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flightgear/src/Cockpit/hud.cxx

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// hud.cxx -- hud defines and prototypes
//
// Written by Michele America, started September 1997.
//
// Copyright (C) 1997 Michele F. America - micheleamerica@geocities.com
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
#include <simgear/compiler.h>
#include <simgear/structure/exception.hxx>
#include STL_STRING
#include STL_FSTREAM
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef HAVE_WINDOWS_H
# include <windows.h>
#endif
#ifdef __BORLANDC__
# define exception c_exception
#endif
#include <math.h>
#include <stdlib.h>
#include <stdio.h> // char related functions
#include <string.h> // strcmp()
#include SG_GLU_H
#include <simgear/constants.h>
#include <simgear/debug/logstream.hxx>
#include <simgear/misc/sg_path.hxx>
#include <Aircraft/aircraft.hxx>
//#include <Autopilot/xmlauto.hxx>
#include <GUI/new_gui.hxx> // FGFontCache
#include <Main/globals.hxx>
#include <Scenery/scenery.hxx>
#include "hud.hxx"
static HUD_Properties *HUDprop = 0;
static char units[5];
deque<SGSharedPtr<instr_item> > HUD_deque;
fgTextList HUD_TextList;
fgLineList HUD_LineList;
fgLineList HUD_StippleLineList;
fntRenderer *HUDtext = 0;
fntTexFont *HUD_Font = 0;
float HUD_TextSize = 0;
int HUD_style = 0;
float HUD_matrix[16];
int readHud( istream &input );
int readInstrument ( const SGPropertyNode * node);
static void drawHUD(osg::State*);
static void fgUpdateHUDVirtual(osg::State*);
class locRECT {
public:
RECT rect;
locRECT( UINT left, UINT top, UINT right, UINT bottom);
RECT get_rect(void) { return rect; }
};
locRECT :: locRECT( UINT left, UINT top, UINT right, UINT bottom)
{
rect.left = left;
rect.top = top;
rect.right = right;
rect.bottom = bottom;
}
// #define DEBUG
int readInstrument(const SGPropertyNode * node)
{
static const SGPropertyNode *startup_units_node
= fgGetNode("/sim/startup/units");
instr_item *HIptr;
if ( !strcmp(startup_units_node->getStringValue(), "feet") ) {
strcpy(units, " ft");
} else {
strcpy(units, " m");
}
const SGPropertyNode * ladder_group = node->getNode("ladders");
if (ladder_group != 0) {
int nLadders = ladder_group->nChildren();
for (int j = 0; j < nLadders; j++) {
HIptr = static_cast<instr_item *>(new HudLadder(ladder_group->getChild(j)));
HUD_deque.insert(HUD_deque.begin(), HIptr);
}
}
const SGPropertyNode * card_group = node->getNode("cards");
if (card_group != 0) {
int nCards = card_group->nChildren();
for (int j = 0; j < nCards; j++) {
const char *type = card_group->getChild(j)->getStringValue("type", "gauge");
if (!strcmp(type, "gauge"))
HIptr = static_cast<instr_item *>(new gauge_instr(card_group->getChild(j)));
else if (!strcmp(type, "dial") || !strcmp(type, "tape"))
HIptr = static_cast<instr_item *>(new hud_card(card_group->getChild(j)));
else {
SG_LOG(SG_INPUT, SG_WARN, "HUD: unknown 'card' type: " << type);
continue;
}
HUD_deque.insert(HUD_deque.begin(), HIptr);
}
}
const SGPropertyNode * label_group = node->getNode("labels");
if (label_group != 0) {
int nLabels = label_group->nChildren();
for (int j = 0; j < nLabels; j++) {
HIptr = static_cast<instr_item *>(new instr_label(label_group->getChild(j)));
HUD_deque.insert(HUD_deque.begin(), HIptr);
}
}
const SGPropertyNode * tbi_group = node->getNode("tbis");
if (tbi_group != 0) {
int nTbis = tbi_group->nChildren();
for (int j = 0; j < nTbis; j++) {
HIptr = static_cast<instr_item *>(new fgTBI_instr(tbi_group->getChild(j)));
HUD_deque.insert(HUD_deque.begin(), HIptr);
}
}
const SGPropertyNode * rwy_group = node->getNode("runways");
if (rwy_group != 0) {
int nRwy = rwy_group->nChildren();
for (int j = 0; j < nRwy; j++) {
HIptr = static_cast<instr_item *>(new runway_instr(rwy_group->getChild(j)));
HUD_deque.insert(HUD_deque.begin(), HIptr);
}
}
return 0;
} //end readinstrument
int readHud( istream &input )
{
SGPropertyNode root;
try {
readProperties(input, &root);
} catch (const sg_exception &e) {
guiErrorMessage("Error reading HUD: ", e);
return 0;
}
SG_LOG(SG_INPUT, SG_INFO, "Read properties for " <<
root.getStringValue("name"));
if (!root.getNode("depreciated"))
SG_LOG(SG_INPUT, SG_ALERT, "WARNING: use of depreciated old HUD");
HUD_deque.erase( HUD_deque.begin(), HUD_deque.end());
SG_LOG(SG_INPUT, SG_INFO, "Reading Hud instruments");
const SGPropertyNode * instrument_group = root.getChild("instruments");
int nInstruments = instrument_group->nChildren();
for (int i = 0; i < nInstruments; i++) {
const SGPropertyNode * node = instrument_group->getChild(i);
SGPath path( globals->get_fg_root() );
path.append(node->getStringValue("path"));
SG_LOG(SG_INPUT, SG_INFO, "Reading Instrument "
<< node->getName()
<< " from "
<< path.str());
SGPropertyNode root2;
try {
readProperties(path.str(), &root2);
} catch (const sg_exception &e) {
guiErrorMessage("Error reading HUD instrument: ", e);
continue;
}
readInstrument(&root2);
}//for loop(i)
return 0;
}
// fgHUDInit
//
// Constructs a HUD object and then adds in instruments. At the present
// the instruments are hard coded into the routine. Ultimately these need
// to be defined by the aircraft's instrumentation records so that the
// display for a Piper Cub doesn't show the speed range of a North American
// mustange and the engine readouts of a B36!
//
int fgHUDInit( fgAIRCRAFT * /* current_aircraft */ )
{
HUD_style = 1;
SG_LOG( SG_COCKPIT, SG_INFO, "Initializing current aircraft HUD" );
string hud_path =
fgGetString("/sim/hud/path", "Huds/Default/default.xml");
SGPath path(globals->get_fg_root());
path.append(hud_path);
ifstream input(path.c_str());
if (!input.good()) {
SG_LOG(SG_INPUT, SG_ALERT,
"Cannot read Hud configuration from " << path.str());
} else {
readHud(input);
input.close();
}
if ( HUDtext ) {
// this chunk of code is not necessarily thread safe if the
// compiler optimizer reorders these statements. Note that
// "delete ptr" does not set "ptr = NULL". We have to do that
// ourselves.
fntRenderer *tmp = HUDtext;
HUDtext = NULL;
delete tmp;
}
FGFontCache *fc = globals->get_fontcache();
HUD_Font = fc->getTexFont(fgGetString("/sim/hud/font/name", "Helvetica.txf"));
if (!HUD_Font)
throw sg_throwable(string("/sim/hud/font/name is not a texture font"));
HUD_TextSize = fgGetFloat("/sim/hud/font/size", 10);
HUDtext = new fntRenderer();
HUDtext->setFont(HUD_Font);
HUDtext->setPointSize(HUD_TextSize);
HUD_TextList.setFont( HUDtext );
if (!HUDprop)
HUDprop = new HUD_Properties;
return 0; // For now. Later we may use this for an error code.
}
int fgHUDInit2( fgAIRCRAFT * /* current_aircraft */ )
{
HUD_style = 2;
SG_LOG( SG_COCKPIT, SG_INFO, "Initializing current aircraft HUD" );
SGPath path(globals->get_fg_root());
path.append("Huds/Minimal/default.xml");
ifstream input(path.c_str());
if (!input.good()) {
SG_LOG(SG_INPUT, SG_ALERT,
"Cannot read Hud configuration from " << path.str());
} else {
readHud(input);
input.close();
}
if (!HUDprop)
HUDprop = new HUD_Properties;
return 0; // For now. Later we may use this for an error code.
}
//$$$ End - added, Neetha, 28 Nov 2k
// fgUpdateHUD
//
// Performs a once around the list of calls to instruments installed in
// the HUD object with requests for redraw. Kinda. It will when this is
// all C++.
//
void fgUpdateHUD( osg::State* state ) {
static const SGPropertyNode *enable3d_node = fgGetNode("/sim/hud/enable3d");
if ( HUD_style == 1 && enable3d_node->getBoolValue() ) {
fgUpdateHUDVirtual(state);
return;
}
static const float normal_aspect = float(640) / float(480);
// note: aspect_ratio is Y/X
float current_aspect = 1.0f/globals->get_current_view()->get_aspect_ratio();
if ( current_aspect > normal_aspect ) {
float aspect_adjust = current_aspect / normal_aspect;
float adjust = 320.0f*aspect_adjust - 320.0f;
fgUpdateHUD( state, -adjust, 0.0f, 640.0f+adjust, 480.0f );
} else {
float aspect_adjust = normal_aspect / current_aspect;
float adjust = 240.0f*aspect_adjust - 240.0f;
fgUpdateHUD( state, 0.0f, -adjust, 640.0f, 480.0f+adjust );
}
}
void fgUpdateHUDVirtual(osg::State* state)
{
FGViewer* view = globals->get_current_view();
// Standard fgfs projection, with essentially meaningless clip
// planes (we'll map the whole HUD plane to z=-1)
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPerspective(view->get_v_fov(), 1/view->get_aspect_ratio(), 0.1, 10);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
// Standard fgfs view direction computation
float lookat[3];
lookat[0] = -sin(SG_DEGREES_TO_RADIANS * view->getHeadingOffset_deg());
lookat[1] = tan(SG_DEGREES_TO_RADIANS * view->getPitchOffset_deg());
lookat[2] = -cos(SG_DEGREES_TO_RADIANS * view->getHeadingOffset_deg());
if (fabs(lookat[1]) > 9999)
lookat[1] = 9999; // FPU sanity
gluLookAt(0, 0, 0, lookat[0], lookat[1], lookat[2], 0, 1, 0);
// Map the -1:1 square to a 55.0x41.25 degree wide patch at z=1.
// This is the default fgfs field of view, which the HUD files are
// written to assume.
float dx = 0.52056705; // tan(55/2)
float dy = dx * 0.75; // assumes 4:3 aspect ratio
float m[16];
m[0] = dx; m[4] = 0; m[ 8] = 0; m[12] = 0;
m[1] = 0; m[5] = dy; m[ 9] = 0; m[13] = 0;
m[2] = 0; m[6] = 0; m[10] = 1; m[14] = 0;
m[3] = 0; m[7] = 0; m[11] = 0; m[15] = 1;
glMultMatrixf(m);
// Convert the 640x480 "HUD standard" coordinate space to a square
// about the origin in the range [-1:1] at depth of -1
glScalef(1./320, 1./240, 1);
glTranslatef(-320, -240, -1);
// Do the deed
drawHUD(state);
// Clean up our mess
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
void fgUpdateHUD( osg::State* state, GLfloat x_start, GLfloat y_start,
GLfloat x_end, GLfloat y_end )
{
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluOrtho2D(x_start, x_end, y_start, y_end);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
drawHUD(state);
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
void drawHUD(osg::State* state)
{
if ( !HUD_deque.size() ) // Trust everyone, but ALWAYS cut the cards!
return;
HUD_TextList.erase();
HUD_LineList.erase();
// HUD_StippleLineList.erase();
glDisable(GL_DEPTH_TEST);
glDisable(GL_LIGHTING);
static const SGPropertyNode *heading_enabled
= fgGetNode("/autopilot/locks/heading", true);
static const SGPropertyNode *altitude_enabled
= fgGetNode("/autopilot/locks/altitude", true);
static char hud_hdg_text[256];
static char hud_wp0_text[256];
static char hud_wp1_text[256];
static char hud_wp2_text[256];
static char hud_alt_text[256];
glEnable(GL_BLEND);
if (HUDprop->isTransparent())
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
else
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
if (HUDprop->isAntialiased()) {
glEnable(GL_LINE_SMOOTH);
glAlphaFunc(GL_GREATER, HUDprop->alphaClamp());
glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
//glLineWidth(1.5);
} else {
//glLineWidth(1.0);
}
HUDprop->setColor();
for_each(HUD_deque.begin(), HUD_deque.end(), HUDdraw());
//HUD_TextList.add( fgText(40, 10, get_formated_gmt_time(), 0) );
int apY = 480 - 80;
if (strcmp( heading_enabled->getStringValue(), "dg-heading-hold") == 0 ) {
snprintf( hud_hdg_text, 256, "hdg = %.1f\n",
fgGetDouble("/autopilot/settings/heading-bug-deg") );
HUD_TextList.add( fgText( 40, apY, hud_hdg_text ) );
apY -= 15;
} else if ( strcmp(heading_enabled->getStringValue(), "true-heading-hold") == 0 ) {
snprintf( hud_hdg_text, 256, "hdg = %.1f\n",
fgGetDouble("/autopilot/settings/true-heading-deg") );
HUD_TextList.add( fgText( 40, apY, hud_hdg_text ) );
apY -= 15;
string wp0_id = fgGetString( "/autopilot/route-manager/wp[0]/id" );
if ( wp0_id.length() > 0 ) {
snprintf( hud_wp0_text, 256, "%5s %6.1fnm %s", wp0_id.c_str(),
fgGetDouble( "/autopilot/route-manager/wp[0]/dist" ),
fgGetString( "/autopilot/route-manager/wp[0]/eta" ) );
HUD_TextList.add( fgText( 40, apY, hud_wp0_text ) );
apY -= 15;
}
string wp1_id = fgGetString( "/autopilot/route-manager/wp[1]/id" );
if ( wp1_id.length() > 0 ) {
snprintf( hud_wp1_text, 256, "%5s %6.1fnm %s", wp1_id.c_str(),
fgGetDouble( "/autopilot/route-manager/wp[1]/dist" ),
fgGetString( "/autopilot/route-manager/wp[1]/eta" ) );
HUD_TextList.add( fgText( 40, apY, hud_wp1_text ) );
apY -= 15;
}
string wp2_id = fgGetString( "/autopilot/route-manager/wp-last/id" );
if ( wp2_id.length() > 0 ) {
snprintf( hud_wp2_text, 256, "%5s %6.1fnm %s", wp2_id.c_str(),
fgGetDouble( "/autopilot/route-manager/wp-last/dist" ),
fgGetString( "/autopilot/route-manager/wp-last/eta" ) );
HUD_TextList.add( fgText( 40, apY, hud_wp2_text ) );
apY -= 15;
}
}
if ( strcmp( altitude_enabled->getStringValue(), "altitude-hold" ) == 0 ) {
snprintf( hud_alt_text, 256, "alt = %.0f\n",
fgGetDouble("/autopilot/settings/target-altitude-ft") );
HUD_TextList.add( fgText( 40, apY, hud_alt_text ) );
apY -= 15;
} else if ( strcmp( altitude_enabled->getStringValue(), "agl-hold" ) == 0 ){
snprintf( hud_alt_text, 256, "agl = %.0f\n",
fgGetDouble("/autopilot/settings/target-agl-ft") );
HUD_TextList.add( fgText( 40, apY, hud_alt_text ) );
apY -= 15;
}
HUD_TextList.draw();
HUD_LineList.draw();
// glEnable(GL_LINE_STIPPLE);
// glLineStipple( 1, 0x00FF );
// HUD_StippleLineList.draw();
// glDisable(GL_LINE_STIPPLE);
if (HUDprop->isAntialiased()) {
glDisable(GL_ALPHA_TEST);
glDisable(GL_LINE_SMOOTH);
//glLineWidth(1.0);
}
if (HUDprop->isTransparent())
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
}
void fgTextList::draw()
{
if (!Font)
return;
vector<fgText>::iterator curString = List.begin();
vector<fgText>::iterator lastString = List.end();
glPushAttrib(GL_COLOR_BUFFER_BIT);
glEnable(GL_BLEND);
if (HUDprop->isTransparent())
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
else
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
if (HUDprop->isAntialiased()) {
glEnable(GL_ALPHA_TEST);
glAlphaFunc(GL_GREATER, HUDprop->alphaClamp());
}
Font->begin();
for (; curString != lastString; curString++)
curString->Draw(Font);
Font->end();
glDisable(GL_TEXTURE_2D);
glPopAttrib();
}
// HUD property listener class
//
HUD_Properties::HUD_Properties() :
_current(fgGetNode("/sim/hud/current-color", true)),
_visibility(fgGetNode("/sim/hud/visibility", true)),
_antialiasing(fgGetNode("/sim/hud/color/antialiased", true)),
_transparency(fgGetNode("/sim/hud/color/transparent", true)),
_red(fgGetNode("/sim/hud/color/red", true)),
_green(fgGetNode("/sim/hud/color/green", true)),
_blue(fgGetNode("/sim/hud/color/blue", true)),
_alpha(fgGetNode("/sim/hud/color/alpha", true)),
_alpha_clamp(fgGetNode("/sim/hud/color/alpha-clamp", true)),
_brightness(fgGetNode("/sim/hud/color/brightness", true)),
_visible(false),
_antialiased(false),
_transparent(false),
_a(0.67),
_cl(0.01)
{
_visibility->addChangeListener(this);
_antialiasing->addChangeListener(this);
_transparency->addChangeListener(this);
_red->addChangeListener(this);
_green->addChangeListener(this);
_blue->addChangeListener(this);
_alpha->addChangeListener(this);
_alpha_clamp->addChangeListener(this);
_brightness->addChangeListener(this);
_current->addChangeListener(this, true);
}
void HUD_Properties::valueChanged(SGPropertyNode *node)
{
if (!strcmp(node->getName(), "current-color")) {
int i = node->getIntValue();
if (i < 0)
i = 0;
SGPropertyNode *n = fgGetNode("/sim/hud/palette", true);
if ((n = n->getChild("color", i, false))) {
if (n->hasValue("red"))
_red->setFloatValue(n->getFloatValue("red", 1.0));
if (n->hasValue("green"))
_green->setFloatValue(n->getFloatValue("green", 1.0));
if (n->hasValue("blue"))
_blue->setFloatValue(n->getFloatValue("blue", 1.0));
if (n->hasValue("alpha"))
_alpha->setFloatValue(n->getFloatValue("alpha", 0.67));
if (n->hasValue("alpha-clamp"))
_alpha_clamp->setFloatValue(n->getFloatValue("alpha-clamp", 0.01));
if (n->hasValue("brightness"))
_brightness->setFloatValue(n->getFloatValue("brightness", 0.75));
if (n->hasValue("antialiased"))
_antialiasing->setBoolValue(n->getBoolValue("antialiased", false));
if (n->hasValue("transparent"))
_transparency->setBoolValue(n->getBoolValue("transparent", false));
}
}
_visible = _visibility->getBoolValue();
_transparent = _transparency->getBoolValue();
_antialiased = _antialiasing->getBoolValue();
float brt = _brightness->getFloatValue();
_r = clamp(brt * _red->getFloatValue());
_g = clamp(brt * _green->getFloatValue());
_b = clamp(brt * _blue->getFloatValue());
_a = clamp(_alpha->getFloatValue());
_cl = clamp(_alpha_clamp->getFloatValue());
}
void HUD_Properties::setColor() const
{
if (_antialiased)
glColor4f(_r, _g, _b, _a);
else
glColor3f(_r, _g, _b);
}
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