Created
December 9, 2011 10:06
-
-
Save Tomyail/1450965 to your computer and use it in GitHub Desktop.
坐标旋转版圆周运动(包含坐标误差版本和正确版本)
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package demo | |
{ | |
import flash.display.Sprite; | |
import flash.events.*; | |
import flash.geom.Matrix; | |
import flash.geom.Point; | |
public class FishRoundFly extends Sprite | |
{ | |
private var fish:Sprite = new Sprite; | |
// private var centerPoint:Point = new Point; | |
private var increaseDegree:Number = 1; | |
private var cos:Number; | |
private var sin:Number; | |
private var radias:Number; | |
private var preX:Number; | |
private var preY:Number; | |
private var currentX:Number; | |
private var currentY:Number; | |
public function FishRoundFly() | |
{ | |
fish.graphics.beginFill(0); | |
fish.graphics.drawRect(0,0,20,20); | |
addChild(fish); | |
fish.x = 50 | |
fish.y = 0; | |
currentX = fish.x; | |
currentY = fish.y | |
radias = increaseDegree*Math.PI/180; | |
cos = Math.cos(radias); | |
sin = Math.sin(radias); | |
this.addEventListener(Event.ENTER_FRAME,updateFrame); | |
this.graphics.lineStyle(1); | |
} | |
protected function updateFrame(event:Event):void | |
{ | |
preX = currentX; | |
preY = currentY; | |
currentX = preX * cos - preY * sin; | |
currentY = preY * cos + preX * sin; | |
fish.x = currentX; | |
fish.y = currentY; | |
this.graphics.lineTo(fish.x,fish.y); | |
trace("preX",preX,"curX",currentX,"fishX",fish.x); | |
} | |
} | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package demo | |
{ | |
import flash.display.Sprite; | |
import flash.events.*; | |
public class FishRoundFly extends Sprite | |
{ | |
private var fish:Sprite = new Sprite; | |
// private var centerPoint:Point = new Point; | |
private var increaseDegree:Number = 1; | |
private var cos:Number; | |
private var sin:Number; | |
private var radias:Number; | |
private var preX:Number; | |
private var preY:Number; | |
public function FishRoundFly() | |
{ | |
fish.graphics.beginFill(0); | |
fish.graphics.drawRect(0,0,20,20); | |
addChild(fish); | |
fish.x = 50 | |
fish.y = 0; | |
radias = increaseDegree*Math.PI/180; | |
cos = Math.cos(radias); | |
sin = Math.sin(radias); | |
this.addEventListener(Event.ENTER_FRAME,updateFrame); | |
this.graphics.lineStyle(1); | |
} | |
protected function updateFrame(event:Event):void | |
{ | |
preX = fish.x; | |
preY = fish.y; | |
fish.x = preX * cos - preY * sin; | |
fish.y = preY * cos + preX * sin; | |
this.graphics.lineTo(fish.x,fish.y); | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment