X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FMain%2Fviewer.cxx;h=4b77efb8cbd4c28a09797d020a140903d3c08ad7;hb=f6e80608797fa9ab9d44444eb7b031e412b83067;hp=707d3801412cb0736d3b15fc55810319a545c4df;hpb=08fd9cc36d897e9754e93a036dd835fae192b964;p=flightgear.git diff --git a/src/Main/viewer.cxx b/src/Main/viewer.cxx index 707d38014..4b77efb8c 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 // @@ -24,29 +26,724 @@ #include +#include "fg_props.hxx" + #ifdef HAVE_CONFIG_H # include #endif #include +#include +#include +#include +#include + +#include + +#include +#include
+#include +#include #include "viewer.hxx" + +////////////////////////////////////////////////////////////////// +// Norman's Optimized matrix rotators! // +////////////////////////////////////////////////////////////////// -// Constructor -FGViewer::FGViewer( void ): -fov(55.0) + +// 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 ) { + // 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 ; + + // multiply matrices + for ( int j = 0 ; j < 3 ; j++ ) { + dst[0][j] = mat2[0][0] * mat1[0][j] + + mat2[0][1] * mat1[1][j] + + mat2[0][2] * mat1[2][j]; + + dst[1][j] = mat2[1][0] * mat1[0][j] + + mat2[1][1] * mat1[1][j] + + mat2[1][2] * mat1[2][j]; + + dst[2][j] = mat2[2][0] * mat1[0][j] + + mat2[2][1] * mat1[1][j] + + mat2[2][2] * mat1[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; } -// Update the view parameters -void FGViewer::update() { - FG_LOG( FG_VIEW, FG_ALERT, "Shouldn't ever see this" ); - exit(-1); +//////////////////////////////////////////////////////////////////////// +// Implementation of FGViewer. +//////////////////////////////////////////////////////////////////////// + +// Constructor +FGViewer::FGViewer( fgViewType Type, bool from_model, int from_model_index, bool at_model, int at_model_index, double x_offset_m, double y_offset_m, double z_offset_m, double near_m ): + _scaling_type(FG_SCALING_MAX), + _fov_deg(55.0), + _dirty(true), + _lon_deg(0), + _lat_deg(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), + _heading_offset_deg(0), + _pitch_offset_deg(0), + _roll_offset_deg(0), + _goal_heading_offset_deg(0.0), + _goal_pitch_offset_deg(0.0) +{ + 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; + _x_offset_m = x_offset_m; + _y_offset_m = y_offset_m; + _z_offset_m = 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 = (FGLocation *) globals->get_aircraft_model()->get3DModel()->getFGLocation(); + else + _location = (FGLocation *) new FGLocation; + + if ( _type == FG_LOOKAT ) { + if ( _at_model ) + _target_location = (FGLocation *) globals->get_aircraft_model()->get3DModel()->getFGLocation(); + else + _target_location = (FGLocation *) new FGLocation; + } +} + +void +FGViewer::bind () +{ +} + +void +FGViewer::unbind () +{ +} + +void +FGViewer::setType ( int type ) +{ + if (type == 0) + _type = FG_LOOKFROM; + if (type == 1) + _type = FG_LOOKAT; +} + +void +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; +} + +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::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; +} + +float * +FGViewer::getRelativeViewPos () +{ + if (_dirty) + recalc(); + return _relative_view_pos; +} + +float * +FGViewer::getZeroElevViewPos () +{ + if (_dirty) + recalc(); + return _zero_elev_view_pos; +} + +void +FGViewer::updateFromModelLocation (FGLocation * location) +{ + sgCopyMat4(LOCAL, location->getCachedTransformMatrix()); +} + +void +FGViewer::recalcOurOwnLocation (FGLocation * location, double lon_deg, double lat_deg, double alt_ft, + double roll_deg, double pitch_deg, double heading_deg) +{ + // update from our own data... + location->setPosition( lon_deg, lat_deg, alt_ft ); + location->setOrientation( roll_deg, pitch_deg, heading_deg ); + sgCopyMat4(LOCAL, location->getTransformMatrix()); +} + +// 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(); + } + + set_clean(); +} + +// recalculate for LookFrom view type... +void +FGViewer::recalcLookFrom () +{ + + sgVec3 right, forward; + sgVec3 eye_pos; + sgVec3 position_offset; // eye position offsets (xyz) + + // LOOKFROM mode... + + // 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 ); + + // 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 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); + +} + +void +FGViewer::recalcLookAt () +{ + + sgVec3 right; + sgVec3 eye_pos, at_pos; + sgVec3 position_offset; // eye 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 + updateFromModelLocation(_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(), 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] ); + + // Note that when in "lookat" view the "world up" vector is always applied + // to the viewer. World up is based on verticle at a given lon/lat (see + // matrix "UP" above). + + // Orientation Offsets matrix + MakeVIEW_OFFSET( VIEW_OFFSET, + (_heading_offset_deg -_heading_deg) * SG_DEGREES_TO_RADIANS, _world_up, + _pitch_offset_deg * SG_DEGREES_TO_RADIANS, right ); + + // add in the Orientation Offsets here + sgSetVec3( position_offset, _x_offset_m, _y_offset_m, _z_offset_m ); + sgXformVec3( position_offset, position_offset, UP); + + sgXformVec3( position_offset, position_offset, VIEW_OFFSET ); + + // add the Position offsets from object to the eye position + sgAddVec3( eye_pos, eye_pos, 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 FGLocation... +void +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()); + 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); +} + +double +FGViewer::get_h_fov() +{ + switch (_scaling_type) { + case FG_SCALING_WIDTH: // h_fov == fov + return _fov_deg; + case FG_SCALING_MAX: + if (_aspect_ratio < 1.0) { + // h_fov == fov + return _fov_deg; + } else { + // v_fov == fov + 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 (_scaling_type) { + case FG_SCALING_WIDTH: // h_fov == fov + 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) { + // h_fov == fov + return atan(tan(_fov_deg/2 * SG_DEGREES_TO_RADIANS) * _aspect_ratio) * + SG_RADIANS_TO_DEGREES * 2; + } else { + // v_fov == fov + return _fov_deg; + } + default: + assert(false); + } + return 0.0; +} + +void +FGViewer::update (double dt) +{ + int i; + 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.headingoffset towards + // current_view.goal_view_offset + if ( _goal_heading_offset_deg > _heading_offset_deg ) + { + if ( _goal_heading_offset_deg - _heading_offset_deg < 180 ){ + incHeadingOffset_deg( 0.5 ); + } else { + incHeadingOffset_deg( -0.5 ); + } + } else { + if ( _heading_offset_deg - _goal_heading_offset_deg < 180 ){ + incHeadingOffset_deg( -0.5 ); + } else { + incHeadingOffset_deg( 0.5 ); + } + } + if ( _heading_offset_deg > 360 ) { + incHeadingOffset_deg( -360 ); + } else if ( _heading_offset_deg < 0 ) { + incHeadingOffset_deg( 360 ); + } + } + } + + 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.pitch_offset_deg towards + // current_view.goal_pitch_offset + if ( _goal_pitch_offset_deg > _pitch_offset_deg ) + { + incPitchOffset_deg( 1.0 ); + } else { + incPitchOffset_deg( -1.0 ); + } + if ( _pitch_offset_deg > 90 ) { + setPitchOffset_deg(90); + } else if ( _pitch_offset_deg < -90 ) { + setPitchOffset_deg( -90 ); + } + } + } +}