Midterm Project - Parametric Modeling and Physically-based Form Finding
Melbourne Recital Centre
1. Introduction
Melbourne Recital Centre is located in Melbourne, Australia. The building was designed by Ashton Raggatt McDougall and opened as a concert and recital hall as shown in Figure 1. It is the second largest auditorium for the classical music in Melbourne. [1]
Fig. 1. Melbourne Recital Centre [2]
2. Project Scope
The facade of the targeted project (Melbourne Recital Centre) is proper to be studied as a parametric modeling. Since the entire modeling is improper to meet the purpose of this class (ARCH 689), my project is concentrated on the facade of Melbourne Recital Centre. Furthermore, the use of Rhino was minimized and the use of Grasshopper was maximized for a parametric modeling. Last, I am devoted to the two-dimensional design to meet the project requirements.
3. Parametric Form for the Curved Design
The facade of the project is modeled on the Grasshopper nodes as shown in Figure 2. Each point of the facade model was taken by the Rhino model. The shape of facade is built up by the NURBS node and the NURBS curve is extruded to the Y-direction. Thus, the thickness of facade can be controlled by the slide node as shown in Figure 3.
Fig. 2. Nodes for Building Contour
Fig. 3. Extruded Inside and Outside Facade Model
Since the project has the unique contours for the architectural aesthetics, the inside and outside facade points are needed to be defined through the designed boundary for the algorithmic model or the parametric model. The inside points and outside points can be classified by the created nodes as shown in Figure 4 [3].
Fig. 4. Nodes for the Reference Points of Facade
The determined points of the glass facade are shown in Figure 5 and 6. The points will be the reference points for the parametric modeling with respect to the designer's intent.
Fig. 5. Inside Reference Points of Glass Part Facade
Fig. 6. Outside Reference Points of Glass Part Facade
The determined points of the concrete structure part are shown in Figure 7 and 8. The points will be the reference points for the parametric modeling with respect to the designer's intent as well.
Fig. 7. Inside Reference Points of Concrete Structure Part
Fig. 8. Outside Reference Point of Concrete Structure Part
The pipeline node is added to change the exiting design as shown in Figure 9. However, the shape of facade is not distorted by the reference points.
Fig. 9. Node for the Own Design Intent to the Original Design
This is the result of the parametric design are shown in Figure 10 and Figure 11.
Fig. 10. Changed Design of Internal Facade
Fig. 11. Changed Design of External Facade
The thickness of the inside and outside facades are controlled by the designed nodes. Also, the design of facade is changed by the designed nodes as shown in Figure 12.
Fig. 12. Changed Facade Design
4. Parametric, Physically-Based Model
Since the project was focused on the two-dimensional facade, Unary Force in Kangaroo was used for the physically-based model as shown in Figure 13. The initial condition of Unary Force is as shown in Figure 14 and the deflection is as shown in Figure 15. The weight of the gravity and the numbers of knot are controlled by the parametric sliders.
Fig. 13. Parametric, Physically-Based Model with Unary Force [4]
Fig. 14. Initial Condition of Psysically-Based Model with Unary Force
Fig. 15. Deflection of Psysically-Based Model with Unary Force
5. Analyses
My analysis approach is little bit different comparing with the description of the project requirement. My analysis approach is seems like a case study to figure out the proper algorithmic design to apply the project which has a unique boundary design.
Case 1) Cellular Automata
To apply Cellular Automata for the algorithmic design of the targeted project as shown in Figure 16, the reference surface should be rectangular as shown in Figure 17. Cellular Automata is improper for the targeted project which has the unique boundary design.
Fig. 16. Cellular Automata Nodes for this Project [5]
Fig. 17. Limitation of Cellular Automata
Case 2) Voronoi
Personally, I supposed that Voronoi was the proper algorithm for this project. However, Voronoi has the limitation same as the Cellular Automata. It should has the rectangular boundary to work it well as shown in Figure 18.
Fig. 18. Limitation of Voronoi [6]
Case 3) External Database for Parametric Design (gHowl)
The 'gHowl' engine is proper to apply the project which has a unique boundary design. The user can make the own design with a unique boundary as shown in Figure 19. The user punches in the numbers and picks the cells of Microsoft Excel sheet up where the user wants to make the model to run through the designed nodes as shown in Figure 20. Also, if the user divides cells finely, the user can design the model in detail. However, the user needs to enter the data manually and it takes a long time to run it. But it is a good algorithm for the unique design with a free boundary condition as shown in Figure 21.
Fig. 19. Input Data Type for gHowl Algorithm
Fig. 20. Nodes for gHowl Algorithm [7]
Fig. 21. Free Boundary Condition Design with gHowl Algorithm
6. Project Movie
References
1. Melbourne Recital Centre, Retrieved from http://en.wikipedia.org/wiki/Melbourne_Recital_Centre, Wikipedia, (17 March 2014).
2. John Madden, Retrieved from http://john-madden.com.au/index.php/portfolio-item/mrc-mtc/, Melbourne recital Centre + MTC, (2014).
3. Grasshopper Tutorial Boundary Inclusion, Retrieved from https://www.youtube.com/watch?v=-xhgakVFUoY, (25 May 2010).
5. Cellular Automata: Support for Excitable Media Cellular Automata, Retrieved from http://morphocode.com/rabbit/, Plug-in for Grasshopper Rabbit, Morphocode, (2014)
6. Voronoi, Retrieved from http://www.grasshopper3d.com/forum/topics/3d-voronoi-4 (2014)
7. Grasshopper gHowl, Retrieved from http://www.grasshopper3d.com/group/ghowl (2014)
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