public GridBlockCollection GetBlocksAroundLine(Vector3 startPoint, Vector3 endPoint)
{
GridBlockCollection gridBlockCollection = new GridBlockCollection(false);
Vector3 currentPoint = startPoint;
Vector3 direction = Vector3.Normalize(endPoint - startPoint);
Single originalDistance = Vector3.Distance(currentPoint, endPoint);
while (Vector3.Distance(startPoint, currentPoint) < originalDistance)
{
GridBlock block = GetBlockByLocation(currentPoint.X, currentPoint.Y);
if (block != null && !gridBlockCollection.Contains(block))
{
gridBlockCollection.Add(block);
}
currentPoint += direction;
}
for (Int32 i = gridBlockCollection.Count - 1; i >= 0; i--)
{
GridBlock block = gridBlockCollection[i];
if (block == null)
{
continue;
}
if (block.ContainerBox == null)
{
continue;
}
if (block.ContainerBox.LineInBox(startPoint, endPoint))
{
continue;
}
gridBlockCollection.RemoveAt(i);
}
return(gridBlockCollection);
}