I'm having difficulty with transforming colour in Flash. It should be easy I think, but for some reason my code isn't working as expected.
I have a bitmap graphic consisting of a colour spectrum from red to yellow to green (you know, like you see in an audio level meter).
I simply want to sample a colour from that bitmap and then tint a movie clip on stage that sampled colour. (the effect I'll be going for is coloured progress - the closer you get to 100% green is displayed, the closer you are to 0% it's red - I haven't implemented that part yet, but I'm not worried about that).
Anyhow, I sample the colour just fine, and tint my clip, but no matter what I tint the clip it comes up a different colour than what I've sampled (the trace is a different colour than what I see on the clip). I can't see where I'm going wrong - I'm hoping it's a stupid mistake and someone can spot it easily.
import flash.display.BitmapData;
var bmd:BitmapData = new BitmapData(mc_colourbar.width, mc_colourbar.height);
bmd.draw(mc_colourbar);
var pixelvalue:uint = bmd.getPixel(0, 1);
trace(pixelvalue.toString(16));
var colourtransform:ColorTransform = mc_box.transform.colorTransform;
colourtransform.color = uint("0xff" + pixelvalue);
mc_box.transform.colorTransform = colourtransform ;
mc_box is the clip on stage I'm trying to tint - it's simply a white square.
Any help is appreciated, thanks in advance!
ColorTransform.color expects an RGB value, and it appears as though you're attempting to give it an ARGB value*.
Change the line:
colourtransform.color = uint("0xff" + pixelvalue);
to just:
colourtransform.color = pixelvalue;
and your code should work as expected.
*Though I don't think the way you're trying to do it here is correct.
Related
I want to mask the png image pattern.png with another image - mask.png, but it doesn't work at all and I can't find the reason. Instead of masking the image, the mask just disappears and the pattern stays the same as it was.
I tried making a MovieClip, drawing e.g. a circle and using that as the mask instead of mask.png and it works just fine. Is it because you can't use loader objects as masks? How do I make it work?
edit: After changing the size of mask.png to be smaller than the pattern, I've realized that it actually does kind of work, but what happens is instead of cutting the pattern into the shape I've drawn in the png file it just cuts it into the shape of the entire file, as in, it counts the rectangular transparent background as well. How can I make it cut out just the shape?
var mask:Loader = new Loader();
mask.load(new URLRequest("mask.png"));
var pattern:Loader = new Loader();
pattern.load(new URLRequest("pattern.png"));
pattern.contentLoaderInfo.addEventListener(Event.COMPLETE, loadComplete);
function loadComplete(e:Event):void {
addChild(pattern);
addChild(mask);
pattern.mask = mask;
}
Your code is looks correctly. The mask property of DisplayObject wants DisplayObject too. But try to make few things, to find the trouble:
You have only one listener, to pattern.png. But you must be sure, that mask.png has loaded already too.
Despite that Loader is DisplayObject too - try to get content from loader for mask, and just after that try to use it.
*Ah, and one more thing. You must at first add listener, and only later try to load.
I am working on a flash sound mixer application with multiple sound channels, and I am having trouble with the lights beside the volume knob.
Is there a way to hide just a part of an image?
On the image below, image-2 is on top of image-1 to create some kind of volume level indicator effect, and how much of image-2 is shown depends on the value of the volume.
image-url: http://s30.postimg.org/r3ow1g5bl/volume_lights_level.png
I've tried by just reducing the height of image-2, but it looks awful and distorted.
Is there something in flash that works closely the same as CSS's behavior.
example: I'll just make image-2 a background of a shape, and when I reduce the shape's height, the image-background does not get distorted or changes it's height as well.
By searching for solutions, I have come across the mask property, but I don't quite understand how it works, and most of the examples shown are images placed inside circles.
Is the mask property applicable in this situation?
I'm quite new to flash so I don't know a lot of things yet.
You can indeed use a mask.
How to programmatically create your mask
Put an occurrence of your image named myImage on the stage, and put over this occurrence a mask named myMask with the same dimensions. You can apply myMask mask to myImage using it's mask property like below:
Main Timeline
myImage.mask = myMask;
function mouseMoveHandler(e:MouseEvent):void {
myMask.height = myImage.y - e.stageY;
}
stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler);
You have just to adapt this code to your animation, in the function where you click your button.
I got it working now, many THANKS #VC.One. heres how I did it.
Imported img-2 to stage, converted it into symbol(type:Movie Clip), assigned instance name: img2_mc.
I created a new layer for the mask, drawn a rectangle using rectangle tool, converted it also to symbol(type:Movie Clip), assigned instance name: mask_mc.
Then applied the mask to img2_mc.
/* the code */
img2_mc.mask = mask_mc;
function onEnterFrame(event:Event):void{
var volumeKnob_y = volSliderKnobOn.y + 12; // adjust it to the center of the knob
mask_mc.height = volumeKnob_y;
}
I have myself a movieclip that has multiple images in, I want to be able to use AS3
to change the Hue and Saturation so the client can choose a colour and it will change the colour of the movieclip to their settings.
I have tried this
var my_color:ColorTransform = new ColorTransform();
my_color.color = 0x550000;
tempPlayer.transform.colorTransform = my_color;
But the movieclip just becomes completely red, I just want to be able to add a touch of colour, and then make the colour stand out a bit using AS3. Basically something like this
but from grey to one colour
Canvas
For saturation it gets a little more complicated than the traditional ColorTransform. Often, you will need to use ColorMatrixFilter.
This feature is quite complicated, but this blog post describes the process quite well and gives you code for a couple common effects.
That said, you can add just a little color to an object with ColorTransform by using the *Offset and *Multiplier properties like greenOffset and redMultiplier. This lets you offset the red, green or blue values a little to give different effects.
I am trying to understand masks in actionscript..Everything seems to make sense to me but one part of the code
function mouseM(event:MouseEvent):void {
if (mouseclick == 1) {
mask_mc.graphics.beginFill(0x000000);
mask_mc.graphics.drawEllipse(mouseX, mouseY, 70, 60);
mask_mc.graphics.endFill();
}
}
I am not sure how to exactly ask this question but here it goes. why does the mask have "begin fill" with a black color? wouldn't that paint the the image in black (I know it doesn't, it just reveals it)? what is the exact function of beginfill (besides revealing the image lool)? like how does it exactly work? sorry if it sounds ridiculously off.. but that part of the code was really screwing me up in understanding masks
What you are doing is drawing a shape to be used as a mask. In this case, a circle.
It doesn't matter what colour it is as Flash is only interested in the shape of the mask, not the colour.
Once the circle is drawn, Flash checks what part of the circle overlap the object you're masking so that every pixel the circle is not covering will be invisible. I guess it should really be called an anti-mask as the circle dictates which parts of your image wont be masked but it's just become the general convention to call the circle (or whatever shape you use) the mask.
Again, you're just creating a shape to be used as a mask. Setting the colour is just so the object can essentially exist.. because you can't exactly have a transparent circle.
Feel free to change the colour to anything and you'll see it makes no difference, the shape is all that matters.
I'm trying to mask a movieclip using a mask created with AS3 but it changes the color of the movieclip being masked. I would like the mask to not change the color of the masked movieclip. Here is my code:
mask_mc.mask=masked_mc;
drawMask();
function drawMask():void {
mask_mc.graphics.clear();
mask_mc.graphics.beginFill(0x000000,1);
mask_mc.graphics.drawRect(0,0,750,250);
mask_mc.graphics.endFill();
}
The masked movieclip becomes the same color as the color defined in beginFill. In the example above, masked_mc turns black (as defined in beginFill). Removing beginFill masked everything and revealed nothing. I've not found anyone else having this problem. Perhaps I going about this all wrong. Thanks in advance for any help on masking with AS3 without changing the color of the movieclips being masked.
You also have to add the mask into the display list :
SomeClip.addChild(masked_mc)
and i see that you are drawing on your clip and not on your mask so it may explain the color you see :
var g:Graphics = masked_mc.graphics
g.clear()
g.beginFill(0x000000,1)
g.drawRect(0,0,750,250)
g.endFill()