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    <p>I worked out a solution using two generated images. The first one <code>imgText</code> contains only text (white) in front of black background. The second one <code>imgMask</code>functions as mask and therefore contains the screen line pattern. It's fine to generate the first (text image) only once within the <code>setup()</code> part; because your type doesn't change/move or transform. The mask image has to be updated every frame if you want to achieve the effect of "scanning" lines. This happens every <code>draw()</code> loop through the shift of the <code>offset</code> parameter. </p> <p>The rest is pretty basic; clear the background every frame and draw the inverted version of <code>imgText</code> before you display the actual masked image. </p> <pre><code> PImage imgText; PImage imgMask; PFont font; int barHeight = 20; float offset = 0; float offsetTick = 0.3; void setup () { size (320, 240); noStroke (); smooth (); font = createFont ("Helvetica-Bold.vlw", 18); // Create new image containing only // the white text infront of an empty // black sketch background background (0); fill (255); textFont (font); textAlign (CENTER); text ("Text goes here", width/2, height/2); imgText = createImage (width, height, ARGB); copySketchIntoImage (imgText); // Create empty mask image imgMask = createImage (width, height, ARGB); } void draw () { // Move the scan lines further down // by increasing offset offset += offsetTick; if (offset &gt; barHeight * 2) { offset = 0; } // Update the text mask image updateMask (offset); imgText.mask (imgMask); // Draw the inverted background+text background (255); fill (0); text ("Text goes here", width/2, height/2); // Display the masked version of the // text image above the inverted background image (imgText, 0, 0); } void updateMask (float theOffset) { background (0); fill (255); for (float i=theOffset - barHeight; i &lt; height; i += barHeight * 2) { rect (0, i, width, barHeight); } copySketchIntoImage (imgMask); } // Method to copy all sketch pixels // into an existing PImage. void copySketchIntoImage (PImage theDestImage) { loadPixels (); theDestImage.loadPixels (); for (int i=0; i &lt; pixels.length; i++) { theDestImage.pixels[i] = pixels[i]; } theDestImage.updatePixels (); } </code></pre>
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    1. USsteffenfiedler
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    1. COThank you so much for this. Works perfectly :)
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      1. UStamago
 

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