Extending space colonization tree modeling for artistic control and environmental interactions

There are a growing number of modeling techniques and algorithms for creating and modifying tree structures, both quickly and realistically. Many of these tools are part of larger software packages used for architecture or landscaping designs. In these tools the tree models are static and come from a library selection. In other areas, such as 3D modeling and design in film and animation, the tree creation tools are more open for artistic creativity and freedom of control. Much research has also been done on growing trees that are sensitive to some environment. That is, growing tree models where genus type, and natural and artificial environment factors are taken into heavy consideration. In this paper, we present an approach that facilitates user creativity while still providing a realistic response to environment factors. Our system adapts the Space Colonization Tree Modeling approach to allow for continued branch addition as well as environmental interaction. Feedback from experienced modelers who participated in a user study revealed that our approach generated the tree skeleton structures they intended and also provided realistic interaction with the environment.