private void EnableOnFrameLoading()
{
generateTerrainTree = true;
loadingTextPanel.SetActive(true);
currentBuildStep = TerrainBuildStep.forcePasses;
loadingText.text = "Loading...\nArranging Nodes\n0%";
}
//used to generate terrain trees at run time without crashing the app on android (guaranteed not to make the app hang for too long)
public void Update()
{
if (generateTerrainTree)
{
switch (currentBuildStep)
{
case TerrainBuildStep.forcePasses:
TreeForceApplicator.Pass(leafNodes);
numForceLayoutPassesPerformed++;
if (numForceLayoutPassesPerformed >= TreeForceApplicator.numPasses)
{
currentBuildStep = TerrainBuildStep.checkForCachedHeights;
loadingText.text = "Loading...\nChecking for cached heights";
numForceLayoutPassesPerformed = 0;
}
else
{
loadingText.text = "Loading...\nArranging Nodes\n" +
(float)numForceLayoutPassesPerformed / TreeForceApplicator.numPasses * 100 + "%";
}
break;
case TerrainBuildStep.checkForCachedHeights:
//here we check to see if the terrain has already been generated and cached
if (TreeTerrainBehaviour.instance.TryLoadFromCache())
{ //if it has we can skip over raising and smoothing
currentBuildStep = TerrainBuildStep.nodeRaising;
loadingText.text = "Loading...\nRaising Nodes";
}
else
{
currentBuildStep = TerrainBuildStep.terrainRasing;
loadingText.text = "Loading...\nRaising Terrain\n0%";
}
break;
case TerrainBuildStep.terrainRasing:
//create a queue to store nodes in if one doesn't already exist
if (bfsQueue == null)
{
bfsQueue = new Queue <GameObject>();
//enqueue the root node - the first game object in the hierachy beneath the tree container
bfsQueue.Enqueue(treeContainer.transform.GetChild(0).gameObject);
}
//breadth first raise terrain at leaf nodes in chunks of 10
for (int numReps = 0; numReps < 10; numReps++)
{
if (bfsQueue.Count != 0)
{
GameObject node = bfsQueue.Dequeue();
Node info = node.GetComponent <BasicNodeBehaviour>().getAttachedNodeInfo();
if (info.getNumberOfChildren() == 0)
{
for (int i = 0; i <= info.nodeDepth; i++)
{
TreeTerrainBehaviour.instance.RaiseTerrainTo(node, i, info.nodeDepth);
}
numLeafNodeTerrainRaised++;
}
foreach (Transform child in node.transform)
{
if (child.gameObject.tag == "NodeObject")
{
bfsQueue.Enqueue(child.gameObject);
}
}
}
else
{
currentBuildStep = TerrainBuildStep.terrainSmoothing;
numLeafNodeTerrainRaised = 0;
loadingText.text = "Loading...\nSmoothing Terrain";
break;
}
if (currentBuildStep == TerrainBuildStep.terrainRasing)
{
loadingText.text = "Loading...\nRaising Terrain\n" +
(float)numLeafNodeTerrainRaised / leafNodes.Length * 100 + "%";
}
}
break;
case TerrainBuildStep.terrainSmoothing:
TreeTerrainBehaviour.instance.SmoothTerrain();
//here we cache the terrain heights so we don't have to do these computations again
TreeTerrainBehaviour.instance.CacheTerrainHeights();
currentBuildStep = TerrainBuildStep.nodeRaising;
loadingText.text = "Loading...\nRaising Nodes";
break;
case TerrainBuildStep.nodeRaising:
bfsQueue = new Queue <GameObject>();
//enqueue the root node bring nodes above the terrain
bfsQueue.Enqueue(treeContainer.transform.GetChild(0).gameObject);
//scale is the scale of the sphere renderer component of each node -> identical to the sphere's diameter
//hierachy:
// 0 0 0 1 1 2 n-1 n
//TreeContainer -> Node -> {Renderer -> {Label, Sphere}, Child1, Child2 ... Child n-1, Child n}
float scale = treeContainer.transform.GetChild(0).transform.GetChild(0).GetChild(1).localScale.y;
float radius = scale / 2;
//do the bfs again, this time raise all the non leaf nodes to a height above the terrain
// raise all the parent nodes just above the terrain so the tree remains clear
float parentNodeHeight = TreeTerrainBehaviour.instance.maxTerrainHeight + 0.5f + radius;
while (bfsQueue.Count != 0)
{
GameObject node = bfsQueue.Dequeue();
Node info = node.GetComponent <BasicNodeBehaviour>().getAttachedNodeInfo();
if (info.getNumberOfChildren() > 0)
{
Vector3 pos = node.transform.position;
pos.y = parentNodeHeight;
node.transform.position = pos;
}
else
{
Vector3 pos = node.transform.position;
pos.y = TreeTerrainBehaviour.instance.GlobalHeightAt(node.transform.position) + radius;
node.transform.position = pos;
}
foreach (Transform child in node.transform)
{
if (child.gameObject.tag == "NodeObject")
{
bfsQueue.Enqueue(child.gameObject);
}
}
}
//put the player nice and high in the air so they don't end up inside the terrain
Vector3 playerPos = player.transform.position;
playerPos.y = parentNodeHeight + 1f;
player.transform.position = playerPos;
currentBuildStep = TerrainBuildStep.terrainColouring;
bfsQueue = null;
break;
case TerrainBuildStep.terrainColouring:
TreeTerrainBehaviour.instance.ColourTerrain();
DisableOnFrameLoading();
break;
}
}
}
