//makes a new tile in specified location
private Tile NewTile(int i, int j)
{
Tile t =new Tile();
//location is scroll added to row and column * tile size add the initial grid coordinates
t.Loc = new Vector2((-scrollX+j) * Tile.SIZE + gridX,
(-scrollY+i) * Tile.SIZE + gridY);
return t;
}
//adds specified number of columns, a negative num removes cols
//invert parameter removes it from smaller-index side
public void AddCol(int num, bool invert)
{
if (width + num <= 0) { return; } //cancel if going below 0
Tile[,] g = new Tile[height, width + num];
if (invert) {
scrollX+=num;
if (num < 0 && Math.Abs(num) > scrollX) {
scrollX -= num;
ScrollGrid(+Tile.SIZE * num,0);
}
}
for (int i = 0; i < height; i++) { //fill new grid
for (int j = 0; j < width + num; j++) {
if (j < width && !invert) {
g[i, j] = grid[i, j];
} else if(j>=num && invert){
g[i, j] = grid[i, j - num];
}else {
g[i, j] = NewTile(i, j);
}
}
}
//replace grid with new grid
grid = g;
width += num;
}
//adds specified number of rows, a negative num removes rows
//invert parameter removes it from smaller-index side
public void AddRow(int num,bool invert)
{
if (height + num <= 0) { return; } //cancel if going below 0
Tile[,] g = new Tile[height+num, width];
if (invert) {
scrollY+=num;
if (num < 0 && Math.Abs(num) > scrollY) {
scrollY -= num;
ScrollGrid(0, +Tile.SIZE * num);
}
}
for (int i = 0; i < height+num; i++) { //fill new grid
for (int j = 0; j < width; j++) {
if (i < height && !invert) {
g[i, j] = grid[i, j];
} else if (i >= num && invert) {
g[i, j] = grid[i-num, j];
} else {
g[i, j] = NewTile(i,j);
}
}
}
//replace grid with new grid
grid = g;
height += num;
}
