<!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="Returns information about a fixed point that is required by `EccChip`."><title>FixedPoint in halo2_gadgets::ecc::chip - 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-1def573a4779b29b.css"id="mainThemeStyle"><linkrel="stylesheet"id="themeStyle"href="../../../static.files/light-d59023bfa12059d2.css"><linkrel="stylesheet"disabledhref="../../../static.files/dark-1ca41bb1e10af075.css"><linkrel="stylesheet"disabledhref="../../../static.files/ayu-18b4181a2f3fb862.css"><scriptsrc="../../../static.files/storage-3891ce972e3a2bf8.js"></script><scriptdefersrc="sidebar-items.js"></script><scriptdefersrc="../../../static.files/main-98a684e84ae5b08b.js"></script><noscript><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 trait"><!--[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><h2class="location"><ahref="#">FixedPoint</a></h2><divclass="sidebar-elems"><section><h3><ahref="#required-associated-types">Required Associated Types</a></h3><ulclass="block"><li><ahref="#associatedtype.FixedScalarKind">FixedScalarKind</a></li></ul><h3><ahref="#required-methods">Required Methods</a></h3><ulclass="block"><li><ahref="#tymethod.generator">generator</a></li><li><ahref="#tymethod.u">u</a></li><li><ahref="#tymethod.z">z</a></li></ul><h3><ahref="#provided-methods">Provided Methods</a></h3><ulclass="block"><li><ahref="#method.lagrange_coeffs">lagrange_coeffs</a></li></ul><h3><ahref="#implementors">Implementors</a></h3></section><h2><ahref="index.html">In halo2_gadgets::ecc::chip</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>Trait <ahref="../../index.html">halo2_gadgets</a>::<wbr><ahref="../index.html">ecc</a>::<wbr><ahref="index.html">chip</a>::<wbr><aclass="trait"href="#">FixedPoint</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.rs.html#209-226">source</a> · <buttonid="toggle-all-docs"title="collapse all docs">[<span>−</span>]</button></span></div><preclass="rust item-decl"><code>pub trait FixedPoint<C: CurveAffine>: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a> + <aclass="trait"href="https://doc.rust-lang.org/nightly/core/cmp/trait.Eq.html"title="trait core::cmp::Eq">Eq</a> + <aclass="trait"href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html"title="trait core::clone::Clone">Clone</a> {
type <ahref="#associatedtype.FixedScalarKind"class="associatedtype">FixedScalarKind</a>: <aclass="trait"href="trait.FixedScalarKind.html"title="trait halo2_gadgets::ecc::chip::FixedScalarKind">FixedScalarKind</a>;
}</code></pre><detailsclass="toggle top-doc"open><summaryclass="hideme"><span>Expand description</span></summary><divclass="docblock"><p>Returns information about a fixed point that is required by <ahref="struct.EccChip.html"title="EccChip"><code>EccChip</code></a>.</p>
</div></details><h2id="required-associated-types"class="small-section-header">Required Associated Types<ahref="#required-associated-types"class="anchor">§</a></h2><divclass="methods"><detailsclass="toggle"open><summary><sectionid="associatedtype.FixedScalarKind"class="method"><aclass="srclink rightside"href="../../../src/halo2_gadgets/ecc/chip.rs.html#211">source</a><h4class="code-header">type <ahref="#associatedtype.FixedScalarKind"class="associatedtype">FixedScalarKind</a>: <aclass="trait"href="trait.FixedScalarKind.html"title="trait halo2_gadgets::ecc::chip::FixedScalarKind">FixedScalarKind</a></h4></section></summary><divclass="docblock"><p>The kind of scalar that this fixed point can be multiplied by.</p>
</div></details></div><h2id="required-methods"class="small-section-header">Required Methods<ahref="#required-methods"class="anchor">§</a></h2><divclass="methods"><detailsclass="toggle method-toggle"open><summary><sectionid="tymethod.generator"class="method"><aclass="srclink rightside"href="../../../src/halo2_gadgets/ecc/chip.rs.html#214">source</a><h4class="code-header">fn <ahref="#tymethod.generator"class="fn">generator</a>(&self) -> C</h4></section></summary><divclass="docblock"><p>Returns the generator for this fixed point.</p>
</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="tymethod.u"class="method"><aclass="srclink rightside"href="../../../src/halo2_gadgets/ecc/chip.rs.html#217">source</a><h4class="code-header">fn <ahref="#tymethod.u"class="fn">u</a>(&self) -><aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><[<C::Base as PrimeField>::Repr; <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.array.html">8</a>]><ahref="#"class="tooltip"data-notable-ty="Vec<[<C::Base as PrimeField>::Repr; 8]>">ⓘ</a></h4></section></summary><divclass="docblock"><p>Returns the $u$ values for this fixed point.</p>
</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="tymethod.z"class="method"><aclass="srclink rightside"href="../../../src/halo2_gadgets/ecc/chip.rs.html#220">source</a><h4class="code-header">fn <ahref="#tymethod.z"class="fn">z</a>(&self) -><aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>><ahref="#"class="tooltip"data-notable-ty="Vec<u64>">ⓘ</a></h4></section></summary><divclass="docblock"><p>Returns the $z$ value for this fixed point.</p>
</div></details></div><h2id="provided-methods"class="small-section-header">Provided Methods<ahref="#provided-methods"class="anchor">§</a></h2><divclass="methods"><detailsclass="toggle method-toggle"open><summary><sectionid="method.lagrange_coeffs"class="method"><aclass="srclink rightside"href="../../../src/halo2_gadgets/ecc/chip.rs.html#223-225">source</a><h4class="code-header">fn <ahref="#method.lagrange_coeffs"class="fn">lagrange_coeffs</a>(&self) -><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></h4></section></summary><divclass="docblock"><p>Returns the Lagrange coefficients for this fixed point.</p>
