AS3 bitmapData on nextframe();

Question

not a coder so struggling a little here:

Trying to draw current frame in the next frame as a bitmap for cpu efficiency. In AS2 this code works like a charm:

import flash.display.*;
// # create the bitmap
var tBitmapData = new BitmapData(400, 200, true, 0x00000000);

// # now draw this movieClip's content to the bitmap
tBitmapData.draw(this);
// # 2nd frame should be blank!
nextFrame();
// # now attach the bitmap you made to this movieclip
this.attachBitmap(tBitmapData, 1, "auto", true);

Just need to know how to re-write this for AS3. Thank you!

should a matter of replacing the attachBitmap line with something like: `addChild(new Bitmap(tBitmapData));` — George Profenza, Nov 21 '12 at 20:13

score 1 · Answer 1 · answered Nov 21 '12 at 20:32

First, in AS3 BitmapData is not a DisplayObject. You need to wrap it into a Bitmap object. Then you replace attachBitmap with addChild as George Profenza mentioned:

import flash.display.*;
// # create the bitmap
var tBitmapData:BitmapData = new BitmapData(400, 200, true, 0x000000);

// # now draw this movieClip's content to the bitmap
tBitmapData.draw(this);
// # 2nd frame should be blank!
nextFrame();
// # now attach the bitmap you made to this movieclip
this.addChild(new Bitmap(tBitmapData));

Also try to type your variables (var tBitmapData:BitmapData). This increases performance and allows the compiler to catch some errors.

AS3 bitmapData on nextframe();

1 Answers1