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Stuart Buchanan:

Browse source 
- Provide a Nasal interface to display simple text messages on the screen
  like the ATC display. In fact, I copied the code from the ATCDisplay.cxx
  and simply shifted it further down the screen.


Erik:

TODO: Integrate the two pieces of code.
This commit is contained in:
ehofman 2006-01-06 09:50:58 +00:00
parent 0b3164c312
commit 0e16419f0d
8 changed files with 379 additions and 4 deletions
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9
src/Main/fg_init.cxx
View file

@ -102,6 +102,7 @@
#include <Scenery/scenery.hxx>
#include <Scenery/tilemgr.hxx>
#include <Scripting/NasalSys.hxx>
#include <Scripting/NasalDisplay.hxx>
#include <Sound/fg_fx.hxx>
#include <Sound/beacon.hxx>
#include <Sound/morse.hxx>
@ -1758,6 +1759,14 @@ bool fgInitSubsystems() {
globals->get_io()->bind();
////////////////////////////////////////////////////////////////////
// Initialise Nasal display system
////////////////////////////////////////////////////////////////////
SG_LOG(SG_GENERAL, SG_INFO, " Nasal Display");
globals->set_Nasal_display(new FGNasalDisplay);
globals->get_Nasal_display()->init();
////////////////////////////////////////////////////////////////////
// Add a new 2D panel.
////////////////////////////////////////////////////////////////////

7
src/Main/globals.hxx
View file

@ -73,6 +73,7 @@ class FGControls;
class FGFlightPlanDispatcher;
class FGIO;
class FGNavList;
class FGNasalDisplay;
class FGTACANList;
class FGFixList;
class FGLight;
@ -209,6 +210,9 @@ private:
FGNavList *carrierlist;
FGTACANList *channellist;
FGFixList *fixlist;
// Scripting display
FGNasalDisplay * Nasal_display;
#ifdef FG_MPLAYER_AS
@ -358,6 +362,9 @@ public:
inline void set_tile_mgr ( FGTileMgr *t ) { tile_mgr = t; }
inline FGIO* get_io() const { return io; }
inline FGNasalDisplay *get_Nasal_display() const { return Nasal_display; }
inline void set_Nasal_display( FGNasalDisplay *d ) {Nasal_display = d; }
inline FGNavList *get_navlist() const { return navlist; }
inline void set_navlist( FGNavList *n ) { navlist = n; }

4
src/Main/renderer.cxx
View file

@ -66,6 +66,7 @@
#include <Model/acmodel.hxx>
#include <Scenery/scenery.hxx>
#include <Scenery/tilemgr.hxx>
#include <Scripting/NasalDisplay.hxx>
#include <ATC/ATCdisplay.hxx>
#include <GUI/new_gui.hxx>
@ -746,6 +747,9 @@ FGRenderer::update( bool refresh_camera_settings ) {
if((fgGetBool("/sim/atc/enabled")) || (fgGetBool("/sim/ai-traffic/enabled")))
globals->get_ATC_display()->update(delta_time_sec);
// Update any messages from the Nasal System
globals->get_Nasal_display()->update(delta_time_sec);
// update the panel subsystem
if ( globals->get_current_panel() != NULL ) {
globals->get_current_panel()->update(delta_time_sec);

6
src/Scripting/Makefile.am
View file

@ -1,6 +1,8 @@
noinst_LIBRARIES = libScripting.a
libScripting_a_SOURCES = NasalSys.cxx NasalSys.hxx nasal-props.cxx
# libScripting_a_SOURCES = scriptmgr.cxx scriptmgr.hxx NasalSys.cxx NasalSys.hxx
libScripting_a_SOURCES = \
NasalSys.cxx NasalSys.hxx \
NasalDisplay.cxx NasalDisplay.hxx \
nasal-props.cxx
INCLUDES = -I$(top_srcdir) -I$(top_srcdir)/src

239
src/Scripting/NasalDisplay.cxx Normal file
View file

@ -0,0 +1,239 @@
// NasalDisplay.cxx - routines to display Nasal output
//
// Written by David Luff, started October 2001.
//
// Copyright (C) 2001 David C Luff - david.luff@nottingham.ac.uk
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef HAVE_WINDOWS_H
# include <windows.h>
#endif
#include <simgear/compiler.h>
#include SG_GLU_H
#include <simgear/props/props.hxx>
#include <Include/general.hxx>
#include <Main/fg_props.hxx>
#include <GUI/gui.h>
#include "NasalDisplay.hxx"
// Constructor
FGNasalDisplay::FGNasalDisplay() {
rep_msg = false;
change_msg_flag = false;
dsp_offset1 = 0.0;
dsp_offset2 = 0.0;
}
// Destructor
FGNasalDisplay::~FGNasalDisplay() {
}
void FGNasalDisplay::init() {
}
void FGNasalDisplay::bind() {
}
void FGNasalDisplay::unbind() {
}
// update - this actually draws the visuals and should be called from the main Flightgear rendering loop.
void FGNasalDisplay::update(double dt) {
// These strings are used for temporary storage of the transmission string in order
// that the string we view only changes when the next repetition starts scrolling
// even though the master string (rep_msg_str) may change at any time.
static string msg1 = "";
static string msg2 = "";
if( rep_msg || msgList.size() ) {
SGPropertyNode *xsize_node = fgGetNode("/sim/startup/xsize");
SGPropertyNode *ysize_node = fgGetNode("/sim/startup/ysize");
int iwidth = xsize_node->getIntValue();
int iheight = ysize_node->getIntValue();
glMatrixMode( GL_PROJECTION );
glPushMatrix();
glLoadIdentity();
gluOrtho2D( 0, iwidth, 0, iheight );
glMatrixMode( GL_MODELVIEW );
glPushMatrix();
glLoadIdentity();
glDisable( GL_DEPTH_TEST );
glDisable( GL_LIGHTING );
glColor3f( 0.9, 0.4, 0.2 );
float fps = general.get_frame_rate();
if(rep_msg) {
//cout << "dsp_offset1 = " << dsp_offset1 << " dsp_offset2 = " << dsp_offset2 << endl;
if(dsp_offset1 == 0) {
msg1 = rep_msg_str;
}
if(dsp_offset2 == 0) {
msg2 = rep_msg_str;
}
// Check for the situation where one offset is negative and the message is changed
if(change_msg_flag) {
if(dsp_offset1 < 0) {
msg1 = rep_msg_str;
} else if(dsp_offset2 < 0) {
msg2 = rep_msg_str;
}
change_msg_flag = false;
}
// guiFnt.drawString( rep_msg_str.c_str(),
// int(iwidth - guiFnt.getStringWidth(buf) - 10 - (int)dsp_offset),
// (iheight - 20) );
guiFnt.drawString( msg1.c_str(),
int(iwidth - 10 - dsp_offset1),
(iheight - 20) );
guiFnt.drawString( msg2.c_str(),
int(iwidth - 10 - dsp_offset2),
(iheight - 20) );
// Try to scroll at a frame rate independent speed
// 40 pixels/second looks about right for now
if(dsp_offset1 >= dsp_offset2) {
dsp_offset1+=(40.0/fps);
dsp_offset2 = dsp_offset1 - (rep_msg_str.size() * 10) - 100;
if(dsp_offset1 > (iwidth + (rep_msg_str.size() * 10)))
dsp_offset1 = 0;
} else {
dsp_offset2+=(40.0/fps);
dsp_offset1 = dsp_offset2 - (rep_msg_str.size() * 10) - 100;
if(dsp_offset2 > (iwidth + (rep_msg_str.size() * 10)))
dsp_offset2 = 0;
}
}
if(msgList.size()) {
//cout << "Attempting to render single message\n";
// We have at least one non-repeating message to process
if(fgGetBool("/ATC/display/scroll-single-messages")) { // Scroll single messages across the screen.
msgList_itr = msgList.begin();
int i = 0;
while(msgList_itr != msgList.end()) {
nasalMessage m = *msgList_itr;
//cout << "m.counter = " << m.counter << '\n';
if(m.dsp_offset > (iwidth + (m.msg.size() * 10))) {
//cout << "Stopping single message\n";
msgList_itr = msgList.erase(msgList_itr);
} else if(m.counter > m.start_count) {
//cout << "Drawing single message\n";
guiFnt.drawString( m.msg.c_str(),
int(iwidth - 10 - m.dsp_offset),
(iheight - 80) );
m.counter += dt;
m.dsp_offset += (80.0/fps);
msgList[i] = m;
++msgList_itr;
++i;
} else {
//cout << "Not yet started single message\n";
m.counter += dt;
msgList[i] = m;
++msgList_itr;
++i;
}
}
} else { // Display single messages for a short period of time.
msgList_itr = msgList.begin();
int i = 0;
while(msgList_itr != msgList.end()) {
nasalMessage m = *msgList_itr;
//cout << "m.counter = " << m.counter << '\n';
if(m.counter > m.stop_count) {
//cout << "Stopping single message\n";
msgList_itr = msgList.erase(msgList_itr);
} else if(m.counter > m.start_count) {
int pin = (((int)m.msg.size() * 8) >= iwidth ? 5 : (iwidth - (m.msg.size() * 8))/2);
//cout << m.msg << '\n';
//cout << "pin = " << pin << ", iwidth = " << iwidth << ", msg.size = " << m.msg.size() << '\n';
guiFnt.drawString( m.msg.c_str(), pin, (iheight - 80) );
m.counter += dt;
msgList[i] = m;
++msgList_itr;
++i;
} else {
m.counter += dt;
msgList[i] = m;
++msgList_itr;
++i;
}
}
}
}
glEnable( GL_DEPTH_TEST );
glEnable( GL_LIGHTING );
glMatrixMode( GL_PROJECTION );
glPopMatrix();
glMatrixMode( GL_MODELVIEW );
glPopMatrix();
}
}
void FGNasalDisplay::RegisterSingleMessage(const string& msg, double delay) {
//cout << msg << '\n';
nasalMessage m;
m.msg = msg;
m.repeating = false;
m.counter = 0.0;
m.start_count = delay;
m.stop_count = m.start_count + 5.0; // Display for 5ish seconds for now - this might have to change eg. be related to length of message in future
//cout << "m.stop_count = " << m.stop_count << '\n';
m.id = 0;
m.dsp_offset = 0.0;
msgList.push_back(m);
//cout << "Single message registered\n";
}
void FGNasalDisplay::RegisterRepeatingMessage(const string& msg) {
rep_msg = true;
rep_msg_str = msg;
return;
}
void FGNasalDisplay::ChangeRepeatingMessage(const string& newmsg) {
rep_msg_str = newmsg;
change_msg_flag = true;
return;
}
void FGNasalDisplay::CancelRepeatingMessage() {
rep_msg = false;
rep_msg_str = "";
dsp_offset1 = 0;
dsp_offset2 = 0;
return;
}

93
src/Scripting/NasalDisplay.hxx Normal file
View file

@ -0,0 +1,93 @@
// NasalDisplay.hxx - class to manage the graphical display of Nasal messages.
// - mainly copied from ATCDisplay.hxx
//
// Written by David Luff, started October 2001.
//
// Copyright (C) 2001 David C Luff - david.luff@nottingham.ac.uk
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#ifndef _FG_NASAL_DISPLAY_HXX
#define _FG_NASAL_DISPLAY_HXX
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <simgear/structure/subsystem_mgr.hxx>
#include <vector>
#include <string>
SG_USING_STD(vector);
SG_USING_STD(string);
struct nasalMessage {
string msg;
bool repeating;
double counter; // count of how many seconds since the message was registered
double start_count; // value of counter at which display should start (seconds)
double stop_count; // value of counter at which display should stop (seconds)
int id;
double dsp_offset;
};
// ASSUMPTION - with two radios the list won't be long so we don't need to map the id's
typedef vector<nasalMessage> nasalMessageList;
typedef nasalMessageList::iterator nasalMessageListIterator;
class FGNasalDisplay : public SGSubsystem
{
private:
bool rep_msg; // Flag to indicate there is a repeating transmission to display
bool change_msg_flag; // Flag to indicate that the repeating message has changed
double dsp_offset1; // Used to set the correct position of scrolling display
double dsp_offset2;
string rep_msg_str; // The repeating transmission to play
nasalMessageList msgList;
nasalMessageListIterator msgList_itr;
public:
FGNasalDisplay();
~FGNasalDisplay();
void init();
void bind();
void unbind();
// Display any registered messages
void update(double dt);
// Register a single message for display after a delay of delay seconds
// Will automatically stop displaying after a suitable interval.
void RegisterSingleMessage(const string& msg, double delay = 0.0);
// For now we will assume only one repeating message at once
// This is not really robust
// Register a continuously repeating message
void RegisterRepeatingMessage(const string& msg);
// Change a repeating message - assume that the message changes after the string has finished for now
void ChangeRepeatingMessage(const string& newmsg);
// Cancel the current repeating message
void CancelRepeatingMessage();
};
#endif // _FG_ATC_DISPLAY_HXX

18
src/Scripting/NasalSys.cxx
View file

@ -16,6 +16,7 @@
#include <Main/fg_props.hxx>
#include "NasalSys.hxx"
#include "NasalDisplay.hxx"
// Read and return file contents in a single buffer. Note use of
// stat() to get the file size. This is a win32 function, believe it
@ -287,6 +288,17 @@ static naRef f_rand(naContext c, naRef me, int argc, naRef* args)
return naNum(sg_random());
}
// Wrapper function for screenPrint
static naRef f_screenPrint(naContext c, naRef me, int argc, naRef* args)
{
if(argc != 1 || !naIsString(args[0]))
naRuntimeError(c, "bad arguments to screenPrint()");
naRef lmsg = args[0];
FGNasalSys* nasal = (FGNasalSys*)globals->get_subsystem("nasal");
nasal->screenPrint(naStr_data(lmsg));
return naNil();
}
// Table of extension functions. Terminate with zeros.
static struct { char* name; naCFunction func; } funcs[] = {
{ "getprop", f_getprop },
@ -298,6 +310,7 @@ static struct { char* name; naCFunction func; } funcs[] = {
{ "_cmdarg", f_cmdarg },
{ "_interpolate", f_interpolate },
{ "rand", f_rand },
{ "screenPrint", f_screenPrint },
{ 0, 0 }
};
@ -582,3 +595,8 @@ void FGNasalSys::setListener(int argc, naRef* args)
node->addChangeListener(new FGNasalListener(handler, this, gcSave(handler)));
}
// functions providing access to the NasalDisplay - used to display text directly on the screen
void FGNasalSys::screenPrint(const char* src)
{
globals->get_Nasal_display()->RegisterSingleMessage(src, 0);
}

7
src/Scripting/NasalSys.hxx
View file

@ -47,7 +47,9 @@ public:
void createModule(const char* moduleName, const char* fileName,
const char* src, int len);
void screenPrint(const char* src);
private:
friend class FGNasalScript;
friend class FGNasalListener;
@ -96,7 +98,8 @@ public:
~FGNasalScript() { _nas->gcRelease(_gcKey); }
bool call() {
naCall(_nas->_context, _code, 0, 0, naNil(), naNil());
naRef n = naNil();
naCall(_nas->_context, _code, 0, &n, naNil(), naNil());
return naGetError(_nas->_context) == 0;
}