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POHow do you draw like a Crayon?
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  1. POHow do you draw like a Crayon?
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    copied!<p><a href="http://www.crayonphysics.com/" rel="noreferrer">Crayon Physics Deluxe</a> is a commercial game that came out recently. Watch the video on the main link to get an idea of what I'm talking about.</p> <p>It allows you to draw shapes and have them react with proper physics. The goal is to move a ball to a star across the screen using contraptions and shapes you build.</p> <p>While the game is basically a wrapper for the popular <a href="http://www.box2d.org/" rel="noreferrer">Box2D Physics Engine</a>, it does have one feature that I'm curious about how it is implemented.</p> <p>Its drawing looks <em>very</em> much like a Crayon. You can see the texture of the crayon and as it draws it varies in thickness and darkness just like an actual crayon drawing would look like.</p> <p><a href="http://www.kloonigames.com/crayon/screenshots/crayon_small_01.jpg" rel="noreferrer">alt text http://www.kloonigames.com/crayon/screenshots/crayon_small_01.jpg</a> <a href="http://www.kloonigames.com/crayon/screenshots/crayon_small_02.jpg" rel="noreferrer">alt text http://www.kloonigames.com/crayon/screenshots/crayon_small_02.jpg</a></p> <p>The background texture is freely available <a href="http://flickr.com/photos/felipeskroski/325477721/" rel="noreferrer">here</a>.</p> <p><a href="http://img267.imageshack.us/img267/1488/crayonmh7.png" rel="noreferrer">alt text http://img267.imageshack.us/img267/1488/crayonmh7.png</a><br> <em>Close up of crayon drawing - Note the varying darkness</em></p> <p>What kind of algorithm would be used to render those lines in a way that looks like a Crayon? Is it a simple texture applied with a random thickness and darkness or is there something more going on?</p>
 

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