1 // NasalDisplay.cxx - routines to display Nasal output
3 // Written by David Luff, started October 2001.
5 // Copyright (C) 2001 David C Luff - david.luff@nottingham.ac.uk
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <simgear/compiler.h>
33 #include <simgear/props/props.hxx>
35 #include <Include/general.hxx>
36 #include <Main/fg_props.hxx>
39 #include "NasalDisplay.hxx"
43 FGNasalDisplay::FGNasalDisplay() {
45 change_msg_flag = false;
52 FGNasalDisplay::~FGNasalDisplay() {
55 void FGNasalDisplay::init() {
58 void FGNasalDisplay::bind() {
61 void FGNasalDisplay::unbind() {
64 // update - this actually draws the visuals and should be called from the main Flightgear rendering loop.
65 void FGNasalDisplay::update(double dt) {
67 // These strings are used for temporary storage of the transmission string in order
68 // that the string we view only changes when the next repetition starts scrolling
69 // even though the master string (rep_msg_str) may change at any time.
70 static string msg1 = "";
71 static string msg2 = "";
73 if( rep_msg || msgList.size() ) {
74 SGPropertyNode *xsize_node = fgGetNode("/sim/startup/xsize");
75 SGPropertyNode *ysize_node = fgGetNode("/sim/startup/ysize");
76 int iwidth = xsize_node->getIntValue();
77 int iheight = ysize_node->getIntValue();
79 glMatrixMode( GL_PROJECTION );
82 gluOrtho2D( 0, iwidth, 0, iheight );
83 glMatrixMode( GL_MODELVIEW );
87 glDisable( GL_DEPTH_TEST );
88 glDisable( GL_LIGHTING );
90 glColor3f( 0.9, 0.4, 0.2 );
92 float fps = general.get_frame_rate();
95 //cout << "dsp_offset1 = " << dsp_offset1 << " dsp_offset2 = " << dsp_offset2 << endl;
96 if(dsp_offset1 == 0) {
99 if(dsp_offset2 == 0) {
102 // Check for the situation where one offset is negative and the message is changed
103 if(change_msg_flag) {
104 if(dsp_offset1 < 0) {
106 } else if(dsp_offset2 < 0) {
109 change_msg_flag = false;
112 // guiFnt.drawString( rep_msg_str.c_str(),
113 // int(iwidth - guiFnt.getStringWidth(buf) - 10 - (int)dsp_offset),
115 guiFnt.drawString( msg1.c_str(),
116 int(iwidth - 10 - dsp_offset1),
118 guiFnt.drawString( msg2.c_str(),
119 int(iwidth - 10 - dsp_offset2),
122 // Try to scroll at a frame rate independent speed
123 // 40 pixels/second looks about right for now
124 if(dsp_offset1 >= dsp_offset2) {
125 dsp_offset1+=(40.0/fps);
126 dsp_offset2 = dsp_offset1 - (rep_msg_str.size() * 10) - 100;
127 if(dsp_offset1 > (iwidth + (rep_msg_str.size() * 10)))
130 dsp_offset2+=(40.0/fps);
131 dsp_offset1 = dsp_offset2 - (rep_msg_str.size() * 10) - 100;
132 if(dsp_offset2 > (iwidth + (rep_msg_str.size() * 10)))
139 //cout << "Attempting to render single message\n";
140 // We have at least one non-repeating message to process
141 if(fgGetBool("/ATC/display/scroll-single-messages")) { // Scroll single messages across the screen.
142 msgList_itr = msgList.begin();
144 while(msgList_itr != msgList.end()) {
145 nasalMessage m = *msgList_itr;
146 //cout << "m.counter = " << m.counter << '\n';
147 if(m.dsp_offset > (iwidth + (m.msg.size() * 10))) {
148 //cout << "Stopping single message\n";
149 msgList_itr = msgList.erase(msgList_itr);
150 } else if(m.counter > m.start_count) {
151 //cout << "Drawing single message\n";
152 guiFnt.drawString( m.msg.c_str(),
153 int(iwidth - 10 - m.dsp_offset),
156 m.dsp_offset += (80.0/fps);
161 //cout << "Not yet started single message\n";
168 } else { // Display single messages for a short period of time.
169 msgList_itr = msgList.begin();
171 while(msgList_itr != msgList.end()) {
172 nasalMessage m = *msgList_itr;
173 //cout << "m.counter = " << m.counter << '\n';
174 if(m.counter > m.stop_count) {
175 //cout << "Stopping single message\n";
176 msgList_itr = msgList.erase(msgList_itr);
177 } else if(m.counter > m.start_count) {
178 int pin = (((int)m.msg.size() * 8) >= iwidth ? 5 : (iwidth - (m.msg.size() * 8))/2);
179 //cout << m.msg << '\n';
180 //cout << "pin = " << pin << ", iwidth = " << iwidth << ", msg.size = " << m.msg.size() << '\n';
181 guiFnt.drawString( m.msg.c_str(), pin, (iheight - 80) );
195 glEnable( GL_DEPTH_TEST );
196 glEnable( GL_LIGHTING );
197 glMatrixMode( GL_PROJECTION );
199 glMatrixMode( GL_MODELVIEW );
204 void FGNasalDisplay::RegisterSingleMessage(const string& msg, double delay) {
205 //cout << msg << '\n';
210 m.start_count = delay;
211 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
212 //cout << "m.stop_count = " << m.stop_count << '\n';
216 msgList.push_back(m);
217 //cout << "Single message registered\n";
220 void FGNasalDisplay::RegisterRepeatingMessage(const string& msg) {
226 void FGNasalDisplay::ChangeRepeatingMessage(const string& newmsg) {
227 rep_msg_str = newmsg;
228 change_msg_flag = true;
232 void FGNasalDisplay::CancelRepeatingMessage() {