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| algorithmic_botany [2008-11-29 13:42] – nik | algorithmic_botany [2009-03-05 17:52] – 81.188.78.24 | ||
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| ====Stochastic L-systems ==== | ====Stochastic L-systems ==== | ||
| * variations & randomness | * variations & randomness | ||
| - | ==== Context-sensitive L-systems | + | |
| + | ==== Context-sensitive L-systems | ||
| * symbol replacement dep. on context, or previous states | * symbol replacement dep. on context, or previous states | ||
| * can be used to model signal propogation | * can be used to model signal propogation | ||
| + | |||
| ==== Parametric L-systems ==== | ==== Parametric L-systems ==== | ||
| * elements can be parameterised, | * elements can be parameterised, | ||
| Line 45: | Line 47: | ||
| * complete l-system (geometric info, growth rates/ | * complete l-system (geometric info, growth rates/ | ||
| * compound flowering structures (inflorescences) | * compound flowering structures (inflorescences) | ||
| - | * Phyllotaxis. In order to describe the pattern of florets (or seeds) in a sunflower head, | + | * Phyllotaxis. In order to describe the pattern of florets (or seeds) in a sunflower head, Vogel proposed the formula φ=n∗137.5◦, |
| - | Vogel proposed the formula φ=n∗137.5◦, | + | |
| * surface models | * surface models | ||
| * the shape as well as size of plant organs may change over time | * the shape as well as size of plant organs may change over time | ||
| * leaf types | * leaf types | ||
| + | |||
| ====animation (ABOP 6)==== | ====animation (ABOP 6)==== | ||
| * The original formalism of L-systems provides a model of development that is discrete both in time and space. | * The original formalism of L-systems provides a model of development that is discrete both in time and space. | ||
| Line 58: | Line 60: | ||
| * model states are still known only in discrete time intervals. | * model states are still known only in discrete time intervals. | ||
| ==== Timed DOL systems==== | ==== Timed DOL systems==== | ||
| - | * expression of production rules is still discrete, yet each cell has its own ' | + | * expression of production rules is still discrete, yet each cell has its own ' |
| * symbols represent cells that elongate during their lifetime and divide upon reaching terminal age. | * symbols represent cells that elongate during their lifetime and divide upon reaching terminal age. | ||
| - | * effect of aging, and gradual development can be modelled | + | * effect of aging, and gradual development can be modeled |
| * ' | * ' | ||
| + | |||
| ==== open L-systems==== | ==== open L-systems==== | ||
| + | * " | ||
| * [x.ref] | * [x.ref] | ||
| Line 75: | Line 79: | ||
| ====demos==== | ====demos==== | ||
| * http:// | * http:// | ||
| - | * http:// | + | * http:// |
| - | * karl sims - panspermia (1990) http:// | + | * karl sims - panspermia (1990) http:// |
nik