‘organic case studies’ Posts:

Cape Sundew

DLA: pattern becomes structure

I modified the 3D DLA VB component in order to get a list of lines between each new point and it’s neighbour. The starting poins lies on the xy-plane. Every new point is positionned one level higher in z-direction than his neighbouring point, once it has found one. That means every branch is growing upwards.

Animation of the growth

GH definition
VB component

CS Coral II

To get more element to interpret the case study in architecture, here is an extend study of Coral.

For understanding its organization and geometry, one type of coral is chosen: Star Coral.

We can see 2 main layers: Skeleton and Organism.

The organism becomes inside of the skeleton and then this organic parts move their tentacles to get some preys.

This kind of movement create different type of opening.

Then the skeleton is composed by a series of polygons.

We get some  quadrilaterals, pentagons, hexagons, heptagons, octagons.

If we calculate an average of these geometry, we get exactly a hexagon.

The base of the coral is made by a hexagon system.

Its particularity, which is the fusion and dissociation, create a complex organization of many kind of polygon from this hexagon system.

Another aspect of polygonal grid organization is each points have 3 lines.

Focus on the organic layer, we can see another type of structure.

The composition appears like a concentration to one point which is the pore.

Lichen

Presentation slides

While analysing the lichen’s morphology we found the process of Diffusion-limited aggregation (DLA) defined by Leonard M. Sander and Thomas Witten in the year 1981. This algorhythm creates a specific pattern of particles. It starts with a single particle, whose position has to be defined. Each new particle is moving randomly within a given field and joins the already existing particles if it gets close enough.

DLA-simulation from The Computational Science Education Reference Desk (CSERD)

Our translaiten into parametric design

flowchart for the following script

In the two following GIFF-animations you can see the same amount of particles in two different areas. If they are growing in an area of 50×50 the result is much denser than in the one of 100×100.

klick to see the growth of the simulation in a field of 50x50 with 300 paricles

klick to see the growth of the simulation in a field of 100x100 with 300 paricles

klick to see the growth of the simulation in 3D

2D GH definition
VB-component script_2D

3D GH definition
VB-component script_3D

CS_Glass sponge_Introduction

Our first presentation is mainly a synthesis of the following article:

Hierarchical assembly of the siliceous skeletal lattice of the hexactinellid sponge Euplectella aspergillum/ Journal of Structural Biology 158 (2007), pages 93–106.

Most of the following informations and illustrations are directly taken from it.

For the GH definition click here

J Struct Biol. 2007 Apr;158(1):93-106. Epub 2006 Nov 10.

Hierarchical assembly of the siliceous skeletal lattice of the hexactinellid sponge Euplectella aspergillum.

Weaver JC, Aizenberg J, Fantner GE, Kisailus D, Woesz A, Allen P, Fields K, Porter MJ, Zok FW, Hansma PK, Fratzl P, Morse DE.

Department of Molecular, Cellular and Developmental Biology, Institute for Collaborative Biotechnologies, and the Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA.