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glheatmap.c
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// glheatmap -- OpenGL-based interactive IPv4 heatmap
//
// Copyright (C) 2016 Verisign, Inc.
//
// This file is part of glheatmap.
//
// glheatmap 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.
//
// glheatmap 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with glheatmap If not, see <http://www.gnu.org/licenses/>.
//
// glheatmap utilizes software developed by third parties:
//
// * ipv4-heatmap, (C) 2007 The Measurement Factory, Inc [GPLv2]
//
//
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <math.h>
#include <netinet/in.h>
#include <assert.h>
#include <time.h>
#include <sys/time.h>
#include <err.h>
#include <ctype.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdarg.h>
#include <fcntl.h>
#include <sys/errno.h>
#include <pthread.h>
#if defined(__linux)
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>
#elif defined(__APPLE__)
#include <GLUT/glut.h>
#endif
#include "hue2rgb.h"
#include "bbox.h"
/*
* Compile-time options
*/
#define DATA_DOUBLES 1
/*
* Preprocessor macros
*/
#define bool int
#define NUM_DATA_COLORS 256
#define _32K 32768
#define _32KD 32768.0
#define _64K 65536
#ifndef MIN
#define MIN(a,b) (a<b?a:b)
#define MAX(a,b) (a>b?a:b)
#endif
typedef struct {
uint16_t a, b, c, d;
} dq;
/*
* Program Globals
*/
int DEBUG = 0;
/*
* Configurable Parameters
*/
static int MAPWIDTH = 1024;
static int MAPHEIGHT = 1024;
static int WINWIDTH = 1280;
static int WINHEIGHT = 786;
static bool OPT_FULLSCREEN = 0;
static bool OPT_AUTO_POINT_SIZE = 0;
static bool OPT_INPUT_UNTIMED = 0;
static const int ZOOM_STEPS = 20; // number of steps to double
static int ZOOM_INDEX = 20;
static unsigned int MASK_KEEP = 0xffffffff;
static unsigned int MASK_SET = 0;
static unsigned int OPT_BREAKPOINTS[100];
static unsigned int BREAKPOINT_IDX = 0;
/*
* Global Constants
*/
static const char *WHITESPACE = " \t\r\n";
/*
* Non-Config Globals
*/
static unsigned int NOW = 0;
static unsigned int TIMEBASE = 0;
static unsigned int DC_TIME = 0;
static unsigned int NQUERY = 0;
static unsigned int NPIX = 0;
static double ZOOM_BASE;
static GLfloat ZOOM_SCALE = 1.0;
static double QPS = 0;
static bool READING = 0;
static int STREAM = -1; /* network socket */
static double FILE_TIME;
static double FILE_TIME_OFFSET = 0; /* difference between file time and wall clock */
static double PLAYBACK_SPEED = 4.0;
static double DRAW_TIME = 0.0; /* how long drawData() takes */
static GLfloat POINT_SIZE = 0.0;
static GLfloat POINT_SCALE = 1.0;
static void *hud_font = GLUT_BITMAP_9_BY_15;
static void *label_font = GLUT_STROKE_MONO_ROMAN;
static GLfloat TRANS_X = 0.0;
static GLfloat TRANS_Y = 0.0;
static int LAST_BUTTON = 0;
static int DOWNX = 0;
static int DOWNY = 0;
static dq CURSOR_IP;
static unsigned int CURSOR_X;
static unsigned int CURSOR_Y;
static double MAP_X;
static double MAP_Y;
static dq CENTER_IP;
static bbox WINDOW;
static double HALF_LIFE = 10.0; /* seconds */
static unsigned int FADE_START = 0;
static pthread_t threadReadData;
//static pthread_t threadViewUpdate;
static pthread_mutex_t mutexData;
/*
* External functions which are not in .h files
*/
extern unsigned int xy_from_ip(unsigned ip, unsigned *xp, unsigned *yp);
extern unsigned int ip_from_xy(unsigned x, unsigned y, unsigned *ip);
extern int set_order();
extern void set_bits_per_pixel(int);
/*
* In-file Prototypes
*/
void decayData(double);
void decayByHalf();
#if DATA_DOUBLES
#define DATA_TYPE double
#else
#define DATA_TYPE uint8_t
#endif
DATA_TYPE ****DATA = 0;
dq
dq_from_ip(unsigned int i)
{
dq dq;
dq.a = (i >> 24);
dq.b = (i >> 16) & 0xFF;
dq.c = (i >> 8) & 0xFF;
dq.d = i & 0xFF;
return dq;
}
unsigned int
ip_from_dq(dq dq)
{
return (dq.a << 24) | (dq.b << 16) | (dq.c << 8) | dq.d;
}
DATA_TYPE *
data_ptr(unsigned int i)
{
DATA_TYPE ****A;
DATA_TYPE ***B;
DATA_TYPE **C;
DATA_TYPE *D;
dq dq = dq_from_ip(i);
pthread_mutex_lock(&mutexData);
A = DATA + dq.a;
if (0 == *A)
*A = calloc(256, sizeof(**A));
if (0 == *A)
return 0;
B = (*A) + dq.b;
if (0 == *B)
*B = calloc(256, sizeof(**B));
if (0 == *B)
return 0;
C = (*B) + dq.c;
if (0 == *C)
*C = calloc(256, sizeof(**C));
if (0 == *C)
return 0;
D = (*C) + dq.d;
pthread_mutex_unlock(&mutexData);
return D;
}
void
data_inc(unsigned int i)
{
DATA_TYPE *D = data_ptr((i & MASK_KEEP) | MASK_SET);
if (0 == D)
return;
if (*D < NUM_DATA_COLORS - 1)
(*D)++;
}
void
data_set(unsigned int i, unsigned int v)
{
DATA_TYPE *D = data_ptr((i & MASK_KEEP) | MASK_SET);
if (0 == D)
return;
if (v > 255)
v = 255;
*D = v;
}
void
read_input_stdin(void)
{
static double NEXT_PAUSE_CHECK = 0.0;
static double LAST_QPS_TIME = 0.0;
static unsigned int PNQUERY;
char buf[512];
unsigned int line = 1;
for (;;) {
unsigned int i;
char *strtok_arg = buf;
char *t;
char *e;
while (!READING)
usleep(1000);
if (0 == fgets(buf, 512, stdin)) {
READING = 0;
return;
}
NQUERY++;
if (OPT_BREAKPOINTS[BREAKPOINT_IDX] == NQUERY) {
READING = 0;
BREAKPOINT_IDX++;
continue;
}
/*
* The first field is a timestamp
*/
t = strtok(strtok_arg, WHITESPACE);
strtok_arg = NULL;
if (NULL == t)
continue;
FILE_TIME = strtod(t, &e);
if (e == t)
warnx("bad input parsing time on line %d: %s", line, t);
/*
* next field is an IP address. We also accept its integer notation
* equivalent.
*/
t = strtok(strtok_arg, WHITESPACE);
if (NULL == t)
continue;
if (strspn(t, "0123456789") == strlen(t))
i = strtoul(t, NULL, 10);
else if (1 == inet_pton(AF_INET, t, &i))
i = ntohl(i);
else
warnx("bad input parsing IP on line %d: %s", line, t);
//if (debug)
//fprintf(stderr, "%s => %u =>\n", t, i);
/* check for color value */
t = strtok(strtok_arg, WHITESPACE);
if (NULL == t)
data_inc(i);
else
data_set(i, strtoul(t, NULL, 10));
line++;
if (FILE_TIME >= NEXT_PAUSE_CHECK) {
double now;
double delta;
struct timeval tv;
gettimeofday(&tv, 0);
now = tv.tv_sec + 0.000001 * tv.tv_usec;
if (0 == FILE_TIME_OFFSET) {
FILE_TIME_OFFSET = now - (FILE_TIME / PLAYBACK_SPEED);
delta = 0;
} else {
delta = (FILE_TIME / PLAYBACK_SPEED) + FILE_TIME_OFFSET - now;
}
QPS = (double) (NQUERY - PNQUERY) / (FILE_TIME - LAST_QPS_TIME);
LAST_QPS_TIME = FILE_TIME;
NEXT_PAUSE_CHECK = FILE_TIME + 0.001;
PNQUERY = NQUERY;
if (delta > 0) {
if (delta > 1.0)
delta = 1.0;
unsigned int sleep_usecs = 1000000 * delta;
usleep(sleep_usecs);
}
}
}
}
void
read_input_stdin_binary(void)
{
unsigned int i1;
unsigned int i2;
for (;;) {
while (!READING)
usleep(1000);
if (4 != read(0, &i1, 4)) {
READING = 0;
return;
}
if (4 != read(0, &i2, 4)) {
READING = 0;
return;
}
NQUERY++;
/*
* The first field is a timestamp
*/
FILE_TIME = (double)ntohl(i1);
/*
* next field is an IP address. We also accept its integer notation
* equivalent.
*/
data_inc(i2);
if (0 == (NQUERY & 0xfff))
usleep(10000);
}
}
void
read_input_untimed(void)
{
char buf[512];
unsigned int line = 1;
while (line < 8192) {
unsigned int i;
char *strtok_arg = buf;
char *t;
if (0 == fgets(buf, 512, stdin)) {
READING = 0;
return;
}
NQUERY++;
/*
* first field is an IP address. We also accept its integer notation
* equivalent.
*/
t = strtok(strtok_arg, WHITESPACE);
strtok_arg = NULL;
if (NULL == t)
continue;
if (strspn(t, "0123456789") == strlen(t))
i = strtoul(t, NULL, 10);
else if (1 == inet_pton(AF_INET, t, &i))
i = ntohl(i);
else
warnx("bad input parsing IP on line %d: %s", line, t);
/*
* next (optional) field is a value
*/
t = strtok(strtok_arg, WHITESPACE);
if (NULL == t) {
data_inc(i);
} else {
unsigned int v;
v = strtoul(t, NULL, 10);
data_set(i, v);
}
line++;
}
}
int
blocking_read(int s, void *buf, int len)
{
int n = 0;
while (len) {
int x = read(s, buf, len);
if (x < 0)
return x;
if (x == 0)
usleep(1000);
n += x;
len -= x;
buf += x;
}
return n;
}
void
read_input_stream(void)
{
unsigned int i1;
unsigned int i2;
unsigned int i3;
for (;;) {
while (!READING)
usleep(1000);
if (4 != blocking_read(STREAM, &i1, 4)) {
READING = 0;
return;
}
if (4 != blocking_read(STREAM, &i2, 4)) {
READING = 0;
return;
}
if (4 != blocking_read(STREAM, &i3, 4)) {
READING = 0;
return;
}
NQUERY++;
/*
* The first field is a timestamp
*/
FILE_TIME = (double)ntohl(i1);
FILE_TIME += .000001 * ntohl(i2);
data_inc(i3);
}
}
void *
read_input(void *unused)
{
if (STREAM > -1)
read_input_stream();
else if (OPT_INPUT_UNTIMED)
read_input_untimed();
else
read_input_stdin();
fprintf(stderr, "exiting read_input()\n");
return 0;
}
dq
ip_from_map_xy(double mx, double my)
{
unsigned int i;
ip_from_xy(mx + 0.5, my + 0.5, &i);
return dq_from_ip(i);
}
bbox
window_box()
{
bbox b;
b.xmin = (int)(_32KD * (1.0 - TRANS_X - 1.0 / ZOOM_SCALE));
b.xmax = (int)(_32KD * (1.0 - TRANS_X + 1.0 / ZOOM_SCALE));
b.ymin = (int)(_32KD * (1.0 + TRANS_Y - 1.0 / ZOOM_SCALE));
b.ymax = (int)(_32KD * (1.0 + TRANS_Y + 1.0 / ZOOM_SCALE));
return b;
}
bool
box1_is_outside_box2(bbox smaller, bbox larger)
{
if (smaller.xmax < larger.xmin || smaller.xmin > larger.xmax)
return 1;
if (smaller.ymax < larger.ymin || smaller.ymin > larger.ymax)
return 1;
return 0;
}
double
auto_point_size()
{
if (!NPIX)
return 0;
return MIN(65536.0 / NPIX, 10.0);
}
void
drawData()
{
dq dq = {0, 0, 0, 0};
double R, G, B;
double R0 = -1.0;
double G0 = -1.0;
double B0 = -1.0;
glViewport(0, 0, MAPWIDTH, MAPHEIGHT);
glScissor(0, 0, MAPWIDTH, MAPHEIGHT);
glEnable(GL_SCISSOR_TEST);
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glScalef(ZOOM_SCALE, ZOOM_SCALE, ZOOM_SCALE);
glTranslatef(TRANS_X, TRANS_Y, 0.0);
glOrtho(0, _64K, _64K, 0, -1, 1);
//glMatrixMode(GL_MODELVIEW);
glDisable(GL_POINT_SMOOTH);
glHint(GL_POINT_SMOOTH_HINT, GL_FASTEST);
POINT_SIZE = POINT_SCALE * ZOOM_SCALE * MAPWIDTH / _64K;
if (OPT_AUTO_POINT_SIZE) {
double aps = auto_point_size();
POINT_SIZE = MAX(POINT_SIZE, aps);
}
//if (POINT_SIZE > 0.5)
//POINT_SIZE = ceil(POINT_SIZE);
POINT_SIZE = MIN(MAX(POINT_SIZE, 1.0), 64.0);
glPointSize(POINT_SIZE);
CENTER_IP = ip_from_map_xy((1.0 - TRANS_X) * _32KD, (1.0 + TRANS_Y) * _32KD);
NPIX = 0;
for (dq.a = 0; dq.a < 256; dq.a++) {
if (!DATA[dq.a])
continue;
dq.b = dq.c = dq.d = 0;
if (box1_is_outside_box2(bbox_from_int_slash(ip_from_dq(dq), 8), WINDOW))
continue;
for (dq.b = 0; dq.b < 256; dq.b++) {
if (!DATA[dq.a][dq.b])
continue;
dq.c = dq.d = 0;
if (box1_is_outside_box2(bbox_from_int_slash(ip_from_dq(dq), 16), WINDOW))
continue;
for (dq.c = 0; dq.c < 256; dq.c++) {
if (!DATA[dq.a][dq.b][dq.c])
continue;
dq.d = 0;
if (box1_is_outside_box2(bbox_from_int_slash(ip_from_dq(dq), 24), WINDOW))
continue;
for (dq.d = 0; dq.d < 256; dq.d++) {
unsigned int x, y;
DATA_TYPE v = DATA[dq.a][dq.b][dq.c][dq.d];
if (0 == v)
continue;
if (0 == xy_from_ip(ip_from_dq(dq), &x, &y)) {
fprintf(stderr, "failed to convert ip %u.%u.%u.%u to X,Y\n", dq.a, dq.b, dq.c, dq.d);
continue;
}
double hue = 240.0 * (256.0 - v) / 256.0;
HUE_TO_RGB(hue, R, G, B);
if (R0 != R || G0 != G || B0 != B) {
glEnd();
glColor4f(R0 = R, G0 = G, B0 = B, v > FADE_START ? (GLfloat) v : (GLfloat) v / FADE_START);
glBegin(GL_POINTS);
}
glVertex2f(x, y);
NPIX++;
}
}
}
}
glEnd();
}
void
drawCidrBox(double scale, const char *label, const char *fmt,...)
{
bbox box;
char cidr[64];
va_list ap;
GLfloat fw;
const char *s;
va_start(ap, fmt);
vsnprintf(cidr, sizeof(cidr), fmt, ap);
box = bbox_from_cidr(cidr);
if (box1_is_outside_box2(box, WINDOW))
return;
glLineWidth(1.0);
glBegin(GL_LINE_LOOP);
glVertex2f(-0.5 + box.xmin, -0.5 + box.ymin);
glVertex2f(-0.5 + box.xmin, 0.5 + box.ymax);
glVertex2f(0.5 + box.xmax, 0.5 + box.ymax);
glVertex2f(0.5 + box.xmax, -0.5 + box.ymin);
glEnd();
for (s = label, fw = 0; *s; s++)
fw += glutStrokeWidth(label_font, *s);
glPushMatrix();
fw /= scale;
glTranslatef((box.xmax + box.xmin - fw) / 2.0, (box.ymax + box.ymin) / 2.0, 0);
glScalef(1.0 / scale, 1.0 / scale, 1);
glOrtho(0, 2, 2, 0, 1, -1);
//the hilbert map is y = 0 at the top
// glLineWidth(POINT_SIZE * 3.0);
for (s = label; *s; s++)
glutStrokeCharacter(label_font, *s);
glPopMatrix();
}
void
drawLabelsA()
{
unsigned int a;
GLfloat alpha = ZOOM_INDEX < 60 ? (20.0 + ZOOM_INDEX) / 80.0 : (140.0 - ZOOM_INDEX) / 80.0;
if (alpha < 0.0 || alpha > 1.0)
return;
glColor4f(1.0, 1.0, 1.0, alpha);
for (a = 0; a < 256; a++) {
char buf[128];
snprintf(buf, sizeof(buf), "%u", a);
drawCidrBox(0.125, buf, "%u.0.0.0/8", a);
}
}
void
drawLabelsB()
{
dq ip = CENTER_IP;
GLfloat alpha = ZOOM_INDEX < 140 ? ((double)ZOOM_INDEX - 60.0) / 80.0 : (220.0 - ZOOM_INDEX) / 80.0;
if (alpha < 0.0 || alpha > 1.0)
return;
glColor4f(1.0, 1.0, 1.0, alpha);
for (ip.b = 0; ip.b < 256; ip.b++) {
char buf[128];
snprintf(buf, sizeof(buf), "%hu.%hu", ip.a, ip.b);
drawCidrBox(4.0, buf, "%hu.%hu.0.0/16", ip.a, ip.b);
}
}
void
drawLabelsC()
{
dq ip = CENTER_IP;
GLfloat alpha = ZOOM_INDEX < 220 ? ((double)ZOOM_INDEX - 140.0) / 80.0 : (300.0 - ZOOM_INDEX) / 80.0;
if (alpha < 0.0 || alpha > 1.0)
return;
glColor4f(1.0, 1.0, 1.0, alpha);
for (ip.c = 0; ip.c < 256; ip.c++) {
char buf[128];
snprintf(buf, sizeof(buf), "%hu.%hu.%hu", ip.a, ip.b, ip.c);
drawCidrBox(128.0, buf, "%hu.%hu.%hu.0/24", ip.a, ip.b, ip.c);
}
}
void
drawLabels()
{
if (ZOOM_INDEX < 140)
drawLabelsA();
if (ZOOM_INDEX > 60 && ZOOM_INDEX < 220)
drawLabelsB();
if (ZOOM_INDEX > 140 && ZOOM_INDEX < 300)
drawLabelsC();
}
void
drawStr(int x, int y, const char *fmt,...)
{
va_list ap;
char buffer[256], *s;
if (!fmt)
return;
if (y < 0)
y += MAPHEIGHT;
glRasterPos2d(x, y);
va_start(ap, fmt);
vsnprintf(buffer, sizeof(buffer), fmt, ap);
for (s = buffer; *s; s++)
glutBitmapCharacter(hud_font, *s);
}
void
drawText(void)
{
char tbuf[256];
time_t theTime = FILE_TIME;
glColor3f(0.7, 0.7, 0.7);
unsigned int n = 1;
int TW, TH;
if (WINWIDTH > WINHEIGHT) {
glViewport(MAPWIDTH, 0, TW = (WINWIDTH - MAPWIDTH), TH = WINHEIGHT);
glScissor(MAPWIDTH, 0, TW, TH);
} else {
glViewport(0, MAPHEIGHT, TW = WINWIDTH, TH = (WINHEIGHT - MAPHEIGHT));
glScissor(0, MAPHEIGHT, TW, TH);
}
glEnable(GL_SCISSOR_TEST);
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, TW, TH, 0, -1, 1);
strftime(tbuf, sizeof(tbuf), "%Y-%m-%d %H:%M:%S", gmtime(&theTime));
drawStr(5, n++ * 15, "File time %s", tbuf);
drawStr(5, n++ * 15, "NQUERY %12u", NQUERY);
drawStr(5, n++ * 15, "NPIX %12u", NPIX);
drawStr(5, n++ * 15, "QPS %12.2f", QPS);
drawStr(5, n++ * 15, "DRAW TIME %12.3f", DRAW_TIME);
drawStr(5, n++ * 15, "POINT SCALE %12.3f", POINT_SCALE);
drawStr(5, n++ * 15, "POINT SIZE %12.3f", POINT_SIZE);
n++;
drawStr(5, n++ * 15, "%s", "Controls");
drawStr(5, n++ * 15, "[-/=] Scale %7.3f/%d", ZOOM_SCALE, ZOOM_INDEX);
drawStr(5, n++ * 15, "[d/D] HALF LIFE %7.2fs", HALF_LIFE);
drawStr(5, n++ * 15, "[s/S] PLAYBACK SPEED %7.3fx", PLAYBACK_SPEED);
n++;
drawStr(5, n++ * 15, "%s", "Position");
drawStr(5, n++ * 15, "Translate %f, %f", TRANS_X, TRANS_Y);
drawStr(5, n++ * 15, "Cursor %u.%u.%u.%u", CURSOR_IP.a, CURSOR_IP.b, CURSOR_IP.c, CURSOR_IP.d);
drawStr(5, n++ * 15, "Window %d,%d", CURSOR_X, CURSOR_Y);
drawStr(5, n++ * 15, "Map X,Y %7.1f,%7.1f", MAP_X, MAP_Y);
}
GLfloat
zoom_scale()
{
return pow(ZOOM_BASE, (double)ZOOM_INDEX) / 2.0;
}
void
zoom_scale_up()
{
ZOOM_INDEX++;
if (ZOOM_INDEX > (ZOOM_STEPS * 13))
//4096 = 0.5 << 13
ZOOM_INDEX = (ZOOM_STEPS * 13);
ZOOM_SCALE = zoom_scale();
}
void
zoom_scale_dn()
{
ZOOM_INDEX--;
if (ZOOM_INDEX < 0)
ZOOM_INDEX = 0;
ZOOM_SCALE = zoom_scale();
}
/* ============================================================================ */
void
cb_Display(void)
{
unsigned int T0, T1;
T0 = glutGet(GLUT_ELAPSED_TIME);
WINDOW = window_box();
drawData();
drawLabels();
T1 = glutGet(GLUT_ELAPSED_TIME);
DRAW_TIME = 0.001 * (T1 - T0);
drawText();
glutSwapBuffers();
}
void
cb_Mouse(int button, int state, int x, int y)
{
/*
* These x,y coordinates are based on 0,0 in the top,left corner. Since Y
* increases downward, need to convert it to map coordinates.
*/
LAST_BUTTON = button;
y = WINHEIGHT - y;
CURSOR_X = x;
CURSOR_Y = y;
//fprintf(stderr, "button=%d, state=%d, x=%d, y=%d\n", button, state, x, y);
if (GLUT_UP == state)
return;
if (GLUT_LEFT_BUTTON == button) {
NOW = glutGet(GLUT_ELAPSED_TIME);
if (0 == DC_TIME || x != DOWNX || y != DOWNY) {
DC_TIME = NOW;
DOWNX = x;
DOWNY = y;
} else if (x == DOWNX && y == DOWNY && NOW - DC_TIME < 300) {
zoom_scale_up();
TRANS_X -= 2.0 * (x - MAPWIDTH / 2) / MAPWIDTH / ZOOM_SCALE;
TRANS_Y -= 2.0 * (y - MAPHEIGHT / 2) / MAPHEIGHT / ZOOM_SCALE;
DC_TIME = 0;
} else {
DC_TIME = NOW;
}
} else if (GLUT_RIGHT_BUTTON == button) {
DOWNX = x;
DOWNY = y;
} else if (3 == button) {
/* scroll up -- zoom in */
zoom_scale_up();
TRANS_X = (2.0 * CURSOR_X / MAPWIDTH - 1.0) / ZOOM_SCALE + 1.0 - MAP_X / _32K;
TRANS_Y = MAP_Y / _32K - 1.0 - (1.0 - 2.0 * CURSOR_Y / MAPHEIGHT) / ZOOM_SCALE;
} else if (4 == button) {
/* scroll down -- zoom out */
zoom_scale_dn();
TRANS_X = (2.0 * CURSOR_X / MAPWIDTH - 1.0) / ZOOM_SCALE + 1.0 - MAP_X / _32K;
TRANS_Y = MAP_Y / _32K - 1.0 - (1.0 - 2.0 * CURSOR_Y / MAPHEIGHT) / ZOOM_SCALE;
}
glutPostRedisplay();
}
void
cb_Drag(int x, int y)
{
static int THEN = 0;
/*
* These x,y coordinates are based on 0,0 in the top,left corner. Since Y
* increases downward, need to convert it to map coordinates.
*/
if (GLUT_LEFT_BUTTON == LAST_BUTTON) {
y = WINHEIGHT - y;
TRANS_X += 2.0 * (x - DOWNX) / MAPWIDTH / ZOOM_SCALE;
TRANS_Y += 2.0 * (y - DOWNY) / MAPHEIGHT / ZOOM_SCALE;
DOWNX = x;
DOWNY = y;
//printf("TRANS_X=%f TRANS_Y=%f\n", TRANS_X, TRANS_Y);
glutPostRedisplay();
} else if (GLUT_RIGHT_BUTTON == LAST_BUTTON) {
NOW = glutGet(GLUT_ELAPSED_TIME);
if (x > DOWNX && NOW - THEN > 5) {
zoom_scale_up();
TRANS_X = (2.0 * CURSOR_X / MAPWIDTH - 1.0) / ZOOM_SCALE + 1.0 - MAP_X / _32K;
TRANS_Y = MAP_Y / _32K - 1.0 - (1.0 - 2.0 * CURSOR_Y / MAPHEIGHT) / ZOOM_SCALE;
THEN = NOW;
} else if (x < DOWNX && NOW - THEN > 50) {
zoom_scale_dn();
TRANS_X = (2.0 * CURSOR_X / MAPWIDTH - 1.0) / ZOOM_SCALE + 1.0 - MAP_X / _32K;
TRANS_Y = MAP_Y / _32K - 1.0 - (1.0 - 2.0 * CURSOR_Y / MAPHEIGHT) / ZOOM_SCALE;
THEN = NOW;
}
DOWNX = x;
DOWNY = y;
}
}
void
cb_Motion(int wx, int wy)
{
/*
* These x,y coordinates are based on 0,0 in the top,left corner. Since Y
* increases downward, need to convert it to map coordinates.
*/
wy = WINHEIGHT - wy;
MAP_X = _32KD * ((2.0 * wx / MAPWIDTH - 1.0) / ZOOM_SCALE - TRANS_X + 1.0);
MAP_Y = _32KD * ((1.0 - 2.0 * wy / MAPHEIGHT) / ZOOM_SCALE + TRANS_Y + 1.0);
CURSOR_IP = ip_from_map_xy(MAP_X, MAP_Y);
CURSOR_X = wx;
CURSOR_Y = wy;
glutPostRedisplay();
}
void
cb_Reshape(int nw, int nh)
{
WINWIDTH = nw;
WINHEIGHT = nh;
MAPHEIGHT = WINHEIGHT < WINWIDTH ? WINHEIGHT : WINWIDTH;
MAPWIDTH = MAPHEIGHT;
}
void
resetGL(void)
{
}
void
toggle(bool * v)
{
*v = !*v;
}
void
cb_SpecialKey(int c, int x, int y)
{
switch (c) {
case GLUT_KEY_LEFT:
TRANS_X += .01 / ZOOM_SCALE;
break;
case GLUT_KEY_RIGHT:
TRANS_X -= .01 / ZOOM_SCALE;
break;
case GLUT_KEY_UP:
TRANS_Y -= .01 / ZOOM_SCALE;
break;
case GLUT_KEY_DOWN:
TRANS_Y += .01 / ZOOM_SCALE;
break;
};
glutPostRedisplay();
}
void
cb_Key(unsigned char c, int x, int y)
{
switch (c) {
case '=':
case '+':
zoom_scale_up();
break;
case '-':
case '_':
zoom_scale_dn();
break;
case ' ':
toggle(&READING);
if (!READING)
FILE_TIME_OFFSET = 0;
break;
case 'r':
TRANS_X = TRANS_Y = 0.0;
ZOOM_INDEX = ZOOM_STEPS;
zoom_scale_dn();
break;
case 'p':
POINT_SCALE -= 1.0;
if (POINT_SCALE < 1.0)
POINT_SCALE = 1.0;
break;
case 'P':
POINT_SCALE += 1.0;
break;
case 'h':
decayByHalf();
break;
case 'd':
HALF_LIFE -= 1.0;
if (HALF_LIFE < 0.0)
HALF_LIFE = 0.0;
break;
case 'D':
HALF_LIFE += 1.0;
break;
case 's':
FILE_TIME_OFFSET = 0;
if (PLAYBACK_SPEED)
PLAYBACK_SPEED /= 2.0;
else
PLAYBACK_SPEED = 1.0;
break;
case 'S':
FILE_TIME_OFFSET = 0;
PLAYBACK_SPEED *= 2.0;
break;
case 'q':
exit(0);
default:
return;
}
glutPostRedisplay();
}
void
cb_Idle(void)
{
static double FILE_TIME_LAST_DECAY = 0;
NOW = glutGet(GLUT_ELAPSED_TIME);
if ((NOW - TIMEBASE) > 10) {
glutPostRedisplay();
} else {
usleep(10000);
}
if (HALF_LIFE > 0.0 && FILE_TIME - FILE_TIME_LAST_DECAY >= 0.01) {
decayData(pow(2.0, -1.0 * (FILE_TIME - FILE_TIME_LAST_DECAY) / HALF_LIFE ));
FILE_TIME_LAST_DECAY = FILE_TIME;
}
}
void
decayData(double decay)
{
dq dq;
for (dq.a = 0; dq.a < 256; dq.a++) {
if (!DATA[dq.a])
continue;
for (dq.b = 0; dq.b < 256; dq.b++) {
if (!DATA[dq.a][dq.b])
continue;
for (dq.c = 0; dq.c < 256; dq.c++) {
if (!DATA[dq.a][dq.b][dq.c])
continue;
for (dq.d = 0; dq.d < 256; dq.d++) {
if (DATA[dq.a][dq.b][dq.c][dq.d]) {
DATA[dq.a][dq.b][dq.c][dq.d] *= decay;
}
}