ActionScript 3.0 :: Getting The Bitmap Rotation Performance?
Dec 15, 2009
I've been developing an application which uses a lot of sprites to create a 'wheel of fortune'-like object. Since I use several filters, sprites, countless calculations, and various other tricks to draw it, it became painfully slow to try to spin that, as flash had to redraw everything every frame.
Needless to say, I took the bitmapData 'snapshot' approach - I drew the massive combined sprite to a bitmapData, removed the original sprites, filters, et al from the display list and nulled them, Threw the BMD into a Bitmap object, placed that in a container sprite so that I wouldn't have to continually use a matrix to rotate from the center when it registers at the top left, and started rotating the container.
Unfortunately, it seems that rotating the container with this 500x500 Bitmap in it is nearly as slow as it was when I hadn't snapshotted it and rotated the whole thing, filters and all. I have already played with the BitmapData's transparency, turned on and off cacheAsBitmap on various combinations of containers and the bitmap itself (hahaha), checked the Bitmap.smoothing property out, blah blah blah, the whole nine yards. Rotating a decently sized Bitmap (thus making pre-rendered/calculated frames a really bad idea) ... how do I make this run at a tolerable speed without eating my CPU and turning the fans on?
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Feb 28, 2012
I have a project where i'm drawing to a stageSized bitmap by using BitmapData.drawusing the 'show update regions' feature of the debug player, i can see that the player always updates the whole stage although i changed only a small part of the bitmapdata.Can I somehow make the player only update that part of the screen where there were changes made to the bitmap data?
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Nov 26, 2008
for the past couple of weeks I've been learning AS3, and for a school project I'm doing a remake of the popular DOS game Liero. Everything is working fine, I got a layer of dirt that I am shooting away, but the problem is that after a few hundred bullets, the game starts to lag heavily whenever a shot is fired.I'm using a simple bitmap and a brush to erase the parts where the bullets hit.
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[code]...
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Mar 14, 2011
i've created a full spectrum color wheel Sprite object that is composed of 1440 vector triangles, or slices if you will. since i want to animate the color wheel, i've activated the display object's cacheAsBitmap property. however, caching the vector as a bitmap does not increase performance during animation it remains slow, jumpy. importing a PNG screenshot of the color wheel into the library with lossless compression, converting it to a Sprite, and rotating this new image asset performs great during animation. why does an uncompressed PNG image asset import out perform the same vector image with cacheAsBitmap property set to true?
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May 24, 2009
I am completely new to using Flash and AS, so I decided to start off with something that seemed simple enough, rotating an image. Turns out it's anything but simple. My initial idea was simply to have two layers, on one of which I had the image I wanted to rotate, and above that some other image that was transparent. I've had lots of problems with this but I have managed to hack my way through to some solutions. I would like for someone to confirm if I have understood these solutions correctly.
One problem was that I implement my images (which were BMP at first but now GIF) as Bitmap, and they sit in the library and on stage, so they're visible when I run my Flash movie. However I had problems figuring out how to access the rotation property of my Bitmap, and what I ended up figuring out is that apparently even if it's loaded on the stage and in the library, it can't be used by AS as such. So I ended up having to use Linkage and making a SkyClass, which I then use to make a Sprite, which I can then change the orientation of. But is that really how I have to access my Bitmap, even if I put it on the Stage designtime?
[Code]...
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Mar 1, 2009
I've included the full class called Navigation.as. The class basically draws navigation elements on screen and displays them onMouse over and out. What's also neat is that it actually "rotates" them onto the screen. Now I'm using a font called "Minx" which is a bitmap font. However when the rotation occurs the image quality and the text ends up looking *really* blurry. It appears others have noticed this issue: [URL]. The issue is thus that when Flash converts the MovieClip to bitmap it's perspective distorts the quality.
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Sep 12, 2011
this is what i'm trying to accomplish; With a click on a movieclip (cannon_mc)a shot is being fired (ball_mc)
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What is the most efficient way to accomplish this? With a timer or something like this;
[Code]...
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Jan 11, 2011
I'm devloping some library classes for flocking/steering behaviours on large numbers of objects (2000+). I'm finding that at < 500 instances, performance is reasonable. As the numbers increase, framerate bogs down.
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Nov 4, 2011
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Jan 7, 2010
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Mar 23, 2011
I'm trying to do some augmented reality projects with flartoolkit . I can now put simple 3d objects on my marker and it works fine , but I wanna give my project some events that the user can interact with. I'm trying to trace the rotation of the marker. there's a container:DisplayObject3D which my application uses to add the 3d objects , I traced this :"trace(container.rotationZ)" but it's just returning 0 . I studied another AR application's source code and it was using the rotation of it's container object without problem .and I think I should mention that I'm using the exercise file of seb lee delisle papervision3d course from [URL]. anyone has any experience with flartoolkit? the main functions of my my code is as below:
[Code]...
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Aug 11, 2010
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Apr 21, 2009
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[Code]...
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Aug 11, 2006
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[code]....
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Feb 23, 2009
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Oct 8, 2009
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Dec 2, 2008
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[Code]...
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Feb 3, 2009
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[Code]....
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Aug 20, 2009
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Code:
var original_bitmap: Bitmap;
var copy_of_original_bitmap: Bitmap = new Bitmap(original_bitmap.bitmapData);
LiveDocs mention that the BitmapData being passed to a Bitmap constructor is "being referenced", which to me might suggest it cannot be used twice? There is also the BitmapData::clone() method, which I am not sure is applicable here or not.I know this is a lot of talk instead of just trying this out, but I test so much Flash Player code daily just to see "what works" (which should be documented instead by Adobe),
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Feb 22, 2011
If I have a BitmapData that's already been drawn onto a Sprite. Is there a way to redraw the BitmapData onto a Sprites Graphics object without having to invoke beginBitmapFill and passing in the same BitmapData?
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Dec 29, 2010
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Code:
// bitmap test
import flash.display.Bitmap;
import flash.display.Bitmap;[code]......
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Actionscript Code:
public override function copyToBackBuffer(db:BitmapData):void{ if (active) var drawRect:Rectangle = new Rectangle((currentFrame-1) * frameWidth, 0, frameWidth,
[code].....
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Feb 17, 2012
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[Code]...
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Oct 8, 2006
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I'm using Sandy to animate some objects in 3D. What I currently do to images which are EXPORTED in the library, I want to do to some bitmaps that I create using the DRAW technique. But it wont work :-(
CODE FOR 'CREATED BITMAP' :
ActionScript Code:
var bData:BitmapData = new BitmapData(myObject.width,myObject.height);
bData.draw(mask5);
[Code]....
Sandy doesn't seem to treat the 'created' bitmap the same as those that are exported from the library.
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Feb 24, 2012
Let´s say I have a bitmap with 3 colors: red, green and blue (not mixed)
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