Function intersectsphere

source/src/weapon.cpp:248–260

}

static inline bool intersectsphere(const vec &from, const vec &to, vec center, float radius, float &dist)
{
    vec ray(to);
    ray.sub(from);
    center.sub(from);
    float v = center.dot(ray),
          inside = radius*radius - center.squaredlen();
    if(inside < 0 && v < 0) return false;
    float raysq = ray.squaredlen(), d = inside*raysq + v*v;
    if(d < 0) return false;
    dist = (v - sqrtf(d)) / raysq;
    return dist >= 0 && dist <= 1;
}

static inline bool intersectcylinder(const vec &from, const vec &to, const vec &start, const vec &end, float radius, float &dist)
{