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    TreeSketch: Interactive Procedural Modeling of Trees on a Tablet
    (The Eurographics Association, 2012) Longay, Steven; Runions, Adam; Boudon, Frédéric; Prusinkiewicz, Przemyslaw; Karan Singh and Levent Burak Kara
    TreeSketch is a system for modeling complex trees that look natural yet are creatively designed. The system integrates procedural tree generation with a multi-touch tablet interface that provides detailed control of tree form. The procedural component is based on the concept of tree self-organization and simulates competition of branches for space and light as the tree develops from a seedling. The modeler can control this process by directing growth with a procedural brush, changing parameters as the tree grows, interleaving controlled and autonomous growth, and editing generated forms. Complex trees can be created in a matter of seconds.