[magick-users] gradient to transparency

[Bob Meetin]

Anthony, all,   I wrote a PHP script to generate gradients.  Looking at 
it and the output it looks fine, but color to transparent is not working. 

http://www.dottedi.biz/tools/gradient_generator.php

To test, simple delete any input from the gradient lower or use the 
color chooser to select "no color".  The php code converts either option 
to "none". I have it set to echo back the command which of course looks 
right.  Any thoughts?

Anthony Thyssen wrote:
> "Christoph P. Kukulies" on  wrote...
> | I'm seeking for a general solution to allow for producing gradients
> | from color to transparency either linearly or (even better) after 
> | some function (exp or other).
> | 
> | Reason behind is producing shadows for images or weblayouts over
> | their respective background image so that I get a smooth
> | transition from some opaque shadow to transparency.
> | 
> | Thanks a lot in advance.
> | 
> A vertical linear one is easy...
>
>    convert -size 100x100 gradient:firebrick-none gradient_trans.png
>
> Others are harder and may need either special generation or further
> processing depending on what you want. such as what fred gave you in his
> response.
>
>
>   Anthony Thyssen ( System Programmer )    <A.Thyssen at griffith.edu.au>
>