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new command: property-interpolate

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exposes the SGInterpolator to <binding><command>
formerly only accessible via Nasal
This commit is contained in:
Torsten Dreyer 2012-02-02 22:17:34 +01:00
parent 72483d565b
commit 62dfa8cc64
1 changed files with 60 additions and 0 deletions
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60
src/Main/fg_commands.cxx
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@ -23,6 +23,7 @@
#include <simgear/structure/event_mgr.hxx>
#include <simgear/sound/soundmgr_openal.hxx>
#include <simgear/timing/sg_time.hxx>
#include <simgear/misc/interpolator.hxx>
#include <Cockpit/panel.hxx>
#include <Cockpit/panel_io.hxx>
@ -52,6 +53,8 @@
#include <Main/viewer.hxx>
#include <Environment/presets.hxx>
#include <boost/scoped_array.hpp>
using std::string;
using std::ifstream;
using std::ofstream;
@ -930,6 +933,62 @@ do_property_randomize (const SGPropertyNode * arg)
return true;
}
/**
* Built-in command: interpolate a property value over time
*
* property: the name of the property value to interpolate.
* value[0..n] any number of constant values to interpolate
* time[0..n] time between each value, number of time elements must
* match those of value elements
* -or-
* property[1..n] any number of target values taken from named properties
* time[0..n] time between each value, number of time elements must
* match those of property elements minus one
*/
static bool
do_property_interpolate (const SGPropertyNode * arg)
{
SGPropertyNode * prop = get_prop(arg);
simgear::PropertyList valueNodes = arg->getChildren( "value" );
simgear::PropertyList timeNodes = arg->getChildren( "time" );
boost::scoped_array<double> value;
boost::scoped_array<double> time;
if( valueNodes.size() > 0 ) {
// must match
if( timeNodes.size() != valueNodes.size() )
return false;
value.reset( new double[valueNodes.size()] );
for( simgear::PropertyList::size_type n = 0; n < valueNodes.size(); n++ ) {
value[n] = valueNodes[n]->getDoubleValue();
}
} else {
valueNodes = arg->getChildren("property");
// must have one more property node
if( valueNodes.size() - 1 != timeNodes.size() )
return false;
value.reset( new double[valueNodes.size()-1] );
for( simgear::PropertyList::size_type n = 0; n < valueNodes.size()-1; n++ ) {
value[n] = fgGetNode(valueNodes[n+1]->getStringValue(), "/null")->getDoubleValue();
}
}
time.reset( new double[timeNodes.size()] );
for( simgear::PropertyList::size_type n = 0; n < timeNodes.size(); n++ ) {
time[n] = timeNodes[n]->getDoubleValue();
}
((SGInterpolator*)globals->get_subsystem_mgr()
->get_group(SGSubsystemMgr::INIT)->get_subsystem("interpolator"))
->interpolate(prop, timeNodes.size(), value.get(), time.get() );
return true;
}
/**
* Built-in command: reinit the data logging system based on the
@ -1452,6 +1511,7 @@ static struct {
{ "property-scale", do_property_scale },
{ "property-cycle", do_property_cycle },
{ "property-randomize", do_property_randomize },
{ "property-interpolate", do_property_interpolate },
{ "data-logging-commit", do_data_logging_commit },
{ "dialog-new", do_dialog_new },
{ "dialog-show", do_dialog_show },