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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draw tile maps. */ export const TILEMAP_F = `#version 300 es precision highp float; //in in vec2 v_texcoord; uniform vec4 u_color; /* [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. */ uniform mat4 u_tileData; uniform mediump usampler2D u_mapDataTexture; uniform sampler2D u_texture; //local //texture tile image coordinates vec2 subTexcoord; //map data tile position. vec2 mapTilecoord; //Drawing coordinate. vec2 drawCoord; //out out vec4 outColor; void main() { //get this tile xy coordinate to obtain the tile ID. mapTilecoord.x = floor(u_tileData[1][2] + (v_texcoord.x * u_tileData[1][0])) / (u_tileData[0][0] - 1.0f); mapTilecoord.y = floor(u_tileData[1][3] + (v_texcoord.y * u_tileData[1][1])) / (u_tileData[0][1] - 1.0f); //get the tile ID from the texture. float tileID = float(texture(u_mapDataTexture, mapTilecoord).r); //get xy positions of texture from the ID, normalized. subTexcoord.x = -mod(tileID, u_tileData[0][2]) / u_tileData[0][2]; subTexcoord.y = (-floor(tileID / u_tileData[0][2]) / u_tileData[0][3]); drawCoord.x = fract(v_texcoord.x * u_tileData[1][0]); drawCoord.y = fract(v_texcoord.y * u_tileData[1][1]); drawCoord.x /= u_tileData[0][2]; drawCoord.y /= u_tileData[0][3]; drawCoord.x -= subTexcoord.x; drawCoord.y -= subTexcoord.y; vec4 fragColor = texture(u_texture , drawCoord) * u_color; if (fragColor.a < 0.6) { discard; } outColor = vec4(fragColor.rgb, u_color.a); } `;</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>