Browsing by Author "Piškorec, Luka"

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    Generation of geometric interpolations of building types with deep variational autoencoders
    (Cambridge University Press, 2020-12-28) de Miguel, Jaime; Eugenia Villafane, Maria; Piškorec, Luka; Sancho-Caparrini, Fernando; Department of Architecture; University of Seville; Imperial College London
    This work presents a methodology for the generation of novel 3D objects resembling wireframes of building types. These result from the reconstruction of interpolated locations within the learnt distribution of variational autoencoders (VAEs), a deep generative machine learning model based on neural networks. The data set used features a scheme for geometry representation based on a ‘connectivity map’ that is especially suited to express the wireframe objects that compose it. Additionally, the input samples are generated through ‘parametric augmentation’, a strategy proposed in this study that creates coherent variations among data by enabling a set of parameters to alter representative features on a given building type. In the experiments that are described in this paper, more than 150 k input samples belonging to two building types have been processed during the training of a VAE model. The main contribution of this paper has been to explore parametric augmentation for the generation of large data sets of 3D geometries, showcasing its problems and limitations in the context of neural networks and VAEs. Results show that the generation of interpolated hybrid geometries is a challenging task. Despite the difficulty of the endeavor, promising advances are presented.
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    Geometry > stripes > geometry a design process for architectural monocoques
    (2021) Tiitinen, Joel; Piškorec, Luka; Kotnik, Toni; ark; Taiteiden ja suunnittelun korkeakoulu; School of Arts, Design and Architecture; Piškorec, Luka
    In architecture, the use of coding has brought new possibilities to combine structure and facade into surfaces in which the necessary structure is created by the surface’s curvature. Examples of the phenomena are the monocoque structures of Marc Fornes / THEVERYMANY. Despite the studio’s wide body of work and publications, there is a limited amount of documentation on how such projects can be designed. The purpose of this thesis is to build a body of knowledge around the design of stripe-based monocoques and to implement it in a design research process that enables the design of monocoques built of polymorphic stripes. This thesis identifies the key steps and features that enable THEVERYMANY to design and build their projects. From this insight, this study first formulates a rudimentary digital design process as a proof-of-concept and, after comparison, notes the use of subdivision-based stripe generation to be more suitable for this study than agent-based stripe generation. In the second experiment, SubD modeling is introduced as a more flexible and intuitive way to model complex geometry and the striping algorithm is changed to a graph traversal algorithm to generalize the process for a wider range of geometries. The last experiment improves the issues identified in the assembly process by structuring the model in a way that streamlines the process and evaluates the use of augmented reality as an intermediary layer between the digital model and the physical model building. This thesis formulates a design process that enables the design of stripe-based monocoques and as such provides a starting point for further studies on the topic.
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    Join the bend
    (2019) Xiao, Yinan; Piškorec, Luka; Tsiptsis, Ioannis; Taiteiden ja suunnittelun korkeakoulu; School of Arts, Design and Architecture; Kotnik, Toni
    The thesis demonstrates the structural and architectural potentials in one kind of innovative structure – strip bending-active structure. By adding torsion into this structure system, different signs of curvature on the strip surface generate the hyperbolic ssurfaces whichan provide much structural stiffness for the whole system. Furthermore, the huge difference of geometric stiffness in two directions of strip’s cross section has been utilized, for the purpose to create flexible special quality. In terms of methods, making physical models is the main way for initially form finding and spacial experiences. After that, the logic of the structure system is been developed and simulated using a 6 DOF (degrees of freedom) algorithm in a physical engine. At last, a new tool of IGA (isogeometric analysis) has been introduced not only to analysis the digital model but also unify computational environment of design (CAD) and simulation (FEA).