Function collide_downward

src/SB/Core/x/xEnt.cpp:412–456

    }

    bool collide_downward(xVec3& loc, xEnt*& hit, xScene& s, xEnt& ent, F32 max_dist)
    {
        xRay3 ray;
        U8 old_bound_type;
        F32 old_bound_radius;
        xCollis coll;

        F32 f31 = get_lower_extent(ent.bound);
        xVec3* r30 = xBoundCenter(&ent.bound);

        ray.origin = *r30;
        ray.dir.assign(0.0f, -1.0f, 0.0f);
        ray.min_t = 0.0f;
        ray.max_t = max_dist + f31;
        ray.flags = 0xC00;

        old_bound_type = ent.bound.type;
        old_bound_radius = ent.bound.sph.r;

        ent.bound.type = XBOUND_TYPE_SPHERE;
        ent.bound.sph.r = 0.0f;

        r30->y = FLOAT_MAX;

        coll.flags = 0x100;

        xRayHitsSceneFlags(&s, &ray, &coll, XENT_COLLTYPE_PLYR, 0x26);

        ent.bound.type = old_bound_type;
        ent.bound.sph.r = old_bound_radius;

        r30->y = ray.origin.y;

        if (!(coll.flags & 0x1))
        {
            return false;
        }

        loc = *(xVec3*)&ent.model->Mat->pos;
        loc.y -= coll.dist - f31;

        hit = (xEnt*)coll.optr;

        return true;
    }

    void drop_stacked_entity(xEnt&);