Three.js basics
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This document provides an overview of the Three.js library for creating 3D graphics in web browsers using WebGL. It discusses key Three.js concepts like scenes, cameras, lights, materials, and textures. It also provides examples of how to load 3D models and textures, set up animations, and add interactivity using controls. Useful links are included for learning more about Three.js and WebGL fundamentals.
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Three.js basics
- 1. Vasilika Klimova Frontend Team Lead Three.js basics
- 2. 2 vasilika.ru Vasilika Klimova vasilika.klimova Lik04ka • travelling • computer games • to help people
- 4. 4 Schools
- 7. 7 Contents WebGL application Advantages Three.js library Basics of 3D graphics 3D viewer
- 8. 8
- 11. 11 Mapbox GL JS mapbox link
- 13. 13 Unity 3D
- 14. 14 3D tour link 3D tour
- 17. 17 • HTML5 <canvas> • OpenGL ES 2.0 • GLSL ES 1.10 • 2D/3D WebGL
- 18. 18 Components of WebGL <canvas/> OpenGL Shading Language
- 20. 20 get.webgl.org
- 22. 22
- 28. 3D basics 28
- 29. 3D basics • Point • Polygon • Object (mesh) • Geometry • Material • Texture 3D basics 29 Vertex Vertex Vertex Polygon Point
- 30. Object 30
- 31. 3D термины • Scene • Light • Camera • Renderer 3D terms 31
- 32. Set up a scene 32
- 33. @mrdoob 33 Three.js • three.min.js • OBJLoader.js • TrackballControls.js
- 34. 3434
- 36. object.obj Vertex list with coords (x,y,z) Texture coordinates (u,v) Faces (v/vt) Data-in 36
- 37. Load Texture Renderer, canvas Load 3D object Scene, Camera, Light Animation 37 Algorithm
- 38. Player.container = document.getElementById("webgl-player"); Player.size = { width: Player.container.offsetWidth, height: Player.container.offsetHeight }; Player.scene = new THREE.Scene(); 38 Scene
- 39. Load Texture Renderer, canvas Load 3D object Scene, Camera, Light Animation Algorithm 39
- 41. Player.camera.position.z = 300; Player.scene.add(Player.camera); // PerspectiveCamera( fov, aspect, near, far ) aspect = Player.size.width / Player.size.height; Player.camera = new THREE.PerspectiveCamera(45.0, aspect, 2, 8000); 41 Camera
- 42. Load Texture Renderer, canvas Load 3D object Scene, Camera, Light Animation 42 Algorithm
- 43. Player.light = new THREE.AmbientLight(); Player.scene.add(Player.light); 43 Light
- 45. Load Texture Renderer, canvas Load 3D object Scene, Camera, Light Animation 45 Algorithm
- 46. // canvas Player.container.appendChild(Player.renderer.domElement); Player.renderer = new THREE.WebGLRenderer({alpha: true}); Player.renderer.setSize(Player.size.width, Player.size.height); Renderer 46
- 48. Load Texture Renderer, canvas Load 3D object Scene, Camera, Light Animation 48 Algorithm
- 49. Player.textureLoader = new THREE.TextureLoader(); Player.textureLoader.load("texture.jpg", function(texture) { Player.texture = texture; Player.loadModel(); }); 49 Load texture
- 50. Load Texture Renderer, canvas Load 3D object Scene, Camera, Light Animation 50 Algorithm
- 51. objectLoader.load("object.obj", function(object) { object.traverse(function(child) { if (child instanceof THREE.Mesh) { child.material.map = Player.texture; } }); Player.scene.add(object); }); } loadModel: function() { objectLoader = new THREE.OBJLoader(); 51 Load model
- 52. 52 Load Texture Renderer, canvas Load 3D object Scene, Camera, Light Animation Algorithm
- 53. 53 Request a browser to repeat animate() Draw model Update camera position requestAnimationFrame animate: function() { requestAnimationFrame(Player.animate); Player.controls.update(); Player.renderer.render(Player.scene, Player.camera); } Animation loop
- 54. 54 Player.controls = new THREE.TrackballControls(Player.camera, Player.container); animate: function() { requestAnimationFrame(Player.animate); Player.renderer.render(Player.scene, Player.camera); } Player.animate(); Player.controls.update(); Controls
- 56. 5656 3D viewer 3D viewer link
- 57. Wireframe 57
- 58. 58 geometry = new THREE.SphereGeometry(100, 50, 50); material = new THREE.MeshPhongMaterial({map: texture}); Player.mesh = new THREE.Mesh(geometry, material); Player.scene.add(Player.mesh); Sphere
- 63. 63 Advantages • High GPU Performance • No compilation • Cross-platform • Automatic memory management • Open standard
- 64. 64 Disavantages • Raster graphics • Optimization required • Poly-polygonal scenes
- 65. 65 Where can I use it? • Raster graphics rendering • Image editing and analysis • Filtering video • Interactive graphics • Games • Statistics in the form of graphs
- 66. Interactivity
- 67. 67 Gamification
- 68. 68 Useful links WebGL Fundamentals WebGL Academy Learning Three.js: The JavaScript 3D Library for WebGL Mozilla Three.js Books learningwebgl.com davidscottlyons.com/threejs
- 69. Thanks for listening! vasilika.ru Vasilika Klimova vasilika.klimova Lik04ka