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Improved goto distance for reference points. When the user goes to the reference point, the default view distance will be large enough so that all objects with orbits centered on the point will fit in the view.

ver1_6_1
Chris Laurel 2008-03-19 05:08:33 +00:00
parent 1f571f5749
commit dcc1d75b99
1 changed files with 21 additions and 1 deletions
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22
src/celengine/observer.cpp
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@ -11,6 +11,7 @@
#include <celmath/solve.h>
#include "observer.h"
#include "simulation.h"
#include "frametree.h"
static const double maximumSimTime = 730486721060.00073; // 2000000000 Jan 01 12:00:00 UTC
static const double minimumSimTime = -730498278941.99951; // -2000000000 Jan 01 12:00:00 UTC
@ -1035,9 +1036,24 @@ static double getPreferredDistance(const Selection& selection)
switch (selection.getType())
{
case Selection::Type_Body:
return 5.0 * selection.radius();
// Handle reference points (i.e. invisible objects) specially, since the
// actual radius of the point is meaningless. Instead, use the size of
// bounding sphere of all child objects. This is useful for system
// barycenters--the normal goto command will place the observer at
// a viewpoint in which the entire system can be seen.
if (selection.body()->getClassification() == Body::Invisible)
{
double r = selection.body()->getFrameTree()->boundingSphereRadius();
return min(astro::lightYearsToKilometers(0.1), r * 5.0);
}
else
{
return 5.0 * selection.radius();
}
case Selection::Type_DeepSky:
return 5.0 * selection.radius();
case Selection::Type_Star:
if (selection.star()->getVisibility())
{
@ -1045,6 +1061,8 @@ static double getPreferredDistance(const Selection& selection)
}
else
{
// Handle star system barycenters specially, using the same approach as
// for reference points in solar systems.
double maxOrbitRadius = 0.0;
const vector<Star*>* orbitingStars = selection.star()->getOrbitingStars();
if (orbitingStars != NULL)
@ -1063,12 +1081,14 @@ static double getPreferredDistance(const Selection& selection)
else
return maxOrbitRadius * 5.0;
}
case Selection::Type_Location:
{
double maxDist = getPreferredDistance(selection.location()->getParentBody());
return max(min(selection.location()->getSize() * 50.0, maxDist),
1.0);
}
default:
return 1.0;
}