source: nanovis/tags/1.1.2/nanovis.cpp @ 5722

Last change on this file since 5722 was 4804, checked in by ldelgass, 9 years ago

drop int from long int
  • Property svn:eol-style set to native
File size: 57.1 KB
Line 
1/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2/*
3 * ----------------------------------------------------------------------
4 * Nanovis: Visualization of Nanoelectronics Data
5 *
6 * ======================================================================
7 *  AUTHOR:  Wei Qiao <qiaow@purdue.edu>
8 *           Michael McLennan <mmclennan@purdue.edu>
9 *           Purdue Rendering and Perceptualization Lab (PURPL)
10 *
11 *  Copyright (c) 2004-2013  HUBzero Foundation, LLC
12 *
13 *  See the file "license.terms" for information on usage and
14 *  redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
15 * ======================================================================
16 */
17
18#include <assert.h>
19#include <errno.h>
20#include <fcntl.h>
21#include <getopt.h>
22#include <memory.h>
23#include <signal.h>
24#include <sys/resource.h>
25#include <sys/stat.h>
26#include <sys/time.h>
27#include <sys/times.h>
28#include <sys/types.h>
29#include <sys/uio.h> // for readv/writev
30#include <time.h>
31#include <unistd.h>
32
33#include <cstdlib>
34#include <cstdio>
35#include <cstring>
36#include <cmath>
37
38#include <iostream>
39#include <fstream>
40#include <sstream>
41#include <string>
42
43#include <GL/glew.h>
44#include <GL/glut.h>
45
46#include <RpEncode.h>
47
48#include <graphics/RenderContext.h>
49#include <vrmath/Vector3f.h>
50
51#include <util/FilePath.h>
52#include <util/Fonts.h>
53
54#include <BMPImageLoaderImpl.h>
55#include <ImageLoaderFactory.h>
56
57#include "config.h"
58#include "nanovis.h"
59#include "define.h"
60
61#include "Command.h"
62#include "Flow.h"
63#include "Grid.h"
64#include "HeightMap.h"
65#include "NvCamera.h"
66#include "NvShader.h"
67#include "NvLIC.h"
68#include "NvZincBlendeReconstructor.h"
69#include "PlaneRenderer.h"
70#ifdef USE_POINTSET_RENDERER
71#include "PointSetRenderer.h"
72#include "PointSet.h"
73#endif
74#include "Switch.h"
75#include "Trace.h"
76#include "Unirect.h"
77#include "VelocityArrowsSlice.h"
78#include "VolumeInterpolator.h"
79#include "VolumeRenderer.h"
80#include "ZincBlendeVolume.h"
81
82using namespace nv::graphics;
83using namespace nv::util;
84using namespace vrmath;
85
86#define SIZEOF_BMP_HEADER   54
87
88#define CVT2SECS(x)  ((double)(x).tv_sec) + ((double)(x).tv_usec * 1.0e-6)
89
90#define TRUE    1
91#define FALSE   0
92
93// STATIC MEMBER DATA
94
95FILE *NanoVis::stdin = NULL;
96FILE *NanoVis::logfile = NULL;
97FILE *NanoVis::recfile = NULL;
98
99NanoVis::Stats NanoVis::stats;
100int NanoVis::statsFile = -1;
101
102unsigned int NanoVis::flags = 0;
103bool NanoVis::debugFlag = false;
104bool NanoVis::axisOn = true;
105
106int NanoVis::winWidth = NPIX;
107int NanoVis::winHeight = NPIX;
108int NanoVis::renderWindow = 0;
109unsigned char *NanoVis::screenBuffer = NULL;
110Texture2D *NanoVis::legendTexture = NULL;
111Grid *NanoVis::grid = NULL;
112Fonts *NanoVis::fonts;
113int NanoVis::updir = Y_POS;
114NvCamera *NanoVis::cam = NULL;
115RenderContext *NanoVis::renderContext = NULL;
116
117NanoVis::TransferFunctionHashmap NanoVis::tfTable;
118NanoVis::VolumeHashmap NanoVis::volumeTable;
119NanoVis::FlowHashmap NanoVis::flowTable;
120NanoVis::HeightMapHashmap NanoVis::heightMapTable;
121
122double NanoVis::magMin = DBL_MAX;
123double NanoVis::magMax = -DBL_MAX;
124float NanoVis::xMin = FLT_MAX;
125float NanoVis::xMax = -FLT_MAX;
126float NanoVis::yMin = FLT_MAX;
127float NanoVis::yMax = -FLT_MAX;
128float NanoVis::zMin = FLT_MAX;
129float NanoVis::zMax = -FLT_MAX;
130float NanoVis::wMin = FLT_MAX;
131float NanoVis::wMax = -FLT_MAX;
132Vector3f NanoVis::sceneMin, NanoVis::sceneMax;
133
134VolumeRenderer *NanoVis::volRenderer = NULL;
135VelocityArrowsSlice *NanoVis::velocityArrowsSlice = NULL;
136NvLIC *NanoVis::licRenderer = NULL;
137PlaneRenderer *NanoVis::planeRenderer = NULL;
138#ifdef USE_POINTSET_RENDERER
139PointSetRenderer *NanoVis::pointSetRenderer = NULL;
140std::vector<PointSet *> NanoVis::pointSet;
141#endif
142
143Tcl_Interp *NanoVis::interp;
144
145// Image based flow visualization slice location
146// FLOW
147float NanoVis::_licSlice = 0.5f;
148int NanoVis::_licAxis = 2; // z axis
149
150//frame buffer for final rendering
151GLuint NanoVis::_finalFbo = 0;
152GLuint NanoVis::_finalColorTex = 0;
153GLuint NanoVis::_finalDepthRb = 0;
154
155// Default camera location.
156float def_eye_x = 0.0f;
157float def_eye_y = 0.0f;
158float def_eye_z = 2.5f;
159
160void
161NanoVis::removeAllData()
162{
163    TRACE("Enter");
164    if (grid != NULL) {
165        TRACE("Deleting grid");
166        delete grid;
167    }
168    if (cam != NULL) {
169        TRACE("Deleting cam");
170        delete cam;
171    }
172    if (volRenderer != NULL) {
173        TRACE("Deleting volRenderer");
174        delete volRenderer;
175    }
176    if (planeRenderer != NULL) {
177        TRACE("Deleting planeRenderer");
178        delete planeRenderer;
179    }
180    if (legendTexture != NULL) {
181        TRACE("Deleting legendTexture");
182        delete legendTexture;
183    }
184    TRACE("Deleting flows");
185    deleteFlows(interp);
186    if (licRenderer != NULL) {
187        TRACE("Deleting licRenderer");
188        delete licRenderer;
189    }
190    if (velocityArrowsSlice != NULL) {
191        TRACE("Deleting velocityArrowsSlice");
192        delete velocityArrowsSlice;
193    }
194    if (renderContext != NULL) {
195        TRACE("Deleting renderContext");
196        delete renderContext;
197    }
198    if (screenBuffer != NULL) {
199        TRACE("Deleting screenBuffer");
200        delete [] screenBuffer;
201        screenBuffer = NULL;
202    }
203#ifdef USE_POINTSET_RENDERER
204    if (pointSetRenderer != NULL) {
205        TRACE("Deleting pointSetRenderer");
206        delete pointSetRenderer;
207    }
208    for (std::vector<PointSet *>::iterator itr = pointSet.begin();
209         itr != pointSet.end(); ++itr) {
210        TRACE("Deleting pointSet: %p", *itr);
211        delete (*itr);
212    }
213#endif
214    if (fonts != NULL) {
215        TRACE("Deleting fonts");
216        delete fonts;
217    }
218    TRACE("Leave");
219}
220
221void
222NanoVis::eventuallyRedraw(unsigned int flag)
223{
224    if (flag) {
225        flags |= flag;
226    }
227    if ((flags & REDRAW_PENDING) == 0) {
228        glutPostRedisplay();
229        flags |= REDRAW_PENDING;
230    }
231}
232
233#ifdef KEEPSTATS
234
235#ifndef STATSDIR
236#define STATSDIR        "/var/tmp/visservers"
237#endif  /*STATSDIR*/
238
239int
240NanoVis::getStatsFile(Tcl_Obj *objPtr)
241{
242    Tcl_DString ds;
243    char fileName[33];
244    char pidstr[200];
245    const char *path;
246    md5_state_t state;
247    md5_byte_t digest[16];
248    char *string;
249    int length;
250
251    if ((objPtr == NULL) || (statsFile >= 0)) {
252        return statsFile;
253    }
254    /* By itself the client's key/value pairs aren't unique.  Add in the
255     * process id of this render server. */
256    sprintf(pidstr, "%ld", (long)stats.pid);
257
258    /* Create an md5 hash of the key/value pairs and use it as the file name. */
259    string = Tcl_GetStringFromObj(objPtr, &length);
260    md5_init(&state);
261    md5_append(&state, (const md5_byte_t *)string, strlen(string));
262    md5_append(&state, (const md5_byte_t *)pidstr, strlen(pidstr));
263    md5_finish(&state, digest);
264    for (int i = 0; i < 16; i++) {
265        sprintf(fileName + i * 2, "%02x", digest[i]);
266    }
267    Tcl_DStringInit(&ds);
268    Tcl_DStringAppend(&ds, STATSDIR, -1);
269    Tcl_DStringAppend(&ds, "/", 1);
270    Tcl_DStringAppend(&ds, fileName, 32);
271    path = Tcl_DStringValue(&ds);
272
273    statsFile = open(path, O_EXCL | O_CREAT | O_WRONLY, 0600);
274    Tcl_DStringFree(&ds);
275    if (statsFile < 0) {
276        ERROR("can't open \"%s\": %s", fileName, strerror(errno));
277        return -1;
278    }
279    return statsFile;
280}
281
282int
283NanoVis::writeToStatsFile(int f, const char *s, size_t length)
284{
285    if (f >= 0) {
286        ssize_t numWritten;
287
288        numWritten = write(f, s, length);
289        if (numWritten == (ssize_t)length) {
290            close(dup(f));
291        }
292    }
293    return 0;
294}
295
296static int
297serverStats(int code)
298{
299    double start, finish;
300    char buf[BUFSIZ];
301    Tcl_DString ds;
302    int result;
303
304    {
305        struct timeval tv;
306
307        /* Get ending time.  */
308        gettimeofday(&tv, NULL);
309        finish = CVT2SECS(tv);
310        tv = NanoVis::stats.start;
311        start = CVT2SECS(tv);
312    }
313    /*
314     * Session information:
315     *   - Name of render server
316     *   - Process ID
317     *   - Hostname where server is running
318     *   - Start date of session
319     *   - Start date of session in seconds
320     *   - Number of frames returned
321     *   - Number of bytes total returned (in frames)
322     *   - Number of commands received
323     *   - Total elapsed time of all commands
324     *   - Total elapsed time of session
325     *   - Exit code of vizserver
326     *   - User time
327     *   - System time
328     *   - User time of children
329     *   - System time of children
330     */
331
332    Tcl_DStringInit(&ds);
333   
334    Tcl_DStringAppendElement(&ds, "render_stop");
335    /* renderer */
336    Tcl_DStringAppendElement(&ds, "renderer");
337    Tcl_DStringAppendElement(&ds, "nanovis");
338    /* pid */
339    Tcl_DStringAppendElement(&ds, "pid");
340    sprintf(buf, "%d", NanoVis::stats.pid);
341    Tcl_DStringAppendElement(&ds, buf);
342    /* host */
343    Tcl_DStringAppendElement(&ds, "host");
344    gethostname(buf, BUFSIZ-1);
345    buf[BUFSIZ-1] = '\0';
346    Tcl_DStringAppendElement(&ds, buf);
347    /* date */
348    Tcl_DStringAppendElement(&ds, "date");
349    strcpy(buf, ctime(&NanoVis::stats.start.tv_sec));
350    buf[strlen(buf) - 1] = '\0';
351    Tcl_DStringAppendElement(&ds, buf);
352    /* date_secs */
353    Tcl_DStringAppendElement(&ds, "date_secs");
354    sprintf(buf, "%ld", NanoVis::stats.start.tv_sec);
355    Tcl_DStringAppendElement(&ds, buf);
356    /* num_frames */
357    Tcl_DStringAppendElement(&ds, "num_frames");
358    sprintf(buf, "%lu", (unsigned long)NanoVis::stats.nFrames);
359    Tcl_DStringAppendElement(&ds, buf);
360    /* frame_bytes */
361    Tcl_DStringAppendElement(&ds, "frame_bytes");
362    sprintf(buf, "%lu", (unsigned long)NanoVis::stats.nBytes);
363    Tcl_DStringAppendElement(&ds, buf);
364    /* num_commands */
365    Tcl_DStringAppendElement(&ds, "num_commands");
366    sprintf(buf, "%lu", (unsigned long)NanoVis::stats.nCommands);
367    Tcl_DStringAppendElement(&ds, buf);
368    /* cmd_time */
369    Tcl_DStringAppendElement(&ds, "cmd_time");
370    sprintf(buf, "%g", NanoVis::stats.cmdTime);
371    Tcl_DStringAppendElement(&ds, buf);
372    /* session_time */
373    Tcl_DStringAppendElement(&ds, "session_time");
374    sprintf(buf, "%g", finish - start);
375    Tcl_DStringAppendElement(&ds, buf);
376    /* status */
377    Tcl_DStringAppendElement(&ds, "status");
378    sprintf(buf, "%d", code);
379    Tcl_DStringAppendElement(&ds, buf);
380    {
381        long clocksPerSec = sysconf(_SC_CLK_TCK);
382        double clockRes = 1.0 / clocksPerSec;
383        struct tms tms;
384
385        memset(&tms, 0, sizeof(tms));
386        times(&tms);
387        /* utime */
388        Tcl_DStringAppendElement(&ds, "utime");
389        sprintf(buf, "%g", tms.tms_utime * clockRes);
390        Tcl_DStringAppendElement(&ds, buf);
391        /* stime */
392        Tcl_DStringAppendElement(&ds, "stime");
393        sprintf(buf, "%g", tms.tms_stime * clockRes);
394        Tcl_DStringAppendElement(&ds, buf);
395        /* cutime */
396        Tcl_DStringAppendElement(&ds, "cutime");
397        sprintf(buf, "%g", tms.tms_cutime * clockRes);
398        Tcl_DStringAppendElement(&ds, buf);
399        /* cstime */
400        Tcl_DStringAppendElement(&ds, "cstime");
401        sprintf(buf, "%g", tms.tms_cstime * clockRes);
402        Tcl_DStringAppendElement(&ds, buf);
403    }
404    Tcl_DStringAppend(&ds, "\n", -1);
405    int f = NanoVis::getStatsFile(NULL);
406    result = NanoVis::writeToStatsFile(f, Tcl_DStringValue(&ds),
407                                       Tcl_DStringLength(&ds));
408    close(f);
409    Tcl_DStringFree(&ds);
410    return result;
411}
412
413#endif
414
415static void
416initService()
417{
418    TRACE("Enter");
419
420    const char* user = getenv("USER");
421    char* logName = NULL;
422    int logNameLen = 0;
423
424    if (user == NULL) {
425        logNameLen = 20+1;
426        logName = (char *)calloc(logNameLen, sizeof(char));
427        strncpy(logName, "/tmp/nanovis_log.txt", logNameLen);
428    } else {
429        logNameLen = 17+1+strlen(user);
430        logName = (char *)calloc(logNameLen, sizeof(char));
431        strncpy(logName, "/tmp/nanovis_log_", logNameLen);
432        strncat(logName, user, strlen(user));
433    }
434
435    //open log and map stderr to log file
436    NanoVis::logfile = fopen(logName, "w");
437    dup2(fileno(NanoVis::logfile), 2);
438    /* dup2(2,1); */
439
440    // clean up malloc'd memory
441    if (logName != NULL) {
442        free(logName);
443    }
444
445    TRACE("Leave");
446}
447
448static void
449exitService(int code)
450{
451    TRACE("Enter: %d", code);
452
453    NanoVis::removeAllData();
454
455    NvShader::exitCg();
456
457    //close log file
458    if (NanoVis::logfile != NULL) {
459        fclose(NanoVis::logfile);
460        NanoVis::logfile = NULL;
461    }
462
463#ifdef KEEPSTATS
464    serverStats(code);
465#endif
466    closelog();
467
468    exit(code);
469}
470
471static int
472executeCommand(Tcl_Interp *interp, Tcl_DString *dsPtr)
473{
474    struct timeval tv;
475    double start, finish;
476    int result;
477
478#ifdef WANT_TRACE
479    char *str = Tcl_DStringValue(dsPtr);
480    std::string cmd(str);
481    cmd.erase(cmd.find_last_not_of(" \n\r\t")+1);
482    TRACE("command %lu: '%s'", NanoVis::stats.nCommands+1, cmd.c_str());
483#endif
484
485    gettimeofday(&tv, NULL);
486    start = CVT2SECS(tv);
487
488    if (NanoVis::recfile != NULL) {
489        fprintf(NanoVis::recfile, "%s", Tcl_DStringValue(dsPtr));
490        fflush(NanoVis::recfile);
491    }
492    result = Tcl_Eval(interp, Tcl_DStringValue(dsPtr));
493    Tcl_DStringSetLength(dsPtr, 0);
494
495    gettimeofday(&tv, NULL);
496    finish = CVT2SECS(tv);
497
498    NanoVis::stats.cmdTime += finish - start;
499    NanoVis::stats.nCommands++;
500    TRACE("Leave status=%d", result);
501    return result;
502}
503
504void
505NanoVis::pan(float dx, float dy)
506{
507    /* Move the camera and its target by equal amounts along the x and y
508     * axes. */
509    TRACE("pan: x=%f, y=%f", dx, dy);
510
511    cam->x(def_eye_x - dx);
512    cam->y(def_eye_y + dy);
513    TRACE("set eye to %f %f", cam->x(), cam->y());
514}
515
516void
517NanoVis::zoom(float z)
518{
519    /* Move the camera and its target by equal amounts along the x and y
520     * axes. */
521    TRACE("zoom: z=%f", z);
522
523    cam->z(def_eye_z / z);
524
525    collectBounds();
526    cam->resetClippingRange(sceneMin, sceneMax);
527
528    TRACE("set cam z to %f", cam->z());
529}
530
531void
532NanoVis::resetCamera(bool resetOrientation)
533{
534    TRACE("Resetting all=%d", resetOrientation ? 1 : 0);
535
536    collectBounds();
537    cam->reset(sceneMin, sceneMax, resetOrientation);
538
539    def_eye_x = cam->x();
540    def_eye_y = cam->y();
541    def_eye_z = cam->z();
542}
543
544/** \brief Load a 3D volume
545 *
546 * \param name Volume ID
547 * \param width Number of samples in X direction
548 * \param height Number of samples in Y direction
549 * \param depth Number of samples in Z direction
550 * \param numComponents the number of scalars for each space point. All component
551 * scalars for a point are placed consequtively in data array
552 * width, height and depth: number of points in each dimension
553 * \param data Array of floats
554 * \param vmin Min value of field
555 * \param vmax Max value of field
556 * \param nonZeroMin Minimum non-zero value of field
557 * \param data pointer to an array of floats.
558 */
559Volume *
560NanoVis::loadVolume(const char *name, int width, int height, int depth,
561                    int numComponents, float *data, double vmin, double vmax,
562                    double nonZeroMin)
563{
564    VolumeHashmap::iterator itr = volumeTable.find(name);
565    if (itr != volumeTable.end()) {
566        WARN("volume \"%s\" already exists", name);
567        removeVolume(itr->second);
568    }
569
570    Volume *volume = new Volume(0.f, 0.f, 0.f,
571                                width, height, depth,
572                                numComponents,
573                                data, vmin, vmax, nonZeroMin);
574    Volume::updatePending = true;
575    volume->name(name);
576    volumeTable[name] = volume;
577
578    return volume;
579}
580
581// Gets a colormap 1D texture by name.
582TransferFunction *
583NanoVis::getTransferFunction(const TransferFunctionId& id)
584{
585    TransferFunctionHashmap::iterator itr = tfTable.find(id);
586    if (itr == tfTable.end()) {
587        TRACE("No transfer function named \"%s\" found", id.c_str());
588        return NULL;
589    } else {
590        return itr->second;
591    }
592}
593
594// Creates of updates a colormap 1D texture by name.
595TransferFunction *
596NanoVis::defineTransferFunction(const TransferFunctionId& id,
597                                size_t n, float *data)
598{
599    TransferFunction *tf = getTransferFunction(id);
600    if (tf == NULL) {
601        TRACE("Creating new transfer function \"%s\"", id.c_str());
602        tf = new TransferFunction(id.c_str(), n, data);
603        tfTable[id] = tf;
604    } else {
605        TRACE("Updating existing transfer function \"%s\"", id.c_str());
606        tf->update(n, data);
607    }
608    return tf;
609}
610
611int
612NanoVis::renderLegend(TransferFunction *tf, double min, double max,
613                      int width, int height, const char *volArg)
614{
615    TRACE("Enter");
616
617    int old_width = winWidth;
618    int old_height = winHeight;
619
620    planeRenderer->setScreenSize(width, height);
621    resizeOffscreenBuffer(width, height);
622
623    // generate data for the legend
624    float data[512];
625    for (int i=0; i < 256; i++) {
626        data[i] = data[i+256] = (float)(i/255.0);
627    }
628    legendTexture = new Texture2D(256, 2, GL_FLOAT, GL_LINEAR, 1, data);
629    int index = planeRenderer->addPlane(legendTexture, tf);
630    planeRenderer->setActivePlane(index);
631
632    bindOffscreenBuffer();
633    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //clear screen
634    planeRenderer->render();
635
636    // INSOO
637    glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, screenBuffer);
638    //glReadPixels(0, 0, width, height, GL_BGR, GL_UNSIGNED_BYTE, screenBuffer); // INSOO's
639
640    {
641        char prefix[200];
642        ssize_t nWritten;
643
644        TRACE("Sending ppm legend image %s min:%g max:%g", volArg, min, max);
645        sprintf(prefix, "nv>legend %s %g %g", volArg, min, max);
646        ppmWrite(prefix);
647        nWritten = write(1, "\n", 1);
648        assert(nWritten == 1);
649    }
650    planeRenderer->removePlane(index);
651    resizeOffscreenBuffer(old_width, old_height);
652
653    delete legendTexture;
654    legendTexture = NULL;
655    TRACE("Leave");
656    return TCL_OK;
657}
658
659//initialize frame buffer objects for offscreen rendering
660void
661NanoVis::initOffscreenBuffer()
662{
663    TRACE("Enter");
664    assert(_finalFbo == 0);
665    // Initialize a fbo for final display.
666    glGenFramebuffersEXT(1, &_finalFbo);
667
668    glGenTextures(1, &_finalColorTex);
669    glBindTexture(GL_TEXTURE_2D, _finalColorTex);
670
671    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
672    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
673    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
674
675#if defined(HAVE_FLOAT_TEXTURES) && defined(USE_HALF_FLOAT)
676    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, winWidth, winHeight, 0,
677                 GL_RGB, GL_INT, NULL);
678#elif defined(HAVE_FLOAT_TEXTURES)
679    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, winWidth, winHeight, 0,
680                 GL_RGB, GL_INT, NULL);
681#else
682    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, winWidth, winHeight, 0,
683                 GL_RGB, GL_INT, NULL);
684#endif
685
686    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _finalFbo);
687    glGenRenderbuffersEXT(1, &_finalDepthRb);
688    glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb);
689    glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24,
690                             winWidth, winHeight);
691    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
692                              GL_TEXTURE_2D, _finalColorTex, 0);
693    glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
694                                 GL_RENDERBUFFER_EXT, _finalDepthRb);
695
696    GLenum status;
697    if (!CheckFBO(&status)) {
698        PrintFBOStatus(status, "finalFbo");
699        exitService(3);
700    }
701
702    TRACE("Leave");
703}
704
705//resize the offscreen buffer
706void
707NanoVis::resizeOffscreenBuffer(int w, int h)
708{
709    TRACE("Enter (%d, %d)", w, h);
710    if ((w == winWidth) && (h == winHeight)) {
711        return;
712    }
713    winWidth = w;
714    winHeight = h;
715
716    if (fonts) {
717        fonts->resize(w, h);
718    }
719    TRACE("screenBuffer size: %d %d", w, h);
720
721    if (screenBuffer != NULL) {
722        delete [] screenBuffer;
723        screenBuffer = NULL;
724    }
725
726    screenBuffer = new unsigned char[4*winWidth*winHeight];
727    assert(screenBuffer != NULL);
728   
729    //delete the current render buffer resources
730    glDeleteTextures(1, &_finalColorTex);
731    glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb);
732    glDeleteRenderbuffersEXT(1, &_finalDepthRb);
733
734    TRACE("before deleteframebuffers");
735    glDeleteFramebuffersEXT(1, &_finalFbo);
736
737    TRACE("reinitialize FBO");
738    //Reinitialize final fbo for final display
739    glGenFramebuffersEXT(1, &_finalFbo);
740
741    glGenTextures(1, &_finalColorTex);
742    glBindTexture(GL_TEXTURE_2D, _finalColorTex);
743
744    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
745    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
746    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
747
748#if defined(HAVE_FLOAT_TEXTURES) && defined(USE_HALF_FLOAT)
749    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, winWidth, winHeight, 0,
750                 GL_RGB, GL_INT, NULL);
751#elif defined(HAVE_FLOAT_TEXTURES)
752    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, winWidth, winHeight, 0,
753                 GL_RGB, GL_INT, NULL);
754#else
755    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, winWidth, winHeight, 0,
756                 GL_RGB, GL_INT, NULL);
757#endif
758
759    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _finalFbo);
760    glGenRenderbuffersEXT(1, &_finalDepthRb);
761    glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb);
762    glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24,
763                             winWidth, winHeight);
764    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
765                              GL_TEXTURE_2D, _finalColorTex, 0);
766    glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
767                                 GL_RENDERBUFFER_EXT, _finalDepthRb);
768
769    GLenum status;
770    if (!CheckFBO(&status)) {
771        PrintFBOStatus(status, "finalFbo");
772        exitService(3);
773    }
774
775    TRACE("change camera");
776    //change the camera setting
777    cam->setScreenSize(0, 0, winWidth, winHeight);
778    planeRenderer->setScreenSize(winWidth, winHeight);
779
780    TRACE("Leave (%d, %d)", w, h);
781}
782
783static
784void cgErrorCallback(void)
785{
786    if (!NvShader::printErrorInfo()) {
787        TRACE("Cg error, exiting...");
788        exitService(-1);
789    }
790}
791
792void NanoVis::init(const char* path)
793{
794    // print OpenGL driver information
795    TRACE("-----------------------------------------------------------");
796    TRACE("OpenGL version: %s", glGetString(GL_VERSION));
797    TRACE("OpenGL vendor: %s", glGetString(GL_VENDOR));
798    TRACE("OpenGL renderer: %s", glGetString(GL_RENDERER));
799    TRACE("-----------------------------------------------------------");
800
801    if (path == NULL) {
802        ERROR("No path defined for shaders or resources");
803        exitService(1);
804    }
805    GLenum err = glewInit();
806    if (GLEW_OK != err) {
807        ERROR("Can't init GLEW: %s", glewGetErrorString(err));
808        exitService(1);
809    }
810    TRACE("Using GLEW %s", glewGetString(GLEW_VERSION));
811
812    // OpenGL 2.1 includes VBOs, PBOs, MRT, NPOT textures, point parameters, point sprites,
813    // GLSL 1.2, and occlusion queries.
814    if (!GLEW_VERSION_2_1) {
815        ERROR("OpenGL version 2.1 or greater is required");
816        exitService(1);
817    }
818
819    // NVIDIA driver may report OpenGL 2.1, but not support PBOs in
820    // indirect GLX contexts
821    if (!GLEW_ARB_pixel_buffer_object) {
822        ERROR("Pixel buffer objects are not supported by driver, please check that the user running nanovis has permissions to create a direct rendering context (e.g. user has read/write access to /dev/nvidia* device nodes in Linux).");
823        exitService(1);
824    }
825
826    // Additional extensions not in 2.1 core
827
828    // Framebuffer objects were promoted in 3.0
829    if (!GLEW_EXT_framebuffer_object) {
830        ERROR("EXT_framebuffer_oject extension is required");
831        exitService(1);
832    }
833    // Rectangle textures were promoted in 3.1
834    // FIXME: can use NPOT in place of rectangle textures
835    if (!GLEW_ARB_texture_rectangle) {
836        ERROR("ARB_texture_rectangle extension is required");
837        exitService(1);
838    }
839#ifdef HAVE_FLOAT_TEXTURES
840    // Float color buffers and textures were promoted in 3.0
841    if (!GLEW_ARB_texture_float ||
842        !GLEW_ARB_color_buffer_float) {
843        ERROR("ARB_texture_float and ARB_color_buffer_float extensions are required");
844        exitService(1);
845    }
846#endif
847    // FIXME: should use ARB programs or (preferably) a GLSL profile for portability
848    if (!GLEW_NV_vertex_program3 ||
849        !GLEW_NV_fragment_program2) {
850        ERROR("NV_vertex_program3 and NV_fragment_program2 extensions are required");
851        exitService(1);
852    }
853
854    if (!FilePath::getInstance()->setPath(path)) {
855        ERROR("can't set file path to %s", path);
856        exitService(1);
857    }
858
859    ImageLoaderFactory::getInstance()->addLoaderImpl("bmp", new BMPImageLoaderImpl());
860
861    NvShader::initCg();
862    NvShader::setErrorCallback(cgErrorCallback);
863
864    fonts = new Fonts();
865    fonts->addFont("verdana", "verdana.fnt");
866    fonts->setFont("verdana");
867
868    velocityArrowsSlice = new VelocityArrowsSlice;
869    licRenderer = new NvLIC(NMESH, NPIX, NPIX, _licAxis, _licSlice);
870
871    grid = new Grid();
872    grid->setFont(fonts);
873
874#ifdef USE_POINTSET_RENDERER
875    pointSetRenderer = new PointSetRenderer();
876#endif
877}
878
879void
880NanoVis::initGL()
881{
882    TRACE("in initGL");
883    //buffer to store data read from the screen
884    if (screenBuffer) {
885        delete[] screenBuffer;
886        screenBuffer = NULL;
887    }
888    screenBuffer = new unsigned char[4*winWidth*winHeight];
889    assert(screenBuffer != NULL);
890
891    //create the camera with default setting
892    cam = new NvCamera(0, 0, winWidth, winHeight,
893                       def_eye_x, def_eye_y, def_eye_z);
894
895    glEnable(GL_TEXTURE_2D);
896    glShadeModel(GL_FLAT);
897    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
898    glClearColor(0, 0, 0, 1);
899    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
900
901    //initialize lighting
902    GLfloat mat_specular[] = {1.0, 1.0, 1.0, 1.0};
903    GLfloat mat_shininess[] = {30.0};
904    GLfloat white_light[] = {1.0, 1.0, 1.0, 1.0};
905    GLfloat green_light[] = {0.1, 0.5, 0.1, 1.0};
906
907    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
908    glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
909    glLightfv(GL_LIGHT0, GL_DIFFUSE, white_light);
910    glLightfv(GL_LIGHT0, GL_SPECULAR, white_light);
911    glLightfv(GL_LIGHT1, GL_DIFFUSE, green_light);
912    glLightfv(GL_LIGHT1, GL_SPECULAR, white_light);
913
914    initOffscreenBuffer();    //frame buffer object for offscreen rendering
915
916    //create volume renderer
917    volRenderer = new VolumeRenderer();
918
919    // create
920    renderContext = new RenderContext();
921
922    //create a 2D plane renderer
923    planeRenderer = new PlaneRenderer(winWidth, winHeight);
924
925    //assert(glGetError()==0);
926
927    TRACE("leaving initGL");
928}
929
930// used internally to build up the BMP file header
931// Writes an integer value into the header data structure at pos
932static inline void
933bmpHeaderAddInt(unsigned char* header, int& pos, int data)
934{
935#ifdef WORDS_BIGENDIAN
936    header[pos++] = (data >> 24) & 0xFF;
937    header[pos++] = (data >> 16) & 0xFF;
938    header[pos++] = (data >> 8)  & 0xFF;
939    header[pos++] = (data)       & 0xFF;
940#else
941    header[pos++] = data & 0xff;
942    header[pos++] = (data >> 8) & 0xff;
943    header[pos++] = (data >> 16) & 0xff;
944    header[pos++] = (data >> 24) & 0xff;
945#endif
946}
947
948// INSOO
949// FOR DEBUGGING
950void
951NanoVis::bmpWriteToFile(int frame_number, const char *directory_name)
952{
953    unsigned char header[SIZEOF_BMP_HEADER];
954    int pos = 0;
955    header[pos++] = 'B';
956    header[pos++] = 'M';
957
958    // BE CAREFUL:  BMP files must have an even multiple of 4 bytes
959    // on each scan line.  If need be, we add padding to each line.
960    int pad = 0;
961    if ((3*winWidth) % 4 > 0) {
962        pad = 4 - ((3*winWidth) % 4);
963    }
964
965    // file size in bytes
966    int fsize = (3*winWidth+pad)*winHeight + SIZEOF_BMP_HEADER;
967    bmpHeaderAddInt(header, pos, fsize);
968
969    // reserved value (must be 0)
970    bmpHeaderAddInt(header, pos, 0);
971
972    // offset in bytes to start of bitmap data
973    bmpHeaderAddInt(header, pos, SIZEOF_BMP_HEADER);
974
975    // size of the BITMAPINFOHEADER
976    bmpHeaderAddInt(header, pos, 40);
977
978    // width of the image in pixels
979    bmpHeaderAddInt(header, pos, winWidth);
980
981    // height of the image in pixels
982    bmpHeaderAddInt(header, pos, winHeight);
983
984    // 1 plane + (24 bits/pixel << 16)
985    bmpHeaderAddInt(header, pos, 1572865);
986
987    // no compression
988    // size of image for compression
989    bmpHeaderAddInt(header, pos, 0);
990    bmpHeaderAddInt(header, pos, 0);
991
992    // x pixels per meter
993    // y pixels per meter
994    bmpHeaderAddInt(header, pos, 0);
995    bmpHeaderAddInt(header, pos, 0);
996
997    // number of colors used (0 = compute from bits/pixel)
998    // number of important colors (0 = all colors important)
999    bmpHeaderAddInt(header, pos, 0);
1000    bmpHeaderAddInt(header, pos, 0);
1001
1002    // BE CAREFUL: BMP format wants BGR ordering for screen data
1003    unsigned char* scr = screenBuffer;
1004    for (int row=0; row < winHeight; row++) {
1005        for (int col=0; col < winWidth; col++) {
1006            unsigned char tmp = scr[2];
1007            scr[2] = scr[0];  // B
1008            scr[0] = tmp;     // R
1009            scr += 3;
1010        }
1011        scr += pad;  // skip over padding already in screen data
1012    }
1013
1014    FILE* f;
1015    char filename[100];
1016    if (frame_number >= 0) {
1017        if (directory_name)
1018            sprintf(filename, "%s/image%03d.bmp", directory_name, frame_number);
1019        else
1020            sprintf(filename, "/tmp/flow_animation/image%03d.bmp", frame_number);
1021
1022        TRACE("Writing %s", filename);
1023        f = fopen(filename, "wb");
1024        if (f == 0) {
1025            ERROR("cannot create file");
1026        }
1027    } else {
1028        f = fopen("/tmp/image.bmp", "wb");
1029        if (f == 0) {
1030            ERROR("cannot create file");
1031        }
1032    }
1033    if (fwrite(header, SIZEOF_BMP_HEADER, 1, f) != 1) {
1034        ERROR("can't write header: short write");
1035    }
1036    if (fwrite(screenBuffer, (3*winWidth+pad)*winHeight, 1, f) != 1) {
1037        ERROR("can't write data: short write");
1038    }
1039    fclose(f);
1040}
1041
1042void
1043NanoVis::bmpWrite(const char *prefix)
1044{
1045    unsigned char header[SIZEOF_BMP_HEADER];
1046    ssize_t nWritten;
1047    int pos = 0;
1048
1049    // BE CAREFUL:  BMP files must have an even multiple of 4 bytes
1050    // on each scan line.  If need be, we add padding to each line.
1051    int pad = 0;
1052    if ((3*winWidth) % 4 > 0) {
1053        pad = 4 - ((3*winWidth) % 4);
1054    }
1055    pad = 0;
1056    int fsize = (3*winWidth+pad)*winHeight + sizeof(header);
1057
1058    char string[200];
1059    sprintf(string, "%s %d\n", prefix, fsize);
1060    nWritten = write(1, string, strlen(string));
1061    assert(nWritten == (ssize_t)strlen(string));
1062    header[pos++] = 'B';
1063    header[pos++] = 'M';
1064
1065    // file size in bytes
1066    bmpHeaderAddInt(header, pos, fsize);
1067
1068    // reserved value (must be 0)
1069    bmpHeaderAddInt(header, pos, 0);
1070
1071    // offset in bytes to start of bitmap data
1072    bmpHeaderAddInt(header, pos, SIZEOF_BMP_HEADER);
1073
1074    // size of the BITMAPINFOHEADER
1075    bmpHeaderAddInt(header, pos, 40);
1076
1077    // width of the image in pixels
1078    bmpHeaderAddInt(header, pos, winWidth);
1079
1080    // height of the image in pixels
1081    bmpHeaderAddInt(header, pos, winHeight);
1082
1083    // 1 plane + (24 bits/pixel << 16)
1084    bmpHeaderAddInt(header, pos, 1572865);
1085
1086    // no compression
1087    // size of image for compression
1088    bmpHeaderAddInt(header, pos, 0);
1089    bmpHeaderAddInt(header, pos, 0);
1090
1091    // x pixels per meter
1092    // y pixels per meter
1093    bmpHeaderAddInt(header, pos, 0);
1094    bmpHeaderAddInt(header, pos, 0);
1095
1096    // number of colors used (0 = compute from bits/pixel)
1097    // number of important colors (0 = all colors important)
1098    bmpHeaderAddInt(header, pos, 0);
1099    bmpHeaderAddInt(header, pos, 0);
1100
1101    // BE CAREFUL: BMP format wants BGR ordering for screen data
1102    unsigned char* scr = screenBuffer;
1103    for (int row=0; row < winHeight; row++) {
1104        for (int col=0; col < winWidth; col++) {
1105            unsigned char tmp = scr[2];
1106            scr[2] = scr[0];  // B
1107            scr[0] = tmp;     // R
1108            scr += 3;
1109        }
1110        scr += pad;  // skip over padding already in screen data
1111    }
1112
1113    nWritten = write(1, header, SIZEOF_BMP_HEADER);
1114    assert(nWritten == SIZEOF_BMP_HEADER);
1115    nWritten = write(1, screenBuffer, (3*winWidth+pad)*winHeight);
1116    assert(nWritten == (3*winWidth+pad)*winHeight);
1117    stats.nFrames++;
1118    stats.nBytes += (3*winWidth+pad)*winHeight;
1119}
1120
1121/*
1122 * ppmWrite --
1123 *
1124 *  Writes the screen image as PPM binary data to the nanovisviewer
1125 *  client.  The PPM binary format is very simple.
1126 *
1127 *      P6 w h 255\n
1128 *      3-byte RGB pixel data.
1129 *
1130 *  The nanovisviewer client (using the TkImg library) will do less work
1131 *  to unpack this format, as opposed to BMP or PNG.  (This doesn't
1132 *  eliminate the need to look into DXT compression performed on the GPU).
1133 *
1134 *      Note that currently the image data from the screen is both row-padded
1135 *      and the scan lines are reversed.  This routine could be made even
1136 *      simpler (faster) if the screen buffer is an array of packed 3-bytes
1137 *      per pixels (no padding) and where the origin is the top-left corner.
1138 */
1139void
1140NanoVis::ppmWrite(const char *prefix)
1141{
1142#define PPM_MAXVAL 255
1143    char header[200];
1144
1145    TRACE("Enter (%dx%d)", winWidth, winHeight);
1146    // Generate the PPM binary file header
1147    sprintf(header, "P6 %d %d %d\n", winWidth, winHeight, PPM_MAXVAL);
1148
1149    size_t header_length = strlen(header);
1150    size_t data_length = winWidth * winHeight * 3;
1151
1152    char command[200];
1153    sprintf(command, "%s %lu\n", prefix,
1154            (unsigned long)header_length + data_length);
1155
1156    size_t wordsPerRow = (winWidth * 24 + 31) / 32;
1157    size_t bytesPerRow = wordsPerRow * 4;
1158    size_t rowLength = winWidth * 3;
1159    size_t nRecs = winHeight + 2;
1160
1161    struct iovec *iov;
1162    iov = (struct iovec *)malloc(sizeof(struct iovec) * nRecs);
1163
1164    // Write the nanovisviewer command, then the image header and data.
1165    // Command
1166    iov[0].iov_base = command;
1167    iov[0].iov_len = strlen(command);
1168    // Header of image data
1169    iov[1].iov_base = header;
1170    iov[1].iov_len = header_length;
1171    // Image data.
1172    int y;
1173    unsigned char *srcRowPtr = screenBuffer;
1174    for (y = winHeight + 1; y >= 2; y--) {
1175        iov[y].iov_base = srcRowPtr;
1176        iov[y].iov_len = rowLength;
1177        srcRowPtr += bytesPerRow;
1178    }
1179    if (writev(1, iov, nRecs) < 0) {
1180        ERROR("write failed: %s", strerror(errno));
1181    }
1182    free(iov);
1183    stats.nFrames++;
1184    stats.nBytes += (bytesPerRow * winHeight);
1185    TRACE("Leave (%dx%d)", winWidth, winHeight);
1186}
1187
1188void
1189NanoVis::sendDataToClient(const char *command, const char *data, size_t dlen)
1190{
1191    size_t numRecords = 2;
1192
1193    struct iovec *iov = new iovec[numRecords];
1194
1195    // Write the nanovisviewer command, then the image header and data.
1196    // Command
1197    // FIXME: shouldn't have to cast this
1198    iov[0].iov_base = (char *)command;
1199    iov[0].iov_len = strlen(command);
1200    // Data
1201    // FIXME: shouldn't have to cast this
1202    iov[1].iov_base = (char *)data;
1203    iov[1].iov_len = dlen;
1204    if (writev(1, iov, numRecords) < 0) {
1205        ERROR("write failed: %s", strerror(errno));
1206    }
1207    delete [] iov;
1208}
1209
1210void
1211NanoVis::idle()
1212{
1213    TRACE("Enter");
1214
1215    glutSetWindow(renderWindow);
1216
1217    processCommands();
1218
1219    TRACE("Leave");
1220}
1221
1222void
1223NanoVis::draw3dAxis()
1224{
1225    glPushAttrib(GL_ENABLE_BIT);
1226
1227    glDisable(GL_TEXTURE_2D);
1228    glEnable(GL_DEPTH_TEST);
1229    glEnable(GL_COLOR_MATERIAL);
1230    glDisable(GL_BLEND);
1231
1232    //draw axes
1233    GLUquadric *obj;
1234
1235    obj = gluNewQuadric();
1236
1237    int segments = 50;
1238
1239    glColor3f(0.8, 0.8, 0.8);
1240    glPushMatrix();
1241    glTranslatef(0.4, 0., 0.);
1242    glRotatef(90, 1, 0, 0);
1243    glRotatef(180, 0, 1, 0);
1244    glScalef(0.0005, 0.0005, 0.0005);
1245    glutStrokeCharacter(GLUT_STROKE_ROMAN, 'x');
1246    glPopMatrix();
1247
1248    glPushMatrix();
1249    glTranslatef(0., 0.4, 0.);
1250    glRotatef(90, 1, 0, 0);
1251    glRotatef(180, 0, 1, 0);
1252    glScalef(0.0005, 0.0005, 0.0005);
1253    glutStrokeCharacter(GLUT_STROKE_ROMAN, 'y');
1254    glPopMatrix();
1255
1256    glPushMatrix();
1257    glTranslatef(0., 0., 0.4);
1258    glRotatef(90, 1, 0, 0);
1259    glRotatef(180, 0, 1, 0);
1260    glScalef(0.0005, 0.0005, 0.0005);
1261    glutStrokeCharacter(GLUT_STROKE_ROMAN, 'z');
1262    glPopMatrix();
1263
1264    glEnable(GL_LIGHTING);
1265    glEnable(GL_LIGHT0);
1266
1267    //glColor3f(0.2, 0.2, 0.8);
1268    glPushMatrix();
1269    glutSolidSphere(0.02, segments, segments );
1270    glPopMatrix();
1271
1272    glPushMatrix();
1273    glRotatef(-90, 1, 0, 0);
1274    gluCylinder(obj, 0.01, 0.01, 0.3, segments, segments);
1275    glPopMatrix();
1276
1277    glPushMatrix();
1278    glTranslatef(0., 0.3, 0.);
1279    glRotatef(-90, 1, 0, 0);
1280    gluCylinder(obj, 0.02, 0.0, 0.06, segments, segments);
1281    glPopMatrix();
1282
1283    glPushMatrix();
1284    glRotatef(90, 0, 1, 0);
1285    gluCylinder(obj, 0.01, 0.01, 0.3, segments, segments);
1286    glPopMatrix();
1287
1288    glPushMatrix();
1289    glTranslatef(0.3, 0., 0.);
1290    glRotatef(90, 0, 1, 0);
1291    gluCylinder(obj, 0.02, 0.0, 0.06, segments, segments);
1292    glPopMatrix();
1293
1294    glPushMatrix();
1295    gluCylinder(obj, 0.01, 0.01, 0.3, segments, segments);
1296    glPopMatrix();
1297
1298    glPushMatrix();
1299    glTranslatef(0., 0., 0.3);
1300    gluCylinder(obj, 0.02, 0.0, 0.06, segments, segments);
1301    glPopMatrix();
1302
1303    gluDeleteQuadric(obj);
1304
1305    glPopAttrib();
1306}
1307
1308void NanoVis::update()
1309{
1310    VolumeInterpolator *volInterp = volRenderer->getVolumeInterpolator();
1311    if (volInterp->isStarted()) {
1312        struct timeval clock;
1313        gettimeofday(&clock, NULL);
1314        double elapsed_time;
1315
1316        elapsed_time = clock.tv_sec + clock.tv_usec/1000000.0 -
1317            volInterp->getStartTime();
1318
1319        TRACE("%lf %lf", elapsed_time,
1320              volInterp->getInterval());
1321        float fraction;
1322        float f;
1323
1324        f = fmod((float) elapsed_time, (float)volInterp->getInterval());
1325        if (f == 0.0) {
1326            fraction = 0.0f;
1327        } else {
1328            fraction = f / volInterp->getInterval();
1329        }
1330        TRACE("fraction : %f", fraction);
1331        volInterp->update(fraction);
1332    }
1333}
1334
1335void
1336NanoVis::setVolumeRanges()
1337{
1338    double xMin, xMax, yMin, yMax, zMin, zMax, wMin, wMax;
1339
1340    TRACE("Enter");
1341    xMin = yMin = zMin = wMin = DBL_MAX;
1342    xMax = yMax = zMax = wMax = -DBL_MAX;
1343    VolumeHashmap::iterator itr;
1344    for (itr = volumeTable.begin();
1345         itr != volumeTable.end(); ++itr) {
1346        Volume *volume = itr->second;
1347        if (xMin > volume->xAxis.min()) {
1348            xMin = volume->xAxis.min();
1349        }
1350        if (xMax < volume->xAxis.max()) {
1351            xMax = volume->xAxis.max();
1352        }
1353        if (yMin > volume->yAxis.min()) {
1354            yMin = volume->yAxis.min();
1355        }
1356        if (yMax < volume->yAxis.max()) {
1357            yMax = volume->yAxis.max();
1358        }
1359        if (zMin > volume->zAxis.min()) {
1360            zMin = volume->zAxis.min();
1361        }
1362        if (zMax < volume->zAxis.max()) {
1363            zMax = volume->zAxis.max();
1364        }
1365        if (wMin > volume->wAxis.min()) {
1366            wMin = volume->wAxis.min();
1367        }
1368        if (wMax < volume->wAxis.max()) {
1369            wMax = volume->wAxis.max();
1370        }
1371    }
1372    if ((xMin < DBL_MAX) && (xMax > -DBL_MAX)) {
1373        grid->xAxis.setScale(xMin, xMax);
1374    }
1375    if ((yMin < DBL_MAX) && (yMax > -DBL_MAX)) {
1376        grid->yAxis.setScale(yMin, yMax);
1377    }
1378    if ((zMin < DBL_MAX) && (zMax > -DBL_MAX)) {
1379        grid->zAxis.setScale(zMin, zMax);
1380    }
1381    if ((wMin < DBL_MAX) && (wMax > -DBL_MAX)) {
1382        Volume::valueMin = wMin;
1383        Volume::valueMax = wMax;
1384    }
1385    Volume::updatePending = false;
1386    TRACE("Leave");
1387}
1388
1389void
1390NanoVis::setHeightmapRanges()
1391{
1392    double xMin, xMax, yMin, yMax, zMin, zMax, wMin, wMax;
1393
1394    TRACE("Enter");
1395    xMin = yMin = zMin = wMin = DBL_MAX;
1396    xMax = yMax = zMax = wMax = -DBL_MAX;
1397    HeightMapHashmap::iterator itr;
1398    for (itr = heightMapTable.begin();
1399         itr != heightMapTable.end(); ++itr) {
1400        HeightMap *heightMap = itr->second;
1401        if (xMin > heightMap->xAxis.min()) {
1402            xMin = heightMap->xAxis.min();
1403        }
1404        if (xMax < heightMap->xAxis.max()) {
1405            xMax = heightMap->xAxis.max();
1406        }
1407        if (yMin > heightMap->yAxis.min()) {
1408            yMin = heightMap->yAxis.min();
1409        }
1410        if (yMax < heightMap->yAxis.max()) {
1411            yMax = heightMap->yAxis.max();
1412        }
1413        if (zMin > heightMap->zAxis.min()) {
1414            zMin = heightMap->zAxis.min();
1415        }
1416        if (zMax < heightMap->zAxis.max()) {
1417            zMax = heightMap->zAxis.max();
1418        }
1419        if (wMin > heightMap->wAxis.min()) {
1420            wMin = heightMap->wAxis.min();
1421        }
1422        if (wMax < heightMap->wAxis.max()) {
1423            wMax = heightMap->wAxis.max();
1424        }
1425    }
1426    if ((xMin < DBL_MAX) && (xMax > -DBL_MAX)) {
1427        grid->xAxis.setScale(xMin, xMax);
1428    }
1429    if ((yMin < DBL_MAX) && (yMax > -DBL_MAX)) {
1430        grid->yAxis.setScale(yMin, yMax);
1431    }
1432    if ((zMin < DBL_MAX) && (zMax > -DBL_MAX)) {
1433        grid->zAxis.setScale(zMin, zMax);
1434    }
1435    if ((wMin < DBL_MAX) && (wMax > -DBL_MAX)) {
1436        HeightMap::valueMin = grid->yAxis.min();
1437        HeightMap::valueMax = grid->yAxis.max();
1438    }
1439    for (HeightMapHashmap::iterator itr = heightMapTable.begin();
1440         itr != heightMapTable.end(); ++itr) {
1441        itr->second->mapToGrid(grid);
1442    }
1443    HeightMap::updatePending = false;
1444    TRACE("Leave");
1445}
1446
1447void
1448NanoVis::collectBounds(bool onlyVisible)
1449{
1450    if (flags & MAP_FLOWS) {
1451        mapFlows();
1452        grid->xAxis.setScale(xMin, xMax);
1453        grid->yAxis.setScale(yMin, yMax);
1454        grid->zAxis.setScale(zMin, zMax);
1455    }
1456
1457    sceneMin.set(FLT_MAX, FLT_MAX, FLT_MAX);
1458    sceneMax.set(-FLT_MAX, -FLT_MAX, -FLT_MAX);
1459
1460    for (VolumeHashmap::iterator itr = volumeTable.begin();
1461         itr != volumeTable.end(); ++itr) {
1462        Volume *volume = itr->second;
1463
1464        if (onlyVisible && !volume->visible())
1465            continue;
1466
1467        Vector3f bmin, bmax;
1468        volume->getWorldSpaceBounds(bmin, bmax);
1469        if (bmin.x > bmax.x)
1470            continue;
1471
1472        if (sceneMin.x > bmin.x) {
1473            sceneMin.x = bmin.x;
1474        }
1475        if (sceneMax.x < bmax.x) {
1476            sceneMax.x = bmax.x;
1477        }
1478        if (sceneMin.y > bmin.y) {
1479            sceneMin.y = bmin.y;
1480        }
1481        if (sceneMax.y < bmax.y) {
1482            sceneMax.y = bmax.y;
1483        }
1484        if (sceneMin.z > bmin.z) {
1485            sceneMin.z = bmin.z;
1486        }
1487        if (sceneMax.z < bmax.z) {
1488            sceneMax.z = bmax.z;
1489        }
1490    }
1491
1492    for (HeightMapHashmap::iterator itr = heightMapTable.begin();
1493         itr != heightMapTable.end(); ++itr) {
1494        HeightMap *heightMap = itr->second;
1495
1496        if (onlyVisible && !heightMap->isVisible())
1497            continue;
1498
1499        Vector3f bmin, bmax;
1500        heightMap->getWorldSpaceBounds(bmin, bmax);
1501        if (bmin.x > bmax.x)
1502            continue;
1503
1504        if (sceneMin.x > bmin.x) {
1505            sceneMin.x = bmin.x;
1506        }
1507        if (sceneMax.x < bmax.x) {
1508            sceneMax.x = bmax.x;
1509        }
1510        if (sceneMin.y > bmin.y) {
1511            sceneMin.y = bmin.y;
1512        }
1513        if (sceneMax.y < bmax.y) {
1514            sceneMax.y = bmax.y;
1515        }
1516        if (sceneMin.z > bmin.z) {
1517            sceneMin.z = bmin.z;
1518        }
1519        if (sceneMax.z < bmax.z) {
1520            sceneMax.z = bmax.z;
1521        }
1522    }
1523
1524    Vector3f flowMin, flowMax;
1525    getFlowBounds(flowMin, flowMax, onlyVisible);
1526    if (flowMin.x < flowMax.x) {
1527        if (sceneMin.x > flowMin.x) {
1528            sceneMin.x = flowMin.x;
1529        }
1530        if (sceneMax.x < flowMax.x) {
1531            sceneMax.x = flowMax.x;
1532        }
1533        if (sceneMin.y > flowMin.y) {
1534            sceneMin.y = flowMin.y;
1535        }
1536        if (sceneMax.y < flowMax.y) {
1537            sceneMax.y = flowMax.y;
1538        }
1539        if (sceneMin.z > flowMin.z) {
1540            sceneMin.z = flowMin.z;
1541        }
1542        if (sceneMax.z < flowMax.z) {
1543            sceneMax.z = flowMax.z;
1544        }
1545    }
1546
1547    // TODO: Get Grid bounds
1548
1549    if (sceneMin.x > sceneMax.x) {
1550        sceneMin.set(-0.5, -0.5, -0.5);
1551        sceneMax.set( 0.5,  0.5,  0.5);
1552    }
1553
1554    TRACE("Scene bounds: (%g,%g,%g) - (%g,%g,%g)",
1555          sceneMin.x, sceneMin.y, sceneMin.z,
1556          sceneMax.x, sceneMax.y, sceneMax.z);
1557}
1558
1559void
1560NanoVis::setBgColor(float color[3])
1561{
1562    TRACE("Setting bgcolor to %g %g %g", color[0], color[1], color[2]);
1563    glClearColor(color[0], color[1], color[2], 1);
1564}
1565
1566Flow *
1567NanoVis::getFlow(const char *name)
1568{
1569    FlowHashmap::iterator itr = flowTable.find(name);
1570    if (itr == flowTable.end()) {
1571        TRACE("Can't find flow '%s'", name);
1572        return NULL;
1573    }
1574    return itr->second;
1575}
1576
1577Flow *
1578NanoVis::createFlow(Tcl_Interp *interp, const char *name)
1579{
1580    FlowHashmap::iterator itr = flowTable.find(name);
1581    if (itr != flowTable.end()) {
1582        ERROR("Flow '%s' already exists", name);
1583        return NULL;
1584    }
1585    Flow *flow = new Flow(interp, name);
1586    flowTable[name] = flow;
1587    return flow;
1588}
1589
1590/**
1591 * \brief Delete flow object and hash table entry
1592 *
1593 * This is called by the flow command instance delete callback
1594 */
1595void
1596NanoVis::deleteFlow(const char *name)
1597{
1598    FlowHashmap::iterator itr = flowTable.find(name);
1599    if (itr != flowTable.end()) {
1600        delete itr->second;
1601        flowTable.erase(itr);
1602    }
1603}
1604
1605/**
1606 * \brief Delete all flow object commands
1607 *
1608 * This will also delete the flow objects and hash table entries
1609 */
1610void
1611NanoVis::deleteFlows(Tcl_Interp *interp)
1612{
1613    FlowHashmap::iterator itr;
1614    for (itr = flowTable.begin();
1615         itr != flowTable.end(); ++itr) {
1616        Tcl_DeleteCommandFromToken(interp, itr->second->getCommandToken());
1617    }
1618    flowTable.clear();
1619}
1620
1621bool
1622NanoVis::mapFlows()
1623{
1624    TRACE("Enter");
1625
1626    flags &= ~MAP_FLOWS;
1627
1628    /*
1629     * Step 1. Get the overall min and max magnitudes of all the
1630     *         flow vectors.
1631     */
1632    magMin = DBL_MAX, magMax = -DBL_MAX;
1633
1634    for (FlowHashmap::iterator itr = flowTable.begin();
1635         itr != flowTable.end(); ++itr) {
1636        Flow *flow = itr->second;
1637        double min, max;
1638        if (!flow->isDataLoaded()) {
1639            continue;
1640        }
1641        Rappture::Unirect3d *data = flow->data();
1642        min = data->magMin();
1643        max = data->magMax();
1644        if (min < magMin) {
1645            magMin = min;
1646        }
1647        if (max > magMax) {
1648            magMax = max;
1649        }
1650        if (data->xMin() < xMin) {
1651            xMin = data->xMin();
1652        }
1653        if (data->yMin() < yMin) {
1654            yMin = data->yMin();
1655        }
1656        if (data->zMin() < zMin) {
1657            zMin = data->zMin();
1658        }
1659        if (data->xMax() > xMax) {
1660            xMax = data->xMax();
1661        }
1662        if (data->yMax() > yMax) {
1663            yMax = data->yMax();
1664        }
1665        if (data->zMax() > zMax) {
1666            zMax = data->zMax();
1667        }
1668    }
1669
1670    TRACE("magMin=%g magMax=%g", NanoVis::magMin, NanoVis::magMax);
1671
1672    /*
1673     * Step 2. Generate the vector field from each data set.
1674     */
1675    for (FlowHashmap::iterator itr = flowTable.begin();
1676         itr != flowTable.end(); ++itr) {
1677        Flow *flow = itr->second;
1678        if (!flow->isDataLoaded()) {
1679            continue; // Flow exists, but no data has been loaded yet.
1680        }
1681        if (flow->visible()) {
1682            flow->initializeParticles();
1683        }
1684        if (!flow->scaleVectorField()) {
1685            return false;
1686        }
1687        // FIXME: This doesn't work when there is more than one flow.
1688        licRenderer->setOffset(flow->getRelativePosition());
1689        velocityArrowsSlice->slicePos(flow->getRelativePosition());
1690    }
1691    advectFlows();
1692    return true;
1693}
1694
1695void
1696NanoVis::getFlowBounds(Vector3f& min,
1697                       Vector3f& max,
1698                       bool onlyVisible)
1699{
1700    TRACE("Enter");
1701
1702    min.set(FLT_MAX, FLT_MAX, FLT_MAX);
1703    max.set(-FLT_MAX, -FLT_MAX, -FLT_MAX);
1704
1705    for (FlowHashmap::iterator itr = flowTable.begin();
1706         itr != flowTable.end(); ++itr) {
1707        itr->second->getBounds(min, max, onlyVisible);
1708    }
1709}
1710
1711void
1712NanoVis::renderFlows()
1713{
1714    for (FlowHashmap::iterator itr = flowTable.begin();
1715         itr != flowTable.end(); ++itr) {
1716        Flow *flow = itr->second;
1717        if (flow->isDataLoaded() && flow->visible()) {
1718            flow->render();
1719        }
1720    }
1721    flags &= ~REDRAW_PENDING;
1722}
1723
1724void
1725NanoVis::resetFlows()
1726{
1727    if (licRenderer->active()) {
1728        NanoVis::licRenderer->reset();
1729    }
1730    for (FlowHashmap::iterator itr = flowTable.begin();
1731         itr != flowTable.end(); ++itr) {
1732        Flow *flow = itr->second;
1733        if (flow->isDataLoaded() && flow->visible()) {
1734            flow->resetParticles();
1735        }
1736    }
1737}   
1738
1739void
1740NanoVis::advectFlows()
1741{
1742    for (FlowHashmap::iterator itr = flowTable.begin();
1743         itr != flowTable.end(); ++itr) {
1744        Flow *flow = itr->second;
1745        if (flow->isDataLoaded() && flow->visible()) {
1746            flow->advect();
1747        }
1748    }
1749}
1750
1751void
1752NanoVis::render()
1753{
1754    TRACE("Enter");
1755
1756    if (flags & MAP_FLOWS) {
1757#ifdef notdef
1758        xMin = yMin = zMin = wMin = FLT_MAX, magMin = DBL_MAX;
1759        xMax = yMax = zMax = wMax = -FLT_MAX, magMax = -DBL_MAX;
1760#endif
1761        mapFlows();
1762        grid->xAxis.setScale(xMin, xMax);
1763        grid->yAxis.setScale(yMin, yMax);
1764        grid->zAxis.setScale(zMin, zMax);
1765    }
1766    //assert(glGetError()==0);
1767    if (HeightMap::updatePending) {
1768        setHeightmapRanges();
1769    }
1770    if (Volume::updatePending) {
1771        setVolumeRanges();
1772    }
1773
1774    //start final rendering
1775
1776    // Need to reset fbo since it may have been changed to default (0)
1777    bindOffscreenBuffer();
1778
1779    //clear screen
1780    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
1781
1782    glEnable(GL_DEPTH_TEST);
1783    glEnable(GL_COLOR_MATERIAL);
1784
1785    //camera setting activated
1786    cam->initialize();
1787
1788    //set up the orientation of items in the scene.
1789    glPushMatrix();
1790
1791    switch (updir) {
1792    case X_POS:
1793        glRotatef(90, 0, 0, 1);
1794        glRotatef(90, 1, 0, 0);
1795        break;
1796    case Y_POS:
1797        // this is the default
1798        break;
1799    case Z_POS:
1800        glRotatef(-90, 1, 0, 0);
1801        glRotatef(-90, 0, 0, 1);
1802        break;
1803    case X_NEG:
1804        glRotatef(-90, 0, 0, 1);
1805        break;
1806    case Y_NEG:
1807        glRotatef(180, 0, 0, 1);
1808        glRotatef(-90, 0, 1, 0);
1809        break;
1810    case Z_NEG:
1811        glRotatef(90, 1, 0, 0);
1812        break;
1813    }
1814
1815    //now render things in the scene
1816    if (axisOn) {
1817        draw3dAxis();
1818    }
1819    if (grid->isVisible()) {
1820        grid->render();
1821    }
1822    if ((licRenderer != NULL) && (licRenderer->active())) {
1823        licRenderer->render();
1824    }
1825    if ((velocityArrowsSlice != NULL) && (velocityArrowsSlice->enabled())) {
1826        velocityArrowsSlice->render();
1827    }
1828    if (!flowTable.empty()) {
1829        renderFlows();
1830    }
1831
1832    volRenderer->renderAll();
1833
1834    TRACE("Render heightmaps");
1835    HeightMapHashmap::iterator itr;
1836    for (itr = heightMapTable.begin();
1837         itr != heightMapTable.end(); ++itr) {
1838        HeightMap *heightMap = itr->second;
1839        if (heightMap->isVisible()) {
1840            heightMap->render(renderContext);
1841        }
1842    }
1843    glPopMatrix();
1844
1845    CHECK_FRAMEBUFFER_STATUS();
1846    TRACE("Leave");
1847}
1848
1849void
1850NanoVis::processCommands()
1851{
1852    flags &= ~REDRAW_PENDING;
1853
1854    TRACE("Enter");
1855
1856    int flags = fcntl(0, F_GETFL, 0);
1857    fcntl(0, F_SETFL, flags & ~O_NONBLOCK);
1858
1859    int status = TCL_OK;
1860
1861    //  Read and execute as many commands as we can from stdin...
1862    Tcl_DString cmdbuffer;
1863    Tcl_DStringInit(&cmdbuffer);
1864    int nCommands = 0;
1865    bool isComplete = false;
1866    while ((!feof(NanoVis::stdin)) && (status == TCL_OK)) {
1867        //
1868        //  Read the next command from the buffer.  First time through we
1869        //  block here and wait if necessary until a command comes in.
1870        //
1871        //  BE CAREFUL: Read only one command, up to a newline.  The "volume
1872        //  data follows" command needs to be able to read the data
1873        //  immediately following the command, and we shouldn't consume it
1874        //  here.
1875        //
1876        while (!feof(NanoVis::stdin)) {
1877            int c = fgetc(NanoVis::stdin);
1878            char ch;
1879            if (c <= 0) {
1880                if (errno == EWOULDBLOCK) {
1881                    break;
1882                }
1883                exitService(100);
1884            }
1885            ch = (char)c;
1886            Tcl_DStringAppend(&cmdbuffer, &ch, 1);
1887            if (ch == '\n') {
1888                isComplete = Tcl_CommandComplete(Tcl_DStringValue(&cmdbuffer));
1889                if (isComplete) {
1890                    break;
1891                }
1892            }
1893        }
1894        // no command? then we're done for now
1895        if (Tcl_DStringLength(&cmdbuffer) == 0) {
1896            break;
1897        }
1898        if (isComplete) {
1899            // back to original flags during command evaluation...
1900            fcntl(0, F_SETFL, flags & ~O_NONBLOCK);
1901            status = executeCommand(interp, &cmdbuffer);
1902            // non-blocking for next read -- we might not get anything
1903            fcntl(0, F_SETFL, flags | O_NONBLOCK);
1904            isComplete = false;
1905            nCommands++;
1906            CHECK_FRAMEBUFFER_STATUS();
1907        }
1908    }
1909    fcntl(0, F_SETFL, flags);
1910
1911    if (status != TCL_OK) {
1912        char *msg;
1913        char hdr[200];
1914        int msgSize, hdrSize;
1915        Tcl_Obj *objPtr;
1916
1917        objPtr = Tcl_GetObjResult(interp);
1918        msg = Tcl_GetStringFromObj(objPtr, &msgSize);
1919        hdrSize = sprintf(hdr, "nv>viserror -type internal_error -bytes %d\n", msgSize);
1920        {
1921            struct iovec iov[2];
1922
1923            iov[0].iov_base = hdr;
1924            iov[0].iov_len = hdrSize;
1925            iov[1].iov_base = msg;
1926            iov[1].iov_len = msgSize;
1927            if (writev(1, iov, 2) < 0) {
1928                ERROR("write failed: %s", strerror(errno));
1929            }
1930        }
1931        TRACE("Leaving on ERROR");
1932        return;
1933    }
1934    if (feof(NanoVis::stdin)) {
1935        TRACE("Exiting server on EOF from client");
1936        exitService(90);
1937    }
1938
1939    update();
1940
1941    bindOffscreenBuffer();  //enable offscreen render
1942    render();
1943    readScreen();
1944
1945    if (feof(NanoVis::stdin)) {
1946        exitService(90);
1947    }
1948
1949    ppmWrite("nv>image -type image -bytes");
1950
1951    TRACE("Leave");
1952}
1953
1954int
1955main(int argc, char **argv)
1956{
1957    const char *path;
1958    char *newPath;
1959
1960    newPath = NULL;
1961    path = NULL;
1962    NanoVis::stdin = stdin;
1963
1964    fprintf(stdout, "NanoVis %s (build %s)\n", NANOVIS_VERSION, SVN_VERSION);
1965    fflush(stdout);
1966
1967    openlog("nanovis", LOG_CONS | LOG_PERROR | LOG_PID, LOG_USER);
1968    memset(&NanoVis::stats, 0, sizeof(NanoVis::Stats));
1969    NanoVis::stats.pid = getpid();
1970    gettimeofday(&NanoVis::stats.start, NULL);
1971
1972    /* Initialize GLUT here so it can parse and remove GLUT-specific
1973     * command-line options before we parse the command-line below. */
1974    glutInit(&argc, argv);
1975    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA);
1976    glutInitWindowSize(NanoVis::winWidth, NanoVis::winHeight);
1977    glutInitWindowPosition(10, 10);
1978    NanoVis::renderWindow = glutCreateWindow("nanovis");
1979    glutIdleFunc(NanoVis::idle);
1980
1981    glutDisplayFunc(NanoVis::render);
1982    glutReshapeFunc(NanoVis::resizeOffscreenBuffer);
1983
1984    while (1) {
1985        static struct option long_options[] = {
1986            {"infile",  required_argument, NULL, 0},
1987            {"path",    required_argument, NULL, 2},
1988            {"debug",   no_argument,       NULL, 3},
1989            {"record",  required_argument, NULL, 4},
1990            {0, 0, 0, 0}
1991        };
1992        int option_index = 0;
1993        int c;
1994
1995        c = getopt_long(argc, argv, ":dp:i:l:r:", long_options, &option_index);
1996        if (c == -1) {
1997            break;
1998        }
1999        switch (c) {
2000        case '?':
2001            fprintf(stderr, "unknown option -%c\n", optopt);
2002            return 1;
2003        case ':':
2004            if (optopt < 4) {
2005                fprintf(stderr, "argument missing for --%s option\n",
2006                        long_options[optopt].name);
2007            } else {
2008                fprintf(stderr, "argument missing for -%c option\n", optopt);
2009            }
2010            return 1;
2011        case 2:
2012        case 'p':
2013            path = optarg;
2014            break;
2015        case 3:
2016        case 'd':
2017            NanoVis::debugFlag = true;
2018            break;
2019        case 0:
2020        case 'i':
2021            NanoVis::stdin = fopen(optarg, "r");
2022            if (NanoVis::stdin == NULL) {
2023                perror(optarg);
2024                return 2;
2025            }
2026            break;
2027        case 4:
2028        case 'r':
2029            Tcl_DString ds;
2030            char buf[200];
2031
2032            Tcl_DStringInit(&ds);
2033            Tcl_DStringAppend(&ds, optarg, -1);
2034            sprintf(buf, ".%d", getpid());
2035            Tcl_DStringAppend(&ds, buf, -1);
2036            NanoVis::recfile = fopen(Tcl_DStringValue(&ds), "w");
2037            if (NanoVis::recfile == NULL) {
2038                perror(optarg);
2039                return 2;
2040            }
2041            break;
2042        default:
2043            fprintf(stderr,"unknown option '%c'.\n", c);
2044            return 1;
2045        }
2046    }     
2047    if (path == NULL) {
2048        char *p;
2049
2050        // See if we can derive the path from the location of the program.
2051        // Assume program is in the form <path>/bin/nanovis.
2052        path = argv[0];
2053        p = strrchr((char *)path, '/');
2054        if (p != NULL) {
2055            *p = '\0';
2056            p = strrchr((char *)path, '/');
2057        }
2058        if (p == NULL) {
2059            TRACE("path not specified");
2060            return 1;
2061        }
2062        *p = '\0';
2063        newPath = new char[(strlen(path) + 15) * 2 + 1];
2064        sprintf(newPath, "%s/lib/shaders:%s/lib/resources", path, path);
2065        path = newPath;
2066    }
2067
2068    FilePath::getInstance()->setWorkingDirectory(argc, (const char**) argv);
2069
2070#ifdef notdef
2071    signal(SIGPIPE, SIG_IGN);
2072#endif
2073    initService();
2074
2075    NanoVis::init(path);
2076    if (newPath != NULL) {
2077        delete [] newPath;
2078    }
2079    NanoVis::initGL();
2080
2081    NanoVis::interp = initTcl();
2082
2083    NanoVis::resizeOffscreenBuffer(NanoVis::winWidth, NanoVis::winHeight);
2084
2085    glutMainLoop();
2086
2087    exitService(80);
2088}
2089
2090void
2091NanoVis::removeVolume(Volume *volume)
2092{
2093    VolumeHashmap::iterator itr = volumeTable.find(volume->name());
2094    if (itr != volumeTable.end()) {
2095        volumeTable.erase(itr);
2096    }
2097    delete volume;
2098}
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