//Delete Row by preserving the rows below the one being deleted, shifting the rows, and then combining those two
public void DeleteRow(int row)
{
row = Math.Abs (row);
BitArray preShiftedGrid = (BitArray)this.mBitArray.Clone ();
BitArray bottomRowsMask = new BitArray (mColumnCount * mRowCount);
for (int i = ((row + 1) * mColumnCount); i < (mRowCount * mColumnCount); ++i) { //bottomRowsMask = everything below full row
bottomRowsMask [i] = true; //-192 > -192
}
//UnityEngine.Debug.Log ("Before shift" + ++mDebugId);
//this.PrintBitArray ();
//shift - CAN'T do via mask because I don't have one consecutive array of bits in C#.
//They are split up across ints, which makes shifting a bitch - I still have to copy between ints
//(last part of int to first part of next int...), so it is easier just to use byte array.
for (int i = mRowCount -1; i > 0; --i) {
this.mRowBytes [i] = this.mRowBytes [i - 1];
}
this.mRowBytes [0] = 0; //explicitly set top row to 0s now that we shifted down
this.UpdateBitArrayBasedOnRowBytes ();
//UnityEngine.Debug.Log ("After shift" + ++mDebugId);
//this.PrintBitArray ();
BitArray topRowsMask = new BitArray (mColumnCount * mRowCount);
for (int i = (((row +1) * mColumnCount)-1); i >= 0; --i) { //includes the full row, and all rows above it
topRowsMask [i] = true;
}
TetrisGrid ans = new TetrisGrid (mRowCount, mColumnCount);
ans.mBitArray = (preShiftedGrid.And (bottomRowsMask)).Or (this.mBitArray.And (topRowsMask)); //
this.mBitArray = ans.mBitArray;
//UnityEngine.Debug.Log ("Answer" + ++mDebugId);
//ans.PrintBitArray ();
}
public void Initialize(int rowCount, int columnCount)
{
mRowCount = rowCount;
mColumnCount = columnCount;
mPlacedShapeCount = 0;
mListOfShapes = new System.Collections.ArrayList ();
mSceneGrid = new TetrisGrid (mRowCount, mColumnCount);
}
public List<int> GetFullRows()
{
List<int> fullRows = new List<int> ();
//Check for full rows using bit masks
for (int i = 0; i < mRowCount; ++i) {
TetrisGrid fullRowMask = new TetrisGrid (mRowCount, mColumnCount);
fullRowMask.mRowBytes [i] = Byte.MaxValue;
fullRowMask.UpdateBitArrayBasedOnRowBytes ();
BitArray clone = (BitArray)this.mBitArray.Clone (); //need to clone because AND will modify left-hand arg
if (fullRowMask.Equals (clone.And (fullRowMask.mBitArray)))
fullRows.Add (i);
}
return fullRows;
}