Ivy Generator is an open source program that generates ivy around objects.
The ivy grows from one single root following different forces: a primary growth direction (the weighted average of previous growth directions), a random influence, an adhesion force towards other objects, an up-vector imitating the phototropy of plants, and finally gravity. This simple scheme reveals that the goal was not to provide a biological simulation of growing ivy but rather a simple approach to producing complex and convincing vegetation that adapts to an existing scene. The ivy generator imports and exports obj+mtl files.
Ivy Generator is available for Windows, OS X and Linux at http://graphics.uni-konstanz.de/~luft/ivy_generator/
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