type Node = any;
/**
 * Helper functions for working with TSL Nodes
 */
/**
 * Check if a node value is approximately zero
 * @param node - Node to check
 * @param epsilon - Threshold for "zero" (default 0.001)
 */
export declare function isNearZero(node: Node, epsilon?: number): Node;
/**
 * Safe divide that avoids division by zero
 * @param numerator - Numerator node
 * @param denominator - Denominator node
 * @param fallback - Value to return if denominator is near zero (default 0)
 */
export declare function safeDivide(numerator: Node, denominator: Node, fallback?: number): Node;
/**
 * Unpack normal from texture space [0,1] to tangent space [-1,1]
 * @param normalSample - Normal sampled from texture
 */
export declare function unpackNormal(normalSample: Node): Node;
/**
 * Pack normal from tangent space [-1,1] to texture space [0,1]
 * @param normal - Normal in tangent space
 */
export declare function packNormal(normal: Node): Node;
/**
 * Create a default flat normal (pointing up in tangent space)
 */
export declare function flatNormal(): Node;
/**
 * Create a default white color
 */
export declare function whiteColor(): Node;
/**
 * Create a default black color
 */
export declare function blackColor(): Node;
/**
 * Create a default gray color
 * @param value - Gray value (0-1)
 */
export declare function grayColor(value?: number): Node;
/**
 * Ensure a normal vector is normalized
 * @param normal - Normal vector to normalize
 */
export declare function ensureNormalized(normal: Node): Node;
/**
 * Convert a scalar to a uniform color
 * @param scalar - Scalar value
 */
export declare function scalarToColor(scalar: Node): Node;
export {};
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