@woosh/meep-engine/src/core/geom/2d/aabb/aabb2_array_combine.js

Pure JavaScript game engine. Fully featured and production ready.

import { max2 } from "../../../math/max2.js";
import { min2 } from "../../../math/min2.js";

/**
 * Merge bounds of two axis-aligned bounding boxes, the result is a box that tightly bounds inputs
 * @param {ArrayLike<number>|number[]|Float32Array} result where resulting value is written to
 * @param {number} result_offset
 * @param {ArrayLike<number>|number[]|Float32Array} a
 * @param {number} a_offset
 * @param {ArrayLike<number>|number[]|Float32Array} b
 * @param {number} b_offset
 */
export function aabb2_array_combine(
    result, result_offset,
    a, a_offset,
    b, b_offset
) {

    const a_x0 = a[a_offset];
    const a_y0 = a[a_offset + 1];
    const a_x1 = a[a_offset + 2];
    const a_y1 = a[a_offset + 3];

    const b_x0 = b[b_offset];
    const b_y0 = b[b_offset + 1];
    const b_x1 = b[b_offset + 2];
    const b_y1 = b[b_offset + 3];

    result[result_offset] = min2(a_x0, b_x0);
    result[result_offset + 1] = min2(a_y0, b_y0);

    result[result_offset + 2] = max2(a_x1, b_x1);
    result[result_offset + 3] = max2(a_y1, b_y1);

}