Abstract

Geometric computing has recently found a new field of applications, namely the various geometric problems which lie at the heart of rationalization and construction-aware design processes of freeform architecture. We report on our work in this area, dealing with meshes with planar faces and meshes which allow multilayer constructions (which is related to discrete surfaces and their curvatures), triangles meshes with circle-packing properties (which is related to conformal uniformization), and with the paneling problem. We emphasize the combination of numerical optimization and geometric knowledge.

Highlights

  • By serendipity at the same point in time where the first Ph.D. students started their work in this project, a whole new direction of research in applied geometry turned up: meshes and three-dimensional geometric structures which are relevant for rationalization and construction-aware design in freeform architecture

  • For a quadrilateral mesh this is different, and we demonstrate an example which has been built: The outer skin of the Yas Island hotel in Abu Dhabi which was completed in 2009 exhibits a quadrilateral mesh with non-planar faces which are not covered by glass in a watertight way

  • Design of freeform architecture does not work such that an amorphous ‘shape’ is created, and this shape is subsequently approximated by a PQ mesh for the purpose of making a steel-glass structure

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Summary

Background

By serendipity at the same point in time where the first Ph.D. students started their work in this project, a whole new direction of research in applied geometry turned up: meshes and three-dimensional geometric structures which are relevant for rationalization and construction-aware design in freeform architecture. It turned out to be fruitful and rewarding, and it is a topic which perfectly fits the heading of ‘Industrial Geometry’ It seems that everybody who is in the business of realizing freeform architectural designs as a steel-glass construction, or in concrete, or by means of a wooden paneling, quickly encounters the limits of the tools which are commercially available. We were able to expand knowledge in this direction by applying geometry, differential geometry, and geometric algorithms to some of those problems. It is important to know that in many cases optimization without additional geometric knowledge (utilized, for example, by way of initialization) does not succeed

Torsion-free nodes
Meshes with planar faces
Meshes with offsets
Curvatures of polyhedral surfaces
Conformal uniformization
Circle-packing meshes
Discrete conformal mappings
The paneling problem
Global panel optimization
Wooden panels: level set methods
Segmentation: image processing methods

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