479 lines
13 KiB
C++
479 lines
13 KiB
C++
// viewmgr.cxx -- class for managing all the views in the flightgear world.
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//
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// Written by Curtis Olson, started October 2000.
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// partially rewritten by Jim Wilson March 2002
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//
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// Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#include <string.h> // strcmp
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#include <plib/sg.h>
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#include "viewmgr.hxx"
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#include "fg_props.hxx"
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// Constructor
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FGViewMgr::FGViewMgr( void ) :
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axis_long(0),
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axis_lat(0),
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current(0)
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{
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}
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// Destructor
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FGViewMgr::~FGViewMgr( void ) {
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}
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void
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FGViewMgr::init ()
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{
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char stridx [ 20 ];
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string viewpath, nodepath, strdata;
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bool from_model = false;
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bool at_model = false;
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int from_model_index = 0;
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int at_model_index = 0;
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double x_offset_m, y_offset_m, z_offset_m;
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double near_m;
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for (int i = 0; i < fgGetInt("/sim/number-views"); i++) {
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viewpath = "/sim/view";
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sprintf(stridx, "[%d]", i);
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viewpath += stridx;
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// find out what type of view this is...
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nodepath = viewpath;
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nodepath += "/type";
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strdata = fgGetString(nodepath.c_str());
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// FIXME:
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// this is assumed to be an aircraft model...we will need to read
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// model-from-type as well.
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// find out if this is a model we are looking from...
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nodepath = viewpath;
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nodepath += "/config/from-model";
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from_model = fgGetBool(nodepath.c_str());
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// get model index (which model)
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if (from_model) {
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nodepath = viewpath;
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nodepath += "/config/from-model-idx";
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from_model_index = fgGetInt(nodepath.c_str());
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}
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if ( strcmp("lookat",strdata.c_str()) == 0 ) {
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// find out if this is a model we are looking at...
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nodepath = viewpath;
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nodepath += "/config/at-model";
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at_model = fgGetBool(nodepath.c_str());
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// get model index (which model)
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if (at_model) {
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nodepath = viewpath;
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nodepath += "/config/at-model-idx";
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at_model_index = fgGetInt(nodepath.c_str());
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}
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}
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nodepath = viewpath;
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nodepath += "/config/x-offset-m";
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x_offset_m = fgGetDouble(nodepath.c_str());
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nodepath = viewpath;
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nodepath += "/config/y-offset-m";
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y_offset_m = fgGetDouble(nodepath.c_str());
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nodepath = viewpath;
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nodepath += "/config/z-offset-m";
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z_offset_m = fgGetDouble(nodepath.c_str());
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nodepath = viewpath;
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nodepath += "/config/ground-level-nearplane-m";
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near_m = fgGetDouble(nodepath.c_str());
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// supporting two types now "lookat" = 1 and "lookfrom" = 0
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if ( strcmp("lookat",strdata.c_str()) == 0 )
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add_view(new FGViewer ( FG_LOOKAT, from_model, from_model_index,
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at_model, at_model_index, x_offset_m, y_offset_m,
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z_offset_m, near_m ));
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else
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add_view(new FGViewer ( FG_LOOKFROM, from_model, from_model_index, false,
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0, x_offset_m, y_offset_m, z_offset_m, near_m ));
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}
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copyToCurrent();
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}
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typedef double (FGViewMgr::*double_getter)() const;
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void
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FGViewMgr::bind ()
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{
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// these are bound to the current view properties
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fgTie("/sim/current-view/heading-offset-deg", this,
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&FGViewMgr::getViewOffset_deg, &FGViewMgr::setViewOffset_deg);
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fgSetArchivable("/sim/current-view/heading-offset-deg");
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fgTie("/sim/current-view/goal-heading-offset-deg", this,
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&FGViewMgr::getGoalViewOffset_deg, &FGViewMgr::setGoalViewOffset_deg);
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fgSetArchivable("/sim/current-view/goal-heading-offset-deg");
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fgTie("/sim/current-view/pitch-offset-deg", this,
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&FGViewMgr::getViewTilt_deg, &FGViewMgr::setViewTilt_deg);
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fgSetArchivable("/sim/current-view/pitch-offset-deg");
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fgTie("/sim/current-view/goal-pitch-offset-deg", this,
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&FGViewMgr::getGoalViewTilt_deg, &FGViewMgr::setGoalViewTilt_deg);
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fgSetArchivable("/sim/current-view/goal-pitch-offset-deg");
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fgTie("/sim/current-view/axes/long", this,
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(double_getter)0, &FGViewMgr::setViewAxisLong);
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fgTie("/sim/current-view/axes/lat", this,
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(double_getter)0, &FGViewMgr::setViewAxisLat);
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fgTie("/sim/current-view/field-of-view", this,
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&FGViewMgr::getFOV_deg, &FGViewMgr::setFOV_deg);
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fgSetArchivable("/sim/current-view/field-of-view");
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fgTie("/sim/current-view/ground-level-nearplane-m", this,
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&FGViewMgr::getNear_m, &FGViewMgr::setNear_m);
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fgSetArchivable("/sim/current-view/ground-level-nearplane-m");
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}
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void
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FGViewMgr::unbind ()
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{
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// FIXME:
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// need to redo these bindings to the new locations (move to viewer?)
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fgUntie("/sim/current-view/heading-offset-deg");
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fgUntie("/sim/current-view/goal-heading-offset-deg");
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fgUntie("/sim/current-view/pitch-offset-deg");
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fgUntie("/sim/current-view/goal-pitch-offset-deg");
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fgUntie("/sim/field-of-view");
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fgUntie("/sim/current-view/axes/long");
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fgUntie("/sim/current-view/axes/lat");
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}
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void
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FGViewMgr::update (double dt)
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{
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char stridx [20];
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string viewpath, nodepath;
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double lon_deg, lat_deg, alt_ft, roll_deg, pitch_deg, heading_deg;
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FGViewer * view = get_current_view();
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if (view == 0)
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return;
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//
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int i = current;
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viewpath = "/sim/view";
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sprintf(stridx, "[%d]", i);
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viewpath += stridx;
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FGViewer *loop_view = (FGViewer *)get_view( i );
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// Set up view location and orientation
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nodepath = viewpath;
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nodepath += "/config/from-model";
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if (!fgGetBool(nodepath.c_str())) {
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nodepath = viewpath;
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nodepath += "/config/eye-lon-deg-path";
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lon_deg = fgGetDouble(fgGetString(nodepath.c_str()));
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nodepath = viewpath;
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nodepath += "/config/eye-lat-deg-path";
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lat_deg = fgGetDouble(fgGetString(nodepath.c_str()));
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nodepath = viewpath;
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nodepath += "/config/eye-alt-ft-path";
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alt_ft = fgGetDouble(fgGetString(nodepath.c_str()));
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nodepath = viewpath;
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nodepath += "/config/eye-roll-deg-path";
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roll_deg = fgGetDouble(fgGetString(nodepath.c_str()));
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nodepath = viewpath;
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nodepath += "/config/eye-pitch-deg-path";
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pitch_deg = fgGetDouble(fgGetString(nodepath.c_str()));
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nodepath = viewpath;
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nodepath += "/config/eye-heading-deg-path";
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heading_deg = fgGetDouble(fgGetString(nodepath.c_str()));
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loop_view->setPosition(lon_deg, lat_deg, alt_ft);
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loop_view->setOrientation(roll_deg, pitch_deg, heading_deg);
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} else {
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// force recalc in viewer
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loop_view->set_dirty();
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}
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// if lookat (type 1) then get target data...
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if (loop_view->getType() == FG_LOOKAT) {
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nodepath = viewpath;
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nodepath += "/config/from-model";
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if (!fgGetBool(nodepath.c_str())) {
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nodepath = viewpath;
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nodepath += "/config/target-lon-deg-path";
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lon_deg = fgGetDouble(fgGetString(nodepath.c_str()));
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nodepath = viewpath;
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nodepath += "/config/target-lat-deg-path";
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lat_deg = fgGetDouble(fgGetString(nodepath.c_str()));
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nodepath = viewpath;
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nodepath += "/config/target-alt-ft-path";
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alt_ft = fgGetDouble(fgGetString(nodepath.c_str()));
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nodepath = viewpath;
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nodepath += "/config/target-roll-deg-path";
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roll_deg = fgGetDouble(fgGetString(nodepath.c_str()));
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nodepath = viewpath;
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nodepath += "/config/target-pitch-deg-path";
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pitch_deg = fgGetDouble(fgGetString(nodepath.c_str()));
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nodepath = viewpath;
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nodepath += "/config/target-heading-deg-path";
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heading_deg = fgGetDouble(fgGetString(nodepath.c_str()));
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loop_view ->setTargetPosition(lon_deg, lat_deg, alt_ft);
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loop_view->setTargetOrientation(roll_deg, pitch_deg, heading_deg);
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} else {
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loop_view->set_dirty();
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}
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}
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setPilotXOffset_m(fgGetDouble("/sim/current-view/x-offset-m"));
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setPilotYOffset_m(fgGetDouble("/sim/current-view/y-offset-m"));
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setPilotZOffset_m(fgGetDouble("/sim/current-view/z-offset-m"));
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// Update the current view
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do_axes();
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view->update(dt);
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}
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void
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FGViewMgr::copyToCurrent()
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{
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fgSetDouble("/sim/current-view/x-offset-m", getPilotXOffset_m());
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fgSetDouble("/sim/current-view/y-offset-m", getPilotYOffset_m());
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fgSetDouble("/sim/current-view/z-offset-m", getPilotZOffset_m());
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}
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double
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FGViewMgr::getViewOffset_deg () const
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{
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const FGViewer * view = get_current_view();
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return (view == 0 ? 0 : view->getHeadingOffset_deg());
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}
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void
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FGViewMgr::setViewOffset_deg (double offset)
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{
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FGViewer * view = get_current_view();
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if (view != 0) {
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view->setGoalHeadingOffset_deg(offset);
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view->setHeadingOffset_deg(offset);
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}
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}
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double
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FGViewMgr::getGoalViewOffset_deg () const
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{
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const FGViewer * view = get_current_view();
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return (view == 0 ? 0 : view->getGoalHeadingOffset_deg());
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}
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void
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FGViewMgr::setGoalViewOffset_deg (double offset)
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{
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FGViewer * view = get_current_view();
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if (view != 0)
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view->setGoalHeadingOffset_deg(offset);
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}
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double
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FGViewMgr::getViewTilt_deg () const
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{
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const FGViewer * view = get_current_view();
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return (view == 0 ? 0 : view->getPitchOffset_deg());
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}
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void
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FGViewMgr::setViewTilt_deg (double tilt)
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{
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FGViewer * view = get_current_view();
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if (view != 0) {
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view->setGoalPitchOffset_deg(tilt);
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view->setPitchOffset_deg(tilt);
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}
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}
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double
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FGViewMgr::getGoalViewTilt_deg () const
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{
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const FGViewer * view = get_current_view();
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return (view == 0 ? 0 : view->getGoalPitchOffset_deg());
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}
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void
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FGViewMgr::setGoalViewTilt_deg (double tilt)
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{
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FGViewer * view = get_current_view();
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if (view != 0)
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view->setGoalPitchOffset_deg(tilt);
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}
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double
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FGViewMgr::getPilotXOffset_m () const
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{
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const FGViewer * view = get_current_view();
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if (view != 0) {
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return ((FGViewer *)view)->getXOffset_m();
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} else {
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return 0;
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}
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}
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void
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FGViewMgr::setPilotXOffset_m (double x)
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{
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FGViewer * view = get_current_view();
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if (view != 0) {
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view->setXOffset_m(x);
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}
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}
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double
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FGViewMgr::getPilotYOffset_m () const
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{
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const FGViewer * view = get_current_view();
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if (view != 0) {
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return ((FGViewer *)view)->getYOffset_m();
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} else {
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return 0;
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}
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}
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void
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FGViewMgr::setPilotYOffset_m (double y)
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{
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FGViewer * view = get_current_view();
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if (view != 0) {
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view->setYOffset_m(y);
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}
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}
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double
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FGViewMgr::getPilotZOffset_m () const
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{
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const FGViewer * view = get_current_view();
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if (view != 0) {
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return ((FGViewer *)view)->getZOffset_m();
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} else {
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return 0;
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}
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}
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void
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FGViewMgr::setPilotZOffset_m (double z)
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{
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FGViewer * view = get_current_view();
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if (view != 0) {
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view->setZOffset_m(z);
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}
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}
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double
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FGViewMgr::getFOV_deg () const
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{
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const FGViewer * view = get_current_view();
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return (view == 0 ? 0 : view->get_fov());
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}
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void
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FGViewMgr::setFOV_deg (double fov)
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{
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FGViewer * view = get_current_view();
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if (view != 0)
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view->set_fov(fov);
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}
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double
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FGViewMgr::getNear_m () const
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{
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const FGViewer * view = get_current_view();
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return (view == 0 ? 0.5f : view->getNear_m());
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}
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void
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FGViewMgr::setNear_m (double near_m)
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{
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FGViewer * view = get_current_view();
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if (view != 0)
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view->setNear_m(near_m);
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}
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void
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FGViewMgr::setViewAxisLong (double axis)
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{
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axis_long = axis;
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}
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void
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FGViewMgr::setViewAxisLat (double axis)
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{
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axis_lat = axis;
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}
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void
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FGViewMgr::do_axes ()
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{
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// Take no action when hat is centered
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if ( ( axis_long < 0.01 ) &&
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( axis_long > -0.01 ) &&
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( axis_lat < 0.01 ) &&
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( axis_lat > -0.01 )
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)
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return;
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double viewDir = 999;
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/* Do all the quick and easy cases */
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if (axis_long < 0) { // Longitudinal axis forward
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if (axis_lat == axis_long)
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viewDir = fgGetDouble("/sim/view/config/front-left-direction-deg");
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else if (axis_lat == - axis_long)
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viewDir = fgGetDouble("/sim/view/config/front-right-direction-deg");
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else if (axis_lat == 0)
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viewDir = fgGetDouble("/sim/view/config/front-direction-deg");
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} else if (axis_long > 0) { // Longitudinal axis backward
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if (axis_lat == - axis_long)
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viewDir = fgGetDouble("/sim/view/config/back-left-direction-deg");
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else if (axis_lat == axis_long)
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viewDir = fgGetDouble("/sim/view/config/back-right-direction-deg");
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else if (axis_lat == 0)
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viewDir = fgGetDouble("/sim/view/config/back-direction-deg");
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} else if (axis_long == 0) { // Longitudinal axis neutral
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if (axis_lat < 0)
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viewDir = fgGetDouble("/sim/view/config/left-direction-deg");
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else if (axis_lat > 0)
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viewDir = fgGetDouble("/sim/view/config/right-direction-deg");
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else return; /* And assertion failure maybe? */
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}
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// Do all the difficult cases
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if ( viewDir > 900 )
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viewDir = SGD_RADIANS_TO_DEGREES * atan2 ( -axis_lat, -axis_long );
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if ( viewDir < -1 ) viewDir += 360;
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get_current_view()->setGoalHeadingOffset_deg(viewDir);
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}
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