public CellEnumerator(LeapGrid grid)
{
this.grid = grid;
this.idx = -1;
this.cellWidth = grid.rect.radii.x * 2f / grid.numCols;
this.cellHeight = grid.rect.radii.y * 2f / grid.numRows;
_useSubGrid = false;
_col0 = 0; _col1 = 0;
_lastIndex = grid.numCells - 1;
}
/// <summary> Initializes a CellEnumerator that enumerates cells within
/// the rectangular subgrid defined by cell indices at two opposite
/// corners of the subgrid. </summary>
public CellEnumerator(LeapGrid grid, int subGridBegin, int subGridEnd) :
this(grid)
{
int idx0 = subGridBegin, idx1 = subGridEnd;
int row0 = grid.getRow(idx0), row1 = grid.getRow(idx1);
if (row0 > row1)
{
Utils.Swap(ref row0, ref row1);
}
int col0 = grid.getCol(idx0), col1 = grid.getCol(idx1);
if (col0 > col1)
{
Utils.Swap(ref col0, ref col1);
}
_col0 = col0; _col1 = col1;
_lastIndex = Mathf.Max(subGridBegin, subGridEnd);
idx = grid.getIndex(row0, col0) - 1;
_useSubGrid = true;
}