Posts Tagged ‘grid’

Question: I have to find out which lines don’t intersect with the louvers

Do you know a way to find the lines which are not intersecting with a surface?

The louvers are not covering the entire facade, that’s why some rays from the viewpoints pass without intersecting. I have to find those areas, where the missing rays would intersect with the volume of the tower and make the louvers wider at those areas.

The difficulty is, that the new point list of the intersecting points doesn’t match the list of the vectors(rays) from the viewpoints. I tried some stuff like find the similar points, between intersecting points with the box and the intersecting points with the louvers… and to find the equal vectors to create a boolean list… it’s all a bit tricky and not so elegant.

rhino file


Current GHX definition

I finally remembered my password for the SVN!

here is my current grasshopper definition,

The first part is about the unfolded facade of the tower part. It allows to extend it in order to have a fire escape stairway, allow to subdivide the current grid to get to a typical corian panel dimensions, etc. The  point grid indicates a lot about the material constrains: of course there is the Corian Panels size, but also how much we want to bend it: if the distance between the control points of the vertical curve get smaller, the bending radius gets smaller as well..

the second part is what allows to bend the vertical stripes according to an Image. This image should contain the following parameters: structure, sun radiation, view.

one of the next steps is to give the panels a thickness, to find the right amount of control points for the cruves, to find out whether it’s better to treat each façade indepedently, to check if it’s better to have one image for each parameter (sun, view, structure) or one image combiningall of them.. Now also the stripes are made of two mirrored curves, it is clear to me that I don’t want only this, I’m more interested in having stripes made of one strait vertical curve and one bendend one, a bit like the signal box façade of Herzog & de Meuron, just not horizontal

Hexaraeus Process

source for the reference images:

Why am I interested in cable-membrane tensile structure/skin?

1) Structural: The structure of Piraeus tower has not been protected for the 30 last years. Maybe we can’t afford adding a heavy façade. The “cable-membrane tensile structure/skin” is very light.

2) Economical: Economical situation in Greece is not at the best. Are the materials of a “cable-membrane tensile structure/skin” cheap? To be verified.. But it is possible to create large formal variations with the exact same pieces.

3) Formal: The membrane is capable of taking “complex” shapes with a very simple process

4) Comfort/Ecology: Looking at the interior photographies of the tower, they seemed pretty dark: it seems that the sunlight is not so strong. But still we know that in summer, the sun in athens is very hot, and a glass façade could result in overheating. These translucent membranes don’t block light, but offers a protection to sun rays.



The two most specific parts of a tower are the base and the top.

The base is the part of the tower in contact to the immediate context. It defines the relation between the tower and his site including neighboring buildings and public space including port and market. This relation might manifest itself for example through urban windows that create links between the building and its surrounding.

The top of the tower has a strong symbolic value. This part, visible from far away allows the building to unfold his potential as an iconic landmark. On the other hand from the top you have the best view on the port and all over the city of Athens. These two aspects demand large panoramic windows and a characteristic appearance of the façade in general.

The mass of the building in between these two2 extremes is interpreted as starting point, an initial and neutral state of the façade. Towards the 2 ends this initial neutral pattern adapts itself to the specific conditions of the base respectively the top. The differently specified façade parts flow smoothly into each other to preserve the entity of the building.

The rectangular panels in the sketches of the façade derive from:
- The current state of the facade
- The Forum 3 building by Diener & Diener which I’m analyzing for the exercises
- The interpretation of the Athenian urban fabric: grid vs. accumulation of single rectangular elements

Possible strategies of specification are:
- Dissolution of the rhythm
- Addition of another façade layer
- Change in size of the façade elements
- Enclosing additional volume


Congress Centre in St.Sebastian, Spain
The Congress Center  in St.Sebastian, Spain
completed 1999

shimmery double glased facade with visible, through-shining construction inbetween

outer shell: laminated glass elements of profile glasing/float glass, 600×2500, retained by aluminium profiles

inner shell: glass panels, sand blasterd, transluzent, 600×2500, wooden retaining ledge innerside on horizontal jointing

one single shingle of laminated glass 600×2500 mm
shingles made up the entire facade, see relation of shingles and construction grid

idea of structurize the modelling-process in a bottom-upcsystem, beginning with a single element, which can be differently modified

modelling of single shell, with several modification possibilities

extract from grasshopper file, showing modification possibilies

entire facade pattern, regular structure

grasshopper file:

analyse of openings