@thi.ng/shader-ast-stdlib/color/cosine-gradient.d.ts

Function collection for modular GPGPU / shader programming with @thi.ng/shader-ast

import { type FloatTerm, type Vec3Term } from "@thi.ng/shader-ast";
/**
 * Inline function. Computes the unclamped cosine-based color gradient value:
 * `a+b*cos(2π*(c*t+d))`, where `a`..`d` are the gradient coefficients and `t`
 * the gradient position in the `[0,1]` interval.
 *
 * @remarks
 * Based on technique by Inigo Quilez
 *
 * References:
 *
 * - https://iquilezles.org/articles/palettes/
 * - https://github.com/thi-ng/umbrella/tree/develop/packages/color#cosine-gradients
 *
 * @example
 * ```ts
 * import { cosineGradient, COSINE_GRADIENTS } from "@thi.ng/shader-ast-stdlib";
 *
 * const rgb = cosineGradient(...COSINE_GRADIENTS["rainbow1"], 0.8)
 * ```
 *
 * @param a
 * @param b
 * @param c
 * @param d
 * @param t
 */
export declare const cosineGradient: (a: Vec3Term, b: Vec3Term, c: Vec3Term, d: Vec3Term, t: FloatTerm) => import("@thi.ng/shader-ast").Op2<"vec3">;
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