/**
 * Returns signed distance from `p` to centered circle of radius `r`.
 *
 * @param p - vec2
 * @param r - float
 */
export declare const sdfCircle: import("@thi.ng/shader-ast").TaggedFn2<"vec2", "float", "float">;
/**
 * Returns signed distance from `p` to centered sphere of radius `r`.
 *
 * @param p - vec3
 * @param r - float
 */
export declare const sdfSphere: import("@thi.ng/shader-ast").TaggedFn2<"vec3", "float", "float">;
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