remove un-needed categories

threejs/lessons/ru/threejs-cameras.md

@@ -1,6 +1,5 @@
 Title: Three.js - Камера
 Description: Как использовать камеру в Three.js
-Category: fundamentals
 TOC: Камера
 
 Эта статья является частью серии статей о three.js. 

threejs/lessons/ru/threejs-fundamentals.md

@@ -1,6 +1,5 @@
 Title: Основы Three.js
 Description: Твой первый урок по Three.js начинаетсся с основ
-Category: basics
 TOC: Базовые принципы
 
 Это первая статья в серии статей о three.js.

threejs/lessons/ru/threejs-lights.md

@@ -1,6 +1,5 @@
 Title: Three.js - Освещение
 Description: Настройка освещения
-Category: fundamentals
 TOC: Освещение
 
 Эта статья является частью серии статей о three.js. 

threejs/lessons/ru/threejs-material-table.md

@@ -1,6 +1,5 @@
 Title: Таблица характеристик материалов
 Description: Таблица, показывающая, какие функции поддерживают каждый из материалов
-Category: reference
 TOC: Таблица материалов
 
 Наиболее распространенными материалами в three.js являются материалы 

threejs/lessons/ru/threejs-materials.md

@@ -1,6 +1,5 @@
 Title: Материалы Three.js
 Description: Материалы в Three.js
-Category: fundamentals
 TOC: Материалы
 
 Эта статья является частью серии статей о three.js. 

threejs/lessons/ru/threejs-multiple-scenes.md

@@ -1,6 +1,5 @@
 Title: Three.js - Несколько холстов и Несколько сцен
 Description: Kак рисовать на всей web-странице с THREE.js
-Category: solutions
 TOC: Несколько холстов, несколько сцен
 
 Допустим, вы хотите создать сайт электронной коммерции или сделать 

threejs/lessons/ru/threejs-primitives.md

@@ -1,6 +1,5 @@
 Title: Примитивы Three.js
 Description: Обзор примитивов three.js.
-Category: fundamentals
 TOC: Примитивы
 
 Эта статья является частью серии статей о three.js. 

threejs/lessons/ru/threejs-responsive.md

@@ -1,6 +1,5 @@
 Title: Three.js Oтзывчивый Дизайн
 Description: Как приспособить three.js под дисплеи разного размера.
-Category: basics
 TOC: Адаптивный дизайн
 
 Это вторая статья в серии статей о three.js.

threejs/lessons/ru/threejs-scenegraph.md

@@ -1,6 +1,5 @@
 Title: Граф сцены Three.js
 Description: Что такое граф сцены?
-Category: fundamentals
 TOC: Граф сцены
 
 Эта статья является частью серии статей о three.js. 

threejs/lessons/ru/threejs-setup.md

@@ -1,6 +1,5 @@
 Title: Настройка окружения Three.js
 Description: Как настроить разрабочее окружение для Three.js
-Category: basics
 TOC: Настройка
 
 Эта статья является частью серии статей о three.js. 

threejs/lessons/ru/threejs-textures.md

@@ -1,6 +1,5 @@
 Title: Three.js Текстуры
 Description: Использование текстур в three.js
-Category: fundamentals
 TOC: Текстуры
 
 Эта статья является частью серии статей о three.js. 

threejs/lessons/threejs-align-html-elements-to-3d.md

@@ -1,6 +1,5 @@
 Title: Three.js Aligning HTML Elements to 3D
 Description: How to line up an HTML Element to match a point in 3D space
-Category: solutions
 TOC: Aligning HTML Elements to 3D
 
 This article is part of a series of articles about three.js. The first article

threejs/lessons/threejs-backgrounds.md

@@ -1,6 +1,5 @@
 Title: Three.js Backgrounds and Skyboxes
 Description: How to add a background in THREE.js
-Category: solutions
 TOC: Add a Background or Skybox
 
 Most of the articles here use a solid color for a background.

threejs/lessons/threejs-billboards.md

@@ -1,6 +1,5 @@
 Title: Three.js Billboards
 Description: How to make things always face the camera.
-Category: solutions
 TOC: Billboards and Facades
 
 In [a previous article](threejs-canvas-textures.html) we used a `CanvasTexture`

threejs/lessons/threejs-cameras.md

@@ -1,6 +1,5 @@
 Title: Three.js Cameras
 Description: How to use Cameras in Three.js
-Category: fundamentals
 TOC: Cameras
 
 This article is one in a series of articles about three.js.

threejs/lessons/threejs-canvas-textures.md

@@ -1,6 +1,5 @@
 Title: Three.js Canvas Textures
 Description: How to use a canvas as a texture in Three.js
-Category: solutions
 TOC: Using A Canvas for Dynamic Textures
 
 This article continues from [the article on textures](threejs-textures.html).

threejs/lessons/threejs-cleanup.md

@@ -1,6 +1,5 @@
 Title: Three.js Cleanup
 Description: How to use free memory used by Three.js
-Category: solutions
 TOC: Freeing Resources
 
 Three.js apps often use lots of memory. A 3D model

threejs/lessons/threejs-custom-buffergeometry.md

@@ -1,6 +1,5 @@
 Title: Three.js Custom BufferGeometry
 Description: How to make your own BufferGeometry.
-Category: fundamentals
 TOC: Custom BufferGeometry
 
 A [previous article](threejs-custom-geometry.html) covered

threejs/lessons/threejs-custom-geometry.md

@@ -1,6 +1,5 @@
 Title: Three.js Custom Geometry
 Description: How to make your own geometry.
-Category: fundamentals
 TOC: Custom Geometry
 
 A [previous article](threejs-primitives.html) gave a tour of

threejs/lessons/threejs-debugging-glsl.md

@@ -1,6 +1,5 @@
 Title: Debugging Three.js - GLSL
 Description: How to debug GLSL Shaders
-Category: tips
 TOC: Debugging GLSL
 
 This site so far does not teach GLSL just like it does not teach JavaScript.

threejs/lessons/threejs-debugging-javascript.md

@@ -1,6 +1,5 @@
 Title: Three.js Debugging JavaScript
 Description: How to debug JavaScript with THREE.js
-Category: tips
 TOC: Debugging JavaScript
 
 Most of this article is not directly about THREE.js but is

threejs/lessons/threejs-fog.md

@@ -1,6 +1,5 @@
 Title: Three.js Fog
 Description: Fog in Three.js
-Category: fundamentals
 TOC: Fog
 
 This article is part of a series of articles about three.js. The

threejs/lessons/threejs-fundamentals.md

@@ -1,6 +1,5 @@
 Title: Three.js Fundamentals
 Description: Your first Three.js lesson starting with the fundamentals
-Category: basics
 TOC: Fundamentals
 
 This is the first article in a series of articles about three.js.

threejs/lessons/threejs-indexed-textures.md

@@ -1,6 +1,5 @@
 Title: Three.js Indexed Textures for Picking and Color
 Description: Using Indexed Textures for Picking and Color
-Category: solutions
 TOC: Using Indexed Textures for Picking and Color
 
 This article is a continuation of [an article about aligning html elements to 3d](threejs-align-html-elements-to-3d.html).

threejs/lessons/threejs-lights.md

@@ -1,6 +1,5 @@
 Title: Three.js Lights
 Description: Setting up Lights
-Category: fundamentals
 TOC: Lights
 
 This article is part of a series of articles about three.js. The

threejs/lessons/threejs-load-gltf.md

@@ -1,6 +1,5 @@
 Title: Three.js Loading a .GLTF File
 Description: Loading a .GLTF File
-Category: solutions
 TOC: Load a .GLTF file
 
 In a previous lesson we [loaded an .OBJ file](threejs-load-obj.html). If

threejs/lessons/threejs-load-obj.md

@@ -1,6 +1,5 @@
 Title: Three.js Loading a .OBJ File
 Description: Loading a .OBJ File
-Category: solutions
 TOC: Load an .OBJ file
 
 One of the most common things people want to do with three.js

threejs/lessons/threejs-material-table.md

@@ -1,6 +1,5 @@
 Title: Material Feature Table
 Description: A Table showing which matierals have which features
-Category: reference
 TOC: Material Table
 
 The most common materials in three.js are the Mesh materials. Here

threejs/lessons/threejs-materials.md

@@ -1,6 +1,5 @@
 Title: Three.js Materials
 Description: Materials in Three.js
-Category: fundamentals
 TOC: Materials
 
 This article is part of a series of articles about three.js. The

threejs/lessons/threejs-multiple-scenes.md

@@ -1,6 +1,5 @@
 Title: Three.js Multiple Canvases Multiple Scenes
 Description: How to draw stuff all over the page with THREE.js
-Category: solutions
 TOC: Multiple Canvases, Multiple Scenes
 
 A common question is how to use THREE.js with multiple canvases.

threejs/lessons/threejs-offscreencanvas.md

@@ -1,6 +1,5 @@
 Title: Three.js OffscreenCanvas
 Description: How to use three.js in a web worker
-Category: optimization
 TOC: Using OffscreenCanvas in a Web Worker
 
 [`OffscreenCanvas`](https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCanvas)

threejs/lessons/threejs-optimize-lots-of-objects-animated.md

@@ -1,6 +1,5 @@
 Title: Three.js Optimize Lots of Objects Animated
 Description: Animated merged objects with Morphtargets
-Category: optimization
 TOC: Optimizing Lots of Objects Animated
 
 This article is a continuation of [an article about optimizing lots of objects

threejs/lessons/threejs-optimize-lots-of-objects.md

@@ -1,6 +1,5 @@
 Title: Three.js Optimize Lots of Objects
 Description: Optimize by merging Objects
-Category: optimization
 TOC: Optimizing Lots of Objects
 
 This article is part of a series of articles about three.js. The first article

threejs/lessons/threejs-picking.md

@@ -1,6 +1,5 @@
 Title: Three.js Picking
 Description: Selecting Objects with the Mouse in Three.js
-Category: solutions
 TOC: Picking Objects with the mouse
 
 *Picking* refers to the process of figuring out which object a user clicked on or touched. There are tons of ways to implement picking each with their tradeoffs. Let's go over the 2 most common.

threejs/lessons/threejs-post-processing-3dlut.md

@@ -1,6 +1,5 @@
 Title: Three.js Post Processing 3DLUT
 Description: How to implement a 3DLUT Post Process in THREE.js
-Category: solutions
 TOC: Applying a LUT File for effects
 
 In the last article we went over [post processing](threejs-post-processing.html).

threejs/lessons/threejs-post-processing.md

@@ -1,6 +1,5 @@
 Title: Three.js Post Processing
 Description: How to Post Process in THREE.js
-Category: solutions
 TOC: Post Processing
 
 *Post processing* generally refers to applying some kind of effect or filter to

threejs/lessons/threejs-prerequisites.md

@@ -1,6 +1,5 @@
 Title: Three.js Prerequisites
 Description: What you need to know to use this site.
-Category: basics
 TOC: Prerequisites
 
 These articles are meant to help you learn how to use three.js.

threejs/lessons/threejs-primitives.md

@@ -1,6 +1,5 @@
 Title: Three.js Primitives
 Description: A tour of three.js primitives.
-Category: fundamentals
 TOC: Primitives
 
 This article is one in a series of articles about three.js.

threejs/lessons/threejs-rendering-on-demand.md

@@ -1,6 +1,5 @@
 Title: Three.js Rendering on Demand
 Description: How to use less energy.
-Category: tips
 TOC: Rendering On Demand
 
 The topic might be obvious to many people but just in case ... most Three.js

threejs/lessons/threejs-rendertargets.md

@@ -1,6 +1,5 @@
 Title: Three.js Render Targets
 Description: How to render to a texture.
-Category: fundamentals
 TOC: Render Targets
 
 A render target in three.js is basicaly a texture you can render to.

threejs/lessons/threejs-responsive.md

@@ -1,6 +1,5 @@
 Title: Three.js Responsive Design
 Description: How to make your three.js fit different sized displays.
-Category: basics
 TOC: Responsive Design
 
 This is the second article in a series of articles about three.js.

threejs/lessons/threejs-scenegraph.md

@@ -1,6 +1,5 @@
 Title: Three.js Scene Graph
 Description: What's a scene graph?
-Category: fundamentals
 TOC: Scenegraph
 
 This article is part of a series of articles about three.js. The

threejs/lessons/threejs-setup.md

@@ -1,6 +1,5 @@
 Title: Three.js Setup
 Description: How to setup your development environment for three.js
-Category: basics
 TOC: Setup
 
 This article is one in a series of articles about three.js.

threejs/lessons/threejs-shadertoy.md

@@ -1,6 +1,5 @@
 Title: Three.js and Shadertoy
 Description: How to use Shadertoy shaders in THREE.js
-Category: solutions
 TOC: Using Shadertoy shaders
 
 [Shadertoy](https://shadertoy.com) is a famous website hosting amazing shader experiments. People often ask how they can use those shaders with Three.js.

threejs/lessons/threejs-shadows.md

@@ -1,6 +1,5 @@
 Title: Three.js Shadows
 Description: Shadows in Three.js
-Category: fundamentals
 TOC: Shadows
 
 This article is part of a series of articles about three.js. The

threejs/lessons/threejs-textures.md

@@ -1,6 +1,5 @@
 Title: Three.js Textures
 Description: Using textures in three.js
-Category: fundamentals
 TOC: Textures
 
 This article is one in a series of articles about three.js.

threejs/lessons/threejs-tips.md

@@ -1,6 +1,5 @@
 Title: Three.js Tips
 Description: Small issues that might trip you up using three.js
-Category: tips
 TOC: #
 
 This article is a collection of small issues you might run into

threejs/lessons/threejs-transparency.md

@@ -1,6 +1,5 @@
 Title: Three.js Transparency
 Description: How to deal with transparency issues in THREE.js
-Category: solutions
 TOC: How to Draw Transparent Objects
 
 Transparency in three.js is both easy and hard.

threejs/lessons/threejs-voxel-geometry.md

@@ -1,6 +1,5 @@
 Title: Three.js Voxel(Minecraft Like) Geometry
 Description: How to make voxel geometry like Minecraft
-Category: solutions
 TOC: Making Voxel Geometry (Minecraft)
 
 I've seen this topic come up more than once in various places.

threejs/lessons/threejs-webvr-look-to-select.md

@@ -1,6 +1,5 @@
 Title: Three.js WebVR - Look to Select
 Description: How to implement Look to Select.
-Category: webvr
 TOC: WebVR - Look To Select
 
 **NOTE: The examples on this page require a VR capable

threejs/lessons/threejs-webvr-point-to-select.md

@@ -1,6 +1,5 @@
 Title: Three.js WebVR - 3DOF Point to Select
 Description: How to implement 3DOF Point to Select.
-Category: webvr
 TOC: WebVR - Point To Select
 
 **NOTE: The examples on this page require a VR capable

threejs/lessons/threejs-webvr.md

@@ -1,6 +1,5 @@
 Title: Three.js WebVR
 Description: How to use Virtual Reality in Three.js.
-Category: webvr
 TOC: WebVR - Basics
 
 Making WebVR apps in three.js is pretty simple. You basically just have to tell

threejs/lessons/zh_cn/threejs-fundamentals.md

@@ -1,6 +1,5 @@
 Title: Three.js基础
 Description: 学习Three.js的第一篇文章
-Category: basics
 TOC: 基础
 
 这是Three.js系列文章的第一篇。

threejs/lessons/zh_cn/threejs-prerequisites.md

@@ -1,6 +1,5 @@
 Title: Three.js先决条件
 Description: 使用此网站你需要了解的。
-Category: basics
 TOC: 先决条件
 
 这些文章意在帮助你学习如何使用three.js。

threejs/lessons/zh_cn/threejs-responsive.md

@@ -1,6 +1,5 @@
 Title: Three.js响应式设计
 Description: 如何让你的three.js适应不同尺寸的显示器。
-Category: basics
 TOC: 响应式设计
 
 这是three.js系列文章的第二篇。

threejs/lessons/zh_cn/threejs-setup.md

@@ -1,6 +1,5 @@
 Title: Three.js设置
 Description: 如何为你的three.js设置开发环境
-Category: basics
 TOC: 设置
 
 这是three.js系列文章的其中之一。