/*
* Updates the internal quadtree to make it identical to the given terrain
* quadtree. Collects the tasks necessary to create the missing texture
* tiles, corresponding to newly created quads.
*/
protected virtual void GetTiles(QuadTree parent, ref QuadTree tree, TerrainQuad quad)
{
//if tree not created, create a new tree and check if its tile is needed
if (tree == null)
{
tree = new QuadTree(parent);
tree.needTile = NeedTile(quad);
}
//If this trees tile is needed get a tile and add its task to the schedular if the task is not already done
if (tree.needTile && tree.tile == null)
{
tree.tile = m_producer.GetTile(quad.GetLevel(), quad.GetTX(), quad.GetTY());
if (!tree.tile.GetTask().IsDone())
{
//if task not done schedule task
m_manager.GetSchedular().Add(tree.tile.GetTask());
}
}
if (!quad.IsLeaf() && m_producer.HasChildren(quad.GetLevel(), quad.GetTX(), quad.GetTY()))
{
for (int i = 0; i < 4; ++i)
{
GetTiles(tree, ref tree.children[i], quad.GetChild(i));
}
}
}
/*
* Updates the internal quadtree to make it identical to the given terrain
* quadtree. This method releases the texture tiles corresponding to
* deleted quads.
*/
protected virtual void PutTiles(QuadTree tree, TerrainQuad quad)
{
if (tree == null)
{
return;
}
//Check if this tile is needed, if not put tile.
tree.needTile = NeedTile(quad);
if (!tree.needTile && tree.tile != null)
{
m_producer.PutTile(tree.tile);
tree.tile = null;
}
//If this qiad is a leaf then all children of the tree are not needed
if (quad.IsLeaf())
{
if (!tree.IsLeaf())
{
tree.RecursiveDeleteChildren(this);
}
}
else if (m_producer.HasChildren(quad.GetLevel(), quad.GetTX(), quad.GetTY()))
{
for (int i = 0; i < 4; ++i)
{
PutTiles(tree.children[i], quad.GetChild(i));
}
}
}
