dir-antenna.patch

diff --git a/Makefile.in b/Makefile.in
index 638b9fb..bde5865 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -246,7 +246,7 @@ OBJ_CC = \
 	mobile/mip.o mobile/mip-reg.o mobile/gridkeeper.o \
 	mobile/propagation.o mobile/tworayground.o \
 	mobile/nakagami.o \
-	mobile/antenna.o mobile/omni-antenna.o \
+	mobile/antenna.o mobile/omni-antenna.o mobile/dir-antenna.o \
 	mobile/shadowing.o mobile/shadowing-vis.o mobile/dumb-agent.o \
 	common/bi-connector.o common/node.o \
 	common/mobilenode.o \
diff --git a/mac/wireless-phy.cc b/mac/wireless-phy.cc
index 0790909..b76965b 100644
--- a/mac/wireless-phy.cc
+++ b/mac/wireless-phy.cc
@@ -47,6 +47,7 @@
 #include <propagation.h>
 #include <modulation.h>
 #include <omni-antenna.h>
+#include <dir-antenna.h>
 #include <wireless-phy.h>
 #include <packet.h>
 #include <ip.h>
@@ -188,6 +189,9 @@ WirelessPhy::command(int argc, const char*const* argv)
 			assert(propagation_ == 0);
 			propagation_ = (Propagation*) obj;
 			return TCL_OK;
+		} else if (strcasecmp(argv[1], "dir-antenna") == 0) {
+			ant_ = (DirAntenna*) obj;
+			return TCL_OK;
 		} else if (strcasecmp(argv[1], "antenna") == 0) {
 			ant_ = (Antenna*) obj;
 			return TCL_OK;
diff --git a/mobile/antenna.txt b/mobile/antenna.txt
new file mode 100644
index 0000000..1185446
--- /dev/null
+++ b/mobile/antenna.txt
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+5	322	-0.25
+5	323	-0.125
+5	324	0
+5	325	0
+5	326	0
+5	327	0
+5	328	0
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+5	359	0
diff --git a/mobile/antenna1.txt b/mobile/antenna1.txt
new file mode 100644
index 0000000..42004d3
--- /dev/null
+++ b/mobile/antenna1.txt
@@ -0,0 +1,360 @@
+1	0	24
+1	1	23.5
+1	2	23
+1	3	22.5
+1	4	22
+1	5	21
+1	6	18.7
+1	7	16.4
+1	8	14
+1	9	9
+1	10	4
+1	11	2
+1	12	0
+1	13	-2
+1	14	-4
+1	15	-6
+1	16	-10
+1	17	-14
+1	18	-18
+1	19	-22
+1	20	-26
+1	21	-23.6
+1	22	-21.2
+1	23	-18.8
+1	24	-16.4
+1	25	-14
+1	26	-11.6
+1	27	-9.2
+1	28	-6.8
+1	29	-4.4
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+1	38	-8.8
+1	39	-6.4
+1	40	-4
+1	41	-4.7
+1	42	-5.4
+1	43	-6.1
+1	44	-6.8
+1	45	-7.5
+1	46	-8.2
+1	47	-8.9
+1	48	-9.6
+1	49	-10.3
+1	50	-11
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+1	85	0
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+1	194	-32.85
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+1	208	-27.95
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+1	256	-11.15
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+1	258	-10.45
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+1	356	22
+1	357	22.5
+1	358	23
+1	359	23.5
diff --git a/mobile/dir-antenna.cc b/mobile/dir-antenna.cc
new file mode 100644
index 0000000..4361ca5
--- /dev/null
+++ b/mobile/dir-antenna.cc
@@ -0,0 +1,312 @@
+
+/* -*-	Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
+/*
+ * Developed by:- Ankur Khandelwal : Siddhartha Saha : Ashwini Kumar : Sabyasachi Roy @ IIT-Kanpur
+ *
+ * dir-antenna.cc
+   $Id: dir-antenna.cc,v 1.4 2005/02/07 15:10:05 bhaskar Exp $
+   */
+
+#include <dir-antenna.h>
+#include <math.h>
+
+
+static class DirAntennaClass : public TclClass {
+public:
+  DirAntennaClass() : TclClass("Antenna/DirAntenna") {}
+  TclObject* create(int, const char*const*) {
+    return (new DirAntenna);
+  }
+	
+} class_DirAntenna;
+
+/* BEGIN<Sabya,Ashwini> */
+
+double DirAntenna::getRxGain(double x, double y, double z, double lambda)
+  // return the gain for a signal from a node at vector dX, dY, dZ
+  // from the receiver at wavelength lambda
+{
+ 
+/*=======================================================================================
+ */
+	/*
+	 * For now, just return 1.0 if the ray (x,y) falls on the cone defined by
+	 * (angle, angle+width), zero otherwise
+	 */
+double angle;
+double dist_ = sqrt(x*x+y*y+z*z);
+if(dist_==0.0)
+{
+	return 1.0;
+}	
+angle = atan2(y,x);
+/* angle is angle from -PI to +PI, inclusive, in radian,
+ * convert to degrees
+ */
+angle = angle*180/M_PI;
+/* Bring it to 0-360 range */
+if(angle < 0) angle += 360;
+if(Type_ == 0)
+{		
+	/* Now to see if it lies inside the cone :
+	 */
+	Gr_ = 0.0;
+	if(upperAngle > lowerAngle){
+		/* Normal case*/
+		if(angle >= lowerAngle && angle <= upperAngle) Gr_ = 1.0;
+	}else if(upperAngle < lowerAngle){
+		/* Like lowerAngle = 350 and upper angle = 10 */
+		if(angle >= lowerAngle || angle <= upperAngle) Gr_ = 1.0;
+	}else{
+		/* both are equal, => 360 width */
+		Gr_ = 1.0;
+	}
+	/* A wild hack, multiply the gain with the ratio of the solid angles */
+	
+	return Gr_*solidAngleRatio;
+}
+else
+{
+	double diff_angle;
+	diff_angle = angle - lowerAngle;
+	if(diff_angle < 0)
+	{
+		while(diff_angle < 0)
+			diff_angle = diff_angle + 360;
+	}
+	if(diff_angle >= 360)
+	{
+		while(diff_angle > 360)
+			diff_angle = diff_angle - 360;
+	}
+	double gain;
+	gain = (gainVals[((int)diff_angle)%360] + gainVals[(((int)diff_angle)+1)%360])/2.0;
+	//	fprintf(stderr,"RX Gain %f %f\n",diff_angle,gainVals[((int)diff_angle)%360]);
+	return (pow(10.0,gain/10));
+
+}	
+}
+
+
+double DirAntenna::getTxGain(double x, double y, double z, double lambda)
+  // return the gain for a signal to a node at vector dX, dY, dZ
+  // from the transmitter at wavelength lambda
+{
+
+/*=======================================================================================
+ */
+	/*
+	 * For now, just return 1.0 if the ray (x,y) falls on the cone defined by
+	 * (angle, angle+width), zero otherwise
+	 */
+	
+double angle;
+double dist_ = sqrt(x*x+y*y+z*z);
+if(dist_==0.0)
+{
+	return 1.0;
+}	
+angle = atan2(y,x);
+/* angle is angle from -PI to +PI, inclusive, in radian,
+ * convert to degrees
+ */
+angle = angle*180/M_PI;
+/* Bring it to 0-360 range */
+if(angle < 0) angle += 360;
+
+if(Type_ == 0)
+{	
+	
+
+	/* Now to see if it lies inside the cone :
+	 */
+	Gt_ = 0.0;
+	if(upperAngle > lowerAngle){
+		/* Normal case*/
+		if(angle >= lowerAngle && angle <= upperAngle) Gt_ = 1.0;
+	}else if(upperAngle < lowerAngle){
+		/* Like lowerAngle = 350 and upper angle = 10 */
+		if(angle >= lowerAngle || angle <= upperAngle) Gt_ = 1.0;
+	}else{
+		/* both are equal, => 360 width */
+		Gt_ = 1.0;
+	}
+	/* A wild hack, multiply the gain with the ratio of the solid angles */
+
+	
+	return Gt_*solidAngleRatio;
+}	
+else
+{
+	double diff_angle;
+	diff_angle = angle - lowerAngle;
+	if(diff_angle < 0)
+	{
+		while(diff_angle < 0)
+			diff_angle = diff_angle + 360;
+	}
+	if(diff_angle >= 360)
+	{
+		while(diff_angle > 360)
+			diff_angle = diff_angle - 360;
+	}
+	double gain;
+	gain = (gainVals[((int)diff_angle)%360] + gainVals[(((int)diff_angle)+1)%360])/2.0;
+	return (pow(10.0,gain/10));
+}
+}
+
+/* END<Sabya,Ashwini> */
+
+DirAntenna::DirAntenna()
+{
+ 
+	 char *antn;
+	 char *token;
+	 int i=0;
+	 Gt_ = 1.0;
+	 Gr_ = 1.0;
+	 Angle_ = 0;
+	 bind("Gt_", &Gt_);
+	 bind("Gr_", &Gr_);
+	 bind("Angle_",&Angle_);
+	 bind("Width_",&Width_);
+	
+	 /* BEGIN<Sabya,Ashwini> */
+
+	 bind("Type_",&Type_);
+	 
+	 /* END<Sabya,Ashwini> */
+
+	 /* calculate lower and upper angle */
+	 lowerAngle = Angle_;
+	 while(lowerAngle < 0){
+		 lowerAngle += 360;
+	 }
+	 upperAngle = lowerAngle + Width_;
+	 while(upperAngle < 0){
+		 upperAngle += 360;
+	 }
+	 
+	 upperAngle %= 360;
+	 lowerAngle %= 360;
+	 solidAngleRatio = 2/(1 - cos(M_PI*Width_/360));
+	 
+	 /* BEGIN<Sabya,Ashwini> */
+
+	 // Checking for the antenna type given
+	 if (Type_ > 8 || Type_ < 0)
+	 {
+		 printf("Invalid antenna type given..should be between 0 & 8;\n");
+		 exit(1);
+	 }
+	 if(Type_ != 0)
+		 initialize_radiation_pattern();
+
+	 /* END<Sabya,Ashwini> */
+
+	 
+	 
+}
+
+int DirAntenna::command(int argc, const char*const* argv)
+{
+	TclObject *obj; 
+
+	if(argc == 3) {
+		if (strcasecmp(argv[1], "setAngle") == 0) {
+			Angle_ = atoi(argv[2]);
+			setSAR();
+			return TCL_OK;
+		}
+		if (strcasecmp(argv[1], "setWidth") == 0) {
+			Width_ = atoi(argv[2]);
+			setSAR();
+			return TCL_OK;
+		}
+		
+		/* BEGIN<Sabya,Ashwini> */
+
+		if(strcasecmp(argv[1], "setType") == 0) {
+			Type_ = atoi(argv[2]);
+			if(Type_ > 8 || Type_ < 0)
+			{	
+				printf("Erroneous Type Input\n");
+				exit(0);
+			}	
+			if(Type_ != 0)
+				initialize_radiation_pattern();
+			return TCL_OK;
+		}
+		/* END<Sabya,Ashwini> */
+
+		if (strcasecmp(argv[1], "setX") == 0) {
+			X_ = atof(argv[2]);
+			return TCL_OK;
+		}
+		if (strcasecmp(argv[1], "setY") == 0) {
+			Y_ = atof(argv[2]);
+			return TCL_OK;
+		}
+		if (strcasecmp(argv[1], "setZ") == 0) {
+			Z_ = atof(argv[2]);
+			return TCL_OK;
+		}
+	}
+	return Antenna::command(argc,argv);
+}
+
+void DirAntenna::setSAR()
+{
+	//printf(" the current value of antenna parameters:\n");
+	//printf("------------------------------------------\n");
+	//printf("angle=%d, width=%d, solidangle=%f lower=%d upper=%d\n",getangle(),getwidth(),getSAR(),getLA(),getUA());
+	lowerAngle = Angle_;
+	 while(lowerAngle < 0){
+		 lowerAngle += 360;
+	 }
+	 upperAngle = lowerAngle + Width_;
+	 while(upperAngle < 0){
+		 upperAngle += 360;
+	 }
+	 
+	 upperAngle %= 360;
+	 lowerAngle %= 360;
+	 solidAngleRatio = 2/(1 - cos(M_PI*Width_/360));
+	 
+}
+
+/* BEGIN<Sabya,Ashwini> */
+
+void DirAntenna::initialize_radiation_pattern()
+{
+	FILE *fp;
+	char *radiation_file;
+	//radiation_file = (char *)malloc(256);
+	radiation_file = getenv("NS_ANTENNA_FILE");
+	if(radiation_file == NULL) {
+		fprintf(stderr, "Env variable NS_ANTENNA_FILE has to be set, see documentation (?)\n");
+		exit(65);
+	}
+	fp = fopen(radiation_file,"r");
+	if(fp == NULL) {
+		perror("fopen");
+		fprintf(stderr, "Can't open %s\n", radiation_file);
+		exit(34);
+	}
+	char str[1024];
+	int type;
+	int angle;
+	float gain;
+	
+	while(!feof(fp)){
+		fgets(str,1024,fp);
+		sscanf(str,"%d%d%f",&type,&angle,&gain);
+		if(type+1 == Type_){
+			gainVals[angle] = gain;
+		}
+	}
+}	
+
+/* END<Sabya,Ashwini> */
+
diff --git a/mobile/dir-antenna.h b/mobile/dir-antenna.h
new file mode 100644
index 0000000..2bcafff
--- /dev/null
+++ b/mobile/dir-antenna.h
@@ -0,0 +1,75 @@
+/* -*-	Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
+/*
+ * Developed by: Ankur Khandelwal, Siddhartha Saha, Ashwini Kumar, Sabyasachi Roy @ IIT-Kanpur
+ *
+ */
+/* omni-antenna.h
+   omni-directional antenna
+*/
+
+#ifndef ns_dirantenna_h
+#define ns_dirantenna_h
+
+#include <antenna.h>
+
+class DirAntenna : public Antenna {
+
+public:
+  DirAntenna();
+  
+	virtual double getTxGain(double, double, double, double);
+	virtual double getRxGain(double, double, double, double);
+  
+        virtual Antenna * copy()
+	// return a pointer to a copy of this antenna that will return the 
+	// same thing for get{Rx,Tx}Gain that this one would at this point
+	// in time.  This is needed b/c if a pkt is sent with a directable
+	// antenna, this antenna may be have been redirected by the time we
+	// call getTxGain on the copy to determine if the pkt is received.
+        {
+            // since the Gt and Gr are constant w.r.t time, we can just return
+            // this object itself
+            return this;
+        }
+
+        virtual void release()
+        // release a copy created by copy() above
+        {
+                  // don't do anything
+        }
+
+/* BEGIN<Sabya,Ashwini> */
+	
+ virtual int command(int argc, const char*const* argv);
+ int getangle(){ return Angle_;}
+ int getwidth(){ return Width_;}
+ int getLA(){ return lowerAngle;}
+ int getUA(){ return upperAngle;}
+ double getSAR(){ return solidAngleRatio;}
+ void setSAR();
+ void initialize_radiation_pattern();
+
+/* END<Sabya,Ashwini> */ 
+
+protected:
+	double Gt_;		       // gain of transmitter (db)
+	double Gr_;		       // gain of receiver (db)
+	int Angle_;                    // orientation of the antenna (from the positive X-axis) (degrees) 
+	int Width_;                    // this is the width of the dir-antenna, basically, the angular range to which it can transfer.
+
+/* BEGIN<Sabya,Ashwini> */
+	
+	int Type_;		       // Specifying the "type" of directional antenna to use. Type 0 implies the width should also be specified 
+	
+	float gainVals[360];  // Stores the gain values for this antenna
+
+	/* END<Sabya,Ashwini> */ 
+private:
+	int lowerAngle;
+	int upperAngle;
+	double solidAngleRatio;
+
+};
+
+
+#endif // ns_dirantenna_h
diff --git a/tcl/lib/ns-default.tcl b/tcl/lib/ns-default.tcl
index 470e2a8..c28344f 100644
--- a/tcl/lib/ns-default.tcl
+++ b/tcl/lib/ns-default.tcl
@@ -750,6 +750,21 @@ Antenna/OmniAntenna set Z_ 1.5
 Antenna/OmniAntenna set Gt_ 1.0
 Antenna/OmniAntenna set Gr_ 1.0
 
+#
+# Unity gain, directional antennas
+# Set up the antennas to be centered in the node and 1.5 meters above it
+Antenna/DirAntenna set X_ 0
+Antenna/DirAntenna set Y_ 0
+Antenna/DirAntenna set Z_ 1.5
+Antenna/DirAntenna set Gt_ 1.0
+Antenna/DirAntenna set Gr_ 1.0
+Antenna/DirAntenna set Angle_ 0
+Antenna/DirAntenna set Width_ 360
+
+#sroy+ash
+Antenna/DirAntenna set Type_ 0
+#sroy+ash
+
 Phy set debug_ false
 
 # Initialize the SharedMedia interface with parameters to make