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|
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** Antenna Visualization Toolkit **/
/** **/
/** Copyright (C) 1998 Adrian Agogino, Ken Harker **/
/** Copyright (C) 2005 Joop Stakenborg **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <assert.h>
#include <stddef.h>
#include <math.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "MyTypes.h"
#include "TkAntenna.h"
#include "togl.h"
#include "ant.h"
#include "pcard.h"
#include "VisField.h"
#include "VisWires.h"
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** Global Variables **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
double SCALE_FACTOR; /** Scale factor for antenna **/
double DEFAULT_BOOMHEIGHT; /** In case no ground specd **/
double POINT_DIST_SCALE; /** For point clouds, in dBi **/
double POINT_SIZE_SCALE; /** ..also in terms of dBi **/
double STEP_SIZE; /** Degrees between control points **/
double NULL_THRESHOLD; /** As a percentage of max dBi **/
double NULL_DISTANCE; /** So null maps float above **/
double ALPHA; /** Alpha transparency factor **/
double TUBE_WIDTH_SCALE=2; /** Tube width scale **/
double curr_step_size; /** Updated when the NEC called **/
int WireDrawMode; /** Mode to draw the wires in **/
int MultipleAntMode; /** Current antenna or all in phase **/
int ShowRadPat; /** Show radiation pattern? **/
int ShowPolSense; /** Show polarization sense? **/
int ShowPolTilt; /** Show polarization tilt? **/
int ShowAxialRatio; /** Show axial ratios? **/
int ShowNulls; /** Show nulls in pattern? **/
int DrawMode = 0; /** Mode to draw output in **/
int FreqSteps; /** Frequency steps **/
AntArray TheAnts; /** The antennas' geometries **/
bool FieldDataComputed = false; /** Do we need to compute field? **/
bool RFPowerDensityOn = false; /** Draw RF Power Density? **/
bool AntennasInScene = false; /** Are there antennas yet? **/
Point Center; /** Center of scene **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** Function Prototypes **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void TKA_Cylinder(GLfloat radius, GLfloat height, GLint slices, GLint rings);
void TKA_Cube(GLfloat size);
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** DrawAxes **/
/** **/
/** Debugging function. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void DrawAxes() {
GLfloat fcolor[4]; /** Color **/
fcolor[0] = 1.0; fcolor[1] = 0.0; fcolor[2] = 0.0; fcolor[3] = 1.0;
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, fcolor);
glLineWidth(2.0);
glBegin(GL_LINES);
glVertex3f(0.0, 0.0, 0.0);
glVertex3f(1.0, 0.0, 0.0);
glEnd();
fcolor[0] = 0.0; fcolor[1] = 1.0; fcolor[2] = 0.0; fcolor[3] = 1.0;
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, fcolor);
glBegin(GL_LINES);
glVertex3f(0.0, 0.0, 0.0);
glVertex3f(0.0, 1.0, 0.0);
glEnd();
fcolor[0] = 0.0; fcolor[1] = 0.0; fcolor[2] = 1.0; fcolor[3] = 1.0;
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, fcolor);
glBegin(GL_LINES);
glVertex3f(0.0, 0.0, 0.0);
glVertex3f(0.0, 0.0, 1.0);
glEnd();
} /** End of DrawAxes **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** InsertTube **/
/** **/
/** Add an element to the antenna. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void InsertTubeR(Tube *root, Tube *the_tube) {
if(root == NULL)
return;
else if(root->next == NULL) {
root->next = (Tube*)malloc(sizeof(Tube));
*root->next = *the_tube;
root->next->next = NULL;
}
else
InsertTubeR(root->next, the_tube);
} /** End of InsertTubeR **/
void InsertTube(Ant *the_ant, Tube *the_tube) {
if(the_ant->first_tube == NULL) {
the_ant->first_tube = (Tube*)malloc(sizeof(Tube));
*the_ant->first_tube = *the_tube;
the_ant->first_tube->next = NULL;
} else
InsertTubeR(the_ant->first_tube, the_tube);
the_ant->tube_count++;
} /** End of InsertTube **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** SetPoint **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void SetPoint(Point *p, double x, double y, double z) {
p->x = x;
p->y = y;
p->z = z;
} /** End of SetPoint **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** Square double **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
double sqr(double x) {
return(x*x);
} /** End of sqr **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** PointDist **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
double PointDist(Point p1, Point p2) {
double result; /** Distance **/
result = (sqr(p2.x-p1.x) + sqr(p2.y-p1.y) + sqr(p2.z-p1.z));
return(sqrt(result));
} /** End of PointDist **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** ToggleDrawMode **/
/** **/
/** This is called by the Tk widget code and toggles the variable that **/
/** determines which mode to draw the antenna pattern in. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void ToggleDrawMode(int mode) {
DrawMode = mode;
} /** End of ToggleDrawMode **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** ChangeFrequency **/
/** **/
/** This changes the frequency in MHz that the selected antenna gets **/
/** computed at by the NEC code. This should be a positive value. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void ChangeFrequency(double MHz) {
if (MHz < 0)
TheAnts.ants[TheAnts.curr_ant].frequency = 0.0;
else
TheAnts.ants[TheAnts.curr_ant].frequency = MHz;
} /** End of ToggleDrawMode **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** InitDisplay **/
/** **/
/** An inelegant mechanism for initializing some globals. Oh well, what **/
/** can you do? **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void InitDisplay(void) {
static int here_before; /** Have we been here before **/
if(here_before == 0) {
if (AntennasInScene == false)
TheAnts.ant_count = 0;
curr_step_size = 5;
ShowRadPat = 0;
ShowPolSense = 1;
ShowPolTilt = 0;
ShowNulls = 0;
NULL_THRESHOLD = 0.85;
NULL_DISTANCE = 5.0;
here_before = 1;
SetPoint(&Center, 0, 0, 0);
} /** Thing we do once ever **/
} /** End of InitDisplay **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** DisplayField **/
/** **/
/** Displays the radiation field of the antenna. This is basically a **/
/** giant switch. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void DisplayField(Ant *antData) {
if(RFPowerDensityOn == true) {
glPushMatrix();
if (DrawMode == 0) {
if(ShowRadPat)
DrawRFPowerDensityPoints(antData);
if(ShowPolSense)
DrawPolarizationSensePoints(antData);
if(ShowPolTilt)
DrawPolarizationTiltPoints(antData);
if(ShowAxialRatio)
DrawAxialRatioPoints(antData);
if(ShowNulls)
DrawShowNullsPoints(antData);
} /** Points **/
else if (DrawMode == 1) {
if(ShowRadPat)
DrawRFPowerDensitySurface(antData);
if(ShowPolSense)
DrawPolarizationSenseSurface(antData);
if(ShowPolTilt)
DrawPolarizationTiltSurface(antData);
if(ShowAxialRatio)
DrawAxialRatioSurface(antData);
if(ShowNulls)
DrawShowNullsSurface(antData);
} /** Surface **/
else if (DrawMode == 2) {
if(ShowRadPat)
DrawRFPowerDensitySphere(antData);
if(ShowPolSense)
DrawPolarizationSenseSphere(antData);
if(ShowPolTilt)
DrawPolarizationTiltSphere(antData);
if(ShowAxialRatio)
DrawAxialRatioSphere(antData);
if(ShowNulls)
DrawShowNullsSphere(antData);
} /** Sphere **/
glPopMatrix();
} /** Draw Power Density **/
} /** End of DisplayField **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** DisplaySelectedAnt **/
/** **/
/** This will render the antenna on the screen with a boom and mast if **/
/** applicable. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void DisplaySelectedAnt(Ant *ant, GLint slices, GLint rings, bool selected) {
double boomlength; /** Length of the boom **/
double boomcenter=0; /** Distance to boom center **/
double boomheight=0; /** Height of boom above ground **/
double boomwidth; /** Width of boom **/
double boomshift; /** How far we need to center **/
GLfloat selected_color[4]; /** The selected color **/
if (selected == true)
selected_color[0] = 1.0;
else
selected_color[0] = 0.5;
selected_color[1] = 0.5;
selected_color[2] = 0.5;
selected_color[3] = 1.0;
glPushMatrix();
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, selected_color);
if (ant->tube_count != 0) { /** Display only with antenna **/
glScalef(ant->visual_scale, ant->visual_scale, ant->visual_scale);
glTranslatef(ant->dx, ant->dy, ant->dz);
/** Antenna support structure **/
if ((ant->type == YAGI) || (ant->type == QUAD) ||(ant->type == DIPOLE)) {
boomheight = GetBoomHeight(ant->first_tube);
} /** Determine boomheight **/
if (ant->type == ELEVATED_VERTICAL) {
boomheight = GetVerticalHeight(ant->first_tube);
} /** Determine boomheight **/
if (ant->ground_specified == false) {
if ((ant->type == YAGI) ||
(ant->type == QUAD) ||
(ant->type == DIPOLE) ||
(ant->type == ELEVATED_VERTICAL)) {
boomheight = DEFAULT_BOOMHEIGHT;
boomheight = boomheight / SCALE_FACTOR;
} /** Common gain antennas **/
if (ant->type == VERTICAL) {
boomheight = 0.0;
} /** Verticals **/
} else {
boomheight = boomheight / SCALE_FACTOR;
} /** Boomheight given **/
boomwidth = GetBoomWidth(ant->first_tube);
if ((ant->type == YAGI) ||
(ant->type == QUAD) ||
(ant->type == DIPOLE) ||
(ant->type == ELEVATED_VERTICAL)) {
glPushMatrix();
glRotatef(-90.0, 1.0 , 0.0, 0.0 );
if (boomheight != 0.0)
TKA_Cylinder(boomwidth * 1.5, boomheight, slices, rings);
glPopMatrix();
} /** Only for elevated antennas **/
/** Antenna Boom **/
boomlength = GetBoomLength(ant->first_tube);
boomlength = boomlength / SCALE_FACTOR;
boomshift = GetBoomShift(ant->first_tube);
boomshift = boomshift / SCALE_FACTOR;
boomcenter = (boomlength / 2.0) + boomshift;
if ((ant->type == YAGI) ||
(ant->type == QUAD)) {
glPushMatrix();
glTranslatef((boomlength / -2.0), boomheight , 0.0);
glRotatef(90.0, 0.0, 1.0, 0.0);
if (boomlength != 0.0)
TKA_Cylinder(boomwidth, boomlength, slices, rings);
glPopMatrix();
} /** Only for antennas with booms **/
} /** Draw only with antenna **/
/** Antenna elements **/
glPushMatrix();
if (ant->ground_specified == false) {
glTranslatef((boomcenter * -1.0), boomheight*1, 0.0);
} else {
glTranslatef((boomcenter * -1.0), boomheight*0, 0.0);
} /** Move into position **/
if (ant->fieldComputed == false) {
DrawTubeList(ant->first_tube, ant->current_tube, slices, rings);
} else {
if (WireDrawMode == 0) {
DrawTubeList(ant->first_tube, ant->current_tube, slices, rings);
} else if (WireDrawMode == 1) {
DrawWireCurrentMagnitudeList(ant->first_tube,
ant->current_tube,
ant->max_current_mag,
ant->min_current_mag,
slices,
rings);
} else if (WireDrawMode == 2) {
DrawWireCurrentPhaseList(ant->first_tube,
ant->current_tube,
ant->max_current_phase,
ant->min_current_phase,
slices,
rings);
/*
DrawTubeList(ant->first_tube, ant->current_tube, slices, rings);
*/
} /** How to draw wires **/
} /** Only if field computed **/
glPopMatrix();
/** Radiation field **/
glPushMatrix();
if ((ant->fieldComputed == true) && (MultipleAntMode == 0)) {
glTranslatef(0.0, boomheight, 0.0);
glScalef((1.0/ant->visual_scale),
(1.0/ant->visual_scale),
(1.0/ant->visual_scale));
DisplayField(ant);
} /** Only if field is computed **/
glPopMatrix();
glPopMatrix();
} /** End of DisplaySelectedAnt **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** DisplayAnt **/
/** **/
/** This should be DisplayAnts plural. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void DisplayAnt(GLint slices, GLint rings) {
double median_x=0; /** Median X value **/
double median_y=0; /** Median Y value **/
double median_z=0; /** Median Z value **/
double boomheight=0;/** Height of boom above ground **/
int i; /** Loop counter **/
int j; /** Loop counter **/
InitDisplay();
if (MultipleAntMode == 1) {
/** Antenna support structure **/
if ((TheAnts.ants[TheAnts.curr_ant].type == YAGI) ||
(TheAnts.ants[TheAnts.curr_ant].type == QUAD) ||
(TheAnts.ants[TheAnts.curr_ant].type == DIPOLE)) {
boomheight = GetBoomHeight(TheAnts.ants[TheAnts.curr_ant].first_tube);
} /** Determine boomheight **/
if (TheAnts.ants[TheAnts.curr_ant].type == ELEVATED_VERTICAL) {
boomheight=GetVerticalHeight(TheAnts.ants[TheAnts.curr_ant].first_tube);
} /** Determine boomheight **/
if (TheAnts.ants[TheAnts.curr_ant].ground_specified == false) {
if ((TheAnts.ants[TheAnts.curr_ant].type == YAGI) ||
(TheAnts.ants[TheAnts.curr_ant].type == QUAD) ||
(TheAnts.ants[TheAnts.curr_ant].type == DIPOLE) ||
(TheAnts.ants[TheAnts.curr_ant].type == ELEVATED_VERTICAL)) {
boomheight = DEFAULT_BOOMHEIGHT;
boomheight = boomheight / SCALE_FACTOR;
} /** Common gain antennas **/
if (TheAnts.ants[TheAnts.curr_ant].type == VERTICAL) {
boomheight = 0.0;
} /** Verticals **/
} else {
boomheight = boomheight / SCALE_FACTOR;
} /** Boomheight given **/
median_x = 0.0;
median_y = 0.0;
median_z = 0.0;
for (j=0;j<TheAnts.ant_count;j++) {
median_x = median_x + TheAnts.ants[j].dx;
median_y = median_y + TheAnts.ants[j].dy;
median_z = median_z + TheAnts.ants[j].dz;
} /** For each antenna **/
if (median_x != 0.0)
median_x = median_x / TheAnts.ant_count;
if (median_y != 0.0)
median_y = median_y / TheAnts.ant_count;
if (median_z != 0.0)
median_z = median_z / TheAnts.ant_count;
median_y = median_y + boomheight;
} /** Display field in center of all antennas **/
for(i=0; i < TheAnts.ant_count; i++) {
if (i == TheAnts.curr_ant) {
DisplaySelectedAnt(&TheAnts.ants[i], slices, rings, true);
} else {
DisplaySelectedAnt(&TheAnts.ants[i], slices, rings, false);
} /** Normal antenna **/
} /** For each antenna **/
/** Radiation field **/
glPushMatrix();
if (MultipleAntMode == 1) {
glTranslatef(median_x, median_y, median_z);
glScalef((1.0/TheAnts.ants[TheAnts.curr_ant].visual_scale),
(1.0/TheAnts.ants[TheAnts.curr_ant].visual_scale),
(1.0/TheAnts.ants[TheAnts.curr_ant].visual_scale));
DisplayField(&TheAnts.ants[TheAnts.curr_ant]);
} /** Only if field is computed **/
glPopMatrix();
} /** End of DisplayAnt **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** InitAnt **/
/** **/
/** An inelegant mechanism for intializing some variables in the antenna **/
/** data structure. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void InitAnt(Ant *ant) {
ant->first_tube = NULL;
ant->tube_count = 0;
ant->fieldData = NULL;
ant->dx = 0.0;
ant->dy = 0.0;
ant->dz = 0.0;
} /** End of InitAnt **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** ReadFile **/
/** **/
/** This is the callback function that loads an antenna into memory. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void ReadFile(CONST84 char *file_name) {
if (AntennasInScene == false) {
TheAnts.ant_count = 0;
AntennasInScene = true;
} /** Initialize antenna count **/
TheAnts.ant_count++;
ChangeCurrentAnt(1);
InitAnt(&TheAnts.ants[TheAnts.curr_ant]);
TheAnts.ants[TheAnts.curr_ant].tube_count = 0;
TheAnts.ants[TheAnts.curr_ant].fieldComputed = false;
ReadCardFile(file_name, &TheAnts.ants[TheAnts.curr_ant]);
RFPowerDensityOn = false;
TheAnts.ants[TheAnts.curr_ant].current_tube =
TheAnts.ants[TheAnts.curr_ant].first_tube;
} /** End of ReadFile **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** DeleteCurrentAnt **/
/** **/
/** There may be a memory leak here. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void DeleteCurrentAnt(void) {
int i; /** Array index **/
for(i = TheAnts.curr_ant; i < TheAnts.ant_count-1; i++) {
TheAnts.ants[i] = TheAnts.ants[i+1];
} /** Locate current antenna **/
if(TheAnts.ant_count > 0)
TheAnts.ant_count--;
if(TheAnts.curr_ant >= TheAnts.ant_count)
TheAnts.curr_ant--;
} /** End of DeleteCurrentTube **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** MoveCurrentAnt **/
/** **/
/** Moves the current antenna position. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void MoveCurrentAnt(double dx, double dy, double dz) {
if(TheAnts.ants[TheAnts.curr_ant].current_tube != NULL) {
TheAnts.ants[TheAnts.curr_ant].dx += dx;
TheAnts.ants[TheAnts.curr_ant].dy += dy;
TheAnts.ants[TheAnts.curr_ant].dz += dz;
} /** While more elements **/
} /** End of MoveCurrentAnt **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** MoveCurrentTube **/
/** **/
/** Moves the current antenna element. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void MoveCurrentTube(double dx, double dy, double dz) {
Tube *current; /** Current tube **/
if(TheAnts.ants[TheAnts.curr_ant].current_tube != NULL) {
current = TheAnts.ants[TheAnts.curr_ant].current_tube;
if (current->type == IS_TUBE) {
TheAnts.ants[TheAnts.curr_ant].current_tube->e1.x += dx;
TheAnts.ants[TheAnts.curr_ant].current_tube->e1.y += dy;
TheAnts.ants[TheAnts.curr_ant].current_tube->e1.z += dz;
TheAnts.ants[TheAnts.curr_ant].current_tube->e2.x += dx;
TheAnts.ants[TheAnts.curr_ant].current_tube->e2.y += dy;
TheAnts.ants[TheAnts.curr_ant].current_tube->e2.z += dz;
} /** Only for elements **/
} /** While more elements **/
} /** End of MoveCurrentTube **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** MoveCurrentWall **/
/** **/
/** Moves the current wall. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void MoveCurrentWall(double dx, double dy, double dz) {
Tube *current; /** Current tube **/
if(TheAnts.ants[TheAnts.curr_ant].current_tube != NULL) {
current = TheAnts.ants[TheAnts.curr_ant].current_tube;
if (current->type == IS_WALL) {
TheAnts.ants[TheAnts.curr_ant].current_tube->e1.x += dx;
TheAnts.ants[TheAnts.curr_ant].current_tube->e1.y += dy;
TheAnts.ants[TheAnts.curr_ant].current_tube->e1.z += dz;
TheAnts.ants[TheAnts.curr_ant].current_tube->e2.x += dx;
TheAnts.ants[TheAnts.curr_ant].current_tube->e2.y += dy;
TheAnts.ants[TheAnts.curr_ant].current_tube->e2.z += dz;
} /** Only for walls **/
} /** While more elements **/
} /** End of MoveCurrentWall **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** MoveCenter **/
/** **/
/** Moves the viewing center. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void TransformPoint(Point *old_point, double azimuth, double elevation,
double dist, Point *new_point)
{
Point save_old;
save_old = *old_point;
new_point->y = -dist*sin(elevation/57.3);
new_point->z = dist*cos(elevation/57.3);
new_point->x = new_point->z*sin(azimuth/57.3);
new_point->z = new_point->z*cos(azimuth/57.3);
/* new_point->x = dist*sin(azimuth/57.3);
new_point->z = dist*cos(azimuth/57.3);
new_point->y = -new_point->z*sin(elevation/57.3);
new_point->z = new_point->z*cos(elevation/57.3);*/
new_point->x += save_old.x;
new_point->y += save_old.y;
new_point->z += save_old.z;
}/*TransformPoint*/
void DoMoveCenter(double x, double y, double azimuth, double elevation,
double dist) {
TransformPoint(&Center, -azimuth - 90, 0, -x/35.0, &Center);
TransformPoint(&Center, -azimuth, -elevation -90, -y/35.0, &Center);
/*Center.x += x;
Center.y += y; */
}
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** RotateCurrentTube **/
/** **/
/** Causes the current antenna element to rotate about its center. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void RotateCurrentTube(double rx, double ry, double rz) {
Point e1; /** Left endpoint **/
Point e2; /** Right endpoint **/
Point center; /** Pivot point **/
double x; /** Computed value **/
double y; /** Computed value **/
if(TheAnts.ants[TheAnts.curr_ant].current_tube != NULL) {
if(TheAnts.ants[TheAnts.curr_ant].current_tube->type == IS_TUBE) {
e1 = TheAnts.ants[TheAnts.curr_ant].current_tube->e1;
e2 = TheAnts.ants[TheAnts.curr_ant].current_tube->e2;
center.x = (e1.x + e2.x)/2;
center.y = (e1.y + e2.y)/2;
center.z = (e1.z + e2.z)/2;
e1.x -= center.x;
e1.y -= center.y;
e1.z -= center.z;
e2.x -= center.x;
e2.y -= center.y;
e2.z -= center.z;
y = e1.y*cos(rx/57.3) - e1.z*sin(rx/57.3);
e1.z = e1.y*sin(rx/57.3) + e1.z*cos(rx/57.3);
e1.y = y;
y = e2.y*cos(rx/57.3) - e2.z*sin(rx/57.3);
e2.z = e2.y*sin(rx/57.3) + e2.z*cos(rx/57.3);
e2.y = y;
x = e1.x*cos(ry/57.3) + e1.z*sin(ry/57.3);
e1.z = -e1.x*sin(ry/57.3) + e1.z*cos(ry/57.3);
e1.x = x;
x = e2.x*cos(ry/57.3) + e2.z*sin(ry/57.3);
e2.z = -e2.x*sin(ry/57.3) + e2.z*cos(ry/57.3);
e2.x = x;
x = e1.x*cos(rz/57.3) - e1.y*sin(rz/57.3);
e1.y = e1.x*sin(rz/57.3) + e1.y*cos(rz/57.3);
e1.x = x;
x = e2.x*cos(rz/57.3) - e2.y*sin(rz/57.3);
e2.y = e2.x*sin(rz/57.3) + e2.y*cos(rz/57.3);
e2.x = x;
e1.x += center.x;
e1.y += center.y;
e1.z += center.z;
e2.x += center.x;
e2.y += center.y;
e2.z += center.z;
TheAnts.ants[TheAnts.curr_ant].current_tube->e1 = e1;
TheAnts.ants[TheAnts.curr_ant].current_tube->e2 = e2;
} /** Only for elements **/
} /** While more elements **/
} /** End of RotateCurrentTube **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** RotateCurrentAntenna **/
/** **/
/** Causes the current antenna to rotate about its mast. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void RotateCurrentAntenna(double rx, double ry, double rz) {
Point e1; /** Left endpoint **/
Point e2; /** Right endpoint **/
Point center; /** Pivot point **/
double x; /** Computed value **/
double y; /** Computed value **/
if(TheAnts.ants[TheAnts.curr_ant].current_tube != NULL) {
e1 = TheAnts.ants[TheAnts.curr_ant].current_tube->e1;
e2 = TheAnts.ants[TheAnts.curr_ant].current_tube->e2;
center.x = (e1.x + e2.x)/2;
center.y = (e1.y + e2.y)/2;
center.z = (e1.z + e2.z)/2;
e1.x -= center.x;
e1.y -= center.y;
e1.z -= center.z;
e2.x -= center.x;
e2.y -= center.y;
e2.z -= center.z;
y = e1.y*cos(rx/57.3) - e1.z*sin(rx/57.3);
e1.z = e1.y*sin(rx/57.3) + e1.z*cos(rx/57.3);
e1.y = y;
y = e2.y*cos(rx/57.3) - e2.z*sin(rx/57.3);
e2.z = e2.y*sin(rx/57.3) + e2.z*cos(rx/57.3);
e2.y = y;
x = e1.x*cos(ry/57.3) + e1.z*sin(ry/57.3);
e1.z = -e1.x*sin(ry/57.3) + e1.z*cos(ry/57.3);
e1.x = x;
x = e2.x*cos(ry/57.3) + e2.z*sin(ry/57.3);
e2.z = -e2.x*sin(ry/57.3) + e2.z*cos(ry/57.3);
e2.x = x;
x = e1.x*cos(rz/57.3) - e1.y*sin(rz/57.3);
e1.y = e1.x*sin(rz/57.3) + e1.y*cos(rz/57.3);
e1.x = x;
x = e2.x*cos(rz/57.3) - e2.y*sin(rz/57.3);
e2.y = e2.x*sin(rz/57.3) + e2.y*cos(rz/57.3);
e2.x = x;
e1.x += center.x;
e1.y += center.y;
e1.z += center.z;
e2.x += center.x;
e2.y += center.y;
e2.z += center.z;
TheAnts.ants[TheAnts.curr_ant].current_tube->e1 = e1;
TheAnts.ants[TheAnts.curr_ant].current_tube->e2 = e2;
} /** While more elements **/
} /** End of RotateCurrentAntenna **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** ScaleCurrentWall **/
/** **/
/** Changes the size of the obstruction. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void ScaleCurrentWall(double sx, double sy, double sz) {
Tube *current; /** The element **/
current = TheAnts.ants[TheAnts.curr_ant].current_tube;
if (current->type == IS_WALL) {
TheAnts.ants[TheAnts.curr_ant].current_tube->e2.x += sx;
TheAnts.ants[TheAnts.curr_ant].current_tube->e2.y += sy;
TheAnts.ants[TheAnts.curr_ant].current_tube->e2.z += sz;
} /** Only affect walls **/
} /** End of ScaleCurrentWall **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** ScaleCurrentTube **/
/** **/
/** Changes the physical length and diameter of the current antenna **/
/** element. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void ScaleCurrentTube(double scale, double width) {
double cx; /** Point c value X **/
double cy; /** Point c value Y **/
double cz; /** Point c value Z **/
double dx; /** Point d value X **/
double dy; /** Point d value Y **/
double dz; /** Point d value Z **/
Tube *current; /** The element **/
Ant TheAnt; /** The antenna **/
current = TheAnts.ants[TheAnts.curr_ant].current_tube;
if (current->type == IS_TUBE) {
TheAnt = TheAnts.ants[TheAnts.curr_ant];
if(TheAnt.current_tube != NULL) {
cx = (TheAnt.current_tube->e2.x + TheAnt.current_tube->e1.x) / 2.0;
cy = (TheAnt.current_tube->e2.y + TheAnt.current_tube->e1.y) / 2.0;
cz = (TheAnt.current_tube->e2.z + TheAnt.current_tube->e1.z) / 2.0;
dx = TheAnt.current_tube->e1.x - cx;
dy = TheAnt.current_tube->e1.y - cy;
dz = TheAnt.current_tube->e1.z - cz;
if((dx*dx + dy*dy + dz*dz > 0.01) || (scale > 0)) {
TheAnt.current_tube->e1.x = cx + dx*(1 + scale);
TheAnt.current_tube->e1.y = cy + dy*(1 + scale);
TheAnt.current_tube->e1.z = cz + dz*(1 + scale);
TheAnt.current_tube->e2.x = cx - dx*(1 + scale);
TheAnt.current_tube->e2.y = cy - dy*(1 + scale);
TheAnt.current_tube->e2.z = cz - dz*(1 + scale);
} /** Assuming things are visible at all **/
TheAnt.current_tube->width *= (width + 1);
if(TheAnt.current_tube->width < 0.001)
TheAnt.current_tube->width = 0.001;
} /** While there are still elements **/
} /** Only if it's not a wall **/
} /** End of MoveCurrentTube **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** ChangeCurrentAnt **/
/** **/
/** Causes the next antenna in the scene to be selected. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void ChangeCurrentAnt(int count) {
if(TheAnts.ant_count != 0) {
TheAnts.curr_ant++;
if(TheAnts.curr_ant >= TheAnts.ant_count)
TheAnts.curr_ant = 0;
} /** Increment current pointer **/
} /** End of ChangeCurrentAnt **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** ChangeCurrentTube **/
/** **/
/** Causes the next element in the antenna to be selected. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void ChangeCurrentTube(int count) {
Ant TheAnt; /** Temporary storage **/
TheAnt = TheAnts.ants[TheAnts.curr_ant];
while(count > 0) {
if(TheAnt.current_tube == NULL)
TheAnt.current_tube = TheAnt.first_tube;
else {
TheAnt.current_tube = TheAnt.current_tube->next;
if(TheAnt.current_tube == NULL)
TheAnt.current_tube = TheAnt.first_tube;
} /** While still elements **/
count--;
} /** Traverse element list **/
TheAnts.ants[TheAnts.curr_ant] = TheAnt;
} /** End of ChangeCurrentTube **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** GenerateNECFile **/
/** **/
/** This function traverses the details of the antenna we have stored in **/
/** memory and output a .nec file that NEC2 will load by default. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void GenerateNECFile(CONST84 char *file_name) {
curr_step_size = STEP_SIZE;
if (MultipleAntMode == 0) {
WriteCardFile(file_name,
&TheAnts.ants[TheAnts.curr_ant],
STEP_SIZE,
TheAnts.ants[TheAnts.curr_ant].frequency);
} else if (MultipleAntMode == 1) {
WriteMultAntsFile(file_name,
STEP_SIZE,
TheAnts.ants[TheAnts.curr_ant].frequency);
} /** Single or all antennas **/
} /** End of GenerateNECFile **/
/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** AddWall **/
/** **/
/** The callback function for adding an obstruction into the scene. **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void AddWall(void) {
Tube a_tube; /** Wall element to be added **/
a_tube.width = 1;
a_tube.type = IS_WALL;
SetPoint(&a_tube.e1, -2, 0, 0);
SetPoint(&a_tube.e2, -1, 2, 4);
InsertTube(&TheAnts.ants[TheAnts.curr_ant], &a_tube);
} /** End of AddWall **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** ComputeField **/
/** **/
/** This function calls the NEC2 code to recompute the field of radiation **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
void ComputeField(bool changed) {
FILE *fin; /** Input file **/
long parentpid; /** Process ID of parent **/
long childpid; /** Process ID of child **/
int status; /** Status of child process **/
int ferror; /** File access error **/
/** Check to see if antennas exist **/
if (AntennasInScene == true) {
if ((TheAnts.ants[TheAnts.curr_ant].fieldComputed == false) ||
(changed == true)){
ferror = remove("output.nec");
ferror = remove("input.nec");
/** Output our current antenna to disk **/
GenerateNECFile("input.nec");
/** Run NEC code on that file **/
parentpid = getpid();
if ((childpid = fork()) < 0) {
fprintf(stderr,"Can't fork\n");
exit(-2);
} /** Error state **/
if (childpid == 0) { /** We are child **/
printf("Running NEC2 code... please stand by...\n");
execlp("nec2", "nec2", "input.nec", "output.nec", NULL);
exit(-1); /** We should never reach here **/
} /** We are child **/
else { /** We are parent **/
if (wait(&status) != childpid) {
fprintf(stderr,"Problem with child\n");
exit(-3);
} /** Error state **/
} /** We are parent **/
/** Read in results from disk **/
fin = fopen("output.nec", "rt");
if(fin != NULL) {
ParseFieldData(fin, &TheAnts.ants[TheAnts.curr_ant], true, true);
fclose(fin);
}
else {
fprintf(stderr, "Could Not Open File output.nec!!!\n");
return;
}
/*
ferror = remove("output.nec");
ferror = remove("input.nec");
*/
printf("Field computation complete.\n");
RFPowerDensityOn = true;
FieldDataComputed = true;
} /** Need to compute field **/
} /** Antennas are in scene **/
} /** End of ComputeField **/
/*****************************************************************************/
/*****************************************************************************/
/** **/
/** End of ant.c **/
/** **/
/*****************************************************************************/
/*****************************************************************************/
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