00001 /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */ 00002 /* 00003 * Copyright (c) 1997 Regents of the University of California. 00004 * All rights reserved. 00005 * 00006 * Redistribution and use in source and binary forms, with or without 00007 * modification, are permitted provided that the following conditions 00008 * are met: 00009 * 1. Redistributions of source code must retain the above copyright 00010 * notice, this list of conditions and the following disclaimer. 00011 * 2. Redistributions in binary form must reproduce the above copyright 00012 * notice, this list of conditions and the following disclaimer in the 00013 * documentation and/or other materials provided with the distribution. 00014 * 3. All advertising materials mentioning features or use of this software 00015 * must display the following acknowledgement: 00016 * This product includes software developed by the Computer Systems 00017 * Engineering Group at Lawrence Berkeley Laboratory. 00018 * 4. Neither the name of the University nor of the Laboratory may be used 00019 * to endorse or promote products derived from this software without 00020 * specific prior written permission. 00021 * 00022 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00023 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00024 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00025 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00026 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00027 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00028 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00029 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00030 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00031 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00032 * SUCH DAMAGE. 00033 */ 00034 /* Ported from CMU/Monarch's code, nov'98 -Padma. 00035 omni-antenna.h 00036 omni-directional antenna 00037 00038 */ 00039 00040 #ifndef ns_omniantenna_h 00041 #define ns_omniantenna_h 00042 00043 #include <antenna.h> 00044 00045 class OmniAntenna : public Antenna { 00046 00047 public: 00048 OmniAntenna(); 00049 00050 virtual double getTxGain(double, double, double, double) 00051 // return the gain for a signal to a node at vector dX, dY, dZ 00052 // from the transmitter at wavelength lambda 00053 { 00054 return Gt_; 00055 } 00056 virtual double getRxGain(double, double, double, double) 00057 // return the gain for a signal from a node at vector dX, dY, dZ 00058 // from the receiver at wavelength lambda 00059 { 00060 return Gr_; 00061 } 00062 00063 virtual Antenna * copy() 00064 // return a pointer to a copy of this antenna that will return the 00065 // same thing for get{Rx,Tx}Gain that this one would at this point 00066 // in time. This is needed b/c if a pkt is sent with a directable 00067 // antenna, this antenna may be have been redirected by the time we 00068 // call getTxGain on the copy to determine if the pkt is received. 00069 { 00070 // since the Gt and Gr are constant w.r.t time, we can just return 00071 // this object itself 00072 return this; 00073 } 00074 00075 virtual void release() 00076 // release a copy created by copy() above 00077 { 00078 // don't do anything 00079 } 00080 00081 protected: 00082 double Gt_; // gain of transmitter (db) 00083 double Gr_; // gain of receiver (db) 00084 }; 00085 00086 00087 #endif // ns_omniantenna_h