fly/flightgear
1
0
Fork 0
Code Activity

Working on lookat views.

Browse source
This commit is contained in:
curt 2000-11-01 02:30:10 +00:00
parent 1b206c6202
commit 49aab2af8e
3 changed files with 88 additions and 88 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

73
src/Main/main.cxx
View file

@ -46,19 +46,19 @@
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h> /* for stat() */
# include <sys/stat.h> // for stat()
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h> /* for stat() */
# include <unistd.h> // for stat()
#endif
#include <plib/pu.h> // plib include
#include <plib/ssg.h> // plib include
#include <plib/pu.h>
#include <plib/ssg.h>
#ifdef ENABLE_AUDIO_SUPPORT
# include <plib/sl.h> // plib include
# include <plib/sm.h> // plib include
# include <plib/sl.h>
# include <plib/sm.h>
#endif
#include <simgear/constants.h> // for VERSION
@ -341,37 +341,42 @@ void fgRenderFrame( void ) {
sgVec3 po; // chase view pilot_offset
sgVec3 wup; // chase view world up
sgCopyVec3( po, chase_view->get_pilot_offset() );
sgCopyVec3( wup, chase_view->get_world_up() );
sgMat4 CXFM; // chase view + pilot offset xform
sgMakeRotMat4( CXFM, cur_fdm_state->get_Psi() * RAD_TO_DEG, wup );
sgVec3 npo; // new pilot offset after rotation
sgXformVec3( npo, po, CXFM );
sgSetVec3( po, 0.0, 0.0, 200.0 );
sgCopyVec3( wup, pilot_view->get_world_up() );
// sgMat4 CXFM; // chase view + pilot offset xform
// sgMakeRotMat4( CXFM, cur_fdm_state->get_Psi() * RAD_TO_DEG, wup );
// sgVec3 npo; // new pilot offset after rotation
// sgXformVec3( npo, po, CXFM );
chase_view->set_geod_view_pos( cur_fdm_state->get_Longitude(),
cur_fdm_state->get_Lat_geocentric(),
cur_fdm_state->get_Altitude() *
FEET_TO_METER );
chase_view->set_pilot_offset( npo[0], npo[1], npo[2] );
chase_view->set_sea_level_radius( cur_fdm_state->
get_Sea_level_radius() *
FEET_TO_METER );
chase_view->set_pilot_offset( po[0], po[1], po[2] );
sgVec3 negpo;
sgNegateVec3( negpo, npo );
sgNegateVec3( negpo, po );
chase_view->set_view_forward( negpo );
chase_view->set_view_up( wup );
#if 0
// this is a test, we are trying to match RPH and LookAt
// matrices
tv->set_geod_view_pos( cur_fdm_state->get_Longitude(),
cur_fdm_state->get_Lat_geocentric(),
cur_fdm_state->get_Altitude() *
FEET_TO_METER );
tv->set_sea_level_radius( cur_fdm_state->get_Sea_level_radius() *
FEET_TO_METER );
tv->set_view_forward( globals->get_current_view()->get_view_forward() );
tv->set_view_up( globals->get_current_view()->get_view_up() );
chase_view->set_geod_view_pos( cur_fdm_state->get_Longitude(),
cur_fdm_state->get_Lat_geocentric(),
cur_fdm_state->get_Altitude() *
FEET_TO_METER );
chase_view->set_sea_level_radius( cur_fdm_state->
get_Sea_level_radius() *
FEET_TO_METER );
chase_view->set_view_forward( pilot_view->get_view_forward() );
chase_view->set_view_up( pilot_view->get_view_up() );
#endif
sgMat4 rph;
sgCopyMat4( rph, globals->get_current_view()->get_VIEW_ROT() );
sgCopyMat4( rph, pilot_view->get_VIEW() );
cout << "RPH Matrix = " << endl;
int i, j;
for ( i = 0; i < 4; i++ ) {
@ -380,8 +385,9 @@ void fgRenderFrame( void ) {
}
cout << endl;
}
sgMat4 la;
sgCopyMat4( la, tv->get_VIEW_ROT() );
sgCopyMat4( la, chase_view->get_VIEW() );
cout << "LookAt Matrix = " << endl;
for ( i = 0; i < 4; i++ ) {
for ( j = 0; j < 4; j++ ) {
@ -389,10 +395,10 @@ void fgRenderFrame( void ) {
}
cout << endl;
}
#endif
// update view volume parameters
// cout << "before pilot_view update" << endl;
#if 0
if ( globals->get_options()->get_view_mode() ==
FGOptions::FG_VIEW_FOLLOW )
{
@ -403,6 +409,7 @@ void fgRenderFrame( void ) {
} else {
globals->get_current_view()->set_pilot_offset(0.0, 0.0, 0.0);
}
#endif
if ( ! fgPanelVisible() ) {
xglViewport( 0, 0 ,
@ -586,20 +593,18 @@ void fgRenderFrame( void ) {
ssgSetNearFar( 0.5f, 120000.0f );
}
if ( globals->get_options()->get_view_mode() ==
FGOptions::FG_VIEW_PILOT )
{
if ( globals->get_viewmgr()->get_current() == 0 ) {
// disable TuX
penguin_sel->select(0);
} else if ( globals->get_options()->get_view_mode() ==
FGOptions::FG_VIEW_FOLLOW )
{
} else {
// enable TuX and set up his position and orientation
penguin_sel->select(1);
FGViewerRPH *pilot_view =
(FGViewerRPH *)globals->get_viewmgr()->get_view( 0 );
sgMat4 sgTRANS;
sgMakeTransMat4( sgTRANS,
globals->get_current_view()->get_view_pos() );
sgMakeTransMat4( sgTRANS, pilot_view->get_view_pos() );
sgVec3 ownship_up;
sgSetVec3( ownship_up, 0.0, 0.0, 1.0);
@ -615,7 +620,7 @@ void fgRenderFrame( void ) {
// sgTUX = ( sgROT * pilot_view.VIEW_ROT ) * sgTRANS
sgMat4 sgTUX;
sgCopyMat4( sgTUX, sgROT );
sgPostMultMat4( sgTUX, globals->get_current_view()->get_VIEW_ROT() );
sgPostMultMat4( sgTUX, pilot_view->get_VIEW_ROT() );
sgPostMultMat4( sgTUX, sgTRANS );
sgCoord tuxpos;

12
src/Main/viewer.hxx
View file

@ -38,6 +38,14 @@
// Define a structure containing view information
class FGViewer {
public:
enum fgViewType {
FG_RPH = 0,
FG_LOOKAT = 1,
FG_HPR = 2
};
private:
// flag forcing a recalc of derived view parameters
@ -45,6 +53,8 @@ private:
protected:
fgViewType _type;
// the current view offset angle from forward (rotated about the
// view_up vector)
double view_offset;
@ -151,6 +161,8 @@ public:
//////////////////////////////////////////////////////////////////////
// accessor functions
//////////////////////////////////////////////////////////////////////
inline int get_type() const { return _type ; }
inline int is_a( int t ) const { return get_type() == t ; }
inline bool is_dirty() const { return dirty; }
inline double get_view_offset() const { return view_offset; }
inline double get_goal_view_offset() const { return goal_view_offset; }

91
src/Main/viewer_lookat.cxx
View file

@ -48,62 +48,41 @@ FGViewerLookAt::FGViewerLookAt( void )
}
static void fgLookAt( sgVec3 eye, sgVec3 center, sgVec3 up, sgMat4 &m ) {
double x[3], y[3], z[3];
double mag;
void fgMakeLookAtMat4 ( sgMat4 dst, const sgVec3 eye, const sgVec3 center,
const sgVec3 up )
{
// Caveats:
// 1) In order to compute the line of sight, the eye point must not be equal
// to the center point.
// 2) The up vector must not be parallel to the line of sight from the eye
// to the center point.
/* Make rotation matrix */
/* Compute the direction vectors */
sgVec3 x,y,z;
/* Z vector */
z[0] = eye[0] - center[0];
z[1] = eye[1] - center[1];
z[2] = eye[2] - center[2];
mag = sqrt( z[0]*z[0] + z[1]*z[1] + z[2]*z[2] );
if (mag) { /* mpichler, 19950515 */
z[0] /= mag;
z[1] /= mag;
z[2] /= mag;
}
/* Y vector = center - eye */
sgSubVec3 ( y, center, eye ) ;
/* Y vector */
y[0] = up[0];
y[1] = up[1];
y[2] = up[2];
/* Z vector = up */
sgCopyVec3 ( z, up ) ;
/* X vector = Y cross Z */
x[0] = y[1]*z[2] - y[2]*z[1];
x[1] = -y[0]*z[2] + y[2]*z[0];
x[2] = y[0]*z[1] - y[1]*z[0];
/* X vector = Y cross Z */
sgVectorProductVec3 ( x, y, z ) ;
/* Recompute Y = Z cross X */
y[0] = z[1]*x[2] - z[2]*x[1];
y[1] = -z[0]*x[2] + z[2]*x[0];
y[2] = z[0]*x[1] - z[1]*x[0];
/* Recompute Z = X cross Y */
sgVectorProductVec3 ( z, x, y ) ;
/* mpichler, 19950515 */
/* cross product gives area of parallelogram, which is < 1.0 for
* non-perpendicular unit-length vectors; so normalize x, y here
*/
/* Normalize everything */
sgNormaliseVec3 ( x ) ;
sgNormaliseVec3 ( y ) ;
sgNormaliseVec3 ( z ) ;
mag = sqrt( x[0]*x[0] + x[1]*x[1] + x[2]*x[2] );
if (mag) {
x[0] /= mag;
x[1] /= mag;
x[2] /= mag;
}
mag = sqrt( y[0]*y[0] + y[1]*y[1] + y[2]*y[2] );
if (mag) {
y[0] /= mag;
y[1] /= mag;
y[2] /= mag;
}
#define M(row,col) m[row][col]
M(0,0) = x[0]; M(0,1) = x[1]; M(0,2) = x[2]; M(0,3) = 0.0;
M(1,0) = y[0]; M(1,1) = y[1]; M(1,2) = y[2]; M(1,3) = 0.0;
M(2,0) = z[0]; M(2,1) = z[1]; M(2,2) = z[2]; M(2,3) = 0.0;
M(3,0) = -eye[0]; M(3,1) = -eye[1]; M(3,2) = -eye[2]; M(3,3) = 1.0;
/* Build the matrix */
#define M(row,col) dst[row][col]
M(0,0) = x[0]; M(0,1) = x[1]; M(0,2) = x[2]; M(0,3) = 0.0;
M(1,0) = y[0]; M(1,1) = y[1]; M(1,2) = y[2]; M(1,3) = 0.0;
M(2,0) = z[0]; M(2,1) = z[1]; M(2,2) = z[2]; M(2,3) = 0.0;
M(3,0) = eye[0]; M(3,1) = eye[1]; M(3,2) = eye[2]; M(3,3) = 1.0;
#undef M
}
@ -152,24 +131,28 @@ void FGViewerLookAt::update() {
sgdVec3 vp;
sgdSubVec3( vp, abs_view_pos, sc );
sgSetVec3( view_pos, vp );
sgAddVec3( view_pos, pilot_offset );
FG_LOG( FG_VIEW, FG_DEBUG, "sea level radius = " << sea_level_radius );
FG_LOG( FG_VIEW, FG_DEBUG, "Polar view pos = " << p );
FG_LOG( FG_VIEW, FG_DEBUG, "Absolute view pos = "
FG_LOG( FG_VIEW, FG_INFO, "Absolute view pos = "
<< abs_view_pos[0] << ","
<< abs_view_pos[1] << ","
<< abs_view_pos[2] );
FG_LOG( FG_VIEW, FG_DEBUG, "Relative view pos = "
FG_LOG( FG_VIEW, FG_INFO, "Relative view pos = "
<< view_pos[0] << "," << view_pos[1] << "," << view_pos[2] );
FG_LOG( FG_VIEW, FG_DEBUG, "view forward = "
FG_LOG( FG_VIEW, FG_INFO, "pilot offset = "
<< pilot_offset[0] << "," << pilot_offset[1] << ","
<< pilot_offset[2] );
FG_LOG( FG_VIEW, FG_INFO, "view forward = "
<< view_forward[0] << "," << view_forward[1] << ","
<< view_forward[2] );
FG_LOG( FG_VIEW, FG_DEBUG, "view up = "
FG_LOG( FG_VIEW, FG_INFO, "view up = "
<< view_up[0] << "," << view_up[1] << ","
<< view_up[2] );
// Make the VIEW matrix.
fgLookAt( view_pos, view_forward, view_up, VIEW );
fgMakeLookAtMat4( VIEW, view_pos, view_forward, view_up );
// cout << "VIEW matrix" << endl;
// print_sgMat4( VIEW );