An algorithm to generate minimal SVG shadow paths from SVG paths.
Note that quadratic paths aka Q and q, smooth quadratic curve to aka T and t, and smooth cubic curve to aka S and s are not supported. They could be supported though and the code is partially there. Wasn't part of my requirements.
Also while it could be supported I treat paths that duplicate points as invalid. If you pass in a path that duplicates points you'll see the shadow clip through subpaths. This can be fixed by removing such paths after the parsing step or fixing the SVG path to not do that which is more ideal.
svgshadow.js - Contains the core algorithms. Specifically PathToSVGShadowPath(svgPath, width, height) takes in an SVG path as a string and outputs an SVG shadow path. The light direction is hardcoded to point from the top left to the bottom right. This code has not been tested with any other light direction nor was it designed to be generic. It is fragile, but a lot of work has been done to minimize floating point errors to generate minimal SVG shadow paths.
index.html - Contains tests that use Material Design Icons
icons.txt - The test icons
