![Parameterization & Packaging6Trapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlases1+23+4screen spacetexture spacesorted bounding boxesre-compute atlas layout per-frameon CPUproject3D boundary representationsclipprojected coordinates and sort rectangles perform rectangular packing on CPU [Igarashi, 2001] compute transformation for screen-space vertex displacement](https://image.slidesharecdn.com/view-101007154416-phpapp02/85/View-Dependent-Texture-Atlases-EG-2010-8-320.jpg)
![Screen Space Vertex Displacementconcept introduced by Camera Textures [Spindler et al. 2006]applied per-primitive using geometry shadersfetch transformation using object IDfrom: original screen space positionto: texture atlas positionTrapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlases7](https://image.slidesharecdn.com/view-101007154416-phpapp02/85/View-Dependent-Texture-Atlases-EG-2010-9-320.jpg)
View-Dependent Texture Atlases (EG 2010)
- 1. Interactive Rendering To View-Dependent Texture-AtlasesMatthias Trapp & Jürgen DöllnerHasso-Plattner-Institut, University of Potsdam, Germany
- 2. Introduction & Problem Statementimage-based representation of 3d shapes:Saito & Takahashi, 1990derived using render-to-texture (RTT)(scene = texture) vs. (object = texture)numerous applications:post-processing effects,image-based occlusion management,client-server applicationsproblems for (object = texture) :multiple objects results in multiple texturesunderutilized texturesfor objects not covering complete viewport2Trapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlases
- 3. View-Dependent Texture-Atlas3Trapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlasesmain idea:re-compute texture-atlas parameterization & packing per framebased on the projected 3Dshape approximationscontributions:
- 4. reduced memory footprint and texture management
- 5. applicable in a single rendering pass for static meshes
- 6. suitable for real-time renderingHow Does it Work? – In a Nutshell…4Trapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlases
- 7. Conceptual Overview5Trapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlases
- 8. Parameterization & Packaging6Trapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlases1+23+4screen spacetexture spacesorted bounding boxesre-compute atlas layout per-frameon CPUproject3D boundary representationsclipprojected coordinates and sort rectangles perform rectangular packing on CPU [Igarashi, 2001] compute transformation for screen-space vertex displacement
- 9. Screen Space Vertex Displacementconcept introduced by Camera Textures [Spindler et al. 2006]applied per-primitive using geometry shadersfetch transformation using object IDfrom: original screen space positionto: texture atlas positionTrapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlases7
- 10. Render-To-Texture Atlas 8Trapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlases
- 11. Results & Discussionsmall number of objects: RTT is faster, but low TA utilizationlower setup cost for high number of objectsTA resolution should be multiples of screen resolutionsimplementation is not transform-bound9Trapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlases
- 12. Wrap-Up & Conclusionsconcept of view-dependent texture atlasesoptimization for render-to-texture applicationssingle-pass creation using:layered renderingscreen-space vertex displacementtrade-offs:#of objects vs. frames-per-secondsTA utilization vs. bounding approximationfuture work:evaluate different shape approximationGPU based TA packaging strategies10Trapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlases
- 13. Thank you for your attention…contact:Matthias Trappmatthias.trapp@hpi.uni-potsdam.deJürgenDöllnerjuergen.doellner@hpi.uni-potsdam.deComputer Graphics Systems GroupProf. Dr. JürgenDöllnerwww.hpi.uni-potsdam.de/3dResearchgroup 3D-Geoinformationwww.3dgi.de11Trapp & Döllner :: Interactive Rendering to View-Dependent Texture Atlases