private void OffsetPointToBlankTile(ref WrappingScreenGrid grid, MineField mineField, ref Point coordinates)
{
var searchCoordinates = coordinates;
var maskIndex = mineField.GetMaskIndex(coordinates);
var tileFound = false;
for (var maxAdjacents = 1; maxAdjacents < 9; maxAdjacents++)
{
do
{
searchCoordinates.X++;
if (searchCoordinates.X >= mineField.Width)
{
searchCoordinates.X = 0;
searchCoordinates.Y++;
if (searchCoordinates.Y >= mineField.Height)
{
searchCoordinates.Y = 0;
}
if (searchCoordinates.Y % BitMaskGrid.Size == 0)
{
maskIndex += mineField.MasksPerRow;
}
}
if (searchCoordinates.X % BitMaskGrid.Size == 0)
{
maskIndex++;
if (maskIndex >= mineField.MaskAmount)
{
maskIndex = 0;
}
}
if (!mineField.MineMasks[maskIndex][searchCoordinates.X, searchCoordinates.Y] &&
CalculateAdjacents(mineField, searchCoordinates) < maxAdjacents)
{
var offset = coordinates - searchCoordinates; // Swap?
grid.ShiftObserver(offset, out var wrappedBorder);
coordinates = searchCoordinates;
tileFound = true;
break;
}
} while (searchCoordinates != coordinates);
if (tileFound)
{
break;
}
}
}
private void RecalculateFrames(ref WrappingScreenGrid grid, MineField mineField, Point shift,
Vector2 cameraPosition)
{
grid.ShiftObserver(shift, out var wrappedBorder);
if (shift.X != 0)
{
RecalculateHorizontalFrames(ref grid, mineField, shift.X, wrappedBorder);
}
if (shift.Y != 0)
{
RecalculateVerticalFrames(ref grid, mineField, shift.Y, wrappedBorder);
}
}