public void GetRectRegionsChanged(
Recti other,
out Recti thisOnly1,
out Recti thisOnly2,
out Recti otherOnly1,
out Recti otherOnly2)
{
this.GetRectRegionsAdded(other, out otherOnly1, out otherOnly2);
other.GetRectRegionsAdded(this, out thisOnly1, out thisOnly2);
}
// Calculates the limits for the set of tiles that are contained in
// the new region but are not present in this one. The caller can
// iterate through the new tiles by iterating through all the
// locations within the returned rectangles. Note that the
// rectangle coordinates are *inclusive*, so the right/bottom members
// are actually part of the set.
// This method requires that the size of the two rectangles is exactly
// the same, otherwise it will miss tiles.
public void GetRectRegionsAdded(Recti other, out Recti d1, out Recti d2)
{
bool thisIsValid = this.IsValid;
bool otherIsValid = other.IsValid;
if (thisIsValid && !otherIsValid)
{
d1 = Recti.invalid;
d2 = Recti.invalid;
return;
}
if (!thisIsValid && otherIsValid)
{
d1 = other;
d2 = Recti.invalid;
return;
}
if (!this.IsSameSizeAs(other))
{
throw new System.NotSupportedException("Don't use Recti.GetRectRegionsAdded with rects of different sizes");
}
bool rectanglesDontOverlap =
other.xMin > this.xMax ||
other.xMax <this.xMin ||
other.yMin> this.yMax ||
other.yMax < this.yMin;
if (rectanglesDontOverlap)
{
d1 = other;
d2 = Recti.invalid;
return;
}
d1.xMin = other.xMin;
d1.xMax = other.xMax;
if (other.yMin < this.yMin)
{
d1.yMin = other.yMin;
d1.yMax = this.yMin - 1;
d2.yMin = this.yMin;
d2.yMax = other.yMax;
}
else if (other.yMin > this.yMin)
{
d1.yMin = this.yMax + 1;
d1.yMax = other.yMax;
d2.yMin = other.yMin;
d2.yMax = this.yMax;
}
else
{
d1 = Recti.invalid;
d2.yMin = this.yMin;
d2.yMax = this.yMax;
}
if (other.xMin < this.xMin)
{
d2.xMin = other.xMin;
d2.xMax = this.xMin - 1;
}
else if (other.xMin > this.xMin)
{
d2.xMin = this.xMax + 1;
d2.xMax = other.xMax;
}
else
{
d2 = Recti.invalid;
}
}
public bool IsSameSizeAs(Recti other)
{
return(this.IsValid && other.Width == this.Width && other.Height == this.Height);
}