public LayoutScore Times(double weightScale)
{
LayoutScore product = new LayoutScore();
foreach (ListItemStats <double, double> item in this.components.AllItems)
{
product.addComponent(item.Key, item.Value * weightScale);
}
return(product);
}
public LayoutScore ComponentRange(int minIndexInclusive, int maxIndexExclusive)
{
LayoutScore range = new LayoutScore();
List <ListItemStats <double, double> > subComponents = this.components.ItemsBetweenIndices(minIndexInclusive, maxIndexExclusive);
foreach (ListItemStats <double, double> component in subComponents)
{
range.addComponent(component.Key, component.Value);
}
return(range);
}
public LayoutScore Plus(LayoutScore other)
{
int ourIndex = 0;
int theirIndex = 0;
LayoutScore sum = new LayoutScore();
while (true)
{
double priority;
double weight = 0;
if (ourIndex < this.components.NumItems)
{
if (theirIndex < other.components.NumItems)
{
// both coordinates exist
ListItemStats <double, double> ourComponent = this.components.GetValueAtIndex(ourIndex);
ListItemStats <double, double> theirComponent = other.components.GetValueAtIndex(theirIndex);
priority = Math.Min(ourComponent.Key, theirComponent.Key);
if (ourComponent.Key == priority)
{
weight += ourComponent.Value;
ourIndex++;
}
if (theirComponent.Key == priority)
{
if (double.IsInfinity(weight) && double.IsInfinity(theirComponent.Value) &&
double.IsPositiveInfinity(weight) != double.IsPositiveInfinity(theirComponent.Value))
{
// Treat negative infinity plus positive infinity as zero
weight = 0;
}
else
{
weight += theirComponent.Value;
}
theirIndex++;
}
}
else
{
// only our coordinate exists
ListItemStats <double, double> ourComponent = this.components.GetValueAtIndex(ourIndex);
priority = ourComponent.Key;
weight = ourComponent.Value;
ourIndex++;
}
}
else
{
if (theirIndex < other.components.NumItems)
{
// only their coordinate exists
ListItemStats <double, double> theirComponent = other.components.GetValueAtIndex(theirIndex);
priority = theirComponent.Key;
weight = theirComponent.Value;
theirIndex++;
}
else
{
// no more components are left
// debug-check: make sure there are no duplicate coordinates
int i;
for (i = 1; i < sum.components.NumItems; i++)
{
if (sum.components.GetValueAtIndex(i - 1).Key == sum.components.GetValueAtIndex(i).Key)
{
System.Diagnostics.Debug.WriteLine("error: layout score has a duplicate key");
}
}
return(sum);
}
}
// only add the coordinate if it is nonzero, because zeros are always provided by default
if (weight != 0)
{
sum.addComponent(priority, weight);
}
}
}