How to deal with multiple projects in one scope in paper.js


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Paper.js is an open source vector graphics scripting framework that runs on top of the HTML5 Canvas. It offers a clean Scene Graph / Document Object Model and a lot of powerful functionality to create and work with vector graphics and bezier curves, all neatly wrapped up in a well designed, consistent and clean programming interface.

First of all, we will see the architecture of Paper.js. When working with PaperScript, each script is run in its own scope, a PaperScope object. Each scope or context holds a row of objects that describe its state, such as a list of open projects, a reference to the active project, a list of views that each represent a canvas element, the currently active view, a list of mouse tools, the currently active tool, etc.

To explain the relation between scopes, projects, views and tools: Each scope can hold one or multiple projects, which…

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