public bool Contains(NavRegion other)
{
return(this.startX <= other.startX &&
this.endX >= other.endX &&
this.startZ <= other.startZ &&
this.endZ >= other.endZ);
}
public static int GetWeightedDistance(int fromX, int fromZ, NavRegion to, Fraction xSpeed, Fraction zSpeed)
{
int xDistance;
if (to.endX <= fromX) // Target is to the left
{
xDistance = fromX - (to.endX - 1);
}
else if (to.startX > fromX) // Target is to the right
{
xDistance = to.startX - fromX;
}
else // Intersection on X axis
{
xDistance = 0;
}
int zDistance;
if (to.endZ <= fromZ) // Target is in front
{
zDistance = fromZ - (to.endZ - 1);
}
else if (to.startZ >= fromZ) // Target is behind
{
zDistance = to.startZ - fromZ;
}
else // Intersection on Z axis
{
zDistance = 0;
}
int xWeightedDistance = (xDistance * zSpeed.numerator) / zSpeed.denominator;
int zWeightedDistance = (zDistance * xSpeed.numerator) / xSpeed.denominator;
if (xWeightedDistance >= zWeightedDistance) // Left or right or intersection
{
return(xWeightedDistance * PrimaryDistanceWeight + zWeightedDistance * SecondaryDistanceWeight);
}
else // Above or below
{
return(zWeightedDistance * PrimaryDistanceWeight + zWeightedDistance * SecondaryDistanceWeight);
}
}
// TODO: PERF: Lots of calls to this method only require the distance! (use GetWeightedDistance)
public static int GetWeightedDistanceAndClip(NavRegion from, NavRegion to, Fraction xSpeed, Fraction zSpeed, out NavRegion clipped)
{
int xDistance;
if (to.endX <= from.startX) // Target is to the left
{
clipped.startX = to.endX - 1;
clipped.endX = to.endX;
xDistance = from.startX - (to.endX - 1);
}
else if (to.startX >= from.endX) // Target is to the right
{
clipped.startX = to.startX;
clipped.endX = to.startX + 1;
xDistance = to.startX - (from.endX - 1);
}
else // Intersection on X axis
{
clipped.startX = to.startX;
clipped.endX = to.endX;
xDistance = 0;
}
int zDistance;
if (to.endZ <= from.startZ) // Target is in front
{
clipped.startZ = to.endZ - 1;
clipped.endZ = to.endZ;
zDistance = from.startZ - (to.endZ - 1);
}
else if (to.startZ >= from.endZ) // Target is behind
{
clipped.startZ = to.startZ;
clipped.endZ = to.startZ + 1;
zDistance = to.startZ - (from.endZ - 1);
}
else // Intersection on Z axis
{
clipped.startZ = to.startZ;
clipped.endZ = to.endZ;
zDistance = 0;
}
int xWeightedDistance = (xDistance * zSpeed.numerator) / zSpeed.denominator;
int zWeightedDistance = (zDistance * xSpeed.numerator) / xSpeed.denominator;
if (xWeightedDistance == 0 && zWeightedDistance == 0) // Intersection
{
clipped.startX = Math.Max(from.startX, to.startX);
clipped.startZ = Math.Max(from.startZ, to.startZ);
clipped.endX = Math.Min(from.endX, to.endX);
clipped.endZ = Math.Min(from.endZ, to.endZ);
return(0);
}
else if (xWeightedDistance >= zWeightedDistance) // Left or right (also corner)
{
int expand = Fraction.MultiplyDivideTruncate(xDistance, zSpeed, xSpeed); // (xDistance * zSpeed / xSpeed)
int bottomEdge = from.startZ - expand;
int topEdge = from.endZ + expand;
clipped.startZ = Math.Max(to.startZ, bottomEdge);
clipped.endZ = Math.Min(to.endZ, topEdge);
return(xWeightedDistance * PrimaryDistanceWeight + zWeightedDistance * SecondaryDistanceWeight);
}
else // Above or below
{
int expand = Fraction.MultiplyDivideTruncate(zDistance, xSpeed, zSpeed); // (zDistance * xSpeed / zSpeed)
int leftEdge = from.startX - expand;
int rightEdge = from.endX + expand;
clipped.startX = Math.Max(to.startX, leftEdge);
clipped.endX = Math.Min(to.endX, rightEdge);
return(zWeightedDistance * PrimaryDistanceWeight + zWeightedDistance * SecondaryDistanceWeight);
}
}