@woosh/meep-engine/src/engine/graphics/texture/virtual/tile/compose_finger_print.js

Pure JavaScript game engine. Fully featured and production ready.

import { assert } from "../../../../../core/assert.js";

/**
 *
 * @param {number} mip
 * @param {number} x
 * @param {number} y
 * @returns {number}
 */
export function compose_finger_print(mip, x, y) {
    // validate
    assert.isNonNegativeInteger(x, 'x');
    assert.isNonNegativeInteger(y, 'y');
    assert.isNonNegativeInteger(mip, 'mip');
    assert.lessThan(mip,32,'mip level is too high')

    assert.lessThan(x, (1 << mip), 'x');
    assert.lessThan(y, (1 << mip), 'y');

    return (mip << 24)
        | (x << 16)
        | (y << 8)
        ;
}