Automatically generating large urban environments based on the footprint data of buildings
SM '03 Proceedings of the eighth ACM symposium on Solid modeling and applications
Interactive procedural street modeling
ACM SIGGRAPH 2008 papers
Proceedings of Graphics Interface 2009
Sketch-Based Interfaces and Modeling (SBIM): Sketching piecewise clothoid curves
Computers and Graphics
A sketch interface to empower novices to create 3D animations
Computer Animation and Virtual Worlds - CASA' 2010 Special Issue
Metropolis procedural modeling
ACM Transactions on Graphics (TOG)
A sketch-based system for highway design
Proceedings of the Eighth Eurographics Symposium on Sketch-Based Interfaces and Modeling
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To create traffic simulations of high visual-fidelity, each component part needs to be designed and modelled in great detail. Roads can be created manually, but this can become a time-consuming and laborious process when modelling large-scale networks. Therefore, automated techniques for generating road networks efficiently and effectively, is highly desirable in both urban-planning and entertainment industries. In this paper we present a novel sketch-based tool to semi-automate the design, creation, and visualisation of road networks across both flat and undulating terrains. Our tool is guided by input sketches and a combination of prioritised constraints, including the curvature of roads, their inclination, and the volume of ground that would be displaced during construction. We introduce 'Influence Regions' which are user-specified areas of the terrain that influence the path of the roads generated, and are used to attract or repel roads to/from certain obstacles or designated areas, such as forestation, listed buildings, marshland, etc. A user study is conducted to evaluate the usability of the system and the quality of roads generated in a diverse range of scenarios. The results indicate that our system is both user-friendly and able to produce roads that are true to the user's intention.