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Using gameplay semantics to procedurally generate player-matching game worlds

Using gameplay semantics to procedurally generate player-mat...

引用

3rd Workshop on Procedural Content Generation in Games, PCG 2012, Organized in Conjunction with the Foundations of Digital Games Conference, FDG 2012

作者： Lopes, Ricardo Tutenel, Tim Bidarra, Rafael Computer Graphics and Visualization Group Delft University of Technology Mekelweg 4 2628 CD Delft Netherlands

The use of procedural content generation to support adaptive games is starting to gain momentum in current research. However, there are still many open issues to tackle, namely the reusability of methodologies. Our research focuses on reusable and generic methods for linking the procedural generation of 3D game worlds with gameplay, as measured by player modelling techniques. As the interface for that link, we propose the use of gameplay semantics, a knowledge representation technique that allows our case-based generator to match content to player models. We present and discuss the implementation of our proposed method in an existing game, Stunt Playground. Gameplay semantics is created by designers in a generic way and is then used to procedurally generate player-matching Stunt Playground game worlds, both at the design and game stage. Current results show that our approach can automatically create such adaptive game content, thus effectively bridging game world designers, procedural generation and gameplay.

关键词： Semantics

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Designing semantic game worlds

Designing semantic game worlds

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3rd Workshop on Procedural Content Generation in Games, PCG 2012, Organized in Conjunction with the Foundations of Digital Games Conference, FDG 2012

作者： Kessing, Jassin Tutenel, Tim Bidarra, Rafael Computer Graphics and Visualization Group Delft University of Technology Mekelweg 4 2628 CD Delft Netherlands

Current game worlds often fall short in providing consistency between the visual representation of the world and the way it feels, behaves, and reacts. This problem partly originates from the goal-oriented and cost-effective nature of the game development process, which mostly favors ad hoc solutions for one particular game, rather than investing in concepts like reusability and emergent gameplay. In broader terms, we observe that game worlds miss semantics, and we argue that its deployment has the potential to bring about the consistency missing in their content. Therefore, we present a novel approach aimed at enriching virtual entities in game worlds with information about their roles, how they relate to others, and how they can affect and interact with players, NPCs, and with each other. We discuss several requirements to achieve these goals, and introduce a semantic model to represent game worlds. In order to support and validate this model, we have developed Entika, a framework to facilitate the deployment of semantics during game development, as well as its maintenance during run-time. Furthermore, we briefly discuss several applications that demonstrate the power of this semantic model for game worlds. After careful evaluation of our semantic game world model and framework, we conclude that a semantically rich world representation can substantially assist designers in creating much more consistent game worlds.

关键词： Semantics

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Semantic class detectors in video genre recognition

Semantic class detectors in video genre recognition

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International Conference on computer Vision Theory and Applications, VISAPP 2012

作者： Hradiš, Michal Řeznícék, Ivo Behúň, Kamil Department of Computer Graphics and Multimedia Brno University of Technology Bozetechova 1/2 Brno Czech Republic

ISBN: (纸本)9789898565037

This paper presents our approach to video genre recognition which we developed for MediaEval 2011 evaluation. We treat the genre recognition task as a classification problem. We encode visual information in standard way using local features and Bag of Word representation. Audio channel is parameterized in similar way starting from its spectrogram. Further, we exploit available automatic speech transcripts and user generated meta-data for which we compute BOW representations as well. It is reasonable to expect that semantic content of a video is strongly related to its genre, and if this semantic information was available it would make genre recognition simpler and more reliable. To this end, we used annotations for 345 semantic classes from TRECVID 2011 semantic indexing task to train semantic class detectors. Responses of these detectors were then used as features for genre recognition. The paper explains the approach in detail, it shows relative performance of the individual features and their combinations measured on MediaEval 2011 genre recognition dataset, and it sketches possible future research. The results show that, although, meta-data is more informative compared to the content-based features, results are improved by adding content-based information to the meta-data. Despite the fact that the semantic detectors were trained on completely different dataset, using them as feature extractors on the target dataset provides better result than the original low-level audio and video features.

关键词： Metadata

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A method for specifying semantics of large sets of 3D models

A method for specifying semantics of large sets of 3D models

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International Conference on computer graphics Theory and Applications, GRAPP 2012 and International Conference on Information Visualization Theory and Applications, IVAPP 2012

作者： Zhang, Xin Tutenel, Tim Mo, Rong Bidarra, Rafael Bronsvoort, Willem F. Northwestern Polytechnical University Xi'an China Computer Graphics Group Delft University of Technology Delft Netherlands

ISBN: (纸本)9789898565020

Semantics of 3D models is playing a crucial role in games and simulations. In this paper we propose a framework to specify semantics of large sets of 3D models with minimal human involvement. The framework consists of three modules: classification, segmentation and annotation. We associate a few models with tags representing their classes and classify the other models automatically. Once all models have been classified in different groups, we take a certain number of models as template models in each group, and segment these template models interactively. We then use the segmentation method (and parameters) of the template models to segment the rest of the models of the same group automatically. We annotate the interactively segmented parts and use an attributed adjacency graph to represent them. Automatic annotation of the rest of the models is then performed by subgraph matching. Experiments show that the proposed framework can effectively specify semantics of large sets of 3D models.

关键词： Semantics

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Applying (hybrid) metaheuristics to fuel consumption optimization of hybrid electric vehicles

Applying (hybrid) metaheuristics to fuel consumption optimiz...

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EvoCOMNET, EvoCOMPLEX, EvoFIN, EvoGAMES, EvoHOT, EvoIASP, EvoNUM, EvoPAR, EvoRISK, EvoSTIM, and EvoSTOC, EvoApplications 2012

作者： Krenek, Thorsten Ruthmair, Mario Raidl, Günther R. Planer, Michael Institute for Powertrains and Automotive Technology Vienna University of Technology Vienna Austria Institute of Computer Graphics and Algorithms Vienna University of Technology Vienna Austria

ISBN: (纸本)9783642291777

This work deals with the application of metaheuristics to the fuel consumption minimization problem of hybrid electric vehicles (HEV) considering exactly specified driving cycles. A genetic algorithm, a downhill-simplex method and an algorithm based on swarm intelligence are used to find appropriate parameter values aiming at fuel consumption minimization. Finally, the individual metaheuristics are combined to a hybrid optimization algorithm taking into account the strengths and weaknesses of the single procedures. Due to the required time-consuming simulations it is crucial to keep the number of candidate solutions to be evaluated low. This is partly achieved by starting the heuristic search with already meaningful solutions identified by a Monte-Carlo procedure. Experimental results indicate that the implemented hybrid algorithm achieves better results than previously existing optimization methods on a simplified HEV model. © 2012 Springer-Verlag.

关键词： Genetic algorithms

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A runtime cache for interactive procedural modeling

A runtime cache for interactive procedural modeling

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作者： Reiner, Tim Lefebvre, Sylvain Diener, Lorenz García, Ismael Jobard, Bruno Dachsbacher, Carsten Computer Graphics Group Karlsruhe Institute of Technology Germany ALICE Team INRIA Nancy Grand-Est France Geometry and Graphics Group Universitat de Girona Spain

We present an efficient runtime cache to accelerate the display of procedurally displaced and textured implicit surfaces, exploiting spatio-temporal coherence between consecutive frames. We cache evaluations of implicit textures covering a conceptually infinite space. Rotating objects, zooming onto surfaces, and locally deforming shapes now requires minor cache updates per frame and benefits from mostly cached values, avoiding expensive re-evaluations. A novel parallel hashing scheme supports arbitrarily large data records and allows for an automated deletion policy: new information may evict information no longer required from the cache, resulting in an efficient usage. This sets our solution apart from previous caching techniques, which do not dynamically adapt to view changes and interactive shape modifications. We provide a thorough analysis on cache behavior for different procedural noise functions to displace implicit base shapes, during typical modeling operations. © 2012 Elsevier Ltd. All rights reserved.

关键词： Implicit surface rendering Interactive shape modeling Parallel hashing Procedural textures Runtime cache

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A variable neighborhood search approach for the two-echelon location-routing problem

A variable neighborhood search approach for the two-echelon ...

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12th European Conference on Evolutionary Computation in Combinatorial Optimization, EvoCOP 2012

作者： Schwengerer, Martin Pirkwieser, Sandro Raidl, Günther R. Institute of Computer Graphics and Algorithms Vienna University of Technology Vienna Austria Destion - IT Consulting OG Vienna Austria

ISBN: (纸本)9783642291234

We consider the two-echelon location-routing problem (2E-LRP), a well-known problem in freight distribution arising when establishing a two-level transport system with limited capacities. The problem is a generalization of the location routing problem (LRP), involving strategic (location), tactical (allocation) and operational (routing) decisions at the same time. We present a variable neighborhood search (VNS) based on a previous successful VNS for the LRP, accordingly adapted as well as extended. The proposed algorithm provides solutions of high quality in short time, making use of seven different basic neighborhood structures parameterized with different perturbation size leading to a total of 21 specific neighborhood structures. For intensification, two consecutive local search methods are applied, optimizing the transport costs efficiently by considering only recently changed solution parts. Experimental results clearly show that our method is at least competitive regarding runtime and solution quality to other leading approaches, also improving upon several best known solutions. © 2012 Springer-Verlag.

关键词： Location

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Edit propagation via edge-aware filtering

Edit propagation via edge-aware filtering

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作者： Hu, Wei Dong, Zhao Yuan, Guo-Dong Department of Computer Science and Technology Beijing University of Chemical Technology Beijing 100028 China Program of Computer Graphics Cornell University Ithaca 14853 United States Department of Computer Science and Technology Tsinghua University Beijing 100084 China

This paper presents a novel framework for efficiently propagating the stroke-based user edits to the regions with similar colors and locations in high resolution images and videos. Our framework is based on the key observation that the edit propagation intrinsically can also be achieved by utilizing recently proposed edge-preserving filters. Therefore, instead of adopting the traditional global optimization which may involve a time-consuming solution, our algorithm propagates edits with the aid of the edge-preserve filters. Such a propagation scheme has low computational complexity and supports multiple kinds of strokes for more flexible user interactions. Further, our method can be easily and efficiently implemented in GPU. The experimental results demonstrate the efficiency and user-friendliness of our approach. © 2012 Springer Science+Business Media, LLC & Science Press. China.

关键词： Global optimization

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Classification of gothic and baroque architectural elements

Classification of gothic and baroque architectural elements

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2012 19th International Conference on Systems, Signals and Image Processing, IWSSIP 2012

作者： Shalunts, Gayane Haxhimusa, Yll Sablatnig, Robert Institute of Computer Aided Automation Computer Vision Lab. Vienna University of Technology Austria Institute of Computer Graphics and Algorithms Pattern Recognition and Image Processing Lab. Vienna University of Technology Austria

ISBN: (纸本)9783200023284

Architectural elements are the components and details of buildings. Their unique set, combination, design, construction technique form the architectural style of buildings. Building facade classification by architectural styles is viewed as a task of classifying separate architectural structural elements. In the scope of building facade architectural style classification the current paper targets the problem of classification of Gothic and Baroque architectural elements called tracery, pediment and balustrade. Since certain gradient directions dominate on the shape of each architectural element, discrimination between dominating gradients means classification of architectural elements and thus architectural styles. We use local features to describe gradient directions. Our approach is based on clustering and learning of local features and yields a high classification rate. © 2012 Institute of Telecommunica.

关键词： Classification (of information)

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Recursive Estimation of Orientation Based on the Bingham Distribution

Recursive Estimation of Orientation Based on the Bingham Dis...

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International Conference on Information Fusion

作者： Gerhard Kurz Igor Gilitschenski Simon Julier Uwe D. Hanebeck Intelligent Sensor-Actuator-Systems Laboratory (ISAS) Institute of Anthropomatics Karlsruhe Institute of Technology (KIT) Virtual Environments and Computer Graphics Group Department of Computer Science University College London (UCL)

ISBN: (纸本)9781479902842

Directional estimation is a common problem in many tracking applications. Traditional filters such as the Kalman filter perform poorly in a directional setting because they fail to take the periodic nature of the problem into account. We present a recursive filter for directional data based on the Bingham distribution in two dimensions. The proposed filter can be applied to circular filtering problems with 180 degree symmetry, i.e., rotations by 180 degrees cannot be distinguished. It is easily implemented using standard numerical techniques and is suitable for real-time applications. The presented approach is extensible to quaternions, which allow tracking arbitrary three-dimensional orientations. We evaluate our filter in a challenging scenario and compare it to a traditional Kalman filtering approach.

关键词： Angular quantities Circular data Directional Statistics Recursive filtering

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