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PODisplay SVG gradients using Flash?
 

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    <p>I'm using AS3 (Flash) to <strong>read SVG files</strong> and <strong>display</strong> them. The problem is correctly displaying a <strong>linear/radial gradient.</strong></p> <p>Following is an example of a simple <strong>linear gradient</strong> from <strong>Red</strong> to <strong>Blue</strong>, in SVG.</p> <pre><code>&lt;linearGradient id="GRADIENT_1" gradientUnits="userSpaceOnUse" x1="107.3938" y1="515.5684" x2="105.2488" y2="428.8614" gradientTransform="matrix(0.9988 0.0485 0.0485 -0.9988 0.8489 711.6634)"&gt; &lt;stop offset="0" style="stop-color:red"/&gt; &lt;stop offset="1" style="stop-color:blue"/&gt; &lt;/linearGradient&gt; </code></pre> <p>I've been able to read the <strong>colors</strong> from the gradient (stop's styles), and their <strong>spacing</strong> through the gradient (stop's offsets).</p> <p>Okay, so now I've got a <strong>nice gradient</strong> with the <strong>right colors</strong> and <strong>right amount of space</strong> between them, but with <strong>NO rotation or scale</strong>, and its <strong>off position!</strong>.</p> <p>The answer is to feed <a href="http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/flash/geom/Matrix.html#createGradientBox()" rel="nofollow noreferrer">a <strong>Matrix</strong></a> into Flash's gradient function.</p> <hr> <h3>Method 1: Use the supplied matrix</h3> <p>The <strong><a href="http://www.w3.org/TR/SVG11/coords.html#TransformMatrixDefined" rel="nofollow noreferrer">Matrix supplied</a></strong> by SVG, <a href="http://www.w3.org/TR/SVG11/coords.html#TransformAttribute" rel="nofollow noreferrer"><strong>gradientTransform="matrix(a,b,c,d,e,f)"</strong></a> appears to be effectively useless since when you feed that <strong>matrix</strong> into Flash's <a href="http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/flash/display/Graphics.html#beginGradientFill()" rel="nofollow noreferrer"><strong>beginGradientFill() function</strong></a>, it displays the gradient <strong>stretched</strong> over the shape so much so only the center color of the gradient is visible, like a solid fill.</p> <hr> <h3>Method 2: Generate a Matrix using 2 gradient points</h3> <ul> <li>The <strong>x1, y1</strong> tags might be the point on screen where the <strong>gradient begins at.</strong></li> <li>The <strong>x2, y2</strong> tags, might be the point on screen where the <strong>gradient ends.</strong></li> </ul> <p>When I say "2 gradient points", I'm referring to x1,y1 and x2,y2, which are mostly telling you <strong>where on the shape</strong> does the <strong>gradient start &amp; end.</strong></p> <p>There's the <a href="http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/flash/geom/Matrix.html#createGradientBox()" rel="nofollow noreferrer"><strong>Matrix.createGradientBox()</strong> function</a> which creates a matrix for use with gradients, but the parameters are <strong>very different than what SVG</strong> gives me. It wants:</p> <ol> <li><strong>Width</strong> --- used the relative distance between the 2 gradient points here (X axis)</li> <li><strong>Height</strong> --- used the relative distance between the 2 gradient points here (Y axis), <em>but got incorrect results</em> --- also tried using the <strong>distance between the 2 gradient points</strong> here, but I didn't know what to fill into Width!</li> <li><strong>Rotation angle</strong> -- used the angle of the 2 gradient points, in radians, <em>with incorrect results!</em></li> <li><strong>Translation x</strong> -- tried 1st gradient point's X, also tried 0, <em>with incorrect results!</em></li> <li><strong>Translation y</strong> -- tried 1st gradient point's Y, also tried 0, <em>with incorrect results!</em></li> </ol> <hr> <h2>What SVG data can I use to generate a gradient Matrix for Flash?</h2> <p><strong>(Look at the SVG snippet above,</strong> that's all the data I have describing the gradient)</p>
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