Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
This commit is contained in:
curt
parent
3c398c79ca
commit
45ed7c79f8
7 changed files with 174 additions and 49 deletions
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@ -124,8 +124,7 @@ static void fgUpdateViewParams() {
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/* base sky color */
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GLfloat base_sky_color[4] = {0.60, 0.60, 0.90, 1.0};
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/* base fog color */
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/* GLfloat base_fog_color[4] = {0.70, 0.70, 0.70, 1.0}; */
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GLfloat base_fog_color[4] = {1.00, 0.00, 0.00, 1.0};
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GLfloat base_fog_color[4] = {0.70, 0.70, 0.70, 1.0};
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GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
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@ -134,7 +133,7 @@ static void fgUpdateViewParams() {
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t = &cur_time_params;
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v = ¤t_view;
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fgViewUpdate(f, v);
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fgViewUpdate(f, v, l);
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/* Tell GL we are about to modify the projection parameters */
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xglMatrixMode(GL_PROJECTION);
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@ -144,13 +143,27 @@ static void fgUpdateViewParams() {
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xglMatrixMode(GL_MODELVIEW);
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xglLoadIdentity();
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/* set up our view volume */
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/* set up our view volume (default) */
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gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
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v->view_pos.x + v->view_forward[0],
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v->view_pos.y + v->view_forward[1],
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v->view_pos.z + v->view_forward[2],
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v->view_up[0], v->view_up[1], v->view_up[2]);
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/* lock view horizontally towards sun (testing) */
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/* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
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v->view_pos.x + v->surface_to_sun[0],
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v->view_pos.y + v->surface_to_sun[1],
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v->view_pos.z + v->surface_to_sun[2],
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v->view_up[0], v->view_up[1], v->view_up[2]); */
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/* lock view horizontally towards south (testing) */
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/* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
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v->view_pos.x + v->surface_south[0],
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v->view_pos.y + v->surface_south[1],
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v->view_pos.z + v->surface_south[2],
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v->view_up[0], v->view_up[1], v->view_up[2]); */
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/* set the sun position */
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xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
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@ -203,7 +216,7 @@ static void fgUpdateViewParams() {
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* Update all Visuals (redraws anything graphics related)
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**************************************************************************/
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static void fgUpdateVisuals( void ) {
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static void fgRenderFrame( void ) {
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struct fgLIGHT *l;
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struct fgTIME *t;
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struct fgVIEW *v;
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@ -502,7 +515,7 @@ static void fgMainLoop( void ) {
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fgAircraftOutputCurrent(a);
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/* redraw display */
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fgUpdateVisuals();
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fgRenderFrame();
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}
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@ -589,7 +602,7 @@ int main( int argc, char *argv[] ) {
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xglutIdleFunc( fgMainLoop );
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/* draw the scene */
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xglutDisplayFunc( fgUpdateVisuals );
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xglutDisplayFunc( fgRenderFrame );
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/* pass control off to the GLUT event handler */
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glutMainLoop();
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@ -607,9 +620,12 @@ int main( int argc, char *argv[] ) {
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/* $Log$
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/* Revision 1.37 1997/12/19 23:34:03 curt
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/* Lot's of tweaking with sky rendering and lighting.
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/* Revision 1.38 1997/12/22 04:14:28 curt
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/* Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
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/*
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* Revision 1.37 1997/12/19 23:34:03 curt
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* Lot's of tweaking with sky rendering and lighting.
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*
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* Revision 1.36 1997/12/19 16:44:57 curt
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* Working on scene rendering order and options.
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*
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42
Main/depend
42
Main/depend
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@ -1,44 +1,46 @@
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GLUTkey.o: GLUTkey.c ../XGL/xgl.h GLUTkey.h views.h ../Include/types.h \
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../Flight/flight.h ../Flight/Slew/slew.h \
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../Flight/LaRCsim/ls_interface.h ../Flight/LaRCsim/../flight.h \
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../Math/mat3.h ../Include/constants.h ../Aircraft/aircraft.h \
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../Aircraft/../Flight/flight.h ../Aircraft/../Controls/controls.h \
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../Math/mat3.h ../Time/fg_time.h ../Time/../Include/types.h \
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../Time/../Flight/flight.h ../Include/constants.h \
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../Aircraft/aircraft.h ../Aircraft/../Flight/flight.h \
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../Aircraft/../Controls/controls.h \
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../Aircraft/../Controls/../Include/limits.h ../Weather/weather.h
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GLUTmain.o: GLUTmain.c ../XGL/xgl.h GLUTkey.h fg_init.h views.h \
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../Include/types.h ../Flight/flight.h ../Flight/Slew/slew.h \
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../Flight/LaRCsim/ls_interface.h ../Flight/LaRCsim/../flight.h \
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../Math/mat3.h ../Include/constants.h ../Include/general.h \
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../Aircraft/aircraft.h ../Aircraft/../Flight/flight.h \
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../Aircraft/../Controls/controls.h \
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../Math/mat3.h ../Time/fg_time.h ../Time/../Include/types.h \
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../Time/../Flight/flight.h ../Include/constants.h \
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../Include/general.h ../Aircraft/aircraft.h \
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../Aircraft/../Flight/flight.h ../Aircraft/../Controls/controls.h \
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../Aircraft/../Controls/../Include/limits.h ../Cockpit/cockpit.h \
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../Cockpit/hud.h ../Cockpit/../Aircraft/aircraft.h \
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../Cockpit/../Flight/flight.h ../Cockpit/../Controls/controls.h \
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../Joystick/joystick.h ../Math/fg_geodesy.h ../Math/polar.h \
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../Math/../Include/types.h ../Scenery/mesh.h ../Scenery/moon.h \
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../Scenery/orbits.h ../Scenery/../Time/fg_time.h \
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../Scenery/../Time/../Include/types.h \
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../Scenery/../Time/../Flight/flight.h ../Scenery/scenery.h \
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../Scenery/orbits.h ../Scenery/../Time/fg_time.h ../Scenery/scenery.h \
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../Scenery/../Include/types.h ../Scenery/sky.h ../Scenery/stars.h \
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../Scenery/sun.h ../Time/fg_time.h ../Time/fg_timer.h \
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../Time/sunpos.h ../Time/../Include/types.h ../Weather/weather.h
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../Scenery/sun.h ../Time/fg_timer.h ../Time/sunpos.h \
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../Weather/weather.h
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fg_init.o: fg_init.c fg_init.h views.h ../Include/types.h \
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../Flight/flight.h ../Flight/Slew/slew.h \
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../Flight/LaRCsim/ls_interface.h ../Flight/LaRCsim/../flight.h \
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../Math/mat3.h ../Include/constants.h ../Include/general.h \
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../Aircraft/aircraft.h ../Aircraft/../Flight/flight.h \
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../Aircraft/../Controls/controls.h \
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../Math/mat3.h ../Time/fg_time.h ../Time/../Include/types.h \
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../Time/../Flight/flight.h ../Include/constants.h \
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../Include/general.h ../Aircraft/aircraft.h \
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../Aircraft/../Flight/flight.h ../Aircraft/../Controls/controls.h \
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../Aircraft/../Controls/../Include/limits.h ../Cockpit/cockpit.h \
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../Cockpit/hud.h ../Cockpit/../Aircraft/aircraft.h \
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../Cockpit/../Flight/flight.h ../Cockpit/../Controls/controls.h \
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../Joystick/joystick.h ../Math/fg_random.h ../Scenery/mesh.h \
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../Scenery/moon.h ../Scenery/orbits.h ../Scenery/../Time/fg_time.h \
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../Scenery/../Time/../Include/types.h \
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../Scenery/../Time/../Flight/flight.h ../Scenery/scenery.h \
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../Scenery/../Include/types.h ../Scenery/sky.h ../Scenery/stars.h \
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../Scenery/sun.h ../Time/fg_time.h ../Time/sunpos.h \
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../Time/../Include/types.h ../Weather/weather.h
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../Scenery/scenery.h ../Scenery/../Include/types.h ../Scenery/sky.h \
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../Scenery/stars.h ../Scenery/sun.h ../Time/sunpos.h \
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../Weather/weather.h
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views.o: views.c views.h ../Include/types.h ../Flight/flight.h \
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../Flight/Slew/slew.h ../Flight/LaRCsim/ls_interface.h \
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../Flight/LaRCsim/../flight.h ../Math/mat3.h ../Include/constants.h \
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../Math/polar.h ../Math/../Include/types.h ../Scenery/scenery.h \
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../Flight/LaRCsim/../flight.h ../Math/mat3.h ../Time/fg_time.h \
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../Time/../Include/types.h ../Time/../Flight/flight.h \
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../Include/constants.h ../Math/polar.h ../Math/../Include/types.h \
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../Math/vector.h ../Math/../Math/mat3.h ../Scenery/scenery.h \
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../Scenery/../Include/types.h
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52
Main/views.c
52
Main/views.c
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@ -31,7 +31,9 @@
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#include "../Flight/flight.h"
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#include "../Math/mat3.h"
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#include "../Math/polar.h"
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#include "../Math/vector.h"
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#include "../Scenery/scenery.h"
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#include "../Time/fg_time.h"
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/* This is a record containing current view parameters */
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@ -46,9 +48,10 @@ void fgViewInit(struct fgVIEW *v) {
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/* Update the view parameters */
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void fgViewUpdate(struct fgFLIGHT *f, struct fgVIEW *v) {
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MAT3vec vec, forward;
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void fgViewUpdate(struct fgFLIGHT *f, struct fgVIEW *v, struct fgLIGHT *l) {
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MAT3vec vec, forward, v0, minus_z;
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MAT3mat R, TMP, UP, LOCAL, VIEW;
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double ntmp;
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/* calculate the cartesion coords of the current lat/lon/0 elev */
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v->cur_zero_elev = fgPolarToCart(FG_Longitude, FG_Lat_geocentric,
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@ -67,6 +70,16 @@ void fgViewUpdate(struct fgFLIGHT *f, struct fgVIEW *v) {
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printf("View pos = %.4f, %.4f, %.4f\n",
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v->view_pos.x, v->view_pos.y, v->view_pos.z);
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/* make a vector to the current view position */
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MAT3_SET_VEC(v0, v->view_pos.x, v->view_pos.y, v->view_pos.z);
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/* calculate vector to sun's position on the earth's surface */
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v->to_sun[0] = l->fg_sunpos.x - (v->view_pos.x + scenery.center.x);
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v->to_sun[1] = l->fg_sunpos.y - (v->view_pos.y + scenery.center.y);
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v->to_sun[2] = l->fg_sunpos.z - (v->view_pos.z + scenery.center.z);
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printf("Vector to sun = %.2f %.2f %.2f\n",
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v->to_sun[0], v->to_sun[1], v->to_sun[2]);
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/* Derive the LOCAL aircraft rotation matrix (roll, pitch, yaw) */
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MAT3_SET_VEC(vec, 0.0, 0.0, 1.0);
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MAT3rotate(R, vec, FG_Phi);
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@ -136,13 +149,44 @@ void fgViewUpdate(struct fgFLIGHT *f, struct fgVIEW *v) {
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MAT3rotate(TMP, v->view_up, v->view_offset);
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MAT3mult_vec(v->view_forward, forward, TMP);
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/* Given a vector from the view position to the point on the
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* earth's surface the sun is directly over, map into onto the
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* local plane representing "horizontal". */
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map_vec_onto_cur_surface_plane(v->local_up, v0, v->to_sun,
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v->surface_to_sun);
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MAT3_NORMALIZE_VEC(v->surface_to_sun, ntmp);
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printf("Surface direction to sun is %.2f %.2f %.2f\n",
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v->surface_to_sun[0], v->surface_to_sun[1], v->surface_to_sun[2]);
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/* printf("Should be close to zero = %.2f\n",
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MAT3_DOT_PRODUCT(v->local_up, v->surface_to_sun)); */
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/* Given a vector pointing straight down (-Z), map into onto the
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* local plane representing "horizontal". This should give us the
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* local direction for moving "south". */
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MAT3_SET_VEC(minus_z, 0.0, 0.0, -1.0);
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map_vec_onto_cur_surface_plane(v->local_up, v0, minus_z, v->surface_south);
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MAT3_NORMALIZE_VEC(v->surface_south, ntmp);
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/* printf("Surface direction directly south %.2f %.2f %.2f\n",
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v->surface_south[0], v->surface_south[1], v->surface_south[2]); */
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/* now calculate the surface east vector */
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MAT3rotate(TMP, v->view_up, FG_PI_2);
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MAT3mult_vec(v->surface_east, v->surface_south, TMP);
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/* printf("Surface direction directly east %.2f %.2f %.2f\n",
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v->surface_east[0], v->surface_east[1], v->surface_east[2]); */
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/* printf("Should be close to zero = %.2f\n",
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MAT3_DOT_PRODUCT(v->surface_south, v->surface_east)); */
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}
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/* $Log$
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/* Revision 1.5 1997/12/18 04:07:02 curt
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/* Worked on properly translating and positioning the sky dome.
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/* Revision 1.6 1997/12/22 04:14:32 curt
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/* Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
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/*
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* Revision 1.5 1997/12/18 04:07:02 curt
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* Worked on properly translating and positioning the sky dome.
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*
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* Revision 1.4 1997/12/17 23:13:36 curt
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* Began working on rendering a sky.
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*
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46
Main/views.h
46
Main/views.h
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@ -31,14 +31,47 @@
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#include "../Include/types.h"
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#include "../Flight/flight.h"
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#include "../Math/mat3.h"
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#include "../Time/fg_time.h"
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/* Define a structure containing view information */
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struct fgVIEW {
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/* view position translated to scenery.center */
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struct fgCartesianPoint view_pos;
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/* cartesion coordinates of current lon/lat if at sea level
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* translated to scenery.center*/
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struct fgCartesianPoint cur_zero_elev;
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MAT3vec local_up, view_up, view_forward;
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double view_offset, goal_view_offset;
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/* vector in cartesian coordinates from current position to the
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* postion on the earth's surface the sun is directly over */
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MAT3vec to_sun;
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/* surface direction to go to head towards sun */
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MAT3vec surface_to_sun;
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/* surface vector heading south */
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MAT3vec surface_south;
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/* surface vector heading east (used to unambiguously align sky with sun) */
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MAT3vec surface_east;
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/* local up vector (normal to the plane tangent to the earth's
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* surface at the spot we are directly above */
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MAT3vec local_up;
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/* up vector for the view (usually point straight up through the
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* top of the aircraft */
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MAT3vec view_up;
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/* the vector pointing straight out the nose of the aircraft */
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MAT3vec view_forward;
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/* the current offset from forward for viewing */
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double view_offset;
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/* the goal view offset for viewing (used for smooth view changes) */
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double goal_view_offset;
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};
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@ -49,16 +82,19 @@ extern struct fgVIEW current_view;
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void fgViewInit(struct fgVIEW *v);
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/* Update the view parameters */
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void fgViewUpdate(struct fgFLIGHT *f, struct fgVIEW *v);
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void fgViewUpdate(struct fgFLIGHT *f, struct fgVIEW *v, struct fgLIGHT *l);
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#endif /* VIEWS_H */
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/* $Log$
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/* Revision 1.4 1997/12/17 23:13:36 curt
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/* Began working on rendering a sky.
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/* Revision 1.5 1997/12/22 04:14:32 curt
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/* Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
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/*
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* Revision 1.4 1997/12/17 23:13:36 curt
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* Began working on rendering a sky.
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*
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* Revision 1.3 1997/12/15 23:54:51 curt
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* Add xgl wrappers for debugging.
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* Generate terrain normals on the fly.
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@ -5,8 +5,9 @@ astro.o: astro.c ../XGL/xgl.h astro.h stars.h moon.h orbits.h \
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../Time/../Flight/LaRCsim/../flight.h planets.h sun.h \
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../Include/constants.h ../Include/general.h ../Main/views.h \
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../Main/../Include/types.h ../Main/../Flight/flight.h \
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../Main/../Math/mat3.h ../Aircraft/aircraft.h \
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../Aircraft/../Flight/flight.h ../Aircraft/../Controls/controls.h \
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../Main/../Math/mat3.h ../Main/../Time/fg_time.h \
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../Aircraft/aircraft.h ../Aircraft/../Flight/flight.h \
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../Aircraft/../Controls/controls.h \
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../Aircraft/../Controls/../Include/limits.h
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common.o: common.c common.h
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geometry.o: geometry.c geometry.h mesh.h
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@ -19,7 +20,7 @@ moon.o: moon.c ../XGL/xgl.h orbits.h ../Time/fg_time.h \
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../Time/../Flight/LaRCsim/ls_interface.h \
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../Time/../Flight/LaRCsim/../flight.h moon.h ../Include/general.h \
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../Main/views.h ../Main/../Include/types.h ../Main/../Flight/flight.h \
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../Main/../Math/mat3.h
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../Main/../Math/mat3.h ../Main/../Time/fg_time.h
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obj.o: obj.c ../XGL/xgl.h obj.h scenery.h ../Include/types.h \
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../Math/mat3.h
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orbits.o: orbits.c orbits.h ../Time/fg_time.h \
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@ -41,7 +42,8 @@ sky.o: sky.c ../XGL/xgl.h sky.h ../Time/fg_time.h \
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../Aircraft/../Flight/flight.h ../Aircraft/../Controls/controls.h \
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../Aircraft/../Controls/../Include/limits.h ../Flight/flight.h \
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../Include/constants.h ../Main/views.h ../Main/../Include/types.h \
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../Main/../Flight/flight.h ../Main/../Math/mat3.h ../Math/fg_random.h
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../Main/../Flight/flight.h ../Main/../Math/mat3.h \
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../Main/../Time/fg_time.h ../Math/fg_random.h
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stars.o: stars.c ../XGL/xgl.h orbits.h ../Time/fg_time.h \
|
||||
../Time/../Include/types.h ../Time/../Flight/flight.h \
|
||||
../Time/../Flight/Slew/slew.h \
|
||||
|
|
@ -51,10 +53,10 @@ stars.o: stars.c ../XGL/xgl.h orbits.h ../Time/fg_time.h \
|
|||
../Aircraft/../Flight/flight.h ../Aircraft/../Controls/controls.h \
|
||||
../Aircraft/../Controls/../Include/limits.h ../Main/views.h \
|
||||
../Main/../Include/types.h ../Main/../Flight/flight.h \
|
||||
../Main/../Math/mat3.h
|
||||
../Main/../Math/mat3.h ../Main/../Time/fg_time.h
|
||||
sun.o: sun.c ../XGL/xgl.h ../Time/fg_time.h ../Time/../Include/types.h \
|
||||
../Time/../Flight/flight.h ../Time/../Flight/Slew/slew.h \
|
||||
../Time/../Flight/LaRCsim/ls_interface.h \
|
||||
../Time/../Flight/LaRCsim/../flight.h ../Main/views.h \
|
||||
../Main/../Include/types.h ../Main/../Flight/flight.h \
|
||||
../Main/../Math/mat3.h orbits.h sun.h
|
||||
../Main/../Math/mat3.h ../Main/../Time/fg_time.h orbits.h sun.h
|
||||
|
|
|
|||
|
|
@ -99,7 +99,7 @@ void fgSkyRender() {
|
|||
struct fgFLIGHT *f;
|
||||
struct fgLIGHT *l;
|
||||
struct fgVIEW *v;
|
||||
float inner_color[4], middle_color[4], diff;
|
||||
float inner_color[4], middle_color[4], diff, east_dot, dot, angle;
|
||||
int i;
|
||||
|
||||
f = ¤t_aircraft.flight;
|
||||
|
|
@ -125,6 +125,25 @@ void fgSkyRender() {
|
|||
|
||||
xglPushMatrix();
|
||||
|
||||
/* calculate the angle between v->surface_to_sun and
|
||||
* v->surface_east. We do this so we can sort out the acos()
|
||||
* ambiguity. I wish I could think of a more efficient way ... :-( */
|
||||
east_dot = MAT3_DOT_PRODUCT(v->surface_to_sun, v->surface_east);
|
||||
printf(" East dot product = %.2f\n", east_dot);
|
||||
|
||||
/* calculate the angle between v->surface_to_sun and
|
||||
* v->surface_south. this is how much we have to rotate the sky
|
||||
* for it to align with the sun */
|
||||
dot = MAT3_DOT_PRODUCT(v->surface_to_sun, v->surface_south);
|
||||
printf(" Dot product = %.2f\n", dot);
|
||||
if ( east_dot >= 0 ) {
|
||||
angle = acos(dot);
|
||||
} else {
|
||||
angle = -acos(dot);
|
||||
}
|
||||
printf(" Sky needs to rotate = %.3f rads = %.1f degrees.\n",
|
||||
angle, angle * RAD_TO_DEG);
|
||||
|
||||
/* Translate to view position */
|
||||
xglTranslatef( v->cur_zero_elev.x, v->cur_zero_elev.y, v->cur_zero_elev.z );
|
||||
/* printf(" Translated to %.2f %.2f %.2f\n",
|
||||
|
|
@ -135,6 +154,7 @@ void fgSkyRender() {
|
|||
FG_Latitude * RAD_TO_DEG);
|
||||
xglRotatef( FG_Longitude * RAD_TO_DEG, 0.0, 0.0, 1.0 );
|
||||
xglRotatef( 90.0 - FG_Latitude * RAD_TO_DEG, 0.0, 1.0, 0.0 );
|
||||
xglRotatef( angle * RAD_TO_DEG, 0.0, 0.0, 1.0 );
|
||||
|
||||
/* Draw inner/center section of sky*/
|
||||
xglBegin( GL_TRIANGLE_FAN );
|
||||
|
|
@ -156,8 +176,10 @@ void fgSkyRender() {
|
|||
xglVertex3fv( sky_inner[i] );
|
||||
}
|
||||
xglColor4fv( middle_color );
|
||||
xglColor4f(1.0, 0.0, 0.0, 1.0);
|
||||
xglVertex3fv( sky_middle[0] );
|
||||
xglColor4fv( inner_color );
|
||||
xglColor4f(1.0, 0.0, 0.0, 1.0);
|
||||
xglVertex3fv( sky_inner[0] );
|
||||
xglEnd();
|
||||
|
||||
|
|
@ -180,9 +202,12 @@ void fgSkyRender() {
|
|||
|
||||
|
||||
/* $Log$
|
||||
/* Revision 1.5 1997/12/19 23:34:59 curt
|
||||
/* Lot's of tweaking with sky rendering and lighting.
|
||||
/* Revision 1.6 1997/12/22 04:14:34 curt
|
||||
/* Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
|
||||
/*
|
||||
* Revision 1.5 1997/12/19 23:34:59 curt
|
||||
* Lot's of tweaking with sky rendering and lighting.
|
||||
*
|
||||
* Revision 1.4 1997/12/19 16:45:02 curt
|
||||
* Working on scene rendering order and options.
|
||||
*
|
||||
|
|
|
|||
|
|
@ -9,6 +9,6 @@ sunpos.o: sunpos.c sunpos.h ../Include/types.h fg_time.h \
|
|||
../Flight/LaRCsim/ls_interface.h ../Flight/LaRCsim/../flight.h \
|
||||
../Include/constants.h ../Main/views.h ../Main/../Include/types.h \
|
||||
../Main/../Flight/flight.h ../Main/../Math/mat3.h \
|
||||
../Math/fg_geodesy.h ../Math/mat3.h ../Math/polar.h \
|
||||
../Math/../Include/types.h
|
||||
../Main/../Time/fg_time.h ../Math/fg_geodesy.h ../Math/mat3.h \
|
||||
../Math/polar.h ../Math/../Include/types.h
|
||||
ttest.o: ttest.c
|
||||
|
|
|
|||
Loading…
Reference in a new issue