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glvis.cpp
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glvis.cpp
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// Copyright (c) 2010-2022, Lawrence Livermore National Security, LLC. Produced
// at the Lawrence Livermore National Laboratory. All Rights reserved. See files
// LICENSE and NOTICE for details. LLNL-CODE-443271.
//
// This file is part of the GLVis visualization tool and library. For more
// information and source code availability see https://glvis.org.
//
// GLVis is free software; you can redistribute it and/or modify it under the
// terms of the BSD-3 license. We welcome feedback and contributions, see file
// CONTRIBUTING.md for details.
// GLVis - an OpenGL visualization server based on the MFEM library
#include <limits>
#include <iostream>
#include <fstream>
#include <string>
#include <cstdio>
#include <cstring>
#include <ctime>
// SDL may redefine main() as SDL_main() ostensibly to ease portability.
// (WinMain() instead of main() is used as the entry point in a non-console
// Windows program.)
//
// We must instead define SDL_MAIN_HANDLED so that SDL doesn't do this
// substitution, since we need a console to accept certain user input from
// stdin.
#ifdef _WIN32
#define SDL_MAIN_HANDLED
#endif
#include "mfem.hpp"
#include "lib/palettes.hpp"
#include "lib/visual.hpp"
#include "lib/stream_reader.hpp"
using namespace std;
using namespace mfem;
const char *string_none = "(none)";
const char *string_default = "(default)";
// Global variables for command line arguments
const char *mesh_file = string_none;
const char *sol_file = string_none;
const char *vec_sol_file = string_none;
const char *gfunc_file = string_none;
const char *arg_keys = string_none;
int pad_digits = 6;
int gf_component = -1;
bool keep_attr = false;
int window_x = 0; // not a command line option
int window_y = 0; // not a command line option
int window_w = 400;
int window_h = 350;
const char *window_title = string_default;
const char *c_plot_caption = string_none;
thread_local string plot_caption;
thread_local string extra_caption;
bool secure = socketstream::secure_default;
// Global variables
int input = 1;
thread_local StreamState stream_state;
thread_local VisualizationSceneScalarData *vs = NULL;
extern thread_local GLVisCommand* glvis_command;
thread_local communication_thread *comm_thread = NULL;
thread_local GeometryRefiner GLVisGeometryRefiner;
const char *window_titles[] = { "GLVis [scalar data]",
"GLVis [vector data]", "GLVis [mesh]"
};
istream *script = NULL;
int scr_running = 0;
int scr_level = 0;
Vector *init_nodes = NULL;
double scr_min_val, scr_max_val;
extern char **environ;
using StreamCollection = vector<unique_ptr<istream>>;
void PrintSampleUsage(ostream &out);
// read the mesh and the solution from a file
void ReadSerial(StreamState& state);
// choose grid function component and set the input flag
void SetGridFunction(StreamState& state);
// read the mesh and the solution from multiple files
void ReadParallel(int np, StreamState& state);
int ReadParMeshAndGridFunction(int np, const char *mesh_prefix,
const char *sol_prefix, StreamState& state,
int keep_attr);
int ReadInputStreams(StreamState& state, const StreamCollection& input_streams);
// Visualize the data in the global variables mesh, sol/grid_f, etc
// 0 - scalar data, 1 - vector data, 2 - mesh only, (-1) - unknown
bool GLVisInitVis(int field_type, StreamCollection input_streams)
{
if (field_type < 0 || field_type > 2)
{
return false;
}
const char *win_title = (window_title == string_default) ?
window_titles[field_type] : window_title;
if (InitVisualization(win_title, window_x, window_y, window_w, window_h))
{
cerr << "Initializing the visualization failed." << endl;
return false;
}
if (input_streams.size() > 0)
{
GetAppWindow()->setOnKeyDown(SDLK_SPACE, ThreadsPauseFunc);
glvis_command = new GLVisCommand(&vs, stream_state, &keep_attr);
comm_thread = new communication_thread(std::move(input_streams), glvis_command);
}
double mesh_range = -1.0;
if (field_type == 0 || field_type == 2)
{
if (stream_state.grid_f)
{
stream_state.grid_f->GetNodalValues(stream_state.sol);
}
if (stream_state.mesh->SpaceDimension() == 2)
{
VisualizationSceneSolution * vss;
if (stream_state.normals.Size() > 0)
{
vs = vss = new VisualizationSceneSolution(*stream_state.mesh, stream_state.sol,
&stream_state.normals);
}
else
{
vs = vss = new VisualizationSceneSolution(*stream_state.mesh, stream_state.sol);
}
if (stream_state.grid_f)
{
vss->SetGridFunction(*stream_state.grid_f);
}
if (field_type == 2)
{
vs->OrthogonalProjection = 1;
vs->SetLight(false);
vs->Zoom(1.8);
// Use the 'bone' palette when visualizing a 2D mesh only (otherwise
// the 'jet-like' palette is used in 2D, see vssolution.cpp).
vs->palette.SetIndex(4);
}
}
else if (stream_state.mesh->SpaceDimension() == 3)
{
VisualizationSceneSolution3d * vss;
vs = vss = new VisualizationSceneSolution3d(*stream_state.mesh,
stream_state.sol);
if (stream_state.grid_f)
{
vss->SetGridFunction(stream_state.grid_f.get());
}
if (field_type == 2)
{
if (stream_state.mesh->Dimension() == 3)
{
// Use the 'white' palette when visualizing a 3D volume mesh only
vss->palette.SetIndex(11);
vss->SetLightMatIdx(4);
}
else
{
// Use the 'bone' palette when visualizing a surface mesh only
vss->palette.SetIndex(4);
}
// Otherwise, the 'vivid' palette is used in 3D see vssolution3d.cpp
vss->ToggleDrawAxes();
vss->ToggleDrawMesh();
}
}
if (field_type == 2)
{
if (stream_state.grid_f)
{
mesh_range = stream_state.grid_f->Max() + 1.0;
}
else
{
mesh_range = stream_state.sol.Max() + 1.0;
}
}
}
else if (field_type == 1)
{
if (stream_state.mesh->SpaceDimension() == 2)
{
if (stream_state.grid_f)
{
vs = new VisualizationSceneVector(*stream_state.grid_f);
}
else
{
vs = new VisualizationSceneVector(*stream_state.mesh, stream_state.solu,
stream_state.solv);
}
}
else if (stream_state.mesh->SpaceDimension() == 3)
{
if (stream_state.grid_f)
{
stream_state.grid_f
= ProjectVectorFEGridFunction(std::move(stream_state.grid_f));
vs = new VisualizationSceneVector3d(*stream_state.grid_f);
}
else
{
vs = new VisualizationSceneVector3d(*stream_state.mesh, stream_state.solu,
stream_state.solv, stream_state.solw);
}
}
}
if (vs)
{
// increase the refinement factors if visualizing a GridFunction
if (stream_state.grid_f)
{
vs->AutoRefine();
vs->SetShading(2, true);
}
if (mesh_range > 0.0)
{
vs->SetValueRange(-mesh_range, mesh_range);
vs->SetAutoscale(0);
}
if (stream_state.mesh->SpaceDimension() == 2 && field_type == 2)
{
SetVisualizationScene(vs, 2, stream_state.keys.c_str());
}
else
{
SetVisualizationScene(vs, 3, stream_state.keys.c_str());
}
}
return true;
}
void GLVisStartVis()
{
RunVisualization(); // deletes vs
vs = NULL;
if (glvis_command)
{
glvis_command->Terminate();
delete comm_thread;
delete glvis_command;
glvis_command = NULL;
}
cout << "GLVis window closed." << endl;
}
int ScriptReadSolution(istream &scr, StreamState& state)
{
string mword,sword;
cout << "Script: solution: " << flush;
// read the mesh
scr >> ws >> mword; // mesh filename (can't contain spaces)
cout << "mesh: " << mword << "; " << flush;
named_ifgzstream imesh(mword.c_str());
if (!imesh)
{
cout << "Can not open mesh file: " << mword << endl;
return 1;
}
state.mesh.reset(new Mesh(imesh, 1, 0, state.fix_elem_orient));
// read the solution (GridFunction)
scr >> ws >> sword;
if (sword == mword) // mesh and solution in the same file
{
cout << "solution: " << mword << endl;
state.grid_f.reset(new GridFunction(state.mesh.get(), imesh));
}
else
{
cout << "solution: " << sword << endl;
ifgzstream isol(sword.c_str());
if (!isol)
{
cout << "Can not open solution file: " << sword << endl;
return 2;
}
state.grid_f.reset(new GridFunction(state.mesh.get(), isol));
}
state.Extrude1DMeshAndSolution();
return 0;
}
int ScriptReadParSolution(istream &scr, StreamState& state)
{
int np, scr_keep_attr, err_read;
string mesh_prefix, sol_prefix;
cout << "Script: psolution: " << flush;
// read number of processors
scr >> np;
cout << "# processors: " << np << "; " << flush;
// read the mesh prefix
scr >> ws >> mesh_prefix; // mesh prefix (can't contain spaces)
cout << "mesh prefix: " << mesh_prefix << "; " << flush;
scr >> ws >> scr_keep_attr;
if (scr_keep_attr)
{
cout << "(real attributes); " << flush;
}
else
{
cout << "(processor attributes); " << flush;
}
// read the solution prefix
scr >> ws >> sol_prefix;
cout << "solution prefix: " << sol_prefix << endl;
err_read = ReadParMeshAndGridFunction(np, mesh_prefix.c_str(),
sol_prefix.c_str(), state, scr_keep_attr);
if (!err_read)
{
state.Extrude1DMeshAndSolution();
}
return err_read;
}
int ScriptReadDisplMesh(istream &scr, StreamState& state)
{
StreamState meshstate;
string word;
cout << "Script: mesh: " << flush;
scr >> ws >> word;
{
named_ifgzstream imesh(word.c_str());
if (!imesh)
{
cout << "Can not open mesh file: " << word << endl;
return 1;
}
cout << word << endl;
meshstate.mesh.reset(new Mesh(imesh, 1, 0, state.fix_elem_orient));
}
meshstate.Extrude1DMeshAndSolution();
Mesh* const m = meshstate.mesh.get();
if (init_nodes == NULL)
{
init_nodes = new Vector;
meshstate.mesh->GetNodes(*init_nodes);
state.mesh = NULL;
state.grid_f = NULL;
}
else
{
FiniteElementCollection *vfec = NULL;
FiniteElementSpace *vfes;
vfes = (FiniteElementSpace *)m->GetNodalFESpace();
if (vfes == NULL)
{
vfec = new LinearFECollection;
vfes = new FiniteElementSpace(m, vfec, m->SpaceDimension());
}
meshstate.grid_f.reset(new GridFunction(vfes));
GridFunction * const g = meshstate.grid_f.get();
if (vfec)
{
g->MakeOwner(vfec);
}
m->GetNodes(*g);
if (g->Size() == init_nodes->Size())
{
subtract(*init_nodes, *g, *g);
}
else
{
cout << "Script: incompatible meshes!" << endl;
*g = 0.0;
}
state.mesh = std::move(meshstate.mesh);
state.grid_f = std::move(meshstate.grid_f);
}
return 0;
}
void ExecuteScriptCommand()
{
if (!script)
{
cout << "No script stream defined! (Bug?)" << endl;
return;
}
istream &scr = *script;
string word;
int done_one_command = 0;
while (!done_one_command)
{
scr >> ws;
if (!scr.good())
{
cout << "End of script." << endl;
scr_level = 0;
return;
}
if (scr.peek() == '#')
{
getline(scr, word);
continue;
}
scr >> word;
if (word == "{")
{
scr_level++;
}
else if (word == "}")
{
scr_level--;
if (scr_level < 0)
{
scr_level = 0;
}
}
else if (word == "solution" || word == "mesh" || word == "psolution")
{
StreamState new_state;
if (word == "solution")
{
if (ScriptReadSolution(scr, new_state))
{
done_one_command = 1;
continue;
}
}
else if (word == "mesh")
{
if (ScriptReadDisplMesh(scr, new_state))
{
done_one_command = 1;
continue;
}
if (new_state.mesh == NULL)
{
cout << "Script: unexpected 'mesh' command!" << endl;
done_one_command = 1;
continue;
}
}
else if (word == "psolution")
{
if (ScriptReadParSolution(scr, new_state))
{
done_one_command = 1;
continue;
}
}
if (stream_state.SetNewMeshAndSolution(std::move(new_state), vs))
{
MyExpose();
}
else
{
cout << "Different type of mesh / solution." << endl;
}
}
else if (word == "screenshot")
{
scr >> ws >> word;
cout << "Script: screenshot: " << flush;
if (Screenshot(word.c_str(), true))
{
cout << "Screenshot(" << word << ") failed." << endl;
done_one_command = 1;
continue;
}
cout << "-> " << word << endl;
if (scr_min_val > vs->GetMinV())
{
scr_min_val = vs->GetMinV();
}
if (scr_max_val < vs->GetMaxV())
{
scr_max_val = vs->GetMaxV();
}
}
else if (word == "viewcenter")
{
scr >> vs->ViewCenterX >> vs->ViewCenterY;
cout << "Script: viewcenter: "
<< vs->ViewCenterX << ' ' << vs->ViewCenterY << endl;
MyExpose();
}
else if (word == "perspective")
{
scr >> ws >> word;
cout << "Script: perspective: " << word;
if (word == "off")
{
vs->OrthogonalProjection = 1;
}
else if (word == "on")
{
vs->OrthogonalProjection = 0;
}
else
{
cout << '?';
}
cout << endl;
MyExpose();
}
else if (word == "light")
{
scr >> ws >> word;
cout << "Script: light: " << word;
if (word == "off")
{
vs->SetLight(false);
}
else if (word == "on")
{
vs->SetLight(true);
}
else
{
cout << '?';
}
cout << endl;
MyExpose();
}
else if (word == "view")
{
double theta, phi;
scr >> theta >> phi;
cout << "Script: view: " << theta << ' ' << phi << endl;
vs->SetView(theta, phi);
MyExpose();
}
else if (word == "zoom")
{
double factor;
scr >> factor;
cout << "Script: zoom: " << factor << endl;
vs->Zoom(factor);
MyExpose();
}
else if (word == "shading")
{
scr >> ws >> word;
cout << "Script: shading: " << flush;
int s = -1;
if (word == "flat")
{
s = 0;
}
else if (word == "smooth")
{
s = 1;
}
else if (word == "cool")
{
s = 2;
}
if (s != -1)
{
vs->SetShading(s, false);
cout << word << endl;
MyExpose();
}
else
{
cout << word << " ?" << endl;
}
}
else if (word == "subdivisions")
{
int t, b;
scr >> t >> b;
cout << "Script: subdivisions: " << flush;
vs->SetRefineFactors(t, b);
cout << t << ' ' << b << endl;
MyExpose();
}
else if (word == "valuerange")
{
double min, max;
scr >> min >> max;
cout << "Script: valuerange: " << flush;
vs->SetValueRange(min, max);
cout << min << ' ' << max << endl;
MyExpose();
}
else if (word == "autoscale")
{
scr >> ws >> word;
cout << "Script: autoscale: " << word;
if (word == "off")
{
vs->SetAutoscale(0);
}
else if (word == "on")
{
vs->SetAutoscale(1);
}
else if (word == "value")
{
vs->SetAutoscale(2);
}
else if (word == "mesh")
{
vs->SetAutoscale(3);
}
else
{
cout << '?';
}
cout << endl;
}
else if (word == "window")
{
scr >> window_x >> window_y >> window_w >> window_h;
cout << "Script: window: " << window_x << ' ' << window_y
<< ' ' << window_w << ' ' << window_h << endl;
MoveResizeWindow(window_x, window_y, window_w, window_h);
MyExpose();
}
else if (word == "keys")
{
scr >> stream_state.keys;
cout << "Script: keys: '" << stream_state.keys << "'" << endl;
// SendKeySequence(keys.c_str());
CallKeySequence(stream_state.keys.c_str());
MyExpose();
}
else if (word == "palette")
{
int pal;
scr >> pal;
cout << "Script: palette: " << pal << endl;
vs->palette.SetIndex(pal-1);
MyExpose();
}
else if (word == "palette_repeat")
{
int rpt_times;
scr >> rpt_times;
cout << "Script: palette_repeat: " << rpt_times << endl;
vs->palette.SetRepeatTimes(rpt_times);
vs->palette.Init();
MyExpose();
}
else if (word == "toggle_attributes")
{
Array<int> attr_list;
cout << "Script: toggle_attributes:";
for (scr >> ws; scr.peek() != ';'; scr >> ws)
{
attr_list.Append(0);
scr >> attr_list.Last();
if (attr_list.Size() <= 256)
{
cout << ' ' << attr_list.Last();
}
else if (attr_list.Size() == 257)
{
cout << " ... " << flush;
}
}
scr.get(); // read the end symbol: ';'
cout << endl;
vs->ToggleAttributes(attr_list);
MyExpose();
}
else if (word == "rotmat")
{
cout << "Script: rotmat:";
for (int i = 0; i < 16; i++)
{
scr >> vs->rotmat[i/4][i%4];
cout << ' ' << vs->rotmat[i/4][i%4];
}
cout << endl;
MyExpose();
}
else if (word == "camera")
{
double cam[9];
cout << "Script: camera:";
for (int i = 0; i < 9; i++)
{
scr >> cam[i];
cout << ' ' << cam[i];
}
cout << endl;
vs->cam.Set(cam);
MyExpose();
}
else if (word == "scale")
{
double scale;
cout << "Script: scale:";
scr >> scale;
cout << ' ' << scale;
cout << endl;
vs->Scale(scale);
MyExpose();
}
else if (word == "translate")
{
double x, y, z;
cout << "Script: translate:";
scr >> x >> y >> z;
cout << ' ' << x << ' ' << y << ' ' << z;
cout << endl;
vs->Translate(x, y, z);
MyExpose();
}
else if (word == "plot_caption")
{
char delim;
scr >> ws >> delim;
getline(scr, plot_caption, delim);
vs->PrepareCaption(); // turn on or off the caption
MyExpose();
}
else
{
cout << "Unknown command in script: " << word << endl;
}
done_one_command = 1;
}
}
void ScriptControl();
void ScriptIdleFunc()
{
ExecuteScriptCommand();
if (scr_level == 0)
{
ScriptControl();
}
}
void ScriptControl()
{
if (scr_running)
{
scr_running = 0;
RemoveIdleFunc(ScriptIdleFunc);
}
else
{
scr_running = 1;
AddIdleFunc(ScriptIdleFunc);
}
}
void PlayScript(istream &scr)
{
string word;
scr_min_val = numeric_limits<double>::infinity();
scr_max_val = -scr_min_val;
// read initializing commands
while (1)
{
scr >> ws;
if (!scr.good())
{
cout << "Error in script" << endl;
return;
}
if (scr.peek() == '#')
{
getline(scr, word);
continue;
}
scr >> word;
if (word == "window")
{
scr >> window_x >> window_y >> window_w >> window_h;
}
else if (word == "solution")
{
if (ScriptReadSolution(scr, stream_state))
{
return;
}
// start the visualization
break;
}
else if (word == "psolution")
{
if (ScriptReadParSolution(scr, stream_state))
{
return;
}
// start the visualization
break;
}
else if (word == "mesh")
{
if (ScriptReadDisplMesh(scr, stream_state))
{
return;
}
if (stream_state.mesh)
{
break;
}
}
else
{
cout << "Unknown command in script: " << word << endl;
}
}
scr_level = scr_running = 0;
script = &scr;
stream_state.keys.clear();
std::thread worker_thread
{
[&](StreamState local_state)
{
// set the thread-local StreamState
stream_state = std::move(local_state);
if (c_plot_caption != string_none)
{
plot_caption = c_plot_caption;
}
if (GLVisInitVis((stream_state.grid_f->VectorDim() == 1) ? 0 : 1, {}))
{
GetAppWindow()->setOnKeyDown(SDLK_SPACE, ScriptControl);
GLVisStartVis();
}
},
std::move(stream_state)
};
SDLMainLoop();
worker_thread.join();
delete init_nodes; init_nodes = NULL;
cout << "Script: min_val = " << scr_min_val
<< ", max_val = " << scr_max_val << endl;
script = NULL;
}
struct Session
{
StreamCollection input_streams;
StreamState state;
int ft = -1;
std::thread handler;
Session(bool fix_elem_orient,
bool save_coloring)
{
state.fix_elem_orient = fix_elem_orient;
state.save_coloring = save_coloring;
}
Session(int other_ft, StreamState other_state)
: state(std::move(other_state))
, ft(other_ft)
{ }
~Session() = default;
Session(Session&& from) = default;
Session& operator= (Session&& from) = default;
void StartSession()
{
auto funcThread =
[](StreamState thread_state, int ftype, StreamCollection is)
{
// Set thread-local stream state
stream_state = std::move(thread_state);
if (c_plot_caption != string_none)
{
plot_caption = c_plot_caption;
}
if (GLVisInitVis(ftype, std::move(is)))
{
GLVisStartVis();
}
};
handler = std::thread {funcThread,
std::move(state), ft, std::move(input_streams)};
handler.detach();
}
bool StartSavedSession(std::string stream_file)
{
unique_ptr<ifstream> ifs(new ifstream(stream_file));
if (!(*ifs))
{
cout << "Can not open stream file: " << stream_file << endl;
return false;
}
string data_type;
*ifs >> data_type >> ws;
ft = state.ReadStream(*ifs, data_type);
input_streams.emplace_back(std::move(ifs));
StartSession();
return true;
}
};
void GLVisServer(int portnum, bool save_stream, bool fix_elem_orient,
bool save_coloring)
{
std::vector<Session> current_sessions;
string data_type;
int viscount = 0;
unsigned int nproc = 1, proc = 0;
#ifdef MFEM_USE_GNUTLS
unique_ptr<GnuTLS_global_state> state;
unique_ptr<GnuTLS_session_params> params;
if (secure)
{
state.reset(new GnuTLS_global_state);
// state->set_log_level(1000);
string home_dir(getenv("HOME"));
string server_dir = home_dir + "/.config/glvis/server/";
#ifndef MFEM_USE_GNUTLS_X509
string pubkey = server_dir + "pubring.gpg";
string privkey = server_dir + "secring.gpg";
string trustedkeys = server_dir + "trusted-clients.gpg";
#else
string pubkey = server_dir + "cert.pem";
string privkey = server_dir + "key.pem";
string trustedkeys = server_dir + "trusted-clients.pem";
#endif
params.reset(new GnuTLS_session_params(
*state, pubkey.c_str(), privkey.c_str(),
trustedkeys.c_str(), GNUTLS_SERVER));
if (!params->status.good())
{
cout << " public key = " << pubkey << '\n'
<< " private key = " << privkey << '\n'
<< " trusted keys = " << trustedkeys << endl;
cout << "Error setting GLVis server parameters.\n"
"Generate your GLVis keys with:"
" bash glvis-keygen.sh [\"Your Name\"] [\"Your Email\"]"
<< endl;
return;
}
}
#endif
const int backlog = 128;
socketserver server(portnum, backlog);
if (server.good())
{
cout << "Waiting for data on port " << portnum << " ..." << endl;
}
else
{
cout << "Server already running on port " << portnum << ".\n" << endl;
exit(2);
}
while (1)
{