Algorithmic sketch

ALGORITHMICSKETCHBOOK

Xincen Jiang2015, SEMESTER 1

Week1 - octree

Create NURBS Surface > Using Grasshopper > Geometry > Set Multiple Geometry > Populate Geometry > Number Slider > Octree > Number Slider

Octree is a tree data structure. Applied to Grasshopper, it has a density exploration function. By proper adjust, it can generate an optimised grid density which is based on algorithmic analysis.

Octree starts with a single cube that contains all the points in it. When these points are overload, the cube is subdivided into eight smaller cubes evenly and the new cube will repeat the process mentioned above. Therefore, you cannot control the size of these boxes but manage the points number in a cube would be helpful to influence the form that octree produced. For the Sydney Opera House model, I set two number sliders. A large number of count slider, the cubes are more likely to form the shape, while group slider is just the opposite.

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SYDNEY OPERA HOUSE SHELL CREATED BY RHINO

SYDNEY OPERA HOUSE SHELL CTRATED BY OCTREE WHILE COUNT SLIDER IS 300.

SYDNEY OPERA HOUSE SHELL CTRATED BY OCTREE WHILE COUNT SLIDER IS 1000.

SYDNEY OPERA HOUSE SHELL CTRATED BY OCTREE WHILE COUNT SLIDER IS 100, GROUP NUMBER SLIDER IS 1.

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Week2 - KANGAROO

As a physics imitator, Kangaroo is useful for design modelling. It is inspired by the creation of masonry arches. When a chain is hanging freely, it is pure tension. But if you flip it over, it will be a pure compression form which is perfect for the arch. And the chain net like what we are using now is a further developed product of the chain.

By doing practice this week, I find Kangaroo is very flexible and natural. It simulates the natural wind gravity and by controlling force volume and direction, you can create a feasible model you want. It is an impressive tool that allows designers to learn from nature and brings design work closer to nature.

KEEP THE REST OF DATA SAME, JUST CHANGING FORCE UP, DOWN AND DIAGONAL.

KEEP REST OF THE DATA SAME, JUST CHANGING THE WIND FORCE TO 0.25, 0.5, 0.75 AND 1.

ORIGINAL MESH WITH A FORCE ARROW.

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