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-# SquiggleCam
-Web Based implementation of SquiggleDraw algorithm
+# Description
+
+Web Based implementation of [SquiggleDraw algorithm](https://github.com/gwygonik/SquiggleDraw ), originally implemented by Gregg Wygonik.
+
+The online version of this project takes a picture from your webcam and turns it into plotter-drawable SVG file.
+
+Here's an example of output image generated with this tool:
+
+![Image of SquiggleCam in use](https://raw.githubusercontent.com/msurguy/SquiggleCam/master/examples/description.jpg "Image of SquiggleCam output")
+
+And here's my project that uses this tool:
+
+![Video of SquiggleCam in use](https://raw.githubusercontent.com/msurguy/SquiggleCam/master/examples/video.jpg "Video of SquiggleCam in use")
+
+
+I'll soon update the code to be able to upload images as well as take webcam pictures.
+
+# Installation and running
+
+Clone or download this repo, then run this command to get all dependencies installed locally:
+```
+npm install
+```
+
+Then, run this command to watch for changes and to launch the HTML page in the browser:
+```
+npm run watch
+```
+
+The project uses [Laravel Mix](https://github.com/JeffreyWay/laravel-mix) for ES6 conversion, file watching, code compression and development process.
+
+# Algorithm
+
+The algorithm processes the image in the following way:
+
+```
+Retrieve photo as an array of pixels IMAGE
+Set desired number of horizontal lines as LINE_COUNT
+Set desired number of vertical spacing as SPACING
+Set desired line amplitude as AMPLITUDE
+Set desired line rotation frequency as FREQUENCY
+For y :=0 to image height step image height / LINE_COUNT do
+	Set startx := 0
+	Set starty := y
+	Create a set of coordinates as [startx, starty]
+	For x := 1 to image width step SPACING do
+		Get brightness br of the current pixel as average of r,g,b values
+		Set r := (255 - br) / LINE_COUNT * AMPLITUDE
+		Set a := (255 - br) / FREQUENCY
+		Create a set of coordinates as [x, y + Math.sin(a) * r]
+Pass the resulting array of coordinates to rendering application
+```
+
+The rendering layer is based on [D3.js](https://d3js.org/) library which takes an array of points and creates SVG lines that connect those points.
+
+# Using the output images
+
+The output SVG file generated with this tool can be uploaded to SVG -> GCODE (or similar) converter in order to be plotted on a pen plotter or engraved on a laser cutter.
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