Quantity Constraint::getPresentationValue() const
{
Quantity quantity;
switch (Type) {
case Distance:
case Radius:
case DistanceX:
case DistanceY:
quantity.setValue(Value);
quantity.setUnit(Unit::Length);
break;
case Angle:
quantity.setValue(toDegrees<double>(Value));
quantity.setUnit(Unit::Angle);
break;
case SnellsLaw:
quantity.setValue(Value);
break;
default:
quantity.setValue(Value);
break;
}
QuantityFormat format = quantity.getFormat();
format.option = QuantityFormat::None;
format.format = QuantityFormat::Default;
format.precision = 6; // QString's default
quantity.setFormat(format);
return quantity;
}
Expression * AggregateFunctionExpression::eval() const
{
switch (static_cast<Function>(f)) {
case SUM:
case AVERAGE:
case STDDEV:
case COUNT:
case MIN:
case MAX:
{
RangeExpression * v = freecad_dynamic_cast<RangeExpression>(args[0]);
Quantity q;
Quantity mean;
Quantity M2;
int n = 0;
bool first = true;
if (!v)
throw Exception("Expected range as argument");
Range range(v->getRange());
do {
Property * p = owner->getPropertyByName(range.address().c_str());
PropertyQuantity * qp;
PropertyFloat * fp;
Quantity value;
if (!p)
continue;
if ((qp = freecad_dynamic_cast<PropertyQuantity>(p)) != 0)
value = qp->getQuantityValue();
else if ((fp = freecad_dynamic_cast<PropertyFloat>(p)) != 0)
value = fp->getValue();
else
throw Exception("Invalid property type for aggregate");
if (first) {
q.setUnit(value.getUnit());
mean.setUnit(value.getUnit());
M2.setUnit(value.getUnit());
}
switch (static_cast<Function>(f)) {
case AVERAGE:
n++;
case SUM:
q = q + value;
break;
case STDDEV: {
n++;
const Quantity delta = value - mean;
mean = mean + delta / n;
M2 = M2 + delta * (value - mean);
break;
}
case COUNT:
q = q + 1;
break;
case MIN:
if (first || value < q)
q = value;
break;
case MAX:
if (first || value > q)
q = value;
break;
default:
break;
}
first = false;
} while (range.next());
switch (static_cast<Function>(f)) {
case AVERAGE:
q = q / (double)n;
break;
case STDDEV:
if (n < 2)
q = Quantity();
else
q = (M2 / (n - 1.0)).pow(Quantity(0.5));
break;
default:
break;
}
return new NumberExpression(owner, q);
}
default:
return App::FunctionExpression::eval();
}
}
