How to record draws lines?

Hello

My goal is to make a flash application that can do these things:

-drawing application database (I can handle this part)

-Save the user features

-save data that record each moves in a single file, let's call my-design-data file

-load my-design-data file into the flash application

-reading my-design-data file in order to watch a kind of movie that shows the drawing who 'draw' itself

A good example of this application can be found on drawingnow.com. So I know it's possible but how...?

Any ideas how they do?

Hello

Here is a very rough idea on how to record and playback of drawing.

Capture the drawing:

-drawing points are stored in a table "_pointArray".

-the "_pointArray" coded JSON is published on the server.

-Next - server, save the string in a file or a database.

          private function mouseDownHandler(e:MouseEvent):void{

               //start new segment
               moveTo(stage.mouseX,stage.mouseY);

               //mark the point as starting point , "newline=true"
               _pointArray.push({x:stage.mouseX, y:stage.mouseY, time:getTimer(), newline:true});

          }

          private function mouseMoveHandler(e:MouseEvent):void{
               if(e.buttonDown){

                    //draw line
                    drawLine(stage.mouseX, stage.mouseY);

                    //record the points
                    _pointArray.push({x:stage.mouseX, y:stage.mouseY, time:getTimer()});

               }
          }

          private function moveTo(x:Number, y:Number):void{
               this.graphics.moveTo(x,y);
          }

          private function drawLine(x:Number, y:Number):void{
               this.graphics.lineTo(x,y);
          }

          private function saveData():void{
               var json:JSONEncoder = new JSONEncoder(_pointArray);
               var urlVariable:URLVariables = new URLVariables();
               var urlRequest:URLRequest = new URLRequest('{URL_TO_POST_AND_SAVE_POINTS}');

               urlVariable.points = json.getString();
               urlRequest.method = URLRequestMethod.POST;
               urlRequest.data = urlVariable;

               var urlLoader:URLLoader = new URLLoader();

               urlLoader.load(urlRequest);
               urlLoader.addEventListener(Event.COMPLETE, saveCompleteHandler);

          }

          private function saveCompleteHandler(e:Event):void{
               trace("Saved the animation");
          }

Load and replay the animation:

-load the json string

-Decode the json string to array

-Playback of the animation

                         private function loadData():void{
                    var urlRequest:URLRequest = new URLRequest('{REQUEST_URL_TO_LOAD_POINTS}');
                    var urlLoader:URLLoader = new URLLoader();
                    urlLoader.addEventListener(Event.COMPLETE,loadCompleteHandler);
                    urlLoader.load(urlRequest);
               }

               private function loadCompleteHandler(e:Event):void{
                    var loader:URLLoader = e.target as URLLoader;
                    var json:JSONDecoder = new JSONDecoder(loader.data as String);
                    _pointArray = json.getValue() as Array;

                    //start the animation
                    playAnimation();
               }

               //Playback the drawing on an EnterFrame/Timer event
               private function playBackHandler(e:Event):void{
                    var nextPoint:Object = _pointArray[_currentIndex];
                    var nextMilliSec:Number =  nextPoint.time;
                    var timeLapsed:Number = getTimer() - _startTime;

                    while(timeLapsed >= nextMilliSec){
                         if(nextPoint.newline){
                              //stating point
                              moveTo(nextPoint.x, nextPoint.y);
                         }else{
                              //draw line
                              drawLine(nextPoint.x, nextPoint.y);
                         }

                         //next array index
                         _currentIndex++;

                         //reached the end?
                         if(_currentIndex >= _pointArray.length){
                              stopPlayBack();
                              break;
                         }else{
                              nextPoint = _pointArray[_currentIndex];
                              nextMilliSec =  nextPoint.time;
                         }

                    }
               }

Kadiatou

Tags: Adobe Animate

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How to record draws lines?

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