerY:Number
 
startX:Number
 
startY:Number
equal()method 
public static function equal(p1:Point, p2:Point):Boolean

Function that tests if two points are equal within tolerance The current tolerance limit is (1, 1) - same as pixel resolution on screen

Parameters
p1:Point
 
p2:Point

Returns
Boolean
getAngle()method 
public static function getAngle(x1:Number, y1:Number, x2:Number, y2:Number, atX:Number, atY:Number):Number

Returns the positive angle between two lines OP and OQ at point O, where:
P = [x1, y1]
Q = [x2, y2]
O = [atX, atY]

Parameters
x1:Number
 
y1:Number
 
x2:Number
 
y2:Number
 
atX:Number
 
atY:Number

Returns
Number
getCenter()method 
public static function getCenter(c:DisplayObject):Point

Function that returns the center point of a display object

Parameters
c:DisplayObject

Returns
Point
getRotation()method 
public static function getRotation(angleDelta:Number, centerX:Number, centerY:Number, startX:Number, startY:Number):Point

Returns the endpoint Q of a line OP that is rotated clock-wise about point O, where:
O = [centerX, centerY]
P = [startX, startY]
Q = [endX, endY]

Parameters
angleDelta:Number
 
centerX:Number
 
centerY:Number
 
startX:Number
 
startY:Number

Returns
Point