Читать книгу Rethinking Prototyping - Группа авторов - Страница 144

We present examples of architectural projects that are yet to be realized. The examples are either based on our own architectural designs, like Fig. 8, or actual projects that have not yet seen completion like in Fig. 9. They were constructed following the algorithm of sec. 4.2 with these predefined values:

	Fig. 8	Fig. 9
Average Panel Size (in mm)	2.00 x 1000	1.00 x 1000
Number of Subdivisions	2.	1.
Max. Tangent Deviation	3.	1.
Max. Panel Deviation	0	2.

Table 1 Parameters of the examples

In Tab.1 average panel size and all other measures are in millimeters. The number of subdivisions refers to step 1 of the algorithm and sets the number of panels each strip has. The maximum tangent deviation refers to the size of the neighborhood in step 2, in which one looks for parallel tangents. The maximum panel deviation is the threshold of step 6 and defines how far two consecutive panels can be apart; this number will be lower in practice because of cold bending.

Fig. 8 shows an architectural study where the curve network can be divided such that the base curves are ridges and the target curves valleys.

The algorithm works very well here because neighboring strips meet almost at a right angle, which makes intersecting them easier. Note that this design could also be built with planar panels, but then appearance of the reflection lines would be completely different.

The last example in Fig. 9 is an actual project, where the new free-form design serves as an extension to a historical building. Note that the curve network does not directly follow the main curvature lines and yet the algorithm gives good results. The main difference to the example in Fig. 8 lies in the fact that two adjacent strips meet in a very obtuse angle, thus trimming with an auxiliary surface (see the last paragraph of sec. 4.2) is necessary.

Fig. 9 This architectural design is a modern extension of a historical building. All glass elements are conical panels, aligned with the surface’s border.