[osflash] Paul Neave's WaterEffect class working with transparencies

[João Saleiro]

In the meantime, I was able to find out the solution of the problem. The 
WaterEffect extends the AbstractEffect. On this class, the draw method 
has a line:

targetBitmap.applyFilter(sourceBitmap, rect, point, displace);

I changed sourceBitmap to  "source as BitmapData" and now it works fine. 
The problem was that the effect was always using the previous filtered 
image to generate the new one. This way, each new generated "frame" is 
created by filtering the original image, and not the previous frame.

Thanks,


João Saleiro
Chief Technology Officer
  	 
		
Tlm 1: +351 916 077 097 	Skype: joao.saleiro
Tlm 2: +351 968 203 370 	Email/MSN: joao.saleiro at webfuel.pt 
<mailto:joao.saleiro at webfuel.pt>

	
	
www.webfuel.pt <http://www.webfuel.pt>



henrik weber wrote:
> cheers joao! :)
>
> how do you create the BitmapData object from the png? i had some 
> similar issues with
> transparent png's and solved them by using it this way:
> new BitmapData(imgWidth_num, imgHeight_num, true, 0x00000000);
>
> what did the trick in my case was setting the fillColor to 
> '0x00000000'... just a shot
> in the dark though ;)
>
> hth!
>
> henrik
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> João Saleiro wrote:
>> Hey,
>>
>> I've been playing with Neave's WaterEffect class ( 
>> http://www.neave.com/webcam/api/com/neave/webcam/effects/displace/WaterEffect.html 
>> ) to animate a PNG element with transparency. I had made a just a 
>> slight change - removed the blue tint filter - and I have achieved 
>> the result available on 
>> http://www.webfuel.pt/jsaleiro/tests/TestElementoAnimado.html .
>>
>> On the top, there's the element being animated.
>> On the bottom, it's the original element.
>>
>> As you can see, it seems the filter is destroying the alpha channel 
>> of the PNG image. I've spent several hours messing with the code 
>> trying to find a solution, but I was unable to find one.
>> Any suggestions that might help?
>>
>> I am using Neave's class exactly like he uses it, but if you need the 
>> source code just let me know.
>>
>> Thanks in advance,
>> -- 
>> João Saleiro
>> Chief Technology Officer
>>   	 
>> 		
>> Tlm 1: +351 916 077 097 	Skype: joao.saleiro
>> Tlm 2: +351 968 203 370 	Email/MSN: joao.saleiro at webfuel.pt 
>> <mailto:joao.saleiro at webfuel.pt>
>>
>> 	
>> 	
>> www.webfuel.pt <http://www.webfuel.pt>
>>
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