1 / 25

Virtual Storytelling

Virtual Storytelling. Adam Abonyi Daniel Balaš. Agenda. Introduction to virtual storytelling Petri Nets Our improvements in Petri Nets Example. Storytelling. Storyteller tells a tale or a story At a campfire, by the bed…

evangeline-shepard
Download Presentation

Virtual Storytelling

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Virtual Storytelling Adam AbonyiDaniel Balaš

  2. Agenda • Introduction to virtual storytelling • Petri Nets • Our improvements in Petri Nets • Example

  3. Storytelling • Storyteller tells a tale or a story • At a campfire, by the bed… • The storyline is adapted to the storytellers needs and to the reactions of the listeners

  4. Virtual Storytelling • Application = storyteller • The plot is designed in advance • The storyline is influenced by the actions of the viewer

  5. Our Solution Petri Nets: • Graphical and Modeling tool • Petri nets are useful tool for describing and studying systems that are characterized as being concurrent, asynchronous, nondeterministic, and/or stochastic

  6. Our Goals • Allow designers to easily and intuitively create virtual stories • Coherency of the story in the virtual world • Good artificial intelligence of the actors • Application, that will allow the user interaction with the story

  7. Petri Nets

  8. Petri Nets • Petri net is a graphical and mathematical modeling tool • Consists of only 3 main elements: places transitions arcs

  9. Name Petri Nets Simple Petri Net example: Main Elements: P1 Place Name Transition T1 P2 Arc Token

  10. Petri nets Rules: • Connections have a direction • Connection lead only from a place to transition or from a transition to a place • Places may contain zero or more tokens p2 p1 t1 p2 p3 p1

  11. Transitions p2 p1 Enabled: • All input places contain a token t1 p2 p1 t1 Firing: • Only enabled transitions can fire • Consumes a token from each input place and adds a token to each output place

  12. Petri Net Example: Traffic Lights Signal yellow Go Stop Signal green Warning Signal Red

  13. Petri Nets extension

  14. Name Storytelling PN Main Elements: C1 C2 Container Name Trigger T1 Name Token C3 Petri net Event World Event

  15. Tokens Name • Name – defines the token • Age – token age(changes according to the flow of time in the virtual world) • Object (optional) – specifies if the token is attached to a virtual world object Name x Age x [Object]

  16. Containers Name • Name • Group of Tokens Name x {Token}

  17. Triggers • Name of the trigger • Preconditions that enable the trigger- which containers must contain tokens- what are the required properties of tokens • Consequences that the trigger will have- which tokens will be placed in which containers Name

  18. Storytelling PN We call: • Containers as places in standard PN • Triggers as transitions in standard PN • Arcs are part of triggers • Token is one of the main element

  19. Story • Containers are the entry point into the Petri nets Button pushed • Triggers can change the behavior of the actors in the virtual world Push btn • Tokens represent a object state or certain world object

  20. Example of a simple scene Petri Net Virtual World starring: Adam wants to steal a present Adam & Eve Steal Present Policeman nearby At Shop Mr. Policeman Caught Stolen Shop full of presents Caught Present Run away Give To Eve

  21. Example of a simple scene Petri Net Virtual World Adam wants to steal a present Steal Present Policeman nearby At Shop Caught Stolen Caught Present Run away Give To Eve

  22. Example of a simple scene #2 Petri Net Virtual World Adam wants to steal a present Steal Present Policeman nearby At Shop Caught Stolen Caught Present Run away Give To Eve

  23. Usage Drama manager: • Contains the Petri nets and also has an eye into the virtual world • Realizes the story in the virtual world • Controls the Petri nets depending on the state of the virtual world • Changes the behavior of the virtual agents

  24. Usage - Advantages • The story that takes place in the world stays in the desired tracks, even thou some parts may be completed in many different ways. • Plot is designed in key points. ** domyslet • Reacts directly to the things that are happening in the world and allows the plot to continue.

  25. Questions and Answers Thanks for listening more information at: http://ksvi.mff.cuni.cz/~brom/papers/IVE-dramamanager-2006.pdf

More Related