#endif
#include <simgear/debug/logstream.hxx>
+#include <simgear/constants.h>
+#include <simgear/math/point3d.hxx>
+#include <simgear/math/polar3d.hxx>
+#include <simgear/math/sg_geodesy.hxx>
+
+#include <Scenery/scenery.hxx>
#include "viewer.hxx"
-// Constructor
-FGViewer::FGViewer( void ):
-fov(55.0)
+\f
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGViewPoint.
+////////////////////////////////////////////////////////////////////////
+
+FGViewPoint::FGViewPoint ()
+ : _dirty(true),
+ _lon_deg(0),
+ _lat_deg(0),
+ _alt_ft(0)
{
}
+FGViewPoint::~FGViewPoint ()
+{
+}
-// Update the view parameters
-void FGViewer::update() {
- SG_LOG( SG_VIEW, SG_ALERT, "Shouldn't ever see this" );
+void
+FGViewPoint::setPosition (double lon_deg, double lat_deg, double alt_ft)
+{
+ _dirty = true;
+ _lon_deg = lon_deg;
+ _lat_deg = lat_deg;
+ _alt_ft = alt_ft;
+}
+
+const double *
+FGViewPoint::getAbsoluteViewPos () const
+{
+ if (_dirty)
+ recalc();
+ return _absolute_view_pos;
+}
+
+const float *
+FGViewPoint::getRelativeViewPos () const
+{
+ if (_dirty)
+ recalc();
+ return _relative_view_pos;
+}
+
+const float *
+FGViewPoint::getZeroElevViewPos () const
+{
+ if (_dirty)
+ recalc();
+ return _zero_elev_view_pos;
+}
+
+void
+FGViewPoint::recalc () const
+{
+ double sea_level_radius_m;
+ double lat_geoc_rad;
+
+ // Convert from geodetic to geocentric
+ // coordinates.
+ sgGeodToGeoc(_lat_deg * SGD_DEGREES_TO_RADIANS,
+ _alt_ft * SG_FEET_TO_METER,
+ &sea_level_radius_m,
+ &lat_geoc_rad);
+
+ // Calculate the cartesian coordinates
+ // of point directly below at sea level.
+ Point3D p = Point3D(_lon_deg * SG_DEGREES_TO_RADIANS,
+ lat_geoc_rad,
+ sea_level_radius_m);
+ Point3D tmp = sgPolarToCart3d(p) - scenery.get_next_center();
+ sgSetVec3(_zero_elev_view_pos, tmp[0], tmp[1], tmp[2]);
+
+ // Calculate the absolute view position
+ // in fgfs coordinates.
+ p.setz(p.radius() + _alt_ft * SG_FEET_TO_METER);
+ tmp = sgPolarToCart3d(p);
+ sgdSetVec3(_absolute_view_pos, tmp[0], tmp[1], tmp[2]);
+
+ // Calculate the relative view position
+ // from the scenery center.
+ sgdVec3 scenery_center;
+ sgdSetVec3(scenery_center,
+ scenery.get_next_center().x(),
+ scenery.get_next_center().y(),
+ scenery.get_next_center().z());
+ sgdVec3 view_pos;
+ sgdSubVec3(view_pos, _absolute_view_pos, scenery_center);
+ sgSetVec3(_relative_view_pos, view_pos);
+}
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGViewer.
+////////////////////////////////////////////////////////////////////////
+
+// Constructor
+FGViewer::FGViewer( void ):
+ scalingType(FG_SCALING_MAX),
+ fov(55.0),
+ view_offset(0.0),
+ goal_view_offset(0.0),
+ view_tilt(0.0),
+ goal_view_tilt(0.0)
+{
+ sgSetVec3( pilot_offset, 0.0, 0.0, 0.0 );
+ sgdZeroVec3(geod_view_pos);
+ sgdZeroVec3(abs_view_pos);
+ sea_level_radius = SG_EQUATORIAL_RADIUS_M;
+ //a reasonable guess for init, so that the math doesn't blow up
}
// Destructor
FGViewer::~FGViewer( void ) {
}
+
+void
+FGViewer::init ()
+{
+}
+
+void
+FGViewer::bind ()
+{
+}
+
+void
+FGViewer::unbind ()
+{
+}
+
+double
+FGViewer::get_h_fov()
+{
+ switch (scalingType) {
+ case FG_SCALING_WIDTH: // h_fov == fov
+ return fov;
+ case FG_SCALING_MAX:
+ if (aspect_ratio < 1.0) {
+ // h_fov == fov
+ return fov;
+ } else {
+ // v_fov == fov
+ return atan(tan(fov/2 * SG_DEGREES_TO_RADIANS) / aspect_ratio) *
+ SG_RADIANS_TO_DEGREES * 2;
+ }
+ default:
+ assert(false);
+ }
+}
+
+double
+FGViewer::get_v_fov()
+{
+ switch (scalingType) {
+ case FG_SCALING_WIDTH: // h_fov == fov
+ return atan(tan(fov/2 * SG_DEGREES_TO_RADIANS) * aspect_ratio) *
+ SG_RADIANS_TO_DEGREES * 2;
+ case FG_SCALING_MAX:
+ if (aspect_ratio < 1.0) {
+ // h_fov == fov
+ return atan(tan(fov/2 * SG_DEGREES_TO_RADIANS) * aspect_ratio) *
+ SG_RADIANS_TO_DEGREES * 2;
+ } else {
+ // v_fov == fov
+ return fov;
+ }
+ default:
+ assert(false);
+ }
+}
+
+void
+FGViewer::update (int dt)
+{
+ int i;
+ for ( i = 0; i < dt; i++ ) {
+ if ( fabs(get_goal_view_offset() - get_view_offset()) < 0.05 ) {
+ set_view_offset( get_goal_view_offset() );
+ break;
+ } else {
+ // move current_view.view_offset towards
+ // current_view.goal_view_offset
+ if ( get_goal_view_offset() > get_view_offset() )
+ {
+ if ( get_goal_view_offset() - get_view_offset() < SGD_PI ){
+ inc_view_offset( 0.01 );
+ } else {
+ inc_view_offset( -0.01 );
+ }
+ } else {
+ if ( get_view_offset() - get_goal_view_offset() < SGD_PI ){
+ inc_view_offset( -0.01 );
+ } else {
+ inc_view_offset( 0.01 );
+ }
+ }
+ if ( get_view_offset() > SGD_2PI ) {
+ inc_view_offset( -SGD_2PI );
+ } else if ( get_view_offset() < 0 ) {
+ inc_view_offset( SGD_2PI );
+ }
+ }
+ }
+
+ for ( i = 0; i < dt; i++ ) {
+ if ( fabs(get_goal_view_tilt() - get_view_tilt()) < 0.05 ) {
+ set_view_tilt( get_goal_view_tilt() );
+ break;
+ } else {
+ // move current_view.view_tilt towards
+ // current_view.goal_view_tilt
+ if ( get_goal_view_tilt() > get_view_tilt() )
+ {
+ if ( get_goal_view_tilt() - get_view_tilt() < SGD_PI ){
+ inc_view_tilt( 0.01 );
+ } else {
+ inc_view_tilt( -0.01 );
+ }
+ } else {
+ if ( get_view_tilt() - get_goal_view_tilt() < SGD_PI ){
+ inc_view_tilt( -0.01 );
+ } else {
+ inc_view_tilt( 0.01 );
+ }
+ }
+ if ( get_view_tilt() > SGD_2PI ) {
+ inc_view_tilt( -SGD_2PI );
+ } else if ( get_view_tilt() < 0 ) {
+ inc_view_tilt( SGD_2PI );
+ }
+ }
+ }
+}
projects / flightgear.git / blobdiff