/**
 * Encode block coordinates to Morton code (17 bits per axis = 51 bits total).
 * Supports up to 131,072 blocks per axis.
 *
 * @param x - Block X coordinate
 * @param y - Block Y coordinate
 * @param z - Block Z coordinate
 * @returns Morton code with interleaved bits: ...z2y2x2 z1y1x1 z0y0x0
 */
declare function xyzToMorton(x: number, y: number, z: number): number;
/**
 * Count the number of set bits in a 32-bit integer.
 *
 * @param n - 32-bit integer
 * @returns Number of bits set to 1
 */
declare function popcount(n: number): number;
/**
 * Check if a voxel mask represents a solid block (all 64 bits set).
 *
 * @param lo - Lower 32 bits of mask
 * @param hi - Upper 32 bits of mask
 * @returns True if all 64 voxels are solid
 */
declare function isSolid(lo: number, hi: number): boolean;
/**
 * Check if a voxel mask represents an empty block (no bits set).
 *
 * @param lo - Lower 32 bits of mask
 * @param hi - Upper 32 bits of mask
 * @returns True if all 64 voxels are empty
 */
declare function isEmpty(lo: number, hi: number): boolean;
export { xyzToMorton, popcount, isSolid, isEmpty };