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1 WebGL X F Kageyama (Kobe Univ.) Visualization / 57

2 WebGL OpenGL GLSL Kageyama (Kobe Univ.) Visualization / 57

3 WebGL Kageyama (Kobe Univ.) Visualization / 57

4 WebGL Kageyama (Kobe Univ.) Visualization / 57

5 WebGL id if I id else kageyama.lecture Kageyama (Kobe Univ.) Visualization / 57

6 WebGL OpenGL glbegin/glend, glvertex, glnormal CG Computer Graphics OpenGL Kageyama (Kobe Univ.) Visualization / 57

7 WebGL WebGL Kageyama (Kobe Univ.) Visualization / 57

8 WebGL Kageyama (Kobe Univ.) Visualization / 57

9 WebGL 5 20 x 5 = 100 kageyama.lecture Kageyama (Kobe Univ.) Visualization / 57

10 WebGL WebGL WebGL - OpenGL ES 2.0 for the Web Kageyama (Kobe Univ.) Visualization / 57

11 WebGL WebGL Firefox 4 Google Chrome 8 Safari 5 Opera 12 Internet Explorer 11 Kageyama (Kobe Univ.) Visualization / 57

12 WebGL Professional WebGL Programming, A. Anyuru WebGL, Data Visualization Principles and Practice, C. Telea three.js HTML5 3D,, Kageyama (Kobe Univ.) Visualization / 57

13 WebGL Part 1 OpenGL WebGL CG GPU Part 2 WebGL Part 3 Kageyama (Kobe Univ.) Visualization / 57

14 講義の目標 WebGL とは 登攀ルート GPUを使いこなしたSci. Viz. 基本的可視化 アルゴリズム シェーダ言語 線形代数 コンピュータグラフィクス Kageyama (Kobe Univ.) Visualization / 57

15 OpenGL OpenGL Kageyama (Kobe Univ.) Visualization / 57

16 OpenGL OpenGL OpenGL 2.X OpenGL 1.X OpenGL 3.0 OpenGL 3.0 OpenGL 3.1 OpenGL 3.2 Kageyama (Kobe Univ.) Visualization / 57

17 OpenGL OpenGL Overview OpenGL was first created as an open and reproducable alternative to Iris GL...Silicon Graphics workstations... OpenGL non-SGI 3rd party OpenGL OpenGL Shading Language (also called GLSL), a C like language with which the transformation and fragment shading stages of the pipeline can be programmed. OpenGL 3.0 adds the concept of deprecation... GL 3.1 removed most deprecated features, and GL 3.2 created the notion of core and compatibility OpenGL contexts. Official versions of OpenGL released to date are 1.0, 1.1, 1.2, 1.2.1, 1.3, 1.4, 1.5, 2.0, 2.1, 3.0, 3.1, 3.2, 3.3, 4.0, 4.1, 4.2, 4.3. Kageyama (Kobe Univ.) Visualization / 57

18 OpenGL OpenGL OpenGL 4.3 OpenGL SL 4.3 OpenGL ES 3.0 ios, Android, Symbian WebGL 2.0 Kageyama (Kobe Univ.) Visualization / 57

19 OpenGL Shader-based OpenGL OpenGL OpenGL API OpenGL 3.0 OpenGL Shader-base Kageyama (Kobe Univ.) Visualization / 57

20 OpenGL OpenGL ver. 3.1 Kageyama (Kobe Univ.) Visualization / 57

21 OpenGL OpenGL ver. 3.1 // // H e l l o W o r l d. c // // To c o m p i l e on Mac. // gcc t h i s s o u r c e. c framework GLUT framework OpenGL // #i n c l u d e <GLUT/ g l u t. h> void d i s p l a y ( void ) { g l C l e a r ( GL COLOR BUFFER BIT ) ; g l B e g i n (GL POLYGON) ; g l V e r t e x 2 f ( 0.5, 0.5) ; g l V e r t e x 2 f ( 0.5, 0. 5 ) ; Kageyama (Kobe Univ.) Visualization / 57

22 OpenGL } g l V e r t e x 2 f ( 0. 5, 0. 5 ) ; g l V e r t e x 2 f ( 0. 5, 0.5) ; glend ( ) ; g l u t S w a p B u f f e r s ( ) ; i n t main ( i n t argc, char a r g v ) { g l u t I n i t (& argc, a r g v ) ; g l u t I n i t D i s p l a y M o d e (GLUT RGBA GLUT DOUBLE) ; glutcreatewindow ( H e l l o World ) ; g l u t D i s p l a y F u n c ( d i s p l a y ) ; glutmainloop ( ) ; } Listing 1: OpenGL Kageyama (Kobe Univ.) Visualization / 57

23 OpenGL WebGL link: webgl sample triangle 00.html Kageyama (Kobe Univ.) Visualization / 57

24 GLSL OpenGL OpenGL SL, GLSL 4.0 GPU CG = OpenGL + GLSL( + GLSL( Kageyama (Kobe Univ.) Visualization / 57

25 GLSL OpenGL GPU GPGPU Kageyama (Kobe Univ.) Visualization / 57

26 GLSL GPU GeForce GTX TITAN CUDA Cores 2688 Kageyama (Kobe Univ.) Visualization / 57

27 GLSL immediate-mode API GPU retained-mode API GPU WebGL API Kageyama (Kobe Univ.) Visualization / 57

28 GLSL OpenGL OpenGL 3.0 deprecation OpenGL 3.2 API glbegin/glend GL MODELVIEW, GL PROJECTION Kageyama (Kobe Univ.) Visualization / 57

29 GLSL OpenGL ES 2.0 OpenGL for Embedded Systems Immediate API glbegin/glend C/C++, Objective-C, Java OpenGL ES 2.0 WebGL WebGL JavaScript Kageyama (Kobe Univ.) Visualization / 57

30 GLSL HTML5 canvas HTML5 5 HTML canvas: JavaScript HTML5 canvas Kageyama (Kobe Univ.) Visualization / 57

31 CG Kageyama (Kobe Univ.) Visualization / 57

32 CG MPI Embarrassingly parallel problems Kageyama (Kobe Univ.) Visualization / 57

33 CG embarrassingly parallel etc. CG GPU (Graphics Processing Unit) Kageyama (Kobe Univ.) Visualization / 57

34 Kepler GeForce Nvidia white paper Kageyama (Kobe Univ.) Visualization / 57

35 Kepler GeForce Nvidia white paper Kageyama (Kobe Univ.) Visualization / 57

36 Graphics rendering pipeline グラフィックスレンダリング パイプライン input: 3 output: 2 Kageyama (Kobe Univ.) Visualization / 57

37 アプリケ ーション ジオメト リ ラスタラ イザ Kageyama (Kobe Univ.) Visualization / 57

38 Kageyama (Kobe Univ.) Visualization / 57

39 座標変換 ライティ ング 射影 クリッピ ング スクリー ンマッピ ング Kageyama (Kobe Univ.) Visualization / 57

40 canonical view volume 2 ( 1, 1, 1) (x, y, z) (1, 1, 1) Normalized Device Coordinates, NDC CG Kageyama (Kobe Univ.) Visualization / 57

41 2 orthographic projection, parallel projection perspective projection, view frustum 4 4 Kageyama (Kobe Univ.) Visualization / 57

42 Kageyama (Kobe Univ.) Visualization / 57

43 Kageyama (Kobe Univ.) Visualization / 57

44 width height x y z 1 z 1 Kageyama (Kobe Univ.) Visualization / 57

45 アプリケ ーション ジオメト リ ラスタラ イザ Kageyama (Kobe Univ.) Visualization / 57

46 3D 2D 2D Kageyama (Kobe Univ.) Visualization / 57

47 p. 51 Kageyama (Kobe Univ.) Visualization / 57

48 Kageyama (Kobe Univ.) Visualization / 57

49 Z Kageyama (Kobe Univ.) Visualization / 57

50 RGBA 16 bits, 23 bits, 32 bits RGBA32 = R8 + G8 + B8 + A8 Kageyama (Kobe Univ.) Visualization / 57

51 Z Z-buffer Edwin Catmull 1974 RenderMan Kageyama (Kobe Univ.) Visualization / 57

52 Z-buffer z z b z a z a < z b x Kageyama (Kobe Univ.) Visualization / 57

53 Z-buffer z x Kageyama (Kobe Univ.) Visualization / 57

54 Z-buffer z x Kageyama (Kobe Univ.) Visualization / 57

55 Z-buffer z b 3 z a = z 1 + (z 2 z 1 ) x s x 1 x 2 x 1 z b = z 2 + (z 3 z 2 ) x s x 2 x 3 x 2 z p = z a + (z b z a ) y p y b y b x a 2 a p 1 x x s Kageyama (Kobe Univ.) Visualization / 57

56 (Williams1978) z 2 Kageyama (Kobe Univ.) Visualization / 57

57 Kageyama (Kobe Univ.) Visualization / 57

WebGL Safari WebGL WebGL Safari Kageyama (Kobe Univ.) / 5

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