Spring 2013 – Page 19

Seating assignment – grasshopper modelling

The curves were lofted to form a polysurface. When lofted in Rhino it generated several open polysurfaces instead of one single surface.

A single surface was generated by lofting the surfaces in grasshopper. Then iso-curve and pipe components were used to generate this iteration.

However it didnt work too well. Back to a framework of two 3 curves and definitions using line segment and pipe components.

The number of spokes or ribs, their thickness, number and orientation are varied using sliders. The height and width of the seating is varied along the z axis.

coconut chair- progress

Progress on the coconut chair– can’t tell if it’s a progress really, but everything is newly referenced to the points via Grasshopper. Due to its surprising complexity on the chair, I had to create new triangular surfaces, referenced that, and now I am trying to figure out the surface to move along with the commands created…wish me luck.

Seating – Rhino modelling

First the wireframe was constructed in Rhino approximately as per dimensions.

Then each of the curves was swept with a circular profile.

However the junction between the curves was generated clean. The swept profiles intersected each other.

This version was generated with the pipe tool.

Arper Leaf Chair

Seating Assignment 1

The Arper leaf Chair is designed by Lievore Altherr Molina. It was inspired by the structure of a leaf and is the design interpretation of nature with a simple yet comfortable seat made from steel.

This is the base for my first assignment. The parameters that I intend to work with are

the thickness of the ribs and frame
the number of ribs or spokes
the height/dimensions of the seat

parametric seating part 2 – progress

I lost a lot of hair during the past week, still feel very confused…

I followed a tutorial vedio on vimeo to do the box morphing, this method can only change the overall propotion.

I tried to use truss on my chair, doesn’t work well.

This one seems work, I just need to add more frames for it.

Coconut Chair Progress

Here are some images of the coconut chair (by George Nelson) and the Rhino modeled chair.
First attempt was through modeling a solid and using boolean (failed), and the second attempt was through making the planes through curves that extruded to a solid cap.
Unfortunately, the way I built the chair in Rhino does not allow me to manipulate in grasshopper (another fail)… Instead of rebuilding the Rhino model again, I will try to pick points and planes on the model through grasshopper and manipulate the following 5 design drivers:
1) extension of the three corners
2) amount of legs
3) width of the chair
4) height of the back of the chair
5) thickness of the chair

Parametric Seating Progress in Grasshopper- Spring 2013

Here is part of my progress. I’m still having problems of how to offset the complete figure in grasshopper?

parametric seating part 1 – Hugging chair

I chose my previous design project for this assignment. This is a reading chair, designed for prolonged, relaxed use.its asymmetrical, curving wings enclose the user in a space that feels secure: one feels embraced by the chair, or perhaps held in a large hand. One feels almost taken care of by the chair. It’s a space that helps the user achieve a special level of calmness and relaxation.

I built a new digital model based on the original hand made prototype.

The five design drivers focus on proportion, curve, multi-thickness, texture and frame, to explore more possibilities of this chair design.

Parametric Seating

For the Parametric Seating Assignment, I chose to use Konstantin Grcic’s “Chair One”.

Below are several rendered views of the model I built in Rhino.

I will use Grasshopper to alter this model according to the below design drivers:

(1) HEIGHT – I will alter the height of the chair by increasing the length of the chair legs, while maintaining the distance between each of the legs on the ground.

(2) BACK TILT ANGLE – I will alter the tilt angle of the back of the chair.

(3) CUT-OUT SIZE – I will alter the sizes of the triangular cut-outs in the surface of the chair to fill in or open up the surface of the chair.

(4) SUBDIVISION – I will create a driver to subdivide each triangular cut-out into three smaller triangular cut-outs.

(5) SEAT WIDTH – I will alter the width of the seat so the chair can be transformed into a loveseat or a longer bench. I will increase the length of certain of the triangular “legs” to make the chair wider. I will set a limit for the length of these legs. I’ll use a Boolean operation to identify when that limit is reached and trigger a subdivision of the triangles that contain that leg.

– Justin Crocker

Parametric Seating Assigment Part 1 – Spring 2013

For the Parametric Seating assignment I chose the Ruth Rocker designed by David Trubridge. I like the organic form and the beauty of the simplicity functionality of the chair. For the assignment, I chose to design four drivers that will change the original characteristic. In the images above, it shown the analysis, the designed drivers and the surface model of the chair.