Grammar based models in computer graphics
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Grammar-based models allow natural complexity to be defined with a few parameters where these models use formal languages, parallel graph grammars called L-systems, to describe natural structures algorithmically.
These models are closely related to deterministic fractals in their self-similarity. The Grammar-based models fail to meet the precise mathematical definition of a fractal model.
In the L-system, each terminal symbol represents a part of the object or a directional command to be interpreted by a 3D drawing mechanisms (turtle graphics).
A “sentence” for a particular tree would contain words describing each branch, its length, size, branching angle and when it develops, and its connection in the tree.
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