/*
    Read

        http://z0b.kapsi.fi/snippets.php

    before using this code. Thank you.
*/

float distanceFromPointToAABB(const math::vec3 &min,
                              const math::vec3 &max,
                              const math::vec3 &p)
{
    // if the point is inside the box, return zero
    if (p.x >= min.x && p.x <= max.x &&
        p.y >= min.y && p.y <= max.y &&
        p.z >= min.z && p.z <= max.z)
        return 0.0f;

    // clamp the point inside the min/max box points
    math::vec3 test = p;

    for (size_t i = 0; i < 3; i++) {
        if (test[i] < min[i])
            test[i] = min[i];

        if (test[i] > max[i])
            test[i] = max[i];
    }

    return p.distance(test);
}