X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FMain%2Fviewer.cxx;h=67f4cec18d12a88b35522953ff736f9a9f4e00ae;hb=b3e969726249e772da4c9d1aa6eb212e6472aed3;hp=e1e7782fbd99e0ffc649b1be1f0ef77a2554159c;hpb=efe559ead40d99e8834138b62060080117de317f;p=flightgear.git diff --git a/src/Main/viewer.cxx b/src/Main/viewer.cxx index e1e7782fb..67f4cec18 100644 --- a/src/Main/viewer.cxx +++ b/src/Main/viewer.cxx @@ -2,6 +2,8 @@ // // Written by Curtis Olson, started August 1997. // overhaul started October 2000. +// partially rewritten by Jim Wilson jim@kelcomaine.com using interface +// by David Megginson March 2002 // // Copyright (C) 1997 - 2000 Curtis L. Olson - curt@flightgear.org // @@ -24,6 +26,8 @@ #include +#include "fg_props.hxx" + #ifdef HAVE_CONFIG_H # include #endif @@ -33,56 +37,500 @@ #include #include #include +#include +#include +#include +#include
#include +#include #include "viewer.hxx" - +////////////////////////////////////////////////////////////////// +// Norman's Optimized matrix rotators! // +////////////////////////////////////////////////////////////////// + + +// Since these are pure rotation matrices we can save some bookwork +// by considering them to be 3x3 until the very end -- NHV +static void MakeVIEW_OFFSET( sgMat4 dst, + const float angle1, const sgVec3 axis1, + const float angle2, const sgVec3 axis2, + const float angle3, const sgVec3 axis3 ) +{ + // make rotmatrix1 from angle and axis + float s = (float) sin ( angle1 ) ; + float c = (float) cos ( angle1 ) ; + float t = SG_ONE - c ; + + sgMat3 mat1; + float tmp = t * axis1[0]; + mat1[0][0] = tmp * axis1[0] + c ; + mat1[0][1] = tmp * axis1[1] + s * axis1[2] ; + mat1[0][2] = tmp * axis1[2] - s * axis1[1] ; + + tmp = t * axis1[1]; + mat1[1][0] = tmp * axis1[0] - s * axis1[2] ; + mat1[1][1] = tmp * axis1[1] + c ; + mat1[1][2] = tmp * axis1[2] + s * axis1[0] ; + + tmp = t * axis1[2]; + mat1[2][0] = tmp * axis1[0] + s * axis1[1] ; + mat1[2][1] = tmp * axis1[1] - s * axis1[0] ; + mat1[2][2] = tmp * axis1[2] + c ; + + // make rotmatrix2 from angle and axis + s = (float) sin ( angle2 ) ; + c = (float) cos ( angle2 ) ; + t = SG_ONE - c ; + + sgMat3 mat2; + tmp = t * axis2[0]; + mat2[0][0] = tmp * axis2[0] + c ; + mat2[0][1] = tmp * axis2[1] + s * axis2[2] ; + mat2[0][2] = tmp * axis2[2] - s * axis2[1] ; + + tmp = t * axis2[1]; + mat2[1][0] = tmp * axis2[0] - s * axis2[2] ; + mat2[1][1] = tmp * axis2[1] + c ; + mat2[1][2] = tmp * axis2[2] + s * axis2[0] ; + + tmp = t * axis2[2]; + mat2[2][0] = tmp * axis2[0] + s * axis2[1] ; + mat2[2][1] = tmp * axis2[1] - s * axis2[0] ; + mat2[2][2] = tmp * axis2[2] + c ; + + + // make rotmatrix3 from angle and axis (roll) + s = (float) sin ( angle3 ) ; + c = (float) cos ( angle3 ) ; + t = SG_ONE - c ; + + sgMat3 mat3; + tmp = t * axis3[0]; + mat3[0][0] = tmp * axis3[0] + c ; + mat3[0][1] = tmp * axis3[1] + s * axis3[2] ; + mat3[0][2] = tmp * axis3[2] - s * axis3[1] ; + + tmp = t * axis2[1]; + mat3[1][0] = tmp * axis3[0] - s * axis3[2] ; + mat3[1][1] = tmp * axis3[1] + c ; + mat3[1][2] = tmp * axis3[2] + s * axis3[0] ; + + tmp = t * axis3[2]; + mat3[2][0] = tmp * axis3[0] + s * axis3[1] ; + mat3[2][1] = tmp * axis3[1] - s * axis3[0] ; + mat3[2][2] = tmp * axis3[2] + c ; + + sgMat3 matt; + + // multiply matrices + for ( int j = 0 ; j < 3 ; j++ ) { + matt[0][j] = mat2[0][0] * mat1[0][j] + + mat2[0][1] * mat1[1][j] + + mat2[0][2] * mat1[2][j]; + + matt[1][j] = mat2[1][0] * mat1[0][j] + + mat2[1][1] * mat1[1][j] + + mat2[1][2] * mat1[2][j]; + + matt[2][j] = mat2[2][0] * mat1[0][j] + + mat2[2][1] * mat1[1][j] + + mat2[2][2] * mat1[2][j]; + } + + // multiply matrices + for ( int j = 0 ; j < 3 ; j++ ) { + dst[0][j] = mat3[0][0] * matt[0][j] + + mat3[0][1] * matt[1][j] + + mat3[0][2] * matt[2][j]; + + dst[1][j] = mat3[1][0] * matt[0][j] + + mat3[1][1] * matt[1][j] + + mat3[1][2] * matt[2][j]; + + dst[2][j] = mat3[2][0] * matt[0][j] + + mat3[2][1] * matt[1][j] + + mat3[2][2] * matt[2][j]; + } + // fill in 4x4 matrix elements + dst[0][3] = SG_ZERO; + dst[1][3] = SG_ZERO; + dst[2][3] = SG_ZERO; + dst[3][0] = SG_ZERO; + dst[3][1] = SG_ZERO; + dst[3][2] = SG_ZERO; + dst[3][3] = SG_ONE; +} + + //////////////////////////////////////////////////////////////////////// -// Implementation of FGViewPoint. +// Implementation of FGViewer. //////////////////////////////////////////////////////////////////////// -FGViewPoint::FGViewPoint () - : _dirty(true), +// Constructor... +FGViewer::FGViewer( fgViewType Type, bool from_model, int from_model_index, + bool at_model, int at_model_index, + double damp_roll, double damp_pitch, double damp_heading, + double x_offset_m, double y_offset_m, double z_offset_m, + double heading_offset_deg, double pitch_offset_deg, + double roll_offset_deg, double fov_deg, + double target_x_offset_m, double target_y_offset_m, + double target_z_offset_m, double near_m, bool internal ): + _dirty(true), _lon_deg(0), _lat_deg(0), - _alt_ft(0) + _alt_ft(0), + _target_lon_deg(0), + _target_lat_deg(0), + _target_alt_ft(0), + _roll_deg(0), + _pitch_deg(0), + _heading_deg(0), + _damp_sync(0), + _damp_roll(0), + _damp_pitch(0), + _damp_heading(0), + _scaling_type(FG_SCALING_MAX) +{ + sgdZeroVec3(_absolute_view_pos); + _type = Type; + _from_model = from_model; + _from_model_index = from_model_index; + _at_model = at_model; + _at_model_index = at_model_index; + + _internal = internal; + + if (damp_roll > 0.0) + _damp_roll = 1.0 / pow(10.0, fabs(damp_roll)); + if (damp_pitch > 0.0) + _damp_pitch = 1.0 / pow(10.0, fabs(damp_pitch)); + if (damp_heading > 0.0) + _damp_heading = 1.0 / pow(10.0, fabs(damp_heading)); + + _x_offset_m = x_offset_m; + _y_offset_m = y_offset_m; + _z_offset_m = z_offset_m; + _heading_offset_deg = heading_offset_deg; + _pitch_offset_deg = pitch_offset_deg; + _roll_offset_deg = roll_offset_deg; + _goal_heading_offset_deg = heading_offset_deg; + _goal_pitch_offset_deg = pitch_offset_deg; + _goal_roll_offset_deg = roll_offset_deg; + if (fov_deg > 0) { + _fov_deg = fov_deg; + } else { + _fov_deg = 55; + } + _target_x_offset_m = target_x_offset_m; + _target_y_offset_m = target_y_offset_m; + _target_z_offset_m = target_z_offset_m; + _ground_level_nearplane_m = near_m; + // a reasonable guess for init, so that the math doesn't blow up +} + + +// Destructor +FGViewer::~FGViewer( void ) { +} + +void +FGViewer::init () +{ + if ( _from_model ) + _location = (SGLocation *) globals->get_aircraft_model()->get3DModel()->getSGLocation(); + else + _location = (SGLocation *) new SGLocation; + + if ( _type == FG_LOOKAT ) { + if ( _at_model ) + _target_location = (SGLocation *) globals->get_aircraft_model()->get3DModel()->getSGLocation(); + else + _target_location = (SGLocation *) new SGLocation; + } +} + +void +FGViewer::bind () +{ +} + +void +FGViewer::unbind () { } -FGViewPoint::~FGViewPoint () +void +FGViewer::setType ( int type ) +{ + if (type == 0) + _type = FG_LOOKFROM; + if (type == 1) + _type = FG_LOOKAT; +} + +void +FGViewer::setInternal ( bool internal ) { + _internal = internal; } void -FGViewPoint::setPosition (double lon_deg, double lat_deg, double alt_ft) +FGViewer::setLongitude_deg (double lon_deg) { _dirty = true; _lon_deg = lon_deg; +} + +void +FGViewer::setLatitude_deg (double lat_deg) +{ + _dirty = true; _lat_deg = lat_deg; +} + +void +FGViewer::setAltitude_ft (double alt_ft) +{ + _dirty = true; _alt_ft = alt_ft; } -const double * -FGViewPoint::getAbsoluteViewPos () const +void +FGViewer::setPosition (double lon_deg, double lat_deg, double alt_ft) +{ + _dirty = true; + _lon_deg = lon_deg; + _lat_deg = lat_deg; + _alt_ft = alt_ft; +} + +void +FGViewer::setTargetLongitude_deg (double lon_deg) +{ + _dirty = true; + _target_lon_deg = lon_deg; +} + +void +FGViewer::setTargetLatitude_deg (double lat_deg) +{ + _dirty = true; + _target_lat_deg = lat_deg; +} + +void +FGViewer::setTargetAltitude_ft (double alt_ft) +{ + _dirty = true; + _target_alt_ft = alt_ft; +} + +void +FGViewer::setTargetPosition (double lon_deg, double lat_deg, double alt_ft) +{ + _dirty = true; + _target_lon_deg = lon_deg; + _target_lat_deg = lat_deg; + _target_alt_ft = alt_ft; +} + +void +FGViewer::setRoll_deg (double roll_deg) +{ + _dirty = true; + _roll_deg = roll_deg; +} + +void +FGViewer::setPitch_deg (double pitch_deg) +{ + _dirty = true; + _pitch_deg = pitch_deg; +} + +void +FGViewer::setHeading_deg (double heading_deg) +{ + _dirty = true; + _heading_deg = heading_deg; +} + +void +FGViewer::setOrientation (double roll_deg, double pitch_deg, double heading_deg) +{ + _dirty = true; + _roll_deg = roll_deg; + _pitch_deg = pitch_deg; + _heading_deg = heading_deg; +} + +void +FGViewer::setTargetRoll_deg (double target_roll_deg) +{ + _dirty = true; + _target_roll_deg = target_roll_deg; +} + +void +FGViewer::setTargetPitch_deg (double target_pitch_deg) +{ + _dirty = true; + _target_pitch_deg = target_pitch_deg; +} + +void +FGViewer::setTargetHeading_deg (double target_heading_deg) +{ + _dirty = true; + _target_heading_deg = target_heading_deg; +} + +void +FGViewer::setTargetOrientation (double target_roll_deg, double target_pitch_deg, double target_heading_deg) +{ + _dirty = true; + _target_roll_deg = target_roll_deg; + _target_pitch_deg = target_pitch_deg; + _target_heading_deg = target_heading_deg; +} + +void +FGViewer::setXOffset_m (double x_offset_m) +{ + _dirty = true; + _x_offset_m = x_offset_m; +} + +void +FGViewer::setYOffset_m (double y_offset_m) +{ + _dirty = true; + _y_offset_m = y_offset_m; +} + +void +FGViewer::setZOffset_m (double z_offset_m) +{ + _dirty = true; + _z_offset_m = z_offset_m; +} + +void +FGViewer::setTargetXOffset_m (double target_x_offset_m) +{ + _dirty = true; + _target_x_offset_m = target_x_offset_m; +} + +void +FGViewer::setTargetYOffset_m (double target_y_offset_m) +{ + _dirty = true; + _target_y_offset_m = target_y_offset_m; +} + +void +FGViewer::setTargetZOffset_m (double target_z_offset_m) +{ + _dirty = true; + _target_z_offset_m = target_z_offset_m; +} + +void +FGViewer::setPositionOffsets (double x_offset_m, double y_offset_m, double z_offset_m) +{ + _dirty = true; + _x_offset_m = x_offset_m; + _y_offset_m = y_offset_m; + _z_offset_m = z_offset_m; +} + +void +FGViewer::setRollOffset_deg (double roll_offset_deg) +{ + _dirty = true; + _roll_offset_deg = roll_offset_deg; +} + +void +FGViewer::setPitchOffset_deg (double pitch_offset_deg) +{ + _dirty = true; + _pitch_offset_deg = pitch_offset_deg; +} + +void +FGViewer::setHeadingOffset_deg (double heading_offset_deg) +{ + _dirty = true; + _heading_offset_deg = heading_offset_deg; +} + +void +FGViewer::setGoalRollOffset_deg (double goal_roll_offset_deg) +{ + _dirty = true; + _goal_roll_offset_deg = goal_roll_offset_deg; +} + +void +FGViewer::setGoalPitchOffset_deg (double goal_pitch_offset_deg) +{ + _dirty = true; + _goal_pitch_offset_deg = goal_pitch_offset_deg; + if ( _goal_pitch_offset_deg < -90 ) { + _goal_pitch_offset_deg = -90.0; + } + if ( _goal_pitch_offset_deg > 90.0 ) { + _goal_pitch_offset_deg = 90.0; + } + +} + +void +FGViewer::setGoalHeadingOffset_deg (double goal_heading_offset_deg) +{ + _dirty = true; + _goal_heading_offset_deg = goal_heading_offset_deg; + while ( _goal_heading_offset_deg < 0.0 ) { + _goal_heading_offset_deg += 360; + } + while ( _goal_heading_offset_deg > 360 ) { + _goal_heading_offset_deg -= 360; + } +} + +void +FGViewer::setOrientationOffsets (double roll_offset_deg, double pitch_offset_deg, double heading_offset_deg) +{ + _dirty = true; + _roll_offset_deg = roll_offset_deg; + _pitch_offset_deg = pitch_offset_deg; + _heading_offset_deg = heading_offset_deg; +} + +double * +FGViewer::get_absolute_view_pos () { if (_dirty) recalc(); return _absolute_view_pos; } -const float * -FGViewPoint::getRelativeViewPos () const +float * +FGViewer::getRelativeViewPos () { if (_dirty) recalc(); return _relative_view_pos; } -const float * -FGViewPoint::getZeroElevViewPos () const +float * +FGViewer::getZeroElevViewPos () { if (_dirty) recalc(); @@ -90,186 +538,418 @@ FGViewPoint::getZeroElevViewPos () const } void -FGViewPoint::recalc () const +FGViewer::updateFromModelLocation (SGLocation * location) { - double sea_level_radius_m; - double lat_geoc_rad; + sgCopyMat4(LOCAL, location->getCachedTransformMatrix()); +} - // 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); +void +FGViewer::updateAtModelLocation (SGLocation * location) +{ + sgCopyMat4(ATLOCAL, + location->getCachedTransformMatrix()); +} - // 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_center(); - sgSetVec3(_zero_elev_view_pos, tmp[0], tmp[1], tmp[2]); +void +FGViewer::recalcOurOwnLocation (SGLocation * location, double lon_deg, double lat_deg, double alt_ft, + double roll_deg, double pitch_deg, double heading_deg) +{ + // update from our own data... + dampEyeData(roll_deg, pitch_deg, heading_deg); + location->setPosition( lon_deg, lat_deg, alt_ft ); + location->setOrientation( roll_deg, pitch_deg, heading_deg ); + sgCopyMat4(LOCAL, + location->getTransformMatrix(globals->get_scenery()->get_center())); +} - // 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]); +// recalc() is done every time one of the setters is called (making the +// cached data "dirty") on the next "get". It calculates all the outputs +// for viewer. +void +FGViewer::recalc () +{ + if (_type == FG_LOOKFROM) { + recalcLookFrom(); + } else { + recalcLookAt(); + } - // Calculate the relative view position - // from the scenery center. - sgdVec3 scenery_center; - sgdSetVec3(scenery_center, - scenery.get_center().x(), - scenery.get_center().y(), - scenery.get_center().z()); - sgdVec3 view_pos; - sgdSubVec3(view_pos, _absolute_view_pos, scenery_center); - sgSetVec3(_relative_view_pos, view_pos); + set_clean(); } +// recalculate for LookFrom view type... +void +FGViewer::recalcLookFrom () +{ + + sgVec3 right, forward; + // sgVec3 eye_pos; + sgVec3 position_offset; // eye position offsets (xyz) - -//////////////////////////////////////////////////////////////////////// -// Implementation of FGViewer. -//////////////////////////////////////////////////////////////////////// + // LOOKFROM mode... -// 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 -} + // Update location data... + if ( _from_model ) { + // update or data from model location + updateFromModelLocation(_location); + } else { + // update from our own data... + recalcOurOwnLocation( _location, _lon_deg, _lat_deg, _alt_ft, + _roll_deg, _pitch_deg, _heading_deg ); + } + // copy data from location class to local items... + copyLocationData(); + + // make sg vectors view up, right and forward vectors from LOCAL + sgSetVec3( _view_up, LOCAL[2][0], LOCAL[2][1], LOCAL[2][2] ); + sgSetVec3( right, LOCAL[1][0], LOCAL[1][1], LOCAL[1][2] ); + sgSetVec3( forward, -LOCAL[0][0], -LOCAL[0][1], -LOCAL[0][2] ); + + // Note that when in "lookfrom" view the "view up" vector is always applied + // to the viewer. View up is based on verticle of the aircraft itself. (see + // "LOCAL" matrix above) + + // Orientation Offsets matrix + MakeVIEW_OFFSET( VIEW_OFFSET, + _heading_offset_deg * SG_DEGREES_TO_RADIANS, _view_up, + _pitch_offset_deg * SG_DEGREES_TO_RADIANS, right, + _roll_offset_deg * SG_DEGREES_TO_RADIANS, forward ); + + // Make the VIEW matrix. + sgSetVec4(VIEW[0], right[0], right[1], right[2],SG_ZERO); + sgSetVec4(VIEW[1], forward[0], forward[1], forward[2],SG_ZERO); + sgSetVec4(VIEW[2], _view_up[0], _view_up[1], _view_up[2],SG_ZERO); + sgSetVec4(VIEW[3], SG_ZERO, SG_ZERO, SG_ZERO,SG_ONE); + + // rotate model or local matrix to get a matrix to apply Eye Position Offsets + sgMat4 VIEW_UP; // L0 forward L1 right L2 up + sgCopyVec4(VIEW_UP[0], LOCAL[1]); + sgCopyVec4(VIEW_UP[1], LOCAL[2]); + sgCopyVec4(VIEW_UP[2], LOCAL[0]); + sgZeroVec4(VIEW_UP[3]); + + // Eye Position Offsets to vector + sgSetVec3( position_offset, _x_offset_m, _y_offset_m, _z_offset_m ); + sgXformVec3( position_offset, position_offset, VIEW_UP); + + // add the offsets including rotations to the translation vector + sgAddVec3( _view_pos, position_offset ); + + // multiply the OFFSETS (for heading and pitch) into the VIEW + sgPostMultMat4(VIEW, VIEW_OFFSET); + + // add the position data to the matrix + sgSetVec4(VIEW[3], _view_pos[0], _view_pos[1], _view_pos[2],SG_ONE); -// Destructor -FGViewer::~FGViewer( void ) { } void -FGViewer::init () +FGViewer::recalcLookAt () { + + sgVec3 right, forward; + sgVec3 eye_pos, at_pos; + sgVec3 position_offset; // eye position offsets (xyz) + sgVec3 target_position_offset; // target position offsets (xyz) + + // The position vectors originate from the view point or target location + // depending on the type of view. + + // LOOKAT mode... + + // Update location data for target... + if ( _at_model ) { + // update or data from model location + updateAtModelLocation(_target_location); + } else { + // if not model then calculate our own target position... + recalcOurOwnLocation( _target_location, _target_lon_deg, _target_lat_deg, _target_alt_ft, + _target_roll_deg, _target_pitch_deg, _target_heading_deg ); + } + // calculate the "at" target object positon relative to eye or view's tile center... + sgdVec3 dVec3; + sgdSetVec3(dVec3, _location->get_tile_center()[0], _location->get_tile_center()[1], _location->get_tile_center()[2]); + sgdSubVec3(dVec3, + _target_location->get_absolute_view_pos(globals->get_scenery()->get_center()), + dVec3 ); + sgSetVec3(at_pos, dVec3[0], dVec3[1], dVec3[2]); + + // Update location data for eye... + if ( _from_model ) { + // update or data from model location + updateFromModelLocation(_location); + } else { + // update from our own data, just the rotation here... + recalcOurOwnLocation( _location, _lon_deg, _lat_deg, _alt_ft, + _roll_deg, _pitch_deg, _heading_deg ); + } + // save the eye positon... + sgCopyVec3(eye_pos, _location->get_view_pos()); + + // copy data from location class to local items... + copyLocationData(); + + // make sg vectors view up, right and forward vectors from LOCAL + sgSetVec3( _view_up, LOCAL[2][0], LOCAL[2][1], LOCAL[2][2] ); + sgSetVec3( right, LOCAL[1][0], LOCAL[1][1], LOCAL[1][2] ); + sgSetVec3( forward, -LOCAL[0][0], -LOCAL[0][1], -LOCAL[0][2] ); + + // rotate model or local matrix to get a matrix to apply Eye Position Offsets + sgMat4 VIEW_UP; // L0 forward L1 right L2 up + sgCopyVec4(VIEW_UP[0], LOCAL[1]); + sgCopyVec4(VIEW_UP[1], LOCAL[2]); + sgCopyVec4(VIEW_UP[2], LOCAL[0]); + sgZeroVec4(VIEW_UP[3]); + + // get Orientation Offsets matrix + MakeVIEW_OFFSET( VIEW_OFFSET, + (_heading_offset_deg - 180) * SG_DEGREES_TO_RADIANS, _view_up, + _pitch_offset_deg * SG_DEGREES_TO_RADIANS, right, + _roll_offset_deg * SG_DEGREES_TO_RADIANS, forward ); + + // add in the position offsets + sgSetVec3( position_offset, _y_offset_m, _x_offset_m, _z_offset_m ); + sgXformVec3( position_offset, position_offset, VIEW_UP); + + // apply the Orientation offsets + sgXformVec3( position_offset, position_offset, VIEW_OFFSET ); + + // add the Position offsets from object to the eye position + sgAddVec3( eye_pos, eye_pos, position_offset ); + + // add target offsets to at_position... + sgSetVec3(target_position_offset, _target_z_offset_m, _target_x_offset_m, + _target_y_offset_m ); + sgXformVec3(target_position_offset, target_position_offset, ATLOCAL); + sgAddVec3( at_pos, at_pos, target_position_offset); + + sgAddVec3( eye_pos, eye_pos, target_position_offset); + + // Make the VIEW matrix for a "LOOKAT". + sgMakeLookAtMat4( VIEW, eye_pos, at_pos, _view_up ); + } +// copy results from location class to viewer... +// FIXME: some of these should be changed to reference directly to SGLocation... void -FGViewer::bind () +FGViewer::copyLocationData() { + // Get our friendly vectors from the eye location... + sgCopyVec3(_zero_elev_view_pos, _location->get_zero_elev()); + sgCopyVec3(_relative_view_pos, _location->get_view_pos()); + sgdCopyVec3(_absolute_view_pos, + _location->get_absolute_view_pos(globals->get_scenery()->get_center())); + sgCopyMat4(UP, _location->getCachedUpMatrix()); + sgCopyVec3(_world_up, _location->get_world_up()); + // these are the vectors that the sun and moon code like to get... + sgCopyVec3(_surface_east, _location->get_surface_east()); + sgCopyVec3(_surface_south, _location->get_surface_south()); + + // Update viewer's postion data for the eye location... + _lon_deg = _location->getLongitude_deg(); + _lat_deg = _location->getLatitude_deg(); + _alt_ft = _location->getAltitudeASL_ft(); + _roll_deg = _location->getRoll_deg(); + _pitch_deg = _location->getPitch_deg(); + _heading_deg = _location->getHeading_deg(); + + // Update viewer's postion data for the target (at object) location + if (_type == FG_LOOKAT) { + _target_lon_deg = _target_location->getLongitude_deg(); + _target_lat_deg = _target_location->getLatitude_deg(); + _target_alt_ft = _target_location->getAltitudeASL_ft(); + _target_roll_deg = _target_location->getRoll_deg(); + _target_pitch_deg = _target_location->getPitch_deg(); + _target_heading_deg = _target_location->getHeading_deg(); + } + + // copy coordinates to outputs for viewer... + sgCopyVec3(_zero_elev, _zero_elev_view_pos); + sgCopyVec3(_view_pos, _relative_view_pos); } void -FGViewer::unbind () +FGViewer::dampEyeData (double &roll_deg, double &pitch_deg, double &heading_deg) { + const double interval = 0.01; + + static FGViewer *last_view = 0; + if (last_view != this) { + _damp_sync = 0.0; + _damped_roll_deg = roll_deg; + _damped_pitch_deg = pitch_deg; + _damped_heading_deg = heading_deg; + last_view = this; + return; + } + + if (_damp_sync < interval) { + if (_damp_roll > 0.0) + roll_deg = _damped_roll_deg; + if (_damp_pitch > 0.0) + pitch_deg = _damped_pitch_deg; + if (_damp_heading > 0.0) + heading_deg = _damped_heading_deg; + return; + } + + while (_damp_sync >= interval) { + _damp_sync -= interval; + + double d; + if (_damp_roll > 0.0) { + d = _damped_roll_deg - roll_deg; + if (d >= 180.0) + _damped_roll_deg -= 360.0; + else if (d < -180.0) + _damped_roll_deg += 360.0; + roll_deg = _damped_roll_deg = roll_deg * _damp_roll + _damped_roll_deg * (1 - _damp_roll); + } + + if (_damp_pitch > 0.0) { + d = _damped_pitch_deg - pitch_deg; + if (d >= 180.0) + _damped_pitch_deg -= 360.0; + else if (d < -180.0) + _damped_pitch_deg += 360.0; + pitch_deg = _damped_pitch_deg = pitch_deg * _damp_pitch + _damped_pitch_deg * (1 - _damp_pitch); + } + + if (_damp_heading > 0.0) { + d = _damped_heading_deg - heading_deg; + if (d >= 180.0) + _damped_heading_deg -= 360.0; + else if (d < -180.0) + _damped_heading_deg += 360.0; + heading_deg = _damped_heading_deg = heading_deg * _damp_heading + _damped_heading_deg * (1 - _damp_heading); + } + } } double FGViewer::get_h_fov() { - switch (scalingType) { + switch (_scaling_type) { case FG_SCALING_WIDTH: // h_fov == fov - return fov; + return _fov_deg; case FG_SCALING_MAX: - if (aspect_ratio < 1.0) { + if (_aspect_ratio < 1.0) { // h_fov == fov - return fov; + return _fov_deg; } else { // v_fov == fov - return atan(tan(fov/2 * SG_DEGREES_TO_RADIANS) / aspect_ratio) * + return atan(tan(_fov_deg/2 * SG_DEGREES_TO_RADIANS) / _aspect_ratio) * SG_RADIANS_TO_DEGREES * 2; } default: assert(false); } + return 0.0; } + + double FGViewer::get_v_fov() { - switch (scalingType) { + switch (_scaling_type) { case FG_SCALING_WIDTH: // h_fov == fov - return atan(tan(fov/2 * SG_DEGREES_TO_RADIANS) * aspect_ratio) * + return atan(tan(_fov_deg/2 * SG_DEGREES_TO_RADIANS) * _aspect_ratio) * SG_RADIANS_TO_DEGREES * 2; case FG_SCALING_MAX: - if (aspect_ratio < 1.0) { + if (_aspect_ratio < 1.0) { // h_fov == fov - return atan(tan(fov/2 * SG_DEGREES_TO_RADIANS) * aspect_ratio) * + return atan(tan(_fov_deg/2 * SG_DEGREES_TO_RADIANS) * _aspect_ratio) * SG_RADIANS_TO_DEGREES * 2; } else { // v_fov == fov - return fov; + return _fov_deg; } default: assert(false); } + return 0.0; } void -FGViewer::update (int dt) +FGViewer::update (double dt) { + _damp_sync += 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() ); + int dt_ms = int(dt * 1000); + for ( i = 0; i < dt_ms; i++ ) { + if ( fabs( _goal_heading_offset_deg - _heading_offset_deg) < 1 ) { + setHeadingOffset_deg( _goal_heading_offset_deg ); break; } else { - // move current_view.view_offset towards + // move current_view.headingoffset towards // current_view.goal_view_offset - if ( get_goal_view_offset() > get_view_offset() ) + if ( _goal_heading_offset_deg > _heading_offset_deg ) { - if ( get_goal_view_offset() - get_view_offset() < SGD_PI ){ - inc_view_offset( 0.01 ); + if ( _goal_heading_offset_deg - _heading_offset_deg < 180 ){ + incHeadingOffset_deg( 0.5 ); } else { - inc_view_offset( -0.01 ); + incHeadingOffset_deg( -0.5 ); } } else { - if ( get_view_offset() - get_goal_view_offset() < SGD_PI ){ - inc_view_offset( -0.01 ); + if ( _heading_offset_deg - _goal_heading_offset_deg < 180 ){ + incHeadingOffset_deg( -0.5 ); } else { - inc_view_offset( 0.01 ); + incHeadingOffset_deg( 0.5 ); } } - if ( get_view_offset() > SGD_2PI ) { - inc_view_offset( -SGD_2PI ); - } else if ( get_view_offset() < 0 ) { - inc_view_offset( SGD_2PI ); + if ( _heading_offset_deg > 360 ) { + incHeadingOffset_deg( -360 ); + } else if ( _heading_offset_deg < 0 ) { + incHeadingOffset_deg( 360 ); } } } - for ( i = 0; i < dt; i++ ) { - if ( fabs(get_goal_view_tilt() - get_view_tilt()) < 0.05 ) { - set_view_tilt( get_goal_view_tilt() ); + for ( i = 0; i < dt_ms; i++ ) { + if ( fabs( _goal_pitch_offset_deg - _pitch_offset_deg ) < 1 ) { + setPitchOffset_deg( _goal_pitch_offset_deg ); break; } else { - // move current_view.view_tilt towards - // current_view.goal_view_tilt - if ( get_goal_view_tilt() > get_view_tilt() ) + // move current_view.pitch_offset_deg towards + // current_view.goal_pitch_offset + if ( _goal_pitch_offset_deg > _pitch_offset_deg ) { - if ( get_goal_view_tilt() - get_view_tilt() < SGD_PI ){ - inc_view_tilt( 0.01 ); - } else { - inc_view_tilt( -0.01 ); - } + incPitchOffset_deg( 1.0 ); } else { - if ( get_view_tilt() - get_goal_view_tilt() < SGD_PI ){ - inc_view_tilt( -0.01 ); - } else { - inc_view_tilt( 0.01 ); - } + incPitchOffset_deg( -1.0 ); + } + if ( _pitch_offset_deg > 90 ) { + setPitchOffset_deg(90); + } else if ( _pitch_offset_deg < -90 ) { + setPitchOffset_deg( -90 ); + } + } + } + + + for ( i = 0; i < dt_ms; i++ ) { + if ( fabs( _goal_roll_offset_deg - _roll_offset_deg ) < 1 ) { + setRollOffset_deg( _goal_roll_offset_deg ); + break; + } else { + // move current_view.roll_offset_deg towards + // current_view.goal_roll_offset + if ( _goal_roll_offset_deg > _roll_offset_deg ) + { + incRollOffset_deg( 1.0 ); + } else { + incRollOffset_deg( -1.0 ); } - if ( get_view_tilt() > SGD_2PI ) { - inc_view_tilt( -SGD_2PI ); - } else if ( get_view_tilt() < 0 ) { - inc_view_tilt( SGD_2PI ); + if ( _roll_offset_deg > 90 ) { + setRollOffset_deg(90); + } else if ( _roll_offset_deg < -90 ) { + setRollOffset_deg( -90 ); } } } + }