Actionscript 3 :: Flash: Bitmap Inaccuracy - Image Appears To Shift One Pixel?
Oct 12, 2011
I load a bitmap to the stage, it's a GIF and set to lossless compression. I have ensured its coordinates are integers and have not allowed smoothing (smoothing somewhat fixes the issue but reduces quality of the image).The problem is the image appears to shift one pixel to the left and add that pixel on to the right side meaning one side has no border and the other a double border.The original bitmap does not have this issue, and there is no transparency .etc in the image.
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Mar 11, 2011
Is it possible to iterate each pixel of a bitmap image? Eventually what I'm trying to achieve is that I need to get the coordinate values of each pixel of a bitmap image and change the color of those pixels according to their coordinate values. As I see it, I need to use the getPixels() method but I still did not understand exactly what I should do.
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Mar 30, 2010
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Nov 23, 2009
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Aug 7, 2009
Use the flash CS4 tool's on a bitmap image after tracing the bitmap image and applying my settings?
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Feb 28, 2009
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Jun 16, 2010
Using Actionscript 3 is there a way to search one bitmap for the coordinates matching pixels of another bitmap?
[URL]
Somehow you would have to loop through the bigger bitmap to find and the the pixel range that matches and return those coordinates. For example the Bitmap with the "E" is 250 pixels over and 14 pixels down in the bigger bitmap.
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Jan 29, 2007
I've started getting to grips with using the BitmapData class and a Transformation Matrix in the hope that I can start making some interesting image effects. However, at the moment Im having trouble figuring out how to shift the newly created bitmap so that any scale transformations are applied from the center rather than the top left corner. See here for example: [URL] The flower on the left is the original, the flower on the right is the new image created using "bitmapData.draw()". It has been scaled up to twice the size, but I want this to happen from the center of the image.
[Code]...
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Jun 19, 2011
i am using senocular transform tool in my flash, anyone know how to force user to scale image proportionally without pressing shift key?
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May 31, 2010
Can I check if a pixel is transparent or not in a bitmap?
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Nov 21, 2010
I'm making a game where the player moves around a map, where the player can walk and where they can't is decided by the color of the pixel they are trying to move onto, which I get using the Bitmap.getPixel method.
What I'd like to do though is when the map image is loaded process it into a sprite or something which I can then use the DisplayObject.hitTest methods on. So I have an array of colors whcih the user can walk on, is there way I could go through each pixel and build something that would let me do that?
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Oct 5, 2011
I have a bitmap with many colors on it. When the user clicks each color needs to trigger a different method. However, I have no idea how to check the color value of the selected bitmap. I can create a new sprite and check the value of that fine through bitmapdata.getpixel() but when I need to actually check the actual bitmap I cannot get it to work.
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Mar 31, 2007
I have been desperately searching for a way to do pixel perfect collisions, and for someone to explain it to me in detail. explain the code in the .fla file, posted by the Canadian in the frequently asked questions thread on bitmapData hit testing:
[Code]...
after looking through the help files, i must admit they are terribly vague. All you are doing is checking if _alpha is above a certain amount. With movieClips you would use 0->100 but with this hittest you have to use 0->255 (0x00->0xFF)so an _alpha of 50 would correspond to approx 128 (0x80). Nearly all the time you could just use 1 as a hittest parameter so you are checking for any hit at all but maybe you have a shadow in a mc layer and you do not want to check a hit. This is when you might be able to use your threshold parameter. In other words, the hit test will only react to parts of the bitmap which have a greater or equal alpha than the alpha threshold, mostly useful for a shadow.
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Dec 14, 2008
I'm implementing a frame class that builds a graphical frame around children using 9 bitmaps (4 corners and 5 middle pieces).The frame extends sprite, and the 9 frame bitmaps are attached as children. They are repositioned as necessary to encompass any other children on the sprite.
This works fine, normally, but as soon as I rotate or scale the frame, the children split apart, showing what appears to be a one pixel or partial pixel gap between the pieces.
I've tried setting pixelSnapping = PixelSnapping.NEVER on the 9 bitmaps. I've tried turning smoothing=true. The children bitmaps are always positioned at integer x, y's, never fractional. I've tried setting the scale of the children bitmap to 1.01 and PixelSnapping to AUTO. None of it works.
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Nov 9, 2011
I have a drop-down/multi-level CSS menu on a page. The menu however doesn't appear over a flash.i put <param value="transparent" name="wmode"/> I added wmode="transparent" to the EMBED tag then the expanded menu appeared but the color of flash image diaappeared also tried z-index in css.
[Code]...
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Mar 24, 2011
i've filled a circle shape with the bitmap data of a bitmap asset.i need to rotate the circle from the center, so i added the bitmap to the center of the circle and used a matrix transformation to shift the bitmapdata upward and leftward so it appears centered.
now i'm trying to read the bitmap data with getPixel() but the return value is off since it is returning the untransformed position of the bitmap data instead of the visible transformed bitmapdata.
Bitmap(Sprite(evt.currentTarget).getChildAt(0)).bitmapData.getPixel(evt.localX, evt.localY)
how can i get an accurate reading of the pixel data from a bitmap with a matrix transformation? updated with code. assume the redCircleData in my example is more colorful and something worth retrieving pixel data.
var redCircleData:Sprite = new Sprite();
redCircleData.graphics.beginFill(0xFF0000, 1.0);
redCircleData.graphics.drawCircle(0, 0, 100);[code]............
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Apr 26, 2010
For my game, I've made an easy-to-use instruction list to program enemies. It works pretty well, except it's inaccurate, and the only reason I can think of is a rounding error.
Here's how my instruction list works:
list[0] = "Right:60";
list[1] = "Left:60";
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The game loop itself multiplies the xSpeed by a friction variable, which is 0.7 (may be changed later, currently this works best). Now what happens is, the object bounces back and forth just fine. But it after so many times it keeps going a couple of pixels further to the left than to the right. Eventually, the object falls off the screen on the left, while the instruction says it should do 60 game loops of "Left" and 60 loops of "Right".
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Dec 14, 2009
this is EXACTLY what i want... but in AS2 [URL]..a very simple click on a button, popup appears of image, and then an exit button on the image.
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Mar 29, 2010
The site opens with a SWF file. This is my first attempt at Flash. He did not have the fla file so i used a decompiler to generate it and we were able to make most of the changes he wanted. We have one thing left and I am scratching my head trying to figure this out. There are 7 buttons, and when you place your mouse over each button an image appears in the top right of the screen. This image is different depending on what button you are over. He wants to update and change a couple of these images.
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Oct 1, 2009
Image appears after clicking on button
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May 10, 2010
What I would like to do is to take a loaded GIF file as a Bitmap and then distort it by stretching and shrinking parts of it, so it would look like it got squished up against the screen. I'm pretty sure that there's no easy way in Flash to go beyond scaling and shearing, but I wonder if there might be some simple techniques to accomplish this kind of effect. By the way, I've also thought of pre-deforming the images in GIMP and saving them there, but I can't find a simple way to do it without learning their scripting language.
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Nov 15, 2011
I've been tasked to write a chat engine in actionscript3 (AIR) and every chat message has an image of the poster associated with it. So I have 5 chat messages on the screen at any one time but it will be obvious that the images associated with message e.g. #1 changes all the time because the last person posting is different.
What I believe is wrong is to use the .addChild method every time I need to replace the image because it will just keep creating more stuff on the stage. What I tried to do is the code below but it refuses to update the image. The way I thought it should work[code]...
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Aug 10, 2011
Maybe the title is not self explanatory but in most iphone games eg you click the correct example and you see a +100 points mc appear and rise and alpha out. I did this with a png done in photoshop BUT not all goes well - it doesn't work.
[Code]...
It seens perfct but I can't see it work. The funny thing is that the custom currentBubble - with a dot after you see the code hints but a dot after pb100 - you see no code hints. Well not normal.
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Mar 23, 2011
I am trying to set a constant hue value for entire image with using ColorMatrix. My goal is to make entire image look with same color without loosing brightness of any area. I found a way to shift the hue values of an image by using ColorMatrix but i couldn't find any way to set same hue value for all pixels. I can do it with iterating every pixel of image but this approach is too slow. I am not sure if it is possible to do it with ColorMatrix and i am open to possible solutions other than ColorMatrix approach.I can do this with iterating pixels but not with ColorMatrix.I am trying to do this on Android but i believe the question is not directly related to the android since ColorMatrix approach is common on other platforms like Flash, C# etc.
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Mar 22, 2011
I want to create a button which in a press state shows an image and removes it when its unpressed.Now the problem im facing is whenever i click the button the image appears but it soon dissapears as i lose the click.
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Dec 13, 2010
I have an xml gallery that I'm making for my photo business, and I'm having a problem with the order of events firing off here.
Right now when I test my flash, there is a brief moment where I see the image resize from big to the resized format... and the fader does not work anymore.
I want for everytime I open the gallery or click on an image for the resize event to happen, have the image loaded, so that the fading I have in function checkerF can begin...
Pretty much like this: Open gallery Resized image fades in...
Below is the full actionscript code of the Fla. file.
import flash.display.Sprite;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.Event;
[Code]....
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Apr 30, 2010
I want to convert bitmap data to an image file like jpg or png file in AS3.
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Feb 18, 2011
I am making a snow boarding game in AS3. The problem I am having is that I want to leave a trail in the snow behind the board.
I have had a think and feel that the best way of achieving this would be to use the lineTo() method to draw a line form the snowboards previous position to its current position. If I do this all of the way down the slope I would end up with a line almost 23000 pixels long which seems extremely large and will have a major impact on performance.
If I were to convert the trail movieclip to a bitmap would it improve performance? I am targeting a minimum of flash player 9 which I have found to have issues when handling bmp's over 2880 pixels so I think this method might not work.
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Apr 26, 2011
In Photoshop there is a tool that lets you adjust the levels of an image. I'd like to be able to do the same thing. I've seen examples online that show the levels but they are for each individual color channel (red, green, blue or alpha or CMYK) but not a combined view like in Photoshop Input Levels (see below).Also, as a bonus is there a way to find the best shadow and highlight input level settings, basically the settings the Auto level button determines?Update:I think I'm closer but I'm not sure. Here is the method I pieced together. The first image is my results and the second is Photoshop results both analyzing the Google logo:Update 2:Ok I think I got it. The code is below. It's mostly working all the time, mostly. Additional credits:Photoshops results:
Levels method:
/**
* Get a histogram of the grayscale levels
[code].....
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Dec 17, 2009
I am trying to have a video (New CLip.flv) start when the swf file opens and when it finsihes an image appears with some buttons on it (AS on frame 2). However I keep getting the following error:
[Code]...
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