@arcgis/core
Version:
ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API
10 lines (9 loc) • 616 B
JavaScript
/* COPYRIGHT Esri - https://js.arcgis.com/5.0.8/LICENSE.txt */
import{glsl as a}from"../../shaderModules/glsl.js";function e(e){e.fragment.code.add(a`vec4 textureAtlasLookup(sampler2D tex, vec2 textureCoordinates, vec4 atlasRegion) {
vec2 atlasScale = atlasRegion.zw - atlasRegion.xy;
vec2 uvAtlas = fract(textureCoordinates) * atlasScale + atlasRegion.xy;
float maxdUV = 0.125;
vec2 dUVdx = clamp(dFdx(textureCoordinates), -maxdUV, maxdUV) * atlasScale;
vec2 dUVdy = clamp(dFdy(textureCoordinates), -maxdUV, maxdUV) * atlasScale;
return textureGrad(tex, uvAtlas, dUVdx, dUVdy);
}`)}export{e as TextureAtlasLookup};