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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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Renderable2DGrid will expect one * texture for sprites, and another containing the data for which tile goes where. * Additionaly, viewport support is added to make large maps require one time loads into self * managed data textures. */ export default class Renderable2DGrid extends Renderable2DMultitex { /** * Constructor for Renderable2D grid. Sets up data and initializes a data texture. * * @param {string} mapTilesTextureName Name of sprite sheet texture. * @param {Array} gridData Array of indexes for each tile on the map. * @param {number} width Width of the map. * @param {number} height Height of the map. * @param {number} tileViewWidth Width of the viewport. * @param {number} tileViewHeight Height of the viewport. */ constructor(mapTilesTextureName, gridData, width, height, tileViewWidth, tileViewHeight) { super(ProgramManager.getProgram('2DGrid')); this.className = 'Renderable2DGrid'; this.dataArray = new Uint16Array(width * height); /* [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.shaderTileData = []; this.mapTilesTexture = TextureManager.getTexture(mapTilesTextureName); this.addTexture(this.mapTilesTexture); this.mapTilesDataTextureName = mapTilesTextureName + 'Data' + dataTexCounter++; this.setGridData(gridData, width, height, tileViewWidth, tileViewHeight); } updateDataArray(data, x1, y1, width, height) { if (data == null) return; let dataY = 0; for (let y = y1; y < y1 + height; y++) { this.dataArray.set(data.slice(dataY * width, (dataY + 1) * width), x1 + (y * width)); dataY++; } } /** * Updates the data texture by quadrant. Quadrant is specified by the x1, y1, * width, and height parameters. * * @param {Array} data Array of values indicating the index of each sprite. * @param {number} x1 Top left x position to update. * @param {number} y1 Top left y position to update. * @param {number} width Width (in tiles) of data to update. * @param {number} height Height (in tiles) of data to update. */ updateGridData(data, x1, y1, width, height) { this.updateDataArray(data, x1, y1, width, height); this.buildShaderTileData(x1, y1, width, height); TextureManager.updateDataTexture(this.mapTilesDataTextureName, this.dataArray, x1, y1, width, height); this.requestRedraw(); } /** * * * @param {*} data * @param {*} x1 * @param {*} y1 * @param {*} width * @param {*} height */ updateGridDataViewport(data, x1, y1, width, height, viewportWidth, viewportHeight) { this.updateDataArray(data, x1, y1, width, height); this.buildShaderTileData(x1, y1, viewportWidth, viewportHeight); TextureManager.updateDataTexture(this.mapTilesDataTextureName, this.dataArray, x1, y1, width, height); this.requestRedraw(); } setGridData(data, width, height, tileViewWidth, tileViewHeight) { this.updateDataArray(data, 0, 0, width, height); let texture = TextureManager.addDataTexture(this.mapTilesDataTextureName, this.dataArray, RenderManager.GL.R16UI, RenderManager.GL.RED_INTEGER, RenderManager.GL.UNSIGNED_SHORT, -1, -1, width, height); this.addTexture(texture); /* [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.shaderTileData = [ width, height, this.mapTilesTexture.framesWidth, this.mapTilesTexture.framesHeight, tileViewWidth, tileViewHeight, 0, 0, 1 / this.mapTilesTexture.framesWidth, 1 / this.mapTilesTexture.framesHeight, 1, 1, 1, 1, 1, 1 ]; } /** * Sets the viewport of the map grid to x1, y1, width, height (in tiles). * * @param {number} viewportX1 Top left x position of the viewport. * @param {number} viewportY1 Top left y position of the viewport. * @param {number} viewportWidth Width of the viewport * @param {number} viewportHeight */ buildShaderTileData(viewportX1, viewportY1, viewportWidth, viewportHeight) { this.shaderTileData[4] = viewportWidth; this.shaderTileData[5] = viewportHeight; this.shaderTileData[6] = viewportX1; this.shaderTileData[7] = viewportY1; } onEnd() { this.removeFromViewports(); TextureManager.removeTexture(this.mapTilesDataTextureName); } /** * Updates the uniforms of this renderable. Requires a position matrix for * perspective calculations by the RendererManager. * * @param {Matrix3} positionMatrix Position matrix of this renderable. */ 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.shaderTileData, '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>