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flightgear/src/Cockpit/hud_rwy.cxx
frohlich 4fe615fff5 Modified Files: 
src/AIModel/AIBase.cxx src/AIModel/AICarrier.cxx
	src/ATC/AIEntity.cxx src/Cockpit/hud_rwy.cxx
 	src/FDM/Makefile.am src/FDM/flight.hxx src/FDM/groundcache.cxx
	src/Instrumentation/HUD/HUD_runway.cxx src/Main/Makefile.am
	src/Main/fg_init.cxx src/Main/main.cxx src/Main/renderer.cxx
	src/Main/viewer.cxx src/Main/viewer.hxx src/Model/acmodel.cxx
	src/Model/modelmgr.cxx src/Scenery/scenery.cxx
	src/Scenery/scenery.hxx src/Scenery/tileentry.cxx
	src/Time/tmp.cxx: Remove the scenery center handling.
	Osg has double valued transforms at any relevant place.
2007-05-05 08:08:24 +00:00

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// hud_rwy.cxx -- An instrument that renders a virtual runway on the HUD
//
// Written by Aaron Wilson & Phillip Merritt, Nov 2004.
//
// Copyright (C) 2004 Aaron Wilson, Aaron.I.Wilson@nasa.gov
// Copyright (C) 2004 Phillip Merritt, Phillip.M.Merritt@nasa.gov
//
// 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.
//
#include <simgear/compiler.h>
#include "hud.hxx"
#include <math.h>
#include <Main/globals.hxx>
#include <Scenery/scenery.hxx>
#include <Aircraft/aircraft.hxx>
#include <Environment/environment.hxx>
#include <Environment/environment_mgr.hxx>
#include <simgear/math/sg_geodesy.hxx>
#include <simgear/math/polar3d.hxx>
#include SG_GLU_H
#include <ATC/ATCutils.hxx>
// int x, int y, int width, int height, float scale_data, bool working)
runway_instr::runway_instr(const SGPropertyNode *node) :
instr_item(
node->getIntValue("x"),
node->getIntValue("y"),
node->getIntValue("width"),
node->getIntValue("height"),
NULL,
node->getDoubleValue("scale"),
0,
node->getBoolValue("working", true)),
arrowScale(node->getDoubleValue("arrow_scale", 1.0)),
arrowRad(node->getDoubleValue("arrow_radius")),
lnScale(node->getDoubleValue("line_scale", 1.0)),
scaleDist(node->getDoubleValue("scale_dist_nm")),
default_pitch(fgGetDouble("/sim/view[0]/config/pitch-pitch-deg", 0.0)),
default_heading(fgGetDouble("/sim/view[0]/config/pitch-heading-deg", 0.0)),
cockpit_view(globals->get_viewmgr()->get_view(0)),
stippleOut(node->getIntValue("outer_stipple", 0xFFFF)),
stippleCen(node->getIntValue("center_stipple", 0xFFFF)),
drawIA(arrowScale > 0 ? true : false),
drawIAAlways(arrowScale > 0 ? node->getBoolValue("arrow_always") : false)
{
SG_LOG(SG_INPUT, SG_INFO, "Done reading runway instrument "
<< node->getStringValue("name", "[unnamed]"));
view[0] = 0;
view[1] = 0;
view[2] = 640;
view[3] = 480;
center.x = view[2] >> 1;
center.y = view[3] >> 1;
location.left = center.x - (get_width() >> 1) + get_x();
location.right = center.x + (get_width() >>1) + get_x();
location.bottom = center.y - (get_height() >>1) + get_y();
location.top = center.y + (get_height() >> 1) + get_y();
}
void runway_instr::draw()
{
if (!is_broken() && get_active_runway(runway)) {
glPushAttrib(GL_LINE_STIPPLE | GL_LINE_STIPPLE_PATTERN | GL_LINE_WIDTH);
float modelView[4][4], projMat[4][4];
bool anyLines;
//Get the current view
FGViewer* curr_view = globals->get_viewmgr()->get_current_view();
int curr_view_id = globals->get_viewmgr()->get_current();
double gpo = curr_view->getGoalPitchOffset_deg();
double gho = curr_view->getGoalHeadingOffset_deg();
double po = curr_view->getPitchOffset_deg();
double ho = curr_view->getHeadingOffset_deg();
double yaw = -(cockpit_view->getHeadingOffset_deg() - default_heading) * SG_DEGREES_TO_RADIANS;
double pitch = (cockpit_view->getPitchOffset_deg() - default_pitch) * SG_DEGREES_TO_RADIANS;
//double roll = fgGetDouble("/sim/view[0]/config/roll-offset-deg",0.0) //TODO: adjust for default roll offset
double sPitch = sin(pitch), cPitch = cos(pitch),
sYaw = sin(yaw), cYaw = cos(yaw);
//Assuming that the "Cockpit View" is always at position zero!!!
if (curr_view_id != 0) {
globals->get_viewmgr()->set_view(0);
globals->get_viewmgr()->copyToCurrent();
}
//Set the camera to the cockpit view to get the view of the runway from the cockpit
// OSGFIXME
// ssgSetCamera((sgVec4 *)cockpit_view->get_VIEW());
get_rwy_points(points3d);
//Get the current project matrix
// OSGFIXME
// ssgGetProjectionMatrix(projMat);
// const sgVec4 *viewMat = globals->get_current_view()->get_VIEW();
//Get the current model view matrix (cockpit view)
// OSGFIXME
// ssgGetModelviewMatrix(modelView);
//Create a rotation matrix to correct for any offsets (other than default offsets) to the model view matrix
sgMat4 xy; //rotation about the Rxy, negate the sin's on Ry
xy[0][0] = cYaw; xy[1][0] = 0.0f; xy[2][0] = -sYaw; xy[3][0] = 0.0f;
xy[0][1] = sPitch*-sYaw; xy[1][1] = cPitch; xy[2][1] = -sPitch*cYaw; xy[3][1] = 0.0f;
xy[0][2] = cPitch*sYaw; xy[1][2] = sPitch; xy[2][2] = cPitch*cYaw; xy[3][2] = 0.0f;
xy[0][3] = 0.0f; xy[1][3] = 0.0f; xy[2][3] = 0.0f; xy[3][3] = 1.0f;
//Re-center the model view
sgPostMultMat4(modelView,xy);
//copy float matrices to double
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
int idx = (i * 4) + j;
mm[idx] = (double)modelView[i][j];
pm[idx] = (double)projMat[i][j];
}
}
//Calculate the 2D points via gluProject
int result = GL_TRUE;
for (int i = 0; i < 6; i++) {
result = gluProject(points3d[i][0], points3d[i][1], points3d[i][2], mm,
pm, view, &points2d[i][0], &points2d[i][1], &points2d[i][2]);
}
//set the line width based on our distance from the runway
setLineWidth();
//Draw the runway lines on the HUD
glEnable(GL_LINE_STIPPLE);
glLineStipple(1, stippleOut);
anyLines =
drawLine(points3d[0], points3d[1], points2d[0], points2d[1]) | //draw top
drawLine(points3d[2], points3d[1], points2d[2], points2d[1]) | //draw right
drawLine(points3d[2], points3d[3], points2d[2], points2d[3]) | //draw bottom
drawLine(points3d[3], points3d[0], points2d[3], points2d[0]); //draw left
glLineStipple(1, stippleCen);
anyLines |= drawLine(points3d[5], points3d[4], points2d[5], points2d[4]); //draw center
//Check to see if arrow needs drawn
if ((!anyLines && drawIA) || drawIAAlways) {
drawArrow(); //draw indication arrow
}
//Restore the current view and any offsets
if (curr_view_id != 0) {
globals->get_viewmgr()->set_view(curr_view_id);
globals->get_viewmgr()->copyToCurrent();
curr_view->setHeadingOffset_deg(ho);
curr_view->setPitchOffset_deg(po);
curr_view->setGoalHeadingOffset_deg(gho);
curr_view->setGoalPitchOffset_deg(gpo);
}
//Set the camera back to the current view
// OSGFIXME
// ssgSetCamera((sgVec4 *)curr_view);
glPopAttrib();
}//if not broken
}
bool runway_instr::get_active_runway(FGRunway& runway)
{
FGEnvironment stationweather =
((FGEnvironmentMgr *)globals->get_subsystem("environment"))->getEnvironment();
double hdg = stationweather.get_wind_from_heading_deg();
return globals->get_runways()->search(fgGetString("/sim/presets/airport-id"), int(hdg), &runway);
}
void runway_instr::get_rwy_points(sgdVec3 *points3d)
{
double alt = current_aircraft.fdm_state->get_Runway_altitude() * SG_FEET_TO_METER;
double length = (runway._length / 2.0) * SG_FEET_TO_METER;
double width = (runway._width / 2.0) * SG_FEET_TO_METER;
double frontLat, frontLon, backLat, backLon,az, tempLat, tempLon;
geo_direct_wgs_84(alt, runway._lat, runway._lon, runway._heading, length, &backLat, &backLon, &az);
sgGeodToCart(backLat * SG_DEGREES_TO_RADIANS, backLon * SG_DEGREES_TO_RADIANS, alt, points3d[4]);
geo_direct_wgs_84(alt, runway._lat, runway._lon, runway._heading + 180, length, &frontLat, &frontLon, &az);
sgGeodToCart(frontLat * SG_DEGREES_TO_RADIANS, frontLon * SG_DEGREES_TO_RADIANS, alt, points3d[5]);
geo_direct_wgs_84(alt, backLat, backLon, runway._heading + 90, width, &tempLat, &tempLon, &az);
sgGeodToCart(tempLat * SG_DEGREES_TO_RADIANS, tempLon * SG_DEGREES_TO_RADIANS, alt, points3d[0]);
geo_direct_wgs_84(alt, backLat, backLon, runway._heading - 90, width, &tempLat, &tempLon, &az);
sgGeodToCart(tempLat * SG_DEGREES_TO_RADIANS, tempLon * SG_DEGREES_TO_RADIANS, alt, points3d[1]);
geo_direct_wgs_84(alt, frontLat, frontLon, runway._heading - 90, width, &tempLat, &tempLon, &az);
sgGeodToCart(tempLat * SG_DEGREES_TO_RADIANS, tempLon * SG_DEGREES_TO_RADIANS, alt, points3d[2]);
geo_direct_wgs_84(alt, frontLat, frontLon, runway._heading + 90, width, &tempLat, &tempLon, &az);
sgGeodToCart(tempLat * SG_DEGREES_TO_RADIANS, tempLon * SG_DEGREES_TO_RADIANS, alt, points3d[3]);
}
bool runway_instr::drawLine(const sgdVec3& a1, const sgdVec3& a2, const sgdVec3& point1, const sgdVec3& point2)
{
sgdVec3 p1, p2;
sgdCopyVec3(p1, point1);
sgdCopyVec3(p2, point2);
bool p1Inside = (p1[0] >= location.left && p1[0] <= location.right
&& p1[1] >= location.bottom && p1[1] <= location.top);
bool p1Insight = (p1[2] >= 0.0 && p1[2] < 1.0);
bool p1Valid = p1Insight && p1Inside;
bool p2Inside = (p2[0] >= location.left && p2[0] <= location.right
&& p2[1] >= location.bottom && p2[1] <= location.top);
bool p2Insight = (p2[2] >= 0.0 && p2[2] < 1.0);
bool p2Valid = p2Insight && p2Inside;
if (p1Valid && p2Valid) { //Both project points are valid, draw the line
glBegin(GL_LINES);
glVertex2d(p1[0],p1[1]);
glVertex2d(p2[0],p2[1]);
glEnd();
} else if (p1Valid) { //p1 is valid and p2 is not, calculate a new valid point
sgdVec3 vec = {a2[0] - a1[0], a2[1] - a1[1], a2[2] - a1[2]};
//create the unit vector
sgdScaleVec3(vec, 1.0 / sgdLengthVec3(vec));
sgdVec3 newPt;
sgdCopyVec3(newPt, a1);
sgdAddVec3(newPt, vec);
if (gluProject(newPt[0], newPt[1], newPt[2], mm, pm, view, &p2[0], &p2[1], &p2[2])
&& (p2[2] > 0 && p2[2] < 1.0)) {
boundPoint(p1, p2);
glBegin(GL_LINES);
glVertex2d(p1[0], p1[1]);
glVertex2d(p2[0], p2[1]);
glEnd();
}
} else if (p2Valid) { //p2 is valid and p1 is not, calculate a new valid point
sgdVec3 vec = {a1[0] - a2[0], a1[1] - a2[1], a1[2] - a2[2]};
//create the unit vector
sgdScaleVec3(vec, 1.0 / sgdLengthVec3(vec));
sgdVec3 newPt;
sgdCopyVec3(newPt, a2);
sgdAddVec3(newPt, vec);
if (gluProject(newPt[0], newPt[1], newPt[2], mm, pm, view, &p1[0], &p1[1], &p1[2])
&& (p1[2] > 0 && p1[2] < 1.0)) {
boundPoint(p2, p1);
glBegin(GL_LINES);
glVertex2d(p2[0], p2[1]);
glVertex2d(p1[0], p1[1]);
glEnd();
}
} else if (p1Insight && p2Insight) { //both points are insight, but not inside
bool v = boundOutsidePoints(p1, p2);
if (v) {
glBegin(GL_LINES);
glVertex2d(p1[0], p1[1]);
glVertex2d(p2[0], p2[1]);
glEnd();
}
return v;
}
//else both points are not insight, don't draw anything
return (p1Valid && p2Valid);
}
void runway_instr::boundPoint(const sgdVec3& v, sgdVec3& m)
{
double y = v[1];
if (m[1] < v[1])
y = location.bottom;
else if (m[1] > v[1])
y = location.top;
if (m[0] == v[0]) {
m[1] = y;
return; //prevent divide by zero
}
double slope = (m[1] - v[1]) / (m[0] - v[0]);
m[0] = (y - v[1]) / slope + v[0];
m[1] = y;
if (m[0] < location.left) {
m[0] = location.left;
m[1] = slope * (location.left - v[0]) + v[1];
} else if (m[0] > location.right) {
m[0] = location.right;
m[1] = slope * (location.right - v[0]) + v[1];
}
}
bool runway_instr::boundOutsidePoints(sgdVec3& v, sgdVec3& m)
{
bool pointsInvalid = (v[1] > location.top && m[1] > location.top) ||
(v[1] < location.bottom && m[1] < location.bottom) ||
(v[0] > location.right && m[0] > location.right) ||
(v[0] < location.left && m[0] < location.left);
if (pointsInvalid)
return false;
if (m[0] == v[0]) {//x's are equal, vertical line
if (m[1] > v[1]) {
m[1] = location.top;
v[1] = location.bottom;
} else {
v[1] = location.top;
m[1] = location.bottom;
}
return true;
}
if (m[1] == v[1]) { //y's are equal, horizontal line
if (m[0] > v[0]) {
m[0] = location.right;
v[0] = location.left;
} else {
v[0] = location.right;
m[0] = location.left;
}
return true;
}
double slope = (m[1] - v[1]) / (m[0] - v[0]);
double b = v[1] - (slope * v[0]);
double y1 = slope * location.left + b;
double y2 = slope * location.right + b;
double x1 = (location.bottom - b) / slope;
double x2 = (location.top - b) / slope;
int counter = 0;
if (y1 >= location.bottom && y1 <= location.top) {
v[0] = location.left;
v[1] = y1;
counter++;
}
if (y2 >= location.bottom && y2 <= location.top) {
if (counter > 0) {
m[0] = location.right;
m[1] = y2;
} else {
v[0] = location.right;
v[1] = y2;
}
counter++;
}
if (x1 >= location.left && x1 <= location.right) {
if (counter > 0) {
m[0] = x1;
m[1] = location.bottom;
} else {
v[0] = x1;
v[1] = location.bottom;
}
counter++;
}
if (x2 >= location.left && x2 <= location.right) {
m[0] = x1;
m[1] = location.bottom;
counter++;
}
return (counter == 2);
}
void runway_instr::drawArrow()
{
Point3D ac(0.0), rwy(0.0);
ac.setlat(current_aircraft.fdm_state->get_Latitude_deg());
ac.setlon(current_aircraft.fdm_state->get_Longitude_deg());
rwy.setlat(runway._lat);
rwy.setlon(runway._lon);
float theta = GetHeadingFromTo(ac, rwy);
theta -= fgGetDouble("/orientation/heading-deg");
theta = -theta;
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glTranslated((location.right + location.left) / 2.0,(location.top + location.bottom) / 2.0, 0.0);
glRotated(theta, 0.0, 0.0, 1.0);
glTranslated(0.0, arrowRad, 0.0);
glScaled(arrowScale, arrowScale, 0.0);
glBegin(GL_TRIANGLES);
glVertex2d(-5.0, 12.5);
glVertex2d(0.0, 25.0);
glVertex2d(5.0, 12.5);
glEnd();
glBegin(GL_QUADS);
glVertex2d(-2.5, 0.0);
glVertex2d(-2.5, 12.5);
glVertex2d(2.5, 12.5);
glVertex2d(2.5, 0.0);
glEnd();
glPopMatrix();
}
void runway_instr::setLineWidth()
{
//Calculate the distance from the runway, A
double course, distance;
calc_gc_course_dist(Point3D(runway._lon * SGD_DEGREES_TO_RADIANS,
runway._lat * SGD_DEGREES_TO_RADIANS, 0.0),
Point3D(current_aircraft.fdm_state->get_Longitude(),
current_aircraft.fdm_state->get_Latitude(), 0.0 ),
&course, &distance);
distance *= SG_METER_TO_NM;
//Get altitude above runway, B
double alt_nm = get_agl();
static const SGPropertyNode *startup_units_node = fgGetNode("/sim/startup/units");
if (!strcmp(startup_units_node->getStringValue(), "feet"))
alt_nm *= SG_FEET_TO_METER*SG_METER_TO_NM;
else
alt_nm *= SG_METER_TO_NM;
//Calculate distance away from runway, C = v(A<>+B<>)
distance = sqrt(alt_nm * alt_nm + distance*distance);
if (distance < scaleDist)
glLineWidth(1.0 + ((lnScale - 1) * ((scaleDist - distance) / scaleDist)));
else
glLineWidth(1.0);
}
void runway_instr::setArrowRotationRadius(double radius) { arrowRad = radius; }
void runway_instr::setArrowScale(double scale) { arrowScale = scale; }
void runway_instr::setDrawArrow(bool draw) {drawIA = draw;}
void runway_instr::setDrawArrowAlways(bool draw) {drawIAAlways = draw;}
void runway_instr::setLineScale(double scale) {lnScale = scale;}
void runway_instr::setScaleDist(double dist_m) {scaleDist = dist_m;}
void runway_instr::setStippleOutline(unsigned short stipple) {stippleOut = stipple;}
void runway_instr::setStippleCenterline(unsigned short stipple){stippleCen = stipple;}
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