![]() Each character that matches a left-hand side of a rule in the original has been replaced by the corresponding right-hand side of that same rule. Notice that each line represents a new transformation for entire string. The rules are of the form:ĪBBAB Apply Rule 2 to B, Rule 1 to A, and Rule 2 to B To begin, we will look at an example set of rules: AĮach rule set contains an axiom which represents the starting point in the transformations that will follow. Our plan is to let these instructions direct a turtle as it draws a picture. After a number of these string transformationsĪre complete, the string contains a set of instructions. The rules of an L-system are really a set of instructions for transforming In our case, we are going to use them to specify the rules for drawing pictures. Specify the rules for all kinds of interesting patterns. You can think of L-systems as containing the instructions for howĪ single cell can grow into a complex organism. L-systems were designed to model the growth of biological Provides a mathematical description of plant growth known as an ![]() ![]() In 1968 Aristid Lindenmayer, a biologist, invented a formal system that Even though it seems like we are doing something that is much more complex, the basic processing is the same as was shown in the previous sections. ![]() This section describes a much more interesting example of string iteration and the accumulator pattern. ![]()
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