The Power of WebGL - Hackeando sua GPU com JavaScript
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The document discusses the capabilities of WebGL, including how it utilizes GPU for graphics processing, the role of shaders, and the basics of creating 3D graphics within web applications. It touches on optimization techniques for CPU and GPU, performance considerations, and introduces WebVR for virtual reality experiences on the web. The document also includes various references and resources for further exploration of WebGL and related technologies.
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- 1. The Power of WebGL @raphamundi HACKING YOUR GPU WITH JAVASCRIPT
- 4. Shaders
- 5. Graphic procedures e.g: surfacing and texturing, lighting and shadowing, texture and geometry generation.
- 6. The "3D" Effect * A thanks Jaume Sanchez for the awesome resource!
- 7. [ -1, -1, 0 ], [ 1, -1, 0 ], [ 1, 1, 0 ], [ -1, 1, 0 ]
- 8. Vertex shader takes this data, and some other values (model-view and projection matrix, and others) and turns the 4 points into 4 projected points
- 9. We need to specify how to draw it: points, wireframe or solid
- 10. The solid projected square gets "discretised" base on the output display
- 11. The system fills the space connecting these dots and calculates what pixels on your display need to be drawn
- 12. The rest is up to the fragment shader It gets called for each of these small squares, and the correct output color is calculated.
- 14. GPU Run! Run! As fast as you can!
- 17. <canvas/>WebGL Context Define the Geometry and Store it in the Buffer Objects Create and Compile the Shaders ( Vertex && Fragment )
- 18. Atributes
- 24. WebGL is very hot Damn God! “ ”
- 26. ~= 80ºC!!!
- 27. ~= 80ºC!!!WebGL makes your macbook hot. Yeah, literally.
- 30. Where are the graphics costs?
- 31. The first rule of any optimization is to find where the performance problem is.
- 32. Strategies for optimizing for GPU vs. CPU are quite different.
- 33. CPU optimization
- 35. GPU: Texture Compression and Mipmaps
- 36. DrawCalls
- 37. WebVR Bringing Virtual Reality to the Web
- 39. Okay, we already tried a lot.
- 40. till now:
- 41. WebVR is an API http://mzl.la/1IK6pnf
- 42. WebVR • Sechelt (http://mozvr.com/projects/sechelt/) • Quake III (http://media.tojicode.com/q3bsp/) • vizor.io (http://vizor.io/fthr/vr_cube/edit) • Primoseeditor (https://www.primroseeditor.com/#fullscreen) • Inspirit (http://inspirit.unboring.net/)
- 43. MozVRmozvr.com
- 44. bit.ly/1lDsdLR
- 45. Thanks! :)
- 46. References: • Shaders! What are they and what can they do for me? - Jaume Sanchez (https://www.clicktorelease.com/talks/ scotlandjs-2015/) • Dive into 0.016 seconds of WebGL - @yomotsu (https:// speakerdeck.com/yomotsu/dive-into-0-dot-016-seconds-of-webgl) • Getting started with three.js and WebGL - Jaume Sanchez (https://www.clicktorelease.com/talks/ jsconfbp-2015/)
- 47. References: • The Road To WebVR • Replacing reality with JavaScript - Jaume Sanchez (https://www.clicktorelease.com/talks/ fullstackfest-2015/slides/#0) • WebGL tutorial MDN (https://developer.mozilla.org/en-US/docs/ Web/API/WebGL_API/Tutorial) • The Rise and Fall and Rise of Virtual Reality (http:// www.theverge.com/a/virtual-reality/oral_history)
- 48. References: • 6 Virtual Reality Devices From the Past (http:// www.cheatsheet.com/technology/a-trip-down-virtual-reality-road-6- systems-of-the-past.html )