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Add a new <power> property to allow raising an axis to a power other

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than 1 or 2 (<squared/> still works as well, and is equivalent to
<power>2</power>).
This commit is contained in:
david 2003-03-01 21:28:51 +00:00
parent d38685b92f
commit 58adf467bf
1 changed files with 21 additions and 2 deletions
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23
src/Main/fg_commands.cxx
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@ -619,9 +619,28 @@ do_property_scale (const SGPropertyNode * arg)
double offset = arg->getDoubleValue("offset", 0.0);
double factor = arg->getDoubleValue("factor", 1.0);
bool squared = arg->getBoolValue("squared", false);
int power = arg->getIntValue("power", (squared ? 2 : 1));
if (squared)
setting = (setting < 0 ? -1 : 1) * setting * setting;
int sign = (setting < 0 ? -1 : 1);
switch (power) {
case 1:
break;
case 2:
setting = setting * setting * sign;
break;
case 3:
setting = setting * setting * setting;
break;
case 4:
setting = setting * setting * setting * setting * sign;
break;
default:
setting = pow(setting, power);
if ((power % 2) == 0)
setting *= sign;
break;
}
return prop->setDoubleValue((setting + offset) * factor);
}