Florian Kirsch

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We present the design and implementation of a real-time 3D graphics library for image-based Constructive Solid Geometry (CSG). This major approach of 3D modeling has not been supported by real-time computer graphics until recently. We explain two essential image-based CSG rendering algorithms, and we introduce an API that provides a compact access to their(More)
Illustrating in a sketchy manner is essential to communicate visual ideas and can be used to present and reconsider drafts and concepts in product design. This paper introduces a real-time illustration technique that sketches the design and spatial assembly of CSG models. The illustration technique generates a graphical decomposition of the CSG model into(More)
Smoking cessation is the only strategy that has shown a lasting reduction in the decline of lung function in patients with chronic obstructive pulmonary disease. This study aims to evaluate the cost-effectiveness of smoking cessation interventions in patients with chronic obstructive pulmonary disease, to assess the quality of the Markov models and to(More)
This paper presents an illustrative visualization technique that provides expressive representations of large-scale 3D city models, inspired by the tradition of artistic and cartographic visualizations typically found in bird’s-eye view and panoramic maps. We define a collection of city model components and a real-time multi-pass rendering algorithm that(More)
For the interactive construction of CSG models understanding the layout of the models is essential to ease their efficient manipulation. To comprehend position and orientation of the aggregated components of a CSG model, we need to realize its visible and occluded parts as a whole. Hence, transparency and enhanced outlines are key techniques to communicate(More)
Official lenders provide financial assistance to countries that face sovereign debt crisis. The availability of financial assistance has counteracting effects on the default incentives of governments. On the one hand, financial assistance can help to avoid defaults by bridging times of fundamental crises or resolving coordination failures among private(More)
Diabetes is the most expensive chronic disease; therefore, disease management programs (DMPs) were introduced. The aim of this review is to determine whether Markov models are adequate to evaluate the cost-effectiveness of complex interventions such as DMPs. Additionally, the quality of the models was evaluated using Philips and Caro quality appraisals. The(More)