ActionScript 3.0 :: BitmapData's Draw() Method Also Draws Objects With 0 Alpha
Mar 17, 2011
I am drawing a flash sprite on a BitmapData using its draw() method. This sprite has some nested objects with 0 alpha, yet the draw() method draws them on the bitmap data.
I think it has to do with the color transform I am using, but I have no idea how to change it to achieve the effect I want.
The color transform is the following:
Code:
new ColorTransform(1, 1, 1, 1, 255, 255, 255, 255);
I am using these values in order for the Bitmap to have white pixels wherever the object was, and black where there is nothing. The draw() also draws my alpha = 0 objects in white as well.
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Code:
ActionScript Code:
var destImg:BitmapData = new BitmapData(_root.picW,_root.picH,false);
destImg.draw( mcPicture );
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Mar 18, 2009
I am using the draw() method of the BitmapData to encode a jpeg of part of the image. Now this should be easy enough given the object I want to draw to the bitmap is on the stage at design time so I know its location and dimetions exactly! Heres the code I have in place.
Code:
var myBitmapSource:BitmapData = new BitmapData ( street.width, street.height, false, 0x333333);
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I know for a FACT that no part of the street clip I am drawing out is in negative space, and it's registration is (0,0). However, it cuts off A lot of the top of my image. y=5 in the above rectangle is where I need the top to be, but it cuts the top off of the image... even if I change it to 0, it has no effect.
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Oct 2, 2009
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[Code]...
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looks like this:
_________________________
| |
| TRANSPARENT PIXELS |
|_________________________|
| |
| IMAGE |
| |
| |
| |
| |
| |
| |
|_________________________|
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i have the following situation:
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one png with an alpha channel (supposed to serve only as a mask)
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i am trying like this:
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now the borders get cut off fine, but i get a black background, since the drawing layer has an alpha between the drawn lines (and it should remain like this) and the mask bitmap has an alpha outside the shape. so naturally the mask's alpha replaces the drawing layer's.
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ADDITION:
when trying to use a mask i tried it with
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private const BodyMask:Class;
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[Code].....
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