//returns \cup_{rectangle in list}(rectanlge \cap intersect)
public static ListOperations regionListIntersect(ListOperations rectList, Rectangle intersect)
{
ListOperations result = new ListOperations();
foreach (Rectangle item in rectList)
{
result.Add(Rectangle.intersection(item, intersect));
if (result[result.Count() - 1].getInvalid())
{
result.RemoveAt(result.Count() - 1);
}
}
return(result);
}
public static ListOperations AddIntoRectangle(Rectangle old, Rectangle add, bool XOR)
{
ListOperations aList = new ListOperations();
int oldMinX = old.getCoord()[0];
int oldMaxX = old.getCoord()[1];
int oldMinY = old.getCoord()[2];
int oldMaxY = old.getCoord()[3];
int addMinX = add.getCoord()[0];
int addMaxX = add.getCoord()[1];
int addMinY = add.getCoord()[2];
int addMaxY = add.getCoord()[3];
if (subset(old,add))
{
if (XOR)
{
Rectangle upper = new Rectangle(oldMinX, oldMaxX, oldMaxY + 1, addMaxY);
Rectangle lower = new Rectangle(oldMinX, oldMaxX, addMinY, oldMinY - 1);
Rectangle left = new Rectangle(addMinX, oldMinX - 1, addMinY, addMaxY);
Rectangle right = new Rectangle(oldMaxX + 1, addMaxX, addMinY, addMaxY);
aList.validAdd(upper, true);
aList.validAdd(lower, true);
aList.validAdd(left, true);
aList.validAdd(right, true);
return aList;
}
aList.Add(add);
return aList;
}
if(subset(add, old))
{
if (XOR)
{
Rectangle upper = new Rectangle(oldMinX, oldMaxX, oldMaxY + 1, addMaxY);
Rectangle lower = new Rectangle(oldMinX, oldMaxX, addMinY, oldMinY - 1);
Rectangle left = new Rectangle(addMinX, oldMinX - 1, addMinY, addMaxY);
Rectangle right = new Rectangle(oldMaxX + 1, addMaxX, addMinY, addMaxY);
aList.validAdd(upper, true);
aList.validAdd(lower, true);
aList.validAdd(left, true);
aList.validAdd(right, true);
return aList;
}
return aList;
}
if((Rectangle.intersection(old,add).getInvalid()))
{
aList.Add(add);
return aList;
}
//new Rectangle between old bounds
if ((oldMinX <= addMinX) && (addMaxX <= oldMaxX))
{
Rectangle lower = new Rectangle(addMinX, addMaxX, addMinY, oldMinY-1);
Rectangle upper = new Rectangle(addMinX, addMaxX, oldMaxY+1, addMaxY);
aList.validAdd(lower, true);
aList.validAdd(upper, true);
return aList;
}
//new Rectangle exceeds old bounds
if ((addMinX <= oldMinX) && (oldMaxX <= addMaxX))
{
Rectangle upper = new Rectangle(oldMinX, oldMaxX, oldMaxY+1, addMaxY);
Rectangle lower = new Rectangle(oldMinX, oldMaxX, addMinY, oldMinY-1);
Rectangle left = new Rectangle(addMinX, oldMinX-1, addMinY, addMaxY);
Rectangle right = new Rectangle(oldMaxX+1, addMaxX, addMinY, addMaxY);
aList.validAdd(upper, true);
aList.validAdd(lower, true);
aList.validAdd(left, true);
aList.validAdd(right, true);
return aList;
}
//new Rectangle left of old bounds
if ((oldMinX <= addMaxX) && (addMaxX <= oldMaxX))
{
Rectangle upper = new Rectangle(oldMinX, addMaxX, oldMaxY+1, addMaxY);
Rectangle lower = new Rectangle(oldMinX, addMaxX, addMinY, oldMinY-1);
Rectangle left = new Rectangle(addMinX, oldMinX-1, addMinY, addMaxY);
aList.validAdd(upper, true);
aList.validAdd(lower, true);
aList.validAdd(left, true);
return aList;
}
//new Rectangle right of old bounds
if ((addMinX <= oldMaxX) && (oldMaxX <= addMaxX))
{
Rectangle upper = new Rectangle(addMinX, oldMaxX, oldMaxY+1, addMaxY);
Rectangle lower = new Rectangle(addMinX, oldMaxX, addMinY, oldMinY-1);
Rectangle right = new Rectangle(oldMaxX+1, addMaxX, addMinY, addMaxY);
aList.validAdd(upper, true);
aList.validAdd(lower, true);
aList.validAdd(right, true);
return aList;
}
return aList;
}
