Function intersectbox

source/src/weapon.cpp:214–246

}

static inline bool intersectbox(const vec &o, const vec &rad, const vec &from, const vec &to, vec *end) // if lineseg hits entity bounding box
{
    const vec *p;
    vec v = to, w = o;
    v.sub(from);
    w.sub(from);
    float c1 = w.dot(v);

    if(c1<=0) p = &from;
    else
    {
        float c2 = v.squaredlen();
        if(c2<=c1) p = &to;
        else
        {
            float f = c1/c2;
            v.mul(f).add(from);
            p = &v;
        }
    }

    if(p->x <= o.x+rad.x
       && p->x >= o.x-rad.x
       && p->y <= o.y+rad.y
       && p->y >= o.y-rad.y
       && p->z <= o.z+rad.z
       && p->z >= o.z-rad.z)
    {
        if(end) *end = *p;
        return true;
    }
    return false;
}

static inline bool intersectsphere(const vec &from, const vec &to, vec center, float radius, float &dist)
{