## Basic algorithm At the heart of this algorithm, there is a recursive function which draws a tree branch (as a rotated black rectangle) and its sub-branches. The function calls itself recursively for the two sub-branches, using smaller branch sizes. When the width is finally too small to continue for the branch we're looking at, we draw a leaf and stop there. To randomize the tree shape, we're picking two weights from 0 to 1 for the two branches, which are adding up to 1. The weights are used to determine the sub-branch sizes and angles. * The two sub-branches should together have the same surface area as the parent when you saw through them. The surface area is split according to weight. * Big sub-branches (with big weight) grow straight ahead, while small ones grow more to the side, up to 45°. * Very small sub-branches with too small weights are cut off and not drawn anymore. ## Background The Javascript library I'm using is [Paperjs](http://paperjs.org), which I discovered through [the PaperJS talk at 35C3](https://media.ccc.de/v/35c3-1-generative-art-with-paper-js) by [bleeptrack](https://bleeptrack.de).