One of the most hard thing to traslate when creating pdf documents from existing flash movies is indeed the gradient matrix.
Not only because pdf and flash have 2 different coordinates system and because the gradient matrix is applied in 2 different ways, but also if you want to convert gradient with transparent colors inside.
This is the swf example. Click on the sprite to start the animation. It will rotate and translate both the sprite and its gradient matrix, then click again to stop the animation and create the pdf file at that frame.
SWF HERE
In order to create the correct gradient matrix with the right position and rotation in
purePDF I’ve used the
PdfShading.complexAxial static method in this way:
var cb_shading: PdfShading = PdfShading.complexAxial( writer, top_left.x, top_left.y, top_right.x, top_right.y, cb_colors, cb_ratios, true, true );
then for the alpha masking I’ve created a PdfTransparencyGroup applied to the alpha mask.
You can see my solution (which probably is not the best one, but it’s the one I discovered for now) in the code below.
[kml_flashembed movie=”/wp-content/uploads/2010/02/ExampleColorGradient2.swf” height=”300″ width=”400″ /]
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