public void UpdateCollisionInArea(Pos pos)
{
//TODO use rects
//Debug.Log("GenerateCollisionInArea: " + pos.x + " , " + pos.y + ", areaWidth: " + _parameters.areaWidth + ", areaHeight:" + _parameters.areaHeight);
var rect = new Rect(pos.x - _parameters.areaWidth / 2f, pos.y - _parameters.areaHeight / 2f, _parameters.areaWidth, _parameters.areaHeight);
//_lastRect
for (int x = (int)rect.xMin; x < (int)rect.xMax; x++)
{
for (int y = (int)rect.yMin; y < (int)rect.yMax; y++)
{
var tilePos = new Pos(x, y);
var blockType = _mapInfo.GetBlockAt(tilePos);
bool hasCollider = _colliders.ContainsKey(tilePos);
if (blockType == BlockType.EMPTY)
{
if (hasCollider)
{
var coll = _colliders[tilePos];
_colliderPool.Return(coll);
_colliders.Remove(tilePos);
}
continue;
}
if (hasCollider)
{
continue;
}
var collInst = _colliderPool.Get();
collInst.offset = new Vector2(x, y) + Vector2.one * 0.5f;
collInst.size = Vector2.one;
_colliders.Add(new Pos(x, y), collInst);
}
}
_lastRect = rect;
}
private List <Pos> GetTilesOnBresenhamLine(int xStart, int yStart, int xEnd, int yEnd)
{
var tilesOnLine = new List <Pos>();
int x, y, sx = 0, sy = 0;
int dx = Mathf.Abs(xEnd - xStart);
int dy = Mathf.Abs(yEnd - yStart);
if (xStart < xEnd)
{
sx = 1;
}
else if (xStart > xEnd)
{
sx = -1;
}
if (yStart < yEnd)
{
sy = 1;
}
else if (yStart > yEnd)
{
sy = -1;
}
int err = dx - dy;
int err2 = 0;
x = xStart;
y = yStart;
while (true)
{
tilesOnLine.Add(new Pos(x, y));
//var blockType = _mapInfo.GetBlockAt(x, y);
if (x == xEnd && y == yEnd || (int)_mapInfo.GetBlockAt(x, y) >= (int)BlockType.IMPASSABLE)
{
break; //has reached goal?
}
err2 = err * 2;
if (err2 > -dy)
{
err = err - dy;
x = x + sx;
tilesOnLine.Add(new Pos(x, y + sy));
if (_mapInfo.GetBlockAt(x, y + sy) >= BlockType.IMPASSABLE)
{
break;
}
}
if (x == xEnd && y == yEnd || (int)_mapInfo.GetBlockAt(x, y) >= (int)BlockType.IMPASSABLE) //has reached goal now???
{
tilesOnLine.Add(new Pos(x, y));
break;
}
if (err2 < dx)
{
err = err + dx;
y = y + sy;
tilesOnLine.Add(new Pos(x + sx, y));
if ((int)_mapInfo.GetBlockAt(x + sx, y) >= (int)BlockType.IMPASSABLE)
{
break;
}
}
}
return(tilesOnLine);
}