我正在尝试在Flash Builder中编写一个美元识别器。我是actionscript和mxml的新手，我在下面的代码中的“myRec.addTemplate ...”行中收到此错误：
import de.yuv.gestures.Recognizer;
import flash.display.Graphics;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.MouseEvent;
import flash.geom.Point;
var myRec:Recognizer = new Recognizer();
myRec.addTemplate("triangle", new Array(new Point(137,139),new Point(135,141),new Point(133,144),new Point(132,146),new Point(130,149),new Point(128,151),new Point(126,155),new Point(123,160),new Point(120,166),new Point(116,171),new Point(112,177),new Point(107,183),new Point(102,188),new Point(100,191),new Point(95,195),new Point(90,199),new Point(86,203),new Point(82,206),new Point(80,209),new Point(75,213),new Point(73,213),new Point(70,216),new Point(67,219),new Point(64,221),new Point(61,223),new Point(60,225),new Point(62,226),new Point(65,225),new Point(67,226),new Point(74,226),new Point(77,227),new Point(85,229),new Point(91,230),new Point(99,231),new Point(108,232),new Point(116,233),new Point(125,233),new Point(134,234),new Point(145,233),new Point(153,232),new Point(160,233),new Point(170,234),new Point(177,235),new Point(179,236),new Point(186,237),new Point(193,238),new Point(198,239),new Point(200,237),new Point(202,239),new Point(204,238),new Point(206,234),new Point(205,230),new Point(202,222),new Point(197,216),new Point(192,207),new Point(186,198),new Point(179,189),new Point(174,183),new Point(170,178),new Point(164,171),new Point(161,168),new Point(154,160),new Point(148,155),new Point(143,150),new Point(138,148),new Point(136,148)));
因为我已经将myRec定义在它之上，所以我真的很困惑。但是，相同的代码在Flash Professional中有效，这使我相信我缺少一些导入语句或其他微妙的内容，而这些内容并未明确我的错误消息。
非常感谢任何帮助。
谢谢， NinjaSteph
编辑（完整的错误消息）： 描述资源路径位置类型 1120：访问未定义的属性myRec。 GestureRecognizer.mxml / GestureRecognizer / src第17行Flex问题
编辑（完成mxml文件）：
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
minWidth="955" minHeight="600" currentState="Title">
<fx:Script><![CDATA[
import de.yuv.gestures.Recognizer;
import flash.display.Graphics;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.MouseEvent;
import flash.geom.Point;
var myRec:Recognizer = new Recognizer();
myRec.addTemplate("triangle", new Array(new Point(137,139),new Point(135,141),new Point(133,144),new Point(132,146),new Point(130,149),new Point(128,151),new Point(126,155),new Point(123,160),new Point(120,166),new Point(116,171),new Point(112,177),new Point(107,183),new Point(102,188),new Point(100,191),new Point(95,195),new Point(90,199),new Point(86,203),new Point(82,206),new Point(80,209),new Point(75,213),new Point(73,213),new Point(70,216),new Point(67,219),new Point(64,221),new Point(61,223),new Point(60,225),new Point(62,226),new Point(65,225),new Point(67,226),new Point(74,226),new Point(77,227),new Point(85,229),new Point(91,230),new Point(99,231),new Point(108,232),new Point(116,233),new Point(125,233),new Point(134,234),new Point(145,233),new Point(153,232),new Point(160,233),new Point(170,234),new Point(177,235),new Point(179,236),new Point(186,237),new Point(193,238),new Point(198,239),new Point(200,237),new Point(202,239),new Point(204,238),new Point(206,234),new Point(205,230),new Point(202,222),new Point(197,216),new Point(192,207),new Point(186,198),new Point(179,189),new Point(174,183),new Point(170,178),new Point(164,171),new Point(161,168),new Point(154,160),new Point(148,155),new Point(143,150),new Point(138,148),new Point(136,148)));
var recordedPoints:Array;
public function hideAllHighlights():void
{
for (var i:uint = 0; i < myRec.Templates.length; i++){
var mc:MovieClip = this["mc_"+myRec.Templates[i].Name];
trace(mc);
if (mc)
{
mc.visible = false;
}
}
}
var record:Boolean = false;
//hideAllHighlights();
public function handleMouseDown (event:MouseEvent):void
{
trace('handleMouseDown:');
record = true;
hideAllHighlights();
recordedPoints = new Array();
//clear objects from stage that are not circles
for(var i:int = 0; recPanel.stage.numChildren>i; ){
if(recPanel.stage.getChildAt(i).name == "circle")
recPanel.stage.removeChildAt(i);
else
i++;
}
}
public function handleMouseUp(event:MouseEvent):void
{
trace('handleMouseUp:');
record = false;
var myResult = myRec.recognize(recordedPoints);
trace (myResult.Name);
trace (myResult.Score);
resLabel.text = myResult.Name;
/*var mc:MovieClip = this["mc_"+myResult.Name];
if (mc){
mc.visible = true;
}*/
}
public function drawCircle(x:Number, y:Number):void
{
var circle:Shape = new Shape;
circle.name = "circle";
var radius:Number = 1;
circle.graphics.beginFill(0x000000);
circle.graphics.drawCircle(x+recPanel.x, y+recPanel.y, radius);
recPanel.stage.addChild(circle);
}
public function handleMouseMove(event:MouseEvent):void
{
if (record){
trace('handleMouseMove'+event.localX+" "+event.localY);
recordedPoints.push(new Point(event.localX,event.localY));
drawCircle(event.localX,event.localY);
}
}
//recPanel.addEventListener ( MouseEvent.MOUSE_DOWN, handleMouseDown );
//recPanel.addEventListener ( MouseEvent.MOUSE_UP, handleMouseUp );
//recPanel.addEventListener ( MouseEvent.MOUSE_MOVE, handleMouseMove );
protected function startBkgd_clickHandler(event:MouseEvent):void
{
setCurrentState("RecognizerState");
}
]]></fx:Script>
<s:states>
<s:State name="Title"/>
<s:State name="RecognizerState"/>
</s:states>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<s:Label includeIn="Title" fontSize="36" horizontalCenter="0" text="Dollar Gesture Recognizer"
textAlign="center" verticalAlign="middle" verticalCenter="-30"/>
<s:Label includeIn="Title" fontSize="18" horizontalCenter="0" text=""
verticalCenter="40"/>
<s:Panel id="recPanel" includeIn="RecognizerState" left="50" width="400" height="400"
color="#0B333C" fontSize="24" textAlign="center" title="Gesture Recognizer"
verticalCenter="0" mouseDown="handleMouseDown(event)" mouseMove="handleMouseMove(event)"
mouseUp="handleMouseUp(event)">
</s:Panel>
<s:Panel id="gesPanel" includeIn="RecognizerState" width="300" height="400" fontSize="24"
horizontalCenter="0" textAlign="center" title="Available Gestures" verticalCenter="0">
</s:Panel>
<s:Label id="startBkgd" includeIn="Title" x="10" y="10" width="1263" height="591"
click="startBkgd_clickHandler(event)" />
<s:Panel id="resMeme" includeIn="RecognizerState" right="50" width="400" height="400"
fontSize="24" title="Resulting Meme" verticalCenter="0">
<s:Label id="resLabel" x="103" y="165" width="180" text="result" textAlign="center"/>
</s:Panel>
识别器类：
package de.yuv.gestures
{
import de.yuv.gestures.Result;
import de.yuv.gestures.Template;
import flash.geom.Point;
import flash.geom.Rectangle;
public class Recognizer {
public static var NumPoints:int = 64;
public static var SquareSize:Number = 250.0;
public static var HalfDiagonal = 0.5 * Math.sqrt(250.0 * 250.0 + 250.0 * 250.0);
public static var AngleRange = 45.0;
public static var AnglePrecision = 2.0;
public static var Phi = 0.5 * (-1.0 + Math.sqrt(5.0)); // Golden Ratio
public var Templates:Array;
public function Recognizer(){
this.Templates = new Array();
}
public function recognize(points)
{
points = Resample(points, NumPoints);
points = RotateToZero(points);
points = ScaleToSquare(points, SquareSize);
points = TranslateToOrigin(points);
var b = +Infinity;
var t;
for (var i = 0; i < this.Templates.length; i++)
{
var d = DistanceAtBestAngle(points, this.Templates[i], -AngleRange, +AngleRange, AnglePrecision);
if (d < b)
{
b = d;
t = i;
}
}
var score = 1.0 - (b / HalfDiagonal);
return new Result(this.Templates[t].Name, score);
};
//
// add/delete new templates
//
public function addTemplate(name, points)
{
this.Templates[this.Templates.length] = new Template(name, points); // append new template
var num = 0;
for (var i = 0; i < this.Templates.length; i++)
{
if (this.Templates[i].Name == name)
num++;
}
return num;
}
// Helper functions
public static function Resample(points, n)
{
var I = PathLength(points) / (n - 1); // interval length
var D = 0.0;
var newpoints = new Array(points[0]);
for (var i = 1; i < points.length; i++)
{
var d = Distance(points[i - 1], points[i]);
if ((D + d) >= I)
{
var qx = points[i - 1].x + ((I - D) / d) * (points[i].x - points[i - 1].x);
var qy = points[i - 1].y + ((I - D) / d) * (points[i].y - points[i - 1].y);
var q = new Point(qx, qy);
newpoints[newpoints.length] = q; // append new point 'q'
points.splice(i, 0, q); // insert 'q' at position i in points s.t. 'q' will be the next i
D = 0.0;
}
else D += d;
}
// somtimes we fall a rounding-error short of adding the last point, so add it if so
if (newpoints.length == n - 1)
{
newpoints[newpoints.length] = points[points.length - 1];
}
return newpoints;
}
public static function RotateToZero(points)
{
var c = Centroid(points);
var theta = Math.atan2(c.y - points[0].y, c.x - points[0].x);
return RotateBy(points, -theta);
}
public static function ScaleToSquare(points, size)
{
var B = BoundingBox(points);
var newpoints = new Array();
for (var i = 0; i < points.length; i++)
{
var qx = points[i].x * (size / B.width);
var qy = points[i].y * (size / B.height);
newpoints[newpoints.length] = new Point(qx, qy);
}
return newpoints;
}
public static function TranslateToOrigin(points)
{
var c = Centroid(points);
var newpoints = new Array();
for (var i = 0; i < points.length; i++)
{
var qx = points[i].x - c.x;
var qy = points[i].y - c.y;
newpoints[newpoints.length] = new Point(qx, qy);
}
return newpoints;
}
public static function DistanceAtBestAngle(points, T, a, b, threshold)
{
var x1 = Phi * a + (1.0 - Phi) * b;
var f1 = DistanceAtAngle(points, T, x1);
var x2 = (1.0 - Phi) * a + Phi * b;
var f2 = DistanceAtAngle(points, T, x2);
while (Math.abs(b - a) > threshold)
{
if (f1 < f2)
{
b = x2;
x2 = x1;
f2 = f1;
x1 = Phi * a + (1.0 - Phi) * b;
f1 = DistanceAtAngle(points, T, x1);
}
else
{
a = x1;
x1 = x2;
f1 = f2;
x2 = (1.0 - Phi) * a + Phi * b;
f2 = DistanceAtAngle(points, T, x2);
}
}
return Math.min(f1, f2);
}
public static function PathLength(points)
{
var d = 0.0;
for (var i = 1; i < points.length; i++)
d += Distance(points[i - 1], points[i]);
return d;
}
public static function Distance(p1, p2)
{
var dx = p2.x - p1.x;
var dy = p2.y - p1.y;
return Math.sqrt(dx * dx + dy * dy);
}
public static function Centroid(points)
{
var x = 0.0, y = 0.0;
for (var i = 0; i < points.length; i++)
{
x += points[i].x;
y += points[i].y;
}
x /= points.length;
y /= points.length;
return new Point(x, y);
}
public static function RotateBy(points, theta)
{
var c = Centroid(points);
var cos = Math.cos(theta);
var sin = Math.sin(theta);
var newpoints = new Array();
for (var i = 0; i < points.length; i++)
{
var qx = (points[i].x - c.x) * cos - (points[i].y - c.y) * sin + c.x
var qy = (points[i].x - c.x) * sin + (points[i].y - c.y) * cos + c.y;
newpoints[newpoints.length] = new Point(qx, qy);
}
return newpoints;
}
public static function BoundingBox(points)
{
var minX = +Infinity, maxX = -Infinity, minY = +Infinity, maxY = -Infinity;
for (var i = 0; i < points.length; i++)
{
if (points[i].x < minX)
minX = points[i].x;
if (points[i].x > maxX)
maxX = points[i].x;
if (points[i].y < minY)
minY = points[i].y;
if (points[i].y > maxY)
maxY = points[i].y;
}
return new Rectangle(minX, minY, maxX - minX, maxY - minY);
}
public static function DistanceAtAngle(points, T, theta)
{
var newpoints = RotateBy(points, theta);
return PathDistance(newpoints, T.Points);
}
public static function PathDistance(pts1, pts2)
{
var d = 0.0;
for (var i = 0; i < pts1.length; i++) // assumes pts1.length == pts2.length
d += Distance(pts1[i], pts2[i]);
return d / pts1.length;
}
}
}
答案 0 :(得分：2)
这不应该属于某种类别吗？
如：
package
{
// imports
public class Main() extends Sprite // extend Sprite if you want to use it as your document class
{
public function Main()
{
// your code here
}
}
}
答案 1 :(得分：0)
@Amy Blackenship，你是对的，因为我的代码“松散”在我的脚本中。但是，我只是将代码放在我运行应用程序时运行的函数中，而不是创建一个不必要的类。我似乎只是遗漏了一些非常基本的动作脚本。
以下是我修复的代码：
var myRec:Recognizer = new Recognizer();
public function start():void
{
//resImage.source = "assets/omeme.jpg";
myRec.addTemplate("triangle", new Array(new Point(137,139),new Point(135,141),new Point(133,144),new Point(132,146),new Point(130,149),new Point(128,151),new Point(126,155),new Point(123,160),new Point(120,166),new Point(116,171),new Point(112,177),new Point(107,183),new Point(102,188),new Point(100,191),new Point(95,195),new Point(90,199),new Point(86,203),new Point(82,206),new Point(80,209),new Point(75,213),new Point(73,213),new Point(70,216),new Point(67,219),new Point(64,221),new Point(61,223),new Point(60,225),new Point(62,226),new Point(65,225),new Point(67,226),new Point(74,226),new Point(77,227),new Point(85,229),new Point(91,230),new Point(99,231),new Point(108,232),new Point(116,233),new Point(125,233),new Point(134,234),new Point(145,233),new Point(153,232),new Point(160,233),new Point(170,234),new Point(177,235),new Point(179,236),new Point(186,237),new Point(193,238),new Point(198,239),new Point(200,237),new Point(202,239),new Point(204,238),new Point(206,234),new Point(205,230),new Point(202,222),new Point(197,216),new Point(192,207),new Point(186,198),new Point(179,189),new Point(174,183),new Point(170,178),new Point(164,171),new Point(161,168),new Point(154,160),new Point(148,155),new Point(143,150),new Point(138,148),new Point(136,148)));
谢谢，
NinjaSteph