seed-engine

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A Lightweight 2D game engine using WebGL2. The engine is designed on the focus of creating a bridge between creating and publishing games to the Seed Network as modules.

github.com/JaegarSarauer/SeedGameEngine

JaegarSarauer/SeedGameEngine

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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <base data-ice="baseUrl" href="../../../"> <title data-ice="title">src/component/RenderableText.js | seed-engine</title> <link type="text/css" rel="stylesheet" href="css/style.css"> <link type="text/css" rel="stylesheet" href="css/prettify-tomorrow.css"> <script src="script/prettify/prettify.js"></script> <script src="script/manual.js"></script> <meta name="description" content="A Lightweight 2D game engine using WebGL2. The engine is designed on the focus of creating a bridge between creating and publishing games to the Seed Network as modules."><meta property="twitter:card" content="summary"><meta property="twitter:title" content="seed-engine"><meta property="twitter:description" content="A Lightweight 2D game engine using WebGL2. 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href="function/index.html#static-function-degToRad">degToRad</a></li> <li data-ice="doc">F<a href="function/index.html#static-function-radToDeg">radToDeg</a></li> </ul> </div> </nav> <div class="content" data-ice="content"><h1 data-ice="title">src/component/RenderableText.js</h1> <pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">import Renderable from './Renderable'; import Matrix3 from '../render/WebGL/Matrix3'; import ProgramManager from '../manager/ProgramManager'; import TextureManager from '../manager/TextureManager'; import RenderManager from '../manager/RenderManager'; import Renderable2DMultitex from './Renderable2DMultitex'; /** * RenderableText is a renderable component which renders a line of text from a * collection of string data. The string data is loaded into the GPU using textures */ export default class RenderableText extends Renderable2DMultitex { constructor(fontTexture) { super(ProgramManager.getProgram('2DGrid')); this.className = 'RenderableText'; this.renderableTextID = -1; this.textData = { //text in string form text: '', //text in indexable columns of the font texture. Represents an x value and a range of y values (automatically handled by the shader). textPixelArray: [], //width of the entire string and and formatting in px. textPixelWidth: 0 }; /* An array representing a matrix4. Should be replaced with a Matrix4 instance. [0][0] = 0 = Map data tiles width. [0][1] = 1 = Map data tiles height. [0][2] = 2 = Map tiles in the texture width. [0][3] = 3 = Map tiles in the texture height. [1][0] = 4 = Map viewport width. [1][1] = 5 = Map viewport height. [1][2] = 6 = Map viewport x1. [1][3] = 7 = Map viewport y1. [2][0] = 8 = TileSize width normalized. [2][1] = 9 = TileSize height normalized. */ this.shaderFontData = []; this.fontTexture = fontTexture; this.addTexture(fontTexture); this.setGridData(); } onPause() { this.requestRedraw(); } onUnpause() { this.requestRedraw(); } setGridData() { //text storage max width of 1024 px. let width = 1024; //1024 lines of text storeable. let height = 1024; //assigns an ID and sets up the statically used text data texture. RenderManager.registerTextRenderable(this, width, height); this.addTexture(TextureManager.getTexture('TextData')); //additional data for the shader for font data and such. this.buildShaderTileData(); } setText(textString, fontScale) { fontScale = Math.round(fontScale); this.textData.text = textString; this.textData.textPixelArray = []; this.textData.textPixelWidth = 0; for (let i = 0; i < textString.length; i++) { let char = textString[i]; let charData = this.fontTexture.glyphInfo[char]; if (charData == null) continue; for (let x = charData.x; x < charData.x + charData.width; x++) { this.textData.textPixelArray.push(x + (charData.row * this.fontTexture.width)); } } this.textData.textPixelWidth = this.textData.textPixelArray.length; this.gameObject.transform.setScale(this.textData.textPixelWidth * fontScale, this.fontTexture.glyphInfo.height * fontScale); TextureManager.updateDataTexture('TextData', new Uint16Array(this.textData.textPixelArray), 0, this.renderableTextID, this.textData.textPixelWidth, 1); this.buildShaderTileData(); } setTextAlign(textAlign) { if (textAlign == 'center') { this.textAlign = 1; } else if (textAlign == 'right') { this.textAlign = 2; } else { this.textAlign = 0; } } buildShaderTileData() { this.shaderFontData = [ 1024, 1024, this.fontTexture.width, Math.floor(this.fontTexture.height / this.fontTexture.frameHeight), this.textData.textPixelWidth, 1, 0, this.renderableTextID, 0.015625, 0.2, 1, 1, 1, 1, 1, 1 ]; } setUniformData(positionMatrix) { if (this.textures.length < 2) return false; this.program.setUniforms({ 'u_color': this.color.color, 'u_matrix': positionMatrix, 'u_depth': this.depth, 'u_tileData': this.shaderFontData, 'u_texture': 0, 'u_mapDataTexture': 1, }); return true; } }</code></pre> </div> <footer class="footer"> Generated by <a href="https://esdoc.org">ESDoc(1.1.0)<img src="./image/esdoc-logo-mini-black.png"></a> </footer> <script src="script/search_index.js"></script> <script src="script/search.js"></script> <script src="script/pretty-print.js"></script> <script src="script/inherited-summary.js"></script> <script src="script/test-summary.js"></script> <script src="script/inner-link.js"></script> <script src="script/patch-for-local.js"></script> </body> </html>