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VR Workshop #1
- 1. PRESENTER Enrico BARACAGLIA WORKSHOP #1 Visualisation of scientific data in VR 29 AUGUST 2018 ORGANIZED BY ESO, Chile SUPERVISOR Frédéric VOGT
- 2. Overview 1. What is VR? 2. Why visualising data in VR? 3. Available tools, software and hardware 4. Guided practical session 2
- 3. What is VR? 329/08/18 | enricobaracaglia@gmail.com Virtual Reality (VR) is the use of computer technology to create a simulated environment through stereo vision. VR places the user inside an experience: instead of viewing a screen in front of them, users are immersed and able to interact with 3D worlds.
- 4. Why visualising data in VR? 429/08/18 | enricobaracaglia@gmail.com Because it allows to see things differently, with a different perspective and changing your perspective changes what you see. When we see things differently we can get insights in a completely new way
- 5. Why visualising data in VR? 529/08/18 | enricobaracaglia@gmail.com It opens new frontiers: it’s like making any visualization twice better by giving the extra dimension of information. You do not have to rotate a model to get an idea about its volume. You can literally feel shapes and proportions. And in some experiences even interact with data. From: https://www.virtualitics.com/
- 6. Available tools, software and hardware 629/08/18 | enricobaracaglia@gmail.com Software to create and/or visualise VR content
- 7. Available tools, software and hardware 729/08/18 | enricobaracaglia@gmail.com Hardware to visualise VR content
- 8. Guided practical session 829/08/18 | enricobaracaglia@gmail.com Our model Created with Python and Mayavi module
- 9. Guided practical session 929/08/18 | enricobaracaglia@gmail.com Sketchfab supports more than 50 3D formats [1]: 3DC point cloud (.3dc, .asc) 3DS (.3ds) Alias Wavefront (.obj) Blender (.blend) Drawing eXchange Format (.dxf) Autodesk Filmbox, FBX (.fbx) Generic Tagged Arrays (.gta) Google Earth, Keyhole Markup Language (.kmz) LIDAR point clouds (.las) Open Inventor (.iv) OpenSceneGraph (.osg, .osgt, .osgb, .osgtgz, .osgx, .ive) Polygon File Format (.ply) Valve source engine (.vpk) Virtual Reality Modeling Language, VRML (.wrl, .wrz) [1] https://help.sketchfab.com/hc/en- us/articles/202508396-3D-File- Formats?utm_source=website&utm_ campaign=upload_hints
- 11. Guided practical session 1129/08/18 | enricobaracaglia@gmail.com How to upload a 3D model in A-Frame [2] [3]: [2] https://aframe.io/docs/0.8.0/introduc tion/models.html <html> <head> <script src="https://aframe.io/releases/0.8.0/aframe.min.js"></script> </head> <body> <a-scene> <a-assets> <a-asset-item id="object" src="./mayavi_demo_fixed.obj"> </a-asset-item> <a-asset-item id="material" src="./mayavi_demo_fixed.mtl"> </a-asset-item> </a-assets> <a-entity obj-model="obj: #object; mtl: #material" position="0 1 0" rotation="0 0 0“ scale="0.3 0.3 0.3"> </a-entity> </a-scene> </body> </html> Mozilla Firefox [3] https://aframe.io/docs/0.8.0/compon ents/obj-model.html https://aframe.io/a-painter/
- 12. Guided practical session 1229/08/18 | enricobaracaglia@gmail.com [4] https://www.blend4web.com/doc/e n/vr_and_ar.html VR and AR with Blend4Web [4]: Visualise point cloud (.txt file / .ply file) in VR using Meshlab and Blend4Web.
- 13. Guided practical session 1329/08/18 | enricobaracaglia@gmail.com [4] https://www.blend4web.com/doc/e n/vr_and_ar.html Steps: 1) MeshLab → Filters > Point Set > Compute normals for point sets 2) → Export Mesh as .ply 3) Blender → File > Import > Stanford (.ply) 4) → Set Origin > Geometry to Origin 5) → Add Particle System, Set parameters 6) → Note: you can simplify the object that you want to duplicate (Add Modifier, Decimate) 7) → Add Modifier > Convert > Parent 8) → Export as .obj (it will automatically export mesh and material) 9) → Export as .html with B4W
- 14. Guided practical session 1429/08/18 | enricobaracaglia@gmail.com Unity supports importing Meshes and animation from two different types of files [5]: ▪ Exported 3D file formats, such as .fbx or .obj. You can export files from 3D modeling software in generic formats that can be imported and edited by a wide variety of different software. ▪ Proprietary 3D or DCC (Digital Content Creation) application files, such as .max and .blend file formats from 3D Studio Max or Blender, for example. You can only edit proprietary files in the software that created them. Proprietary files are generally not directly editable by other software without first being converted and imported. ▪ Unity can import and use both types of files, and each come with their own advantages and disadvantages.[5] https://docs.unity3d.com/Manual/3D -formats.html
- 15. Guided practical session 15 Create a new project and set up a basic environment for VR Steps: 1) Unity → Edit > Project Settings > Player 2) → Virtual Reality Supported > Enable Virtual Reality Support through XR Settings VR Overview and Settings https://docs.unity3d.com/Manual/VR Overview.html
- 16. Guided practical session 1629/08/18 | enricobaracaglia@gmail.com Import our model (.obj + .mtl) into Unity Import simple animation into Unity [6] Import SteamVR from the Asset Store [7] Import Blender animation into Unity [6] https://www.youtube.com/watch?v= 3CSUxATQVLw [7] https://assetstore.unity.com/packag es/templates/systems/steamvr- plugin-32647
- 17. Summary 17 In this workshop you learned :In this workshop you learned ✓ What can be done with VR ✓ How to use different tools to visualize models and animations in VR 29/08/18 | enricobaracaglia@gmail.com
- 18. “ Thanks for listening. Any questions? 1823/07/18 | enricobaracaglia@gmail.com https://www.linkedin.com/in/enrico-baracaglia-978789100/