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Make sky dome scaling values sensible (i.e. the sky dome will now fill up

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the dimensions provided.)  We draw the sky dome before everything else
  and draw it with depth buffer off so it really doesn't matter, but it just
  makes a little more sense this way.
Updated a few doxygen comments.
This commit is contained in:
curt 2003-06-09 20:19:52 +00:00
parent e053941467
commit f8201e6478
3 changed files with 62 additions and 52 deletions
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34
simgear/scene/sky/dome.cxx
View File

@ -47,20 +47,20 @@
#endif
// in meters of course
static const float center_elev = 0.3125;
// proportions of max dimensions fed to the build() routine
static const float center_elev = 1.0;
static const float upper_radius = 0.6250;
static const float upper_elev = 0.2500;
static const float upper_radius = 0.6;
static const float upper_elev = 0.15;
static const float middle_radius = 0.8750;
static const float middle_elev = 0.1000;
static const float middle_radius = 0.9;
static const float middle_elev = 0.08;
static const float lower_radius = 0.8750;
static const float lower_elev = 0.0000;
static const float lower_radius = 1.0;
static const float lower_elev = 0.0;
static const float bottom_radius = 0.6250;
static const float bottom_elev = -0.0250;
static const float bottom_radius = 0.8;
static const float bottom_elev = -0.1;
// Set up dome rendering callbacks
@ -105,7 +105,7 @@ SGSkyDome::~SGSkyDome( void ) {
ssgBranch * SGSkyDome::build( double hscale, double vscale ) {
sgVec4 color;
float theta;
double theta;
int i;
// set up the state
@ -155,18 +155,18 @@ ssgBranch * SGSkyDome::build( double hscale, double vscale ) {
upper_elev * vscale );
sgSetVec3( middle_vertex[i],
cos((double)theta) * middle_radius * hscale,
sin((double)theta) * middle_radius * hscale,
cos(theta) * middle_radius * hscale,
sin(theta) * middle_radius * hscale,
middle_elev * vscale );
sgSetVec3( lower_vertex[i],
cos((double)theta) * lower_radius * hscale,
sin((double)theta) * lower_radius * hscale,
cos(theta) * lower_radius * hscale,
sin(theta) * lower_radius * hscale,
lower_elev * vscale );
sgSetVec3( bottom_vertex[i],
cos((double)theta) * bottom_radius * hscale,
sin((double)theta) * bottom_radius * hscale,
cos(theta) * bottom_radius * hscale,
sin(theta) * bottom_radius * hscale,
bottom_elev * vscale );
}

52
simgear/timing/sg_time.cxx
View File

@ -71,7 +71,7 @@ static const double J2000 = 2451545.0 - MJD0;
static const double SIDRATE = 0.9972695677;
void SGTime::init( double lon, double lat,
void SGTime::init( double lon_rad, double lat_rad,
const string& root, time_t init_time )
{
SG_LOG( SG_EVENT, SG_INFO, "Initializing Time" );
@ -96,7 +96,7 @@ void SGTime::init( double lon, double lat,
<< zone.str() );
tzContainer = new SGTimeZoneContainer( zone.c_str() );
SGGeoCoord location( SGD_RADIANS_TO_DEGREES * lat, SGD_RADIANS_TO_DEGREES * lon );
SGGeoCoord location( SGD_RADIANS_TO_DEGREES * lat_rad, SGD_RADIANS_TO_DEGREES * lon_rad );
SGGeoCoord* nearestTz = tzContainer->getNearest(location);
SGPath name( root );
@ -110,9 +110,10 @@ void SGTime::init( double lon, double lat,
}
}
SGTime::SGTime( double lon, double lat, const string& root, time_t init_time )
SGTime::SGTime( double lon_rad, double lat_rad, const string& root,
time_t init_time )
{
init( lon, lat, root, init_time );
init( lon_rad, lat_rad, root, init_time );
}
@ -196,7 +197,9 @@ static double sidereal_course( time_t cur_time, const struct tm *gmt, double lng
// Update the time related variables
void SGTime::update( double lon, double lat, time_t ct, long int warp ) {
void SGTime::update( double lon_rad, double lat_rad,
time_t ct, long int warp )
{
double gst_precise, gst_course;
#if defined(_MSC_VER) || defined(__MINGW32__)
@ -251,46 +254,51 @@ void SGTime::update( double lon, double lat, time_t ct, long int warp ) {
gst_diff = gst_precise - gst_course;
lst = sidereal_course( cur_time, gmt, -(lon * SGD_RADIANS_TO_DEGREES) ) + gst_diff;
lst = sidereal_course( cur_time, gmt,
-(lon_rad * SGD_RADIANS_TO_DEGREES) ) + gst_diff;
} else {
// course + difference should drift off very slowly
gst = sidereal_course( cur_time, gmt, 0.00 ) + gst_diff;
lst = sidereal_course( cur_time, gmt, -(lon * SGD_RADIANS_TO_DEGREES) ) + gst_diff;
lst = sidereal_course( cur_time, gmt,
-(lon_rad * SGD_RADIANS_TO_DEGREES) ) + gst_diff;
}
SG_LOG( SG_EVENT, SG_DEBUG,
" Current lon=0.00 Sidereal Time = " << gst );
SG_LOG( SG_EVENT, SG_DEBUG,
" Current LOCAL Sidereal Time = " << lst << " ("
<< sidereal_precise( mjd, -(lon * SGD_RADIANS_TO_DEGREES) )
<< sidereal_precise( mjd, -(lon_rad * SGD_RADIANS_TO_DEGREES) )
<< ") (diff = " << gst_diff << ")" );
}
// Given lon/lat, update timezone information and local_offset
void SGTime::updateLocal( double lon, double lat, const string& root ) {
void SGTime::updateLocal( double lon_rad, double lat_rad, const string& root ) {
// sanity checking
if ( lon < -SGD_PI || lon > SGD_PI ) {
if ( lon_rad < -SGD_PI || lon_rad> SGD_PI ) {
// not within -180 ... 180
lon = 0.0;
lon_rad = 0.0;
}
if ( lat < -SGD_PI * 0.5 || lat > SGD_PI * 0.5 ) {
if ( lat_rad < -SGD_PI * 0.5 || lat_rad > SGD_PI * 0.5 ) {
// not within -90 ... 90
lat = 0.0;
lat_rad = 0.0;
}
if ( lon != lon ) {
// only true if lon == nan
SG_LOG( SG_EVENT, SG_ALERT, " Detected lon == nan, resetting to 0.0" );
lon = 0.0;
if ( lon_rad != lon_rad ) {
// only true if lon_rad == nan
SG_LOG( SG_EVENT, SG_ALERT,
" Detected lon_rad == nan, resetting to 0.0" );
lon_rad = 0.0;
}
if ( lat != lat ) {
// only true if lat == nan
SG_LOG( SG_EVENT, SG_ALERT, " Detected lat == nan, resetting to 0.0" );
lat = 0.0;
if ( lat_rad != lat_rad ) {
// only true if lat_rad == nan
SG_LOG( SG_EVENT, SG_ALERT,
" Detected lat_rad == nan, resetting to 0.0" );
lat_rad = 0.0;
}
time_t currGMT;
time_t aircraftLocalTime;
SGGeoCoord location( SGD_RADIANS_TO_DEGREES * lat, SGD_RADIANS_TO_DEGREES * lon );
SGGeoCoord location( SGD_RADIANS_TO_DEGREES * lat_rad,
SGD_RADIANS_TO_DEGREES * lon_rad );
SGGeoCoord* nearestTz = tzContainer->getNearest(location);
SGPath zone( root );
zone.append ( nearestTz->getDescription() );

26
simgear/timing/sg_time.hxx
View File

@ -104,6 +104,10 @@ private:
// gst_diff has pretty good accuracy over the span of a couple hours
double gst_diff;
/** init common constructor code */
void init( double lon_rad, double lat_rad, const string& root,
time_t init_time );
public:
/** Default constructor */
@ -120,12 +124,13 @@ public:
* If you don't know your position when you call the SGTime
* constructor, you can just use the first form (which assumes 0,
* 0).
* @param lon current longitude
* @param lat current latitude
* @param lon_rad current longitude (radians)
* @param lat_rad current latitude (radians)
* @param root root path point to data file location (timezone, etc.)
* @param init_time provide an initialization time, 0 means use
current clock time */
SGTime( double lon, double lat, const string& root, time_t init_time /* = 0 */ );
SGTime( double lon_rad, double lat_rad, const string& root,
time_t init_time );
/**
* Create an instance given a data file path.
@ -136,9 +141,6 @@ public:
/** Destructor */
~SGTime();
/** init common constructor code */
void init( double lon, double lat, const string& root, time_t init_time /* = 0 */ );
/**
* Update the time related variables.
* The update() method requires you to pass in your position and
@ -146,13 +148,13 @@ public:
* you to offset "sim" time relative to "real" time. The update()
* method is designed to be called by the host application before
* every frame.
* @param lon current longitude
* @param lat current latitude
* @param lon_rad current longitude (radians)
* @param lat_rad current latitude (radians)
* @param ct specify a unix time, otherwise specify 0 to use current
clock time
* @param warp an optional time offset specified in seconds. This
* allows us to advance or rewind "time" if we choose to. */
void update( double lon, double lat, time_t ct /* = 0 */, long int warp /* = 0 */ );
void update( double lon_rad, double lat_rad, time_t ct, long int warp );
/**
* Given lon/lat, update timezone information and local_offset
@ -161,10 +163,10 @@ public:
* enough that your timezone may have changed as well. In the
* FlightGear project we call updateLocal() every few minutes from
* our periodic event manager.
* @param lon current longitude
* @param lat current latitude
* @param lon_rad current longitude (radians)
* @param lat_rad current latitude (radians)
* @param root base path containing time zone directory */
void updateLocal( double lon, double lat, const string& root );
void updateLocal( double lon_rad, double lat_rad, const string& root );
/** @return current system/unix time in seconds */
inline time_t get_cur_time() const { return cur_time; };