Организовать запрет установку модели в плотную к текстуре (стене и т.д)

public create_barnacle(id)
{
    if (g_barnacleCount[id] > 0)
    {
        new origin[3], Float:fOrigin[3]
        get_user_origin(id, origin, 3)
        IVecFVec(origin, fOrigin)
         
        fOrigin[2] -= 2.0
        new const Float:direction[4][3] = {{5.0, 0.0, 0.0}, {-5.0, 0.0, 0.0}, {0.0, 5.0, 0.0}, {0.0, -5.0, 0.0}}
        new Float:temp[3]
        xs_vec_copy(fOrigin, temp)
        new i
        for (i = 0; i < 4; i++)
        {
            xs_vec_add(fOrigin, direction[i], temp)
            if (engfunc(EngFunc_PointContents, temp) != -1)
                break
        }
         
        if (i != 4)
            client_print(id, print_center, "Эту Ловушку нужно ставить на потолок !")
        else
        {
            fOrigin[2] += 2.0
            new ent = engfunc(EngFunc_CreateNamedEntity,engfunc(EngFunc_AllocStr
ing,"info_target"))
         
            set_pev(ent,pev_classname, barnacle_class)
            engfunc(EngFunc_SetModel, ent, "models/zp_trap/zp_trap2.mdl")
          
            set_pev(ent, pev_iuser1, id)
          
            set_pev(ent, pev_mins, Float:{-16.0,-16.0, -36.0})
            set_pev(ent, pev_maxs, Float:{16.0,16.0,0.0})
            set_pev(ent, pev_size, Float:{-16.0,-16.0, -36.0,16.0,16.0,0.0})
            engfunc(EngFunc_SetSize, ent, Float:{-16.0,-16.0,-36.0}, Float:{16.0,16.0,0.0})
             
            set_pev(ent, pev_solid, SOLID_BBOX)
            set_pev(ent, pev_movetype, MOVETYPE_FLY)
         
            set_pev(ent, pev_health, get_pcvar_float(g_CvarHP) + HEALTH_OFFSET)
            set_pev(ent, pev_takedamage, 1.0)
         
            set_pev(ent, pev_dmg, 1.0)
         
            set_pev(ent, pev_maxspeed, 20.0)
         
            set_pev(ent,pev_flags, FL_MONSTER|FL_MONSTERCLIP)
         
            set_pev(ent, pev_origin, fOrigin)
             
            set_pev(ent, pev_animtime, 10.0)
            set_pev(ent, pev_framerate, 0.5)
            set_pev(ent, pev_sequence, idle3)
            set_pev(ent, pev_gaitsequence, idle3)
             
            set_pev(ent, pev_nextthink,get_gametime() + THINK_DELAY)
             
            g_barnacleCount[id]--
 
            client_print(id, print_center, "Осталось Ловушек : %d", g_barnacleCount[id])
        }
    }
    else
        client_print(id, print_center, "Больше нет Ловушек !")
}