1 / 14

URBAN

URBAN. WP4: Efficient visualisation and streaming Tasks 4.1 + 4.2. WP4: Task 4.1. Efficient visualization and streaming Problem: huge datasets Guarantee interactive framerates Data transfer from servers Status Interactive City Viewer demo Both on desktop and Mobile ( iPhone ) systems

kirima
Télécharger la présentation

URBAN

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. URBAN WP4: Efficient visualisation and streaming Tasks 4.1 + 4.2

  2. WP4: Task 4.1 • Efficient visualization and streaming • Problem: huge datasets • Guarantee interactive framerates • Data transfer from servers • Status • Interactive City Viewer demo • Both on desktop and Mobile (iPhone) systems • Streaming data from server • Using TeleAtlas 3D city data • Horizon Culling

  3. 3D Building Data structure • Quadtree • Splitting rule: number of buildings • Leaf cells store building data • Geometry • Collision geometry • Segments for horizon culling (building tops) • Each cell can be requested separately

  4. Example data sizes • Paris • Geometry: 1.4 GB • Collision geometry: 89 MB • Texture Atlas: 5 texture atlas files (2048x2048) • 106 MB (.dds format with mipmap levels) • Segments: 40 MB • Barcelona • Geometry: 600 MB • Collision geometry: 31 MB • Texture Atlas: 4 texture atlas files (2048x2048) • 87 MB (.dds format with mipmap levels) • Segments: 14 MB

  5. Texture Atlas Example

  6. Interactive City Viewer (Desktop)

  7. Interactive City Viewer (iPod)

  8. Horizon Culling Results

  9. Paper Accepted for GDTW 2008 • “A Flexible and Extensible Architecture for Visibility Culling” • Miquel À. Rújula, JeroenDierckx, Tom Jehaes, Peter Quax, WimLamotte and Pere A. Palmer • Conference on Computer Game Design and Technology

  10. WP4: Task 4.1 planning • Further experimentation with different splitting strategies for building the quadtree • Important factors: render performance, download size per cell, segment count, … • Experiment with different strategies for building the texture atlas • One for the whole city <-> one for each cell • Build on previous experience with LoD solutions • Combinations of traditional 3D models with image-based and procedurally generated models • Leverage the existing quadtree data model for LoD • Parent nodes store a lower resolution version of the merged children • Procedurally generated data?

  11. WP4: Task 4.2 • Interaction framework • Flexible interaction specification • Status • Scripting completely integrated into the existing framework • Application interaction is defined by writing scripts • Visual world editor preliminary version

  12. Scripting Example -- Key bindings function onKeyPressed(event) if event.key == Keyboard.KC_1 then billboard1.URL = “controls.swf" elseifevent.key == Keyboard.KC_2 then billboard1.URL = "http://www.youtube.com/v/lcCAh-j_Kvg&hl=en&fs=1&rel=0&autoplay=1" elseifevent.key == Keyboard.KC_3 then billboard1.URL = "http://www.youtube.com/v/8BGbOpm9dyk&hl=en&fs=1&rel=0&autoplay=1" elseifevent.key == Keyboard.KC_3 then billboard1.URL = "http://japonyol.net/maps/swf/slider.swf" end end listener = InputManager:createKeyboardListener() listener.keyPressed = onKeyPressed -- Create the demo billboard settings = BillboardSettings() settings.sceneMgr = Application:getCamera().sceneManager settings.mesh = "../../data/Ogre/meshes/billboards/wall-billboard.mesh" settings.subMesh = 2 settings.zoomTime = 0.5 settings.width = 800 settings.height = 600 settings.startURL = “controls.swf" settings.position = OgreVector3(-48, 2, -61) billboard1 = BillboardManager:createBillboard(1, settings)

  13. Visual World Editor (WYSIWYG)

  14. WP4: Task 4.2 planning • Integration into a webbrowser • ActiveX, Firefox plugin, … • WorldEditor • Flexible interaction specification • Flow diagrams? • Services: synchronize with SMIT • Service examples • Targeted advertising • Based on user profile, previous interests, … • Accounting • Number of viewers, number of clicks, …

More Related