Design Transformations for Rule-based Procedural Modeling

Lienhard, Stefan; Lau, Cindy; Müller, Pascal; Wonka, Peter; Pauly, Mark

doi:10.1111/cgf.13105

Cited by 14 publications

(8 citation statements)

References 39 publications

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“…Tracing a Pareto front is a key challenge in multi-objective and multi-disciplinary design optimization. We will not attempt an exhaustive review of all approaches such as gradient-free methods including rule-based techniques [27][28][29][30] and evolutionary algorithms [31][32][33][34][35]. Rather, we focus on a special class of algorithms that automatically generate designs on the Pareto front of multiple objectives given an initial design.…”

Section: Related Workmentioning

confidence: 99%

Exploring feasible design spaces for heterogeneous constraints

Mirzendehdel

Behandish

Nelaturi

2019

Computer-Aided Design

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We demonstrate an approach of exploring design spaces to simultaneously satisfy kinematics-and physics-based requirements. We present a classification of constraints and solvers to enable postponing optimization as far down the design workflow as possible. The solvers are organized into two broad classes of design space 'pruning' and 'exploration' by considering the types of constraints they can satisfy. We show that pointwise constraints define feasible design subspaces that can be represented and computed as first-class entities by their maximal feasible elements. The design space is pruned upfront by intersecting maximal elements, without premature optimization. To solve for other constraints, we apply topology optimization (TO), starting from the pruned feasible space. The optimization is steered by a topological sensitivity field (TSF) that measures the global changes in violation of constraints with respect to local topological punctures. The TSF for global objective functions is augmented with TSF for global constraints, and penalized/filtered to incorporate local constraints, including set constraints converted to differentiable (in)equality constraints. We demonstrate application of the proposed workflow to nontrivial examples in design and manufacturing. Among other examples, we show how to explore pruned design spaces via TO to simultaneously satisfy physics-based constraints (e.g., minimize compliance and mass) as well as kinematics-based constraints (e.g., maximize accessibility for machining).

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Section: Related Workmentioning

confidence: 99%

Exploring feasible design spaces for heterogeneous constraints

Mirzendehdel

Behandish

Nelaturi

2019

Computer-Aided Design

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“…Recently, more software products have increasingly implemented procedural modeling approaches in multifaceted urban planning environments (e.g. Vanegas et al 2009, ESRI 2016, Lienhard et al 2017. Vitins & Axhausen (2016) summarized and compared major grammar-related contributions from different disciplines and perspectives.…”

Section: Grammar-related Network Designmentioning

confidence: 99%

“…from urban or transport planning, and architecture). Low application costs encourage application of grammars in planning projects (Parish & Müller 2001;Watson et al 2008;Lienhard et al 2017); grammars can be implemented in interactive planning tools (e.g. Jacobi et al 2009;Weber et al 2009;Smelik et al 2014).…”

Section: Grammar-related Network Designmentioning

confidence: 99%

See 2 more Smart Citations

Extraction and evaluation of transportation network grammars for efficient planning applications

Vitins

Axhausen

2018

Des. Sci.

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Grammars, with their generic approach and broad application potential in many planning fields, are accepted as adaptable and efficient tools for design and planning applications, bridging design rules and technical planning requirements. This paper provides a formal introduction of grammars for effective consolidation and application, including a rule-based notation and required specification information. Two proposed grammar evaluation methods -based on technical planning knowledge and using recent computational development -foster understanding of a grammar's effects, often missing in other definitions. Knowledge gained enables efficient grammar rule application, e.g. in burgeoning planning software. This research focuses particularly on urban network design and road intersection grammars to validate proposed grammar evaluation methods. Results are specified in the proposed grammar notation with corresponding application specifications. Results generally show that network topology and intersection type choice both depend on transport mode characteristics and flow. Specifically, medium-dense gridiron networks are car-efficient in terms of travel costs and reliability at urban densities, when combined with high road and intersection capacities. Pedestrian networks ideally have higher intersection and road densities with lower capacities than car networks. Highly meshed networks improve overall travel cost efficiencies for all transport modes at various flow levels.

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Interdisciplinary AI: A Machine Learning System for Streamlining External Aesthetic and Cultural Influences in Architecture

Özel¹

2020

Architectural Intelligence

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Design Transformations for Rule-based Procedural Modeling

Cited by 14 publications

References 39 publications

Exploring feasible design spaces for heterogeneous constraints

Exploring feasible design spaces for heterogeneous constraints

Extraction and evaluation of transportation network grammars for efficient planning applications

Interdisciplinary AI: A Machine Learning System for Streamlining External Aesthetic and Cultural Influences in Architecture

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