private void filterSelfSubAreas(List <IntegerRectangle> areas)
{
for (int i = areas.Count - 1; i >= 0; i--)
{
IntegerRectangle filtered = areas[i];
for (int j = areas.Count - 1; j >= 0; j--)
{
if (i != j)
{
IntegerRectangle area = areas[j];
if (filtered.x >= area.x && filtered.y >= area.y && filtered.right <= area.right && filtered.bottom <= area.bottom)
{
freeRectangle(filtered);
IntegerRectangle topOfStack = areas.Pop();
if (i < areas.Count)
{
// Move the one on the top to the freed position
areas[i] = topOfStack;
}
break;
}
}
}
}
}
public IntegerRectangle getRectangle(int index, IntegerRectangle rectangle)
{
IntegerRectangle inserted = mInsertedRectangles[index];
rectangle.x = inserted.x;
rectangle.y = inserted.y;
rectangle.width = inserted.width;
rectangle.height = inserted.height;
return(rectangle);
}
private IntegerRectangle allocateRectangle(int x, int y, int width, int height)
{
if (mRectangleStack.Count > 0)
{
IntegerRectangle rectangle = mRectangleStack.Pop();
rectangle.x = x;
rectangle.y = y;
rectangle.width = width;
rectangle.height = height;
rectangle.right = x + width;
rectangle.bottom = y + height;
return(rectangle);
}
return(new IntegerRectangle(x, y, width, height));
}
private void generateDividedAreas(IntegerRectangle divider, IntegerRectangle area, List <IntegerRectangle> results)
{
int count = 0;
int rightDelta = area.right - divider.right;
if (rightDelta > 0)
{
results.Add(allocateRectangle(divider.right, area.y, rightDelta, area.height));
count++;
}
int leftDelta = divider.x - area.x;
if (leftDelta > 0)
{
results.Add(allocateRectangle(area.x, area.y, leftDelta, area.height));
count++;
}
int bottomDelta = area.bottom - divider.bottom;
if (bottomDelta > 0)
{
results.Add(allocateRectangle(area.x, divider.bottom, area.width, bottomDelta));
count++;
}
int topDelta = divider.y - area.y;
if (topDelta > 0)
{
results.Add(allocateRectangle(area.x, area.y, area.width, topDelta));
count++;
}
if (count == 0 && (divider.width < area.width || divider.height < area.height))
{
// Only touching the area, store the area itself
results.Add(area);
}
else
{
freeRectangle(area);
}
}
public int packRectangles(bool sort = true)
{
if (sort)
{
mInsertList.Sort((emp1, emp2) => emp1.width.CompareTo(emp2.width));
}
while (mInsertList.Count > 0)
{
SortableSize sortableSize = mInsertList.Pop();
int width = sortableSize.width;
int height = sortableSize.height;
int index = getFreeAreaIndex(width, height);
if (index >= 0)
{
IntegerRectangle freeArea = mFreeAreas[index];
IntegerRectangle target = allocateRectangle(freeArea.x, freeArea.y, width, height);
target.id = sortableSize.id;
// Generate the new free areas, these are parts of the old ones intersected or touched by the target
generateNewFreeAreas(target, mFreeAreas, mNewFreeAreas);
while (mNewFreeAreas.Count > 0)
{
mFreeAreas.Add(mNewFreeAreas.Pop());
}
mInsertedRectangles.Add(target);
if (target.right > mPackedWidth)
{
mPackedWidth = target.right;
}
if (target.bottom > mPackedHeight)
{
mPackedHeight = target.bottom;
}
}
freeSize(sortableSize);
}
return(rectangleCount);
}
private int getFreeAreaIndex(int width, int height)
{
IntegerRectangle best = mOutsideRectangle;
int index = -1;
int paddedWidth = width + mPadding;
int paddedHeight = height + mPadding;
int count = mFreeAreas.Count;
for (int i = count - 1; i >= 0; i--)
{
IntegerRectangle free = mFreeAreas[i];
if (free.x < mPackedWidth || free.y < mPackedHeight)
{
// Within the packed area, padding required
if (free.x < best.x && paddedWidth <= free.width && paddedHeight <= free.height)
{
index = i;
if ((paddedWidth == free.width && free.width <= free.height && free.right < mWidth) || (paddedHeight == free.height && free.height <= free.width))
{
break;
}
best = free;
}
}
else
{
// Outside the current packed area, no padding required
if (free.x < best.x && width <= free.width && height <= free.height)
{
index = i;
if ((width == free.width && free.width <= free.height && free.right < mWidth) || (height == free.height && free.height <= free.width))
{
break;
}
best = free;
}
}
}
return(index);
}
private void generateNewFreeAreas(IntegerRectangle target, List <IntegerRectangle> areas, List <IntegerRectangle> results)
{
// Increase dimensions by one to get the areas on right / bottom this rectangle touches
// Also add the padding here
int x = target.x;
int y = target.y;
int right = target.right + 1 + mPadding;
int bottom = target.bottom + 1 + mPadding;
IntegerRectangle targetWithPadding = null;
if (mPadding == 0)
{
targetWithPadding = target;
}
for (int i = areas.Count - 1; i >= 0; i--)
{
IntegerRectangle area = areas[i];
if (!(x >= area.right || right <= area.x || y >= area.bottom || bottom <= area.y))
{
if (targetWithPadding == null)
{
targetWithPadding = allocateRectangle(target.x, target.y, target.width + mPadding, target.height + mPadding);
}
generateDividedAreas(targetWithPadding, area, results);
IntegerRectangle topOfStack = areas.Pop();
if (i < areas.Count)
{
// Move the one on the top to the freed position
areas[i] = topOfStack;
}
}
}
if (targetWithPadding != null && targetWithPadding != target)
{
freeRectangle(targetWithPadding);
}
filterSelfSubAreas(results);
}
private void freeRectangle(IntegerRectangle rectangle)
{
mRectangleStack.Add(rectangle);
}
public int getRectangleId(int index)
{
IntegerRectangle inserted = mInsertedRectangles[index];
return(inserted.id);
}