private double SidePerimeter(LeafPair topLeafPair, LeafPair bottomLeafPair)
{
if (LeafPairsAreOutsideJaw(topLeafPair, bottomLeafPair))
{
return(0.0);
}
// _____ ________
// | |
// _____|___ |________
// +-------|------|---+
// _|_______| |___|_
if (JawTopIsBelowTopLeafPair(topLeafPair))
{
return(bottomLeafPair.FieldSize());
}
// _|___ ______|_
// +---|-------|------+
// _____|___ |________
// | |
// _________| |_____
if (JawBottomIsAboveBottomLeafPair(bottomLeafPair))
{
return(topLeafPair.FieldSize());
}
// At this point, the edge between the top and bottom leaf pairs
// should be fully or partially exposed (depending on the jaw)
// ___ _______________
// +-|--|-------+
// _|_|__|_______|_______
// +-------|----+ |
// _________| |_____
if (LeafPairsAreDisjoint(topLeafPair, bottomLeafPair))
{
return(topLeafPair.FieldSize() + bottomLeafPair.FieldSize());
}
// ___ __________
// +-|-------|--+
// _|_|___ |__|_______
// +-----|------+ |
// _______| |_____
double topEdgeLeft = Math.Max(Jaw.Left, topLeafPair.Left);
double bottomEdgeLeft = Math.Max(Jaw.Left, bottomLeafPair.Left);
double topEdgeRight = Math.Min(Jaw.Right, topLeafPair.Right);
double bottomEdgeRight = Math.Min(Jaw.Right, bottomLeafPair.Right);
return(Math.Abs(topEdgeLeft - bottomEdgeLeft) +
Math.Abs(topEdgeRight - bottomEdgeRight));
}
private static bool LeafPairsAreDisjoint(LeafPair topLeafPair, LeafPair bottomLeafPair)
{
return((bottomLeafPair.Left > topLeafPair.Right) ||
(bottomLeafPair.Right < topLeafPair.Left));
}
private bool LeafPairsAreOutsideJaw(LeafPair topLeafPair, LeafPair bottomLeafPair)
{
return(topLeafPair.IsOutsideJaw() && bottomLeafPair.IsOutsideJaw());
}
private bool JawTopIsBelowTopLeafPair(LeafPair topLeafPair)
{
return(Jaw.Top <= topLeafPair.Bottom);
}
private bool JawBottomIsAboveBottomLeafPair(LeafPair bottomLeafPair)
{
return(Jaw.Bottom >= bottomLeafPair.Top);
}
