Alejandro Ramírez

University of Alberta

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Vadim Bulitko

University of Alberta

Juan Camilo García

University of Atlántico

Herbert Dueńas

Universidad Nacional de Colombia

Luis E. Garza

Universidad de Colima

M. Barros

Pontifícia Universidade Católica do Rio Grande do Sul

Josep Blat

Pompeu Fabra University

David Thue

Carleton University

Sergio Poo Hernandez

University of Alberta

Marcia L. Spetch

University of Alberta

Greg Lee

Acadia University

Cooperative Institutions

University of Alberta

Universidad Carlos III de Madrid

Universidad Nacional de Colombia

Reykjavík University

Pontifícia Universidade Católica do Rio Grande do Sul

Universidad de Granada

University of the Basque Country

Princeton University

Michigan State University

Southern California University for Professional Studies

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Automated Planning and Player Modeling for Interactive Storytelling

IEEE Transactions on Computational Intelligence and AI in Games (2014)

Alejandro Ramírez Vadim Bulitko

Storytelling plays an important role in human life, from everyday communication to entertainment. Interactive storytelling (IS) offers its audience an opportunity to actively participate in the story being told, particularly in video games. Managing the narrative experience of the player is a complex process that involves choices, authorial goals and constraints of a given story setting (e.g., a fairy tale). Over the last several decades, a number of experience managers using artificial intelligence (AI) methods such as planning and constraint satisfaction have been developed. In this paper, we extend existing work and propose a new AI experience manager called player-specific automated storytelling (PAST), which uses automated planning to satisfy the story setting and authorial constraints in response to the player's actions. Out of the possible stories algorithmically generated by the planner in response, the one that is expected to suit the player's style best is selected. To do so, we employ automated player modeling. We evaluate PAST within a video-game domain with user studies and discuss the effects of combining planning and player modeling on the player's perception of agency.

Interactive Storytelling

Planner

10.1109/tciaig.2014.2346690

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Citations (31)

Techniques for AI-Driven Experience Management in Interactive Narratives

A K Peters/CRC Press eBooks (2015)

Vadim Bulitko Greg Lee Sergio Poo Hernandez Alejandro Ramírez David Thue

10.1201/b18373-50

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Citations (1)

The Diagonal General Case of the Laguerre-Sobolev Type Orthogonal Polynomials

Revista Colombiana de Matemáticas (2013)

Herbert Dueńas Juan Camilo García Luis E. Garza Alejandro Ramírez

We consider the family of polynomials orthogonal with respect to the Sobolev type inner product corresponding to the diagonal general case of the Laguerre-Sobolev type orthogonal polynomials. We analyze some properties of these polynomials, such as the holonomic equation that they satisfy and, as an application, an electrostatic interpretation of their zeros. We also obtain a representation of such polynomials as a hypergeometric function, and study the behavior of their zeros.

Laguerre polynomials

Hahn polynomials

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El caso general diagonal de los polinomios ortogonales de tipo Laguerre-Sobolev

Revista Colombiana de Matemáticas (2013)

Herbert Dueńas Juan Camilo García Luis E. Garza Alejandro Ramírez

Laguerre polynomials

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A Cinematographic Approach in Interactive Storytelling

Alejandro Ramírez Josep Blat

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DECOMPOSITION OF QUASI-KAHLER MANIFOLDS WHICH SATISFY THE FIRST CURVATURE CONDITION

Demonstratio Mathematica (1978)

M. Barros Alejandro Ramírez

10.1515/dema-1978-0311

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Evaluating Planning-Based Experience Managers for Agency and Fun in Text-Based Interactive Narrative

Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment (2021)

Alejandro Ramírez Vadim Bulitko Marcia L. Spetch

Artificial intelligence (AI) techniques have been applied to video games to make the overall experience more enjoyable. In games with interactive storytelling (IS), player actions can substantially affect plot events and plot characters. Therefore, AI planning techniques have been used to shape the plot inresponse to player actions that conflict with authorial goals. While such methods are poised to increase player fun andagency, two recent implementations (ASD and PAST) have not been formally evaluated to date. In this paper we do so via a series of user studies for the first time. We show that ASD significantly enhances fun and agency, whereas PAST gets mixed results with an interaction between effects of the experience manager and player prior gaming experience in one user study, and marginally significant results for increased agency in a study with a constrained story domain.

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Interactive Storytelling

Implementation

Affect

10.1609/aiide.v9i1.12684

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Towards a cinematically enhanced narrative

Alejandro Ramírez

This paper describes the automatic creation of simple cinematic scenes and events that use film language (FL) as the basis for the creation of a visual story, aiming to improve its narrative. Taking a simple screenplay as our input, we generate relevant cinematic events and conditions using a film grammar. Our system, using a Knowledge-Base (KB) approach, generates the cinematic view of the story, providing 3D animation clips that correspond to the screenplay. A prototype under development is described, together with its applications and current status.

CLIPS

Cinematography

10.1145/1178477.1178550

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Citations (2)