<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="For each window, we interpolate the $x$-coordinate. Here, we pre-compute and store the coefficients of the interpolation polynomial."><title>compute_lagrange_coeffs in halo2_gadgets::ecc::chip::constants - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../../static.files/SourceSerif4-Bold-a2c9cd1067f8b328.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><linkrel="stylesheet"href="../../../../static.files/normalize-76eba96aa4d2e634.css"><linkrel="stylesheet"href="../../../../static.files/rustdoc-c4dbdcde0fbd8430.css"id="mainThemeStyle"><divid="rustdoc-vars"data-root-path="../../../../"data-static-root-path="../../../../static.files/"data-current-crate="halo2_gadgets"data-themes=""data-resource-suffix=""data-rustdoc-version="1.70.0-nightly (1db9c061d 2023-03-21)"data-search-js="search-a6dd7f063a44c279.js"data-settings-js="settings-f0c5c39777a9a2f6.js"data-settings-css="settings-0bcba95ff279c1db.css"data-theme-light-css="light-db279b6232be9c13.css"data-theme-dark-css="dark-cf923f49f397b216.css"data-theme-ayu-css="ayu-be46fdc453a55015.css"></div><scriptsrc="../../../../static.files/storage-9184409068f70b79.js"></script><scriptdefersrc="sidebar-items.js"></script><scriptdefersrc="../../../../static.files/main-f5a2577c5297a973.js"></script><noscript><linkrel="stylesheet"media="(prefers-color-scheme:light)"href="../../../../static.files/light-db279b6232be9c13.css"><linkrel="stylesheet"media="(prefers-color-scheme:dark)"href="../../../../static.files/dark-cf923f49f397b216.css"><linkrel="stylesheet"href="../../../../static.files/noscript-13285aec31fa243e.css"></noscript><linkrel="alternate icon"type="image/png"href="../../../../static.files/favicon-16x16-8b506e7a72182f1c.png"><linkrel="alternate icon"type="image/png"href="../../../../static.files/favicon-32x32-422f7d1d52889060.png"><linkrel="icon"type="image/svg+xml"href="../../../../static.files/favicon-2c020d218678b618.svg"><linkrel="stylesheet"href="https://cdn.jsdelivr.net/npm/katex@0.10.0/dist/katex.min.css"integrity="sha384-9eLZqc9ds8eNjO3TmqPeYcDj8n+Qfa4nuSiGYa6DjLNcv9BtN69ZIulL9+8CqC9Y"crossorigin="anonymous">
</head><bodyclass="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="mobile-topbar"><buttonclass="sidebar-menu-toggle">☰</button><aclass="logo-container"href="../../../../halo2_gadgets/index.html"><imgclass="rust-logo"src="../../../../static.files/rust-logo-151179464ae7ed46.svg"alt="logo"></a><h2></h2></nav><navclass="sidebar"><aclass="logo-container"href="../../../../halo2_gadgets/index.html"><imgclass="rust-logo"src="../../../../static.files/rust-logo-151179464ae7ed46.svg"alt="logo"></a><divclass="sidebar-elems"><h2><ahref="index.html">In halo2_gadgets::ecc::chip::constants</a></h2></div></nav><main><divclass="width-limiter"><navclass="sub"><formclass="search-form"><span></span><inputclass="search-input"name="search"aria-label="Run search in the documentation"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><divid="help-button"title="help"tabindex="-1"><ahref="../../../../help.html">?</a></div><divid="settings-menu"tabindex="-1"><ahref="../../../../settings.html"title="settings"><imgwidth="22"height="22"alt="Change settings"src="../../../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><sectionid="main-content"class="content"><divclass="main-heading"><h1>Function <ahref="../../../index.html">halo2_gadgets</a>::<wbr><ahref="../../index.html">ecc</a>::<wbr><ahref="../index.html">chip</a>::<wbr><ahref="index.html">constants</a>::<wbr><aclass="fn"href="#">compute_lagrange_coeffs</a><buttonid="copy-path"title="Copy item path to clipboard"><imgsrc="../../../../static.files/clipboard-7571035ce49a181d.svg"width="19"height="18"alt="Copy item path"></button></h1><spanclass="out-of-band"><aclass="srclink"href="../../../../src/halo2_gadgets/ecc/chip/constants.rs.html#86-106">source</a> · <buttonid="toggle-all-docs"title="collapse all docs">[<span>−</span>]</button></span></div><preclass="rust item-decl"><code>pub fn compute_lagrange_coeffs<C: CurveAffine>(
) -><aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><[C::Base; <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.array.html">8</a>]><ahref="#"class="tooltip"data-notable-ty="Vec<[C::Base; 8]>">ⓘ</a></code></pre><detailsclass="toggle top-doc"open><summaryclass="hideme"><span>Expand description</span></summary><divclass="docblock"><p>For each window, we interpolate the $x$-coordinate.