Grasshopper::Lists, Paths, and Trees
G03 Due: April 24 at the start of class Spider-webs and Doilies Manipulating Grasshopper data-trees is hard, even when you understand the concept. This exercise is intended to allow a many "right" answers to be established, from relatively simple to more complex. See how far you can go with it. There is no starting-point file for this -- just open a blank Rhino and Grasshoper file and start in!
Floraform – an exploration of differential growth
Introducing Floraform, the latest generative design system from Nervous System. Floraform is inspired by the biomechanics of growing leaves and blooming flowers and explores the development of surfaces through differential growth. We used this system to computationally craft a new 3D-printed jewelry collection, now available on our website. Floraform is a simulation of a differentially growing elastic surface that we created to explore how biological systems create form by varying growth rates through space and time. It began with an unusual flower, Celosia cristata, and led us through a journey of cellular differentiation, discrete differential geometry, kleptoplastic sea slugs, nastic movements, and 19th century zoetropes. Table of Contents // what is differential growth | inspiration | mapping out the simulation space | digital gardening | florescence jewelry collection | what’s next | technical details | bibliography What is Differential Growth? Mapping out the simulation space 1. 2.
3D modeler / CAD softwares | wikimal
Let's start a list of useful softwares for 3D modelling / CAD, particularly free ones. Which software to chose (thanks to RealizeBxl) Easy/accessible softwares 123D : By Autodesk. : Online, now Autodesk-owned, and has a free version! Less easy Wings3D: I find it a bit... dry. online 3D modelerDesing spark Mechanical : completly free modeler Different OpenSCAD : Script-based CAD software, allows for parametric models See : for parametric objects on ThingsiverseSee: to add autocomplete in notepad++ (a must have !) 3D scanning Models processing/fixing Other 3D tools Commercial / Professional 3D tools
Matouš Stieber
How to Create Concentric Circles, Ellipses, Cardioids & More Using Straight Lines and a Circle
How to Create Concentric Circles, Ellipses, Cardioids & More Using Straight Lines and a Circle Using only a circle and straight lines, it's possible to create many different curves that are quite pleasing to look at and well known mathematically. Most of the curves that are going to be explored in this post are featured at this site, which has a program for generating them, and this site which explores some of the geometry used in creating these curves. I created all of these with a pencil and a ruler, or with the free computer program Geogebra. Concentric circles: Concentric circles showing 6 pentagrams of different colors: Ellipse: Cardioid: Heart composed of lines, partial concentric circles, and sections of a cardioid: Materials and Tools PaperRulerPen or pencilCompass for drawing circles (or images of circles or regular polygons)Protractor for marking circles with even marks Making Concentric Circles Take a circle and mark it at even intervals. Connect one mark to another mark. Repeat.
Recursion
The idea of calling one function from another immediately suggests the possibility of a function calling itself. The function-call mechanism in Java supports this possibility, which is known as recursion. Your first recursive program. The "Hello, World" for recursion is the factorial function, which is defined for positive integers n by the equation The quantity n! is easy to compute with a for loop, but an even easier method in Factorial.java is to use the following recursive function: We can trace this computation in precisely the same way that we trace any sequence of function calls. Our factorial() implementation exhibits the two main components that are required for every recursive function. The base case returns a value without making any subsequent recursive calls. Mathematical induction. Recursive programming is directly related to mathematical induction, a technique for proving facts about natural numbers. Euclid's algorithm. Towers of Hanoi. Exponential time. Gray code. Brownian bridge.
Two Immersions of the Real Projective Plane
Parametric Patterns X.1: Recursion, encore
Ha, a little recursion joke there . . . sorry I’ve been messing around more with Steven’s methods for creating recursion and finding some really simple, interesting and flexible methods that live within it. Conceptually and Actually simple to set up This is the most iconic example I can think of And damn if it isn’t easy to make! Performance: Simple and complex models Complexity in these models doesn’t effect performance in a linear manner, but it seems exponential. but this one, with only model lines but with 8 parameters (some of which don’t even get used) takes over 2 minutes to regenerate. Shared Families, using Placeholders Key to the setup of the basic recursive structure is having 2 identical unshared families, each nested into each other. Recursion with Placeholders This persistent rising to the top is interesting for recursion, as it creates an opportunity to plant a parametric seed at the root of a recursive system. Triggering Events during recursion The answer is a resounding “YES!”
Surface d'Enneper
SURFACE D'ENNEPEREnneper's surface, Ennepersche Fläche La surface d'Enneper est la surface minimale obtenue en prenant dans la paramétrisation de Weierstrass d'une telle surface : Comparer avec la surface de Scherk, autre surface minimale. © Robert FERRÉOL 2011
