void Start()
{
/*
* if (!m_UsedCamera)
* m_UsedCamera = Camera.main;
*/
for (int i = 0; i < m_ManagedTerrains.Length; i++)
{
TreeSystemTerrain terrain = m_ManagedTerrains[i];
if (terrain.m_ManagedTerrain != null)
{
terrain.m_ManagedTerrain.drawTreesAndFoliage = false;
}
terrain.m_CellsStructured = new TreeSystemStructuredTrees[terrain.m_CellCount, terrain.m_CellCount];
CullingGroup cullingGroup = new CullingGroup();
BoundingSphere[] bounds = new BoundingSphere[terrain.m_Cells.Length];
for (int j = 0; j < terrain.m_Cells.Length; j++)
{
// TODO: maybe allocate dinamically at runtime based on cell visibility to save memory
terrain.m_Cells[j].m_InstanceData = new TreeSystemLODInstance[terrain.m_Cells[j].m_Instances.Length];
// TODO: structure cell data
// Create the culling group data
bounds[j] = new BoundingSphere(terrain.m_Cells[j].m_BoundsSphere.m_CenterRadius);
// Structure cell data
RowCol pos = terrain.m_Cells[j].m_Position;
terrain.m_CellsStructured[pos.m_Row, pos.m_Col] = terrain.m_Cells[j];
}
if (!m_Settings.m_UsedCamera)
{
cullingGroup.targetCamera = Camera.main;
}
else
{
cullingGroup.targetCamera = m_Settings.m_UsedCamera;
}
cullingGroup.SetBoundingSpheres(bounds);
cullingGroup.SetBoundingSphereCount(bounds.Length);
// Save the bounds just in case we might need them
terrain.m_CullingGroupSpheres = bounds;
terrain.m_CullingGroup = cullingGroup;
}
if (m_Settings.m_ApplyTreeColliders)
{
SetApplyColliders(true);
}
}
void Update()
{
m_DataIssuedMeshTrees = 0;
m_DataIssuedTerrainCells = 0;
m_DataIssuedTerrains = 0;
m_DataIssuesDrawCalls = 0;
Camera camera = Camera.main;
// Calculate planes and camera position
ExtractPlanes(m_PlanesTemp, camera.projectionMatrix * camera.worldToCameraMatrix);
m_CameraPosTemp = camera.transform.position;
// Update the wind block data
for (int proto = 0; proto < m_ManagedPrototypes.Length; proto++)
{
TreeSystemLODData[] lod = m_ManagedPrototypes[proto].m_LODData;
for (int i = 0; i < lod.Length; i++)
{
lod[i].CopyBlock();
}
}
float x, y, z;
float treeDistSqr = m_Settings.m_MaxTreeDistance * m_Settings.m_MaxTreeDistance;
for (int i = 0; i < m_ManagedTerrains.Length; i++)
{
TreeSystemTerrain terrain = m_ManagedTerrains[i];
// Get closest point
Vector3 pt = terrain.m_ManagedTerrainBounds.ClosestPoint(m_CameraPosTemp);
// Check if terrain is within reach range
x = pt.x - m_CameraPosTemp.x;
y = pt.y - m_CameraPosTemp.y;
z = pt.z - m_CameraPosTemp.z;
float distToTerrain = x * x + y * y + z * z;
if (distToTerrain < treeDistSqr)
{
// If the terrain is within tree range
ProcessTerrain(terrain, ref treeDistSqr);
m_DataIssuedTerrains++;
}
}
if (Time.frameCount % 60 == 0)
{
Debug.Log("Issued terrains: " + m_DataIssuedTerrains + " issued cells: " + m_DataIssuedTerrainCells + " issued trees:" + m_DataIssuedMeshTrees + " issued draw calls:" + m_DataIssuesDrawCalls);
}
}
private void ProcessTerrain(TreeSystemTerrain terrain, ref float treeDistSqr, ref float shadowDistSqr)
{
TreeSystemStructuredTrees[] cells = terrain.m_Cells;
CullingGroup culling = terrain.m_CullingGroup;
float x, y, z;
// TODO: calculate based on bounds index the cells that we'll iterate like the grass system
// We won't require to iterate all the cells but the neighbors of the current cell only
// TODO: only get the data from the culling group API at the moment
// Go bounds by bounds
for (int cellIdx = 0; cellIdx < cells.Length; cellIdx++)
{
TreeSystemStructuredTrees cell = cells[cellIdx];
// If we don't have any tree skip this cell
if (cell.m_Instances.Length <= 0)
{
continue;
}
// And also check if the bounds are visible
if (culling.IsVisible(cellIdx) == false)
{
continue;
}
// Get closest point to cell
Vector3 pt = cell.m_BoundsBox.ClosestPoint(m_CameraPosTemp);
x = pt.x - m_CameraPosTemp.x;
y = pt.y - m_CameraPosTemp.y;
z = pt.z - m_CameraPosTemp.z;
float distToCell = x * x + y * y + z * z;
if (distToCell < treeDistSqr && GeometryUtility.TestPlanesAABB(m_PlanesTemp, cell.m_BoundsBox))
{
// TODO: the same process when we are going to have terrain sub-cells
ProcessTerrainCell(cell, ref treeDistSqr, ref shadowDistSqr);
// If it's visible
m_DataIssuedTerrainCells++;
}
// TODO: See for the case in which we are at the intersection of 4 cells and the cells are not visible to the frustum
// BUT they have trees that 'might' cast shadows inside the frustum. Do that with a special thing that only checks the trees
// for the shadow distance, and that's all
// else if (m_ApplyShadowPoppingCorrection && distToCell < shadowDistSqr) { }
}
}
void Start()
{
for (int i = 0; i < m_ManagedTerrains.Length; i++)
{
TreeSystemTerrain terrain = m_ManagedTerrains[i];
terrain.m_ManagedTerrain.drawTreesAndFoliage = false;
for (int j = 0; j < terrain.m_Cells.Length; j++)
{
// TODO: maybe allocate dinamically at runtime based on cell visibility to save memory
terrain.m_Cells[j].m_InstanceData = new TreeSystemLODInstance[terrain.m_Cells[j].m_Instances.Length];
// TODO: structure cell data
}
}
}
private void ProcessTerrain(TreeSystemTerrain terrain, ref float treeDistSqr)
{
TreeSystemStructuredTrees[] cells = terrain.m_Cells;
float x, y, z;
// TODO: calculate based on bounds index the cells that we'll iterate like the grass system
// We won't require to iterate all the cells but the neighbors of the current cell only
// Go bounds by bounds
for (int cellIdx = 0; cellIdx < cells.Length; cellIdx++)
{
TreeSystemStructuredTrees cell = cells[cellIdx];
// If we don't have any tree skip this cell
if (cell.m_Instances.Length <= 0)
{
continue;
}
// Get closest point to cell
Vector3 pt = cell.m_Bounds.ClosestPoint(m_CameraPosTemp);
x = pt.x - m_CameraPosTemp.x;
y = pt.y - m_CameraPosTemp.y;
z = pt.z - m_CameraPosTemp.z;
float distToCell = x * x + y * y + z * z;
if (distToCell < treeDistSqr && GeometryUtility.TestPlanesAABB(m_PlanesTemp, cell.m_Bounds))
{
// TODO: the same process when we are going to have terrain sub-cells
ProcessTerrainCell(cell, ref treeDistSqr);
// If it's visible
m_DataIssuedTerrainCells++;
}
}
}
void Start()
{
if (!m_UsedCamera)
{
m_UsedCamera = Camera.main;
}
for (int i = 0; i < m_ManagedTerrains.Length; i++)
{
TreeSystemTerrain terrain = m_ManagedTerrains[i];
terrain.m_ManagedTerrain.drawTreesAndFoliage = false;
CullingGroup cullingGroup = new CullingGroup();
BoundingSphere[] bounds = new BoundingSphere[terrain.m_Cells.Length];
for (int j = 0; j < terrain.m_Cells.Length; j++)
{
// TODO: maybe allocate dinamically at runtime based on cell visibility to save memory
terrain.m_Cells[j].m_InstanceData = new TreeSystemLODInstance[terrain.m_Cells[j].m_Instances.Length];
// TODO: structure cell data
// Create the culling group data
bounds[j] = new BoundingSphere(terrain.m_Cells[j].m_BoundsSphere.m_CenterRadius);
}
cullingGroup.targetCamera = m_UsedCamera;
cullingGroup.SetBoundingSpheres(bounds);
cullingGroup.SetBoundingSphereCount(bounds.Length);
// Save the bounds just in case we might need them
terrain.m_CullingGroupSpheres = bounds;
terrain.m_CullingGroup = cullingGroup;
}
}
private void ProcessTerrain(TreeSystemTerrain terrain, ref float colliderDistSqr)
{
TreeSystemStructuredTrees[] cells = terrain.m_Cells;
float x, y, z;
for (int cellIdx = 0; cellIdx < cells.Length; cellIdx++)
{
TreeSystemStructuredTrees cell = cells[cellIdx];
// Get closest point to cell
Vector3 pt = cell.m_BoundsBox.ClosestPoint(m_CameraPosTemp);
x = pt.x - m_CameraPosTemp.x;
y = pt.y - m_CameraPosTemp.y;
z = pt.z - m_CameraPosTemp.z;
float distToCell = x * x + y * y + z * z;
if (distToCell < colliderDistSqr)
{
ProcessTerrainCell(cell, ref colliderDistSqr);
}
}
}
IEnumerator CollisionUpdate()
{
for (;;)
{
m_CameraPosTemp = m_WatchedTransform.position;
float x = m_CameraPosTemp.x - m_LastPosition.x;
float y = m_CameraPosTemp.y - m_LastPosition.y;
float z = m_CameraPosTemp.z - m_LastPosition.z;
float distWalked = x * x + y * y + z * z;
// If we didn't walked enough, return
if (distWalked > m_CollisionRefreshDistance * m_CollisionRefreshDistance)
{
// Update last position
m_LastPosition = m_CameraPosTemp;
// Reset counter
m_DataIssuedActiveColliders = 0;
// Reset all the cache's data
foreach (TreeCollisionCache cache in m_Cache.Values)
{
if (cache != null)
{
cache.Reset();
}
}
// Refresh eveything
float collDistSqr = m_CollisionDistance * m_CollisionDistance;
for (int i = 0; i < m_OwnerSystem.m_ManagedTerrains.Length; i++)
{
TreeSystemTerrain terrain = m_OwnerSystem.m_ManagedTerrains[i];
// Get closest point
Vector3 pt = terrain.m_ManagedTerrainBounds.ClosestPoint(m_CameraPosTemp);
// Check if terrain is within reach range
x = pt.x - m_CameraPosTemp.x;
y = pt.y - m_CameraPosTemp.y;
z = pt.z - m_CameraPosTemp.z;
float distToTerrain = x * x + y * y + z * z;
// Enable/disable culling group execution based on terrain distance, since we don't want all of them running around
if (distToTerrain < collDistSqr)
{
ProcessTerrain(terrain, ref collDistSqr);
}
}
// Update the stats for active/cached colliders
m_OwnerSystem.m_DataIssuedActiveColliders = m_DataIssuedActiveColliders;
}
yield return(new WaitForSeconds(WAIT_TIME));
}
}
private void ProcessTerrain(TreeSystemTerrain terrain, ref float treeDistSqr, ref float shadowDistSqr)
{
// Get only the visible cells around the player
int cellsCount = terrain.m_CellCount;
Vector3 terrainLocal = terrain.m_ManagedTerrainWorldToLocal.MultiplyPoint3x4(m_CameraPosTemp);
Vector3 terrSize = terrain.m_ManagedTerrainSizes;
RowCol gridPos;
GetTerrainGridIndex(out gridPos, terrainLocal, cellsCount, terrSize);
// Get neighbors
GetNeightbors(m_TempNeighbors, gridPos.m_Row, gridPos.m_Col, terrain.m_CellsStructured, ref cellsCount);
if (m_TempNeighbors.Count <= 0)
{
return;
}
CullingGroup culling = terrain.m_CullingGroup;
bool useOcclusion = m_Settings.m_UseOcclusion;
// float x, y, z;
// TODO: calculate based on bounds index the cells that we'll iterate like the grass system
// We won't require to iterate all the cells but the neighbors of the current cell only
// TODO: only get the data from the culling group API at the moment
// Go bounds by bounds
for (int cellIdx = 0; cellIdx < m_TempNeighbors.Count; cellIdx++)
{
TreeSystemStructuredTrees cell = m_TempNeighbors[cellIdx];
// If we don't have any tree skip this cell
if (cell.m_Instances.Length <= 0)
{
continue;
}
// And also check if the bounds are visible
if (useOcclusion && culling.IsVisible(cellIdx) == false)
{
continue;
}
// Get closest point to cell
/*
* Vector3 pt = cell.m_BoundsBox.ClosestPoint(m_CameraPosTemp);
*
* x = pt.x - m_CameraPosTemp.x;
* y = pt.y - m_CameraPosTemp.y;
* z = pt.z - m_CameraPosTemp.z;
*
* float distToCell = x * x + y * y + z * z;
*/
float distToCell = cell.m_BoundsBox.SqrDistance(m_CameraPosTemp);
if (distToCell < treeDistSqr && GeometryUtility.TestPlanesAABB(m_PlanesTemp, cell.m_BoundsBox))
{
// TODO: the same process when we are going to have terrain sub-cells
ProcessTerrainCell(cell, ref treeDistSqr, ref shadowDistSqr);
// If it's visible
m_DataIssuedTerrainCells++;
}
// TODO: See for the case in which we are at the intersection of 4 cells and the cells are not visible to the frustum
// BUT they have trees that 'might' cast shadows inside the frustum. Do that with a special thing that only checks the trees
// for the shadow distance, and that's all
// else if (m_ApplyShadowPoppingCorrection && distToCell < shadowDistSqr) { }
}
}
void Update()
{
m_DataIssuedMeshTrees = 0;
m_DataIssuedShadows = 0;
m_DataIssuedTerrainCells = 0;
m_DataIssuedTerrainCellsFull = 0;
m_DataIssuedTerrains = 0;
m_DataIssuesDrawCalls = 0;
Camera camera = m_Settings.m_UsedCamera ? m_Settings.m_UsedCamera : Camera.main;
// Calculate planes and camera position
ExtractPlanes(m_PlanesTemp, camera.projectionMatrix * camera.worldToCameraMatrix);
m_CameraPosTemp = camera.transform.position;
// Update the wind block data
for (int proto = 0; proto < m_ManagedPrototypes.Length; proto++)
{
TreeSystemLODData[] lod = m_ManagedPrototypes[proto].m_LODData;
for (int i = 0; i < lod.Length; i++)
{
lod[i].CopyBlock();
}
}
float treeDistSqr = m_Settings.m_MaxTreeDistance * m_Settings.m_MaxTreeDistance;
float shadowDistSqr = m_Settings.m_ShadowDrawDistance * m_Settings.m_ShadowDrawDistance;
for (int i = 0; i < m_ManagedTerrains.Length; i++)
{
TreeSystemTerrain terrain = m_ManagedTerrains[i];
// Get closest point
/*
* Vector3 pt = terrain.m_ManagedTerrainBounds.ClosestPoint(m_CameraPosTemp);
*
* // Check if terrain is within reach range
* x = pt.x - m_CameraPosTemp.x;
* y = pt.y - m_CameraPosTemp.y;
* z = pt.z - m_CameraPosTemp.z;
*
* float distToTerrain = x * x + y * y + z * z;
*/
float distToTerrain = terrain.m_ManagedTerrainBounds.SqrDistance(m_CameraPosTemp);
// Enable/disable culling group execution based on terrain distance, since we don't want all of them running around
if (distToTerrain < treeDistSqr)
{
if (terrain.m_CullingGroup.enabled == false)
{
terrain.m_CullingGroup.enabled = true;
}
// If the terrain is within tree range
ProcessTerrain(terrain, ref treeDistSqr, ref shadowDistSqr);
m_DataIssuedTerrains++;
}
else
{
if (terrain.m_CullingGroup.enabled)
{
terrain.m_CullingGroup.enabled = false;
}
}
}
#if UNITY_EDITOR
#endif
}
private TreeSystemTerrain ProcessTerrain(Terrain terrain, int cellSize, GameObject cellHolder)
{
TreeSystemTerrain systemTerrain = new TreeSystemTerrain();
// Set system terrain data
systemTerrain.m_ManagedTerrain = terrain;
systemTerrain.m_ManagedTerrainBounds = terrain.GetComponent <TerrainCollider>().bounds;
systemTerrain.m_CellCount = TerrainUtils.GetCellCount(terrain, cellSize);
systemTerrain.m_CellSize = cellSize;
int cellCount;
BoxCollider[,] collidersBox;
SphereCollider[,] collidersSphere;
// Gridify terrain
TerrainUtils.Gridify(terrain, cellSize, out cellCount, out collidersBox, out collidersSphere, cellHolder, null);
// Temporary structured data
TreeSystemStructuredTrees[,] str = new TreeSystemStructuredTrees[cellCount, cellCount];
List <TreeSystemStoredInstance>[,] strInst = new List <TreeSystemStoredInstance> [cellCount, cellCount];
List <TreeSystemStructuredTrees> list = new List <TreeSystemStructuredTrees>();
// Insantiate the required data
for (int r = 0; r < cellCount; r++)
{
for (int c = 0; c < cellCount; c++)
{
TreeSystemStructuredTrees s = new TreeSystemStructuredTrees();
// Set the bounds, all in world space
s.m_BoundsBox = collidersBox[r, c].bounds;
s.m_BoundsSphere = new TreeSystemBoundingSphere(s.m_BoundsBox.center, collidersSphere[r, c].radius);
// Set it's new position
s.m_Position = new RowCol(r, c);
str[r, c] = s;
strInst[r, c] = new List <TreeSystemStoredInstance>();
list.Add(s);
}
}
TreeInstance[] terrainTreeInstances = terrain.terrainData.treeInstances;
TreePrototype[] terrainTreeProto = terrain.terrainData.treePrototypes;
Vector3 sizes = terrain.terrainData.size;
for (int i = 0; i < terrainTreeInstances.Length; i++)
{
GameObject proto = terrainTreeProto[terrainTreeInstances[i].prototypeIndex].prefab;
if (ShouldUsePrefab(proto) < 0)
{
continue;
}
// Get bounds for that mesh
Bounds b = proto.transform.Find(proto.name + "_LOD0").gameObject.GetComponent <MeshFilter>().sharedMesh.bounds;
// Calculate this from normalized terrain space to terrain's local space so that our row/col info are correct.
// Do the same when testing for cell row/col in which the player is, transform to terrain local space
Vector3 pos = TerrainUtils.TerrainToTerrainPos(terrainTreeInstances[i].position, terrain);
int row = Mathf.Clamp(Mathf.FloorToInt(pos.x / sizes.x * cellCount), 0, cellCount - 1);
int col = Mathf.Clamp(Mathf.FloorToInt(pos.z / sizes.z * cellCount), 0, cellCount - 1);
pos = TerrainUtils.TerrainToWorldPos(terrainTreeInstances[i].position, terrain);
Vector3 scale = new Vector3(terrainTreeInstances[i].widthScale, terrainTreeInstances[i].heightScale, terrainTreeInstances[i].widthScale);
float rot = terrainTreeInstances[i].rotation;
int hash = TUtils.GetStableHashCode(proto.name);
Matrix4x4 mtx = Matrix4x4.TRS(pos, Quaternion.Euler(0, rot * Mathf.Rad2Deg, 0), scale);
TreeSystemStoredInstance inst = new TreeSystemStoredInstance();
inst.m_TreeHash = hash;
inst.m_PositionMtx = mtx;
inst.m_WorldPosition = pos;
inst.m_WorldScale = scale;
inst.m_WorldRotation = rot;
inst.m_WorldBounds = TUtils.LocalToWorld(ref b, ref mtx);
strInst[row, col].Add(inst);
}
// Generate the mesh that contain all the billboards
for (int r = 0; r < cellCount; r++)
{
for (int c = 0; c < cellCount; c++)
{
if (strInst[r, c].Count <= 0)
{
continue;
}
// Sort based on the tree hash so that we don't have to do many dictionary look-ups
strInst[r, c].Sort((x, y) => x.m_TreeHash.CompareTo(y.m_TreeHash));
// Set the new instances
str[r, c].m_Instances = strInst[r, c].ToArray();
// Build the meshes for each cell based on tree type
List <TreeSystemStoredInstance> singleType = new List <TreeSystemStoredInstance>();
int lastHash = strInst[r, c][0].m_TreeHash;
foreach (TreeSystemStoredInstance inst in strInst[r, c])
{
// If we have a new hash, consume all the existing instances
if (inst.m_TreeHash != lastHash)
{
TreeSystemPrototypeData data = GetPrototypeWithHash(lastHash);
BuildTreeTypeCellMesh(cellHolder, str[r, c], singleType, data);
singleType.Clear();
// Update the hash
lastHash = inst.m_TreeHash;
}
// Add them to a list and when the hash changes begin the next generation
singleType.Add(inst);
}
if (singleType.Count > 0)
{
TreeSystemPrototypeData data = GetPrototypeWithHash(singleType[0].m_TreeHash);
BuildTreeTypeCellMesh(cellHolder, str[r, c], singleType, data);
singleType.Clear();
}
}
}
// Set the cells that contain the trees to the system terrain
systemTerrain.m_Cells = list.ToArray();
// Return it
return(systemTerrain);
}
// TODO: see from the list which trees fit in here
private TreeSystemTerrain ProcessTerrain(Terrain terrain, int cellSize, GameObject cellHolder, List <GameObject> extraTrees)
{
TreeSystemTerrain systemTerrain = new TreeSystemTerrain();
// Set system terrain data
systemTerrain.m_ManagedTerrain = terrain;
systemTerrain.m_ManagedTerrainBounds = terrain.GetComponent <TerrainCollider>().bounds;
systemTerrain.m_ManagedTerrainLocalToWorld = terrain.transform.localToWorldMatrix;
systemTerrain.m_ManagedTerrainWorldToLocal = terrain.transform.worldToLocalMatrix;
systemTerrain.m_ManagedTerrainSizes = terrain.terrainData.size;
systemTerrain.m_CellCount = TerrainUtils.GetCellCount(terrain, cellSize);
systemTerrain.m_CellSize = cellSize;
int cellCount;
BoxCollider[,] collidersBox;
SphereCollider[,] collidersSphere;
// Gridify terrain
TerrainUtils.Gridify(terrain, cellSize, out cellCount, out collidersBox, out collidersSphere, cellHolder, null);
// Temporary structured data
TreeSystemStructuredTrees[,] str = new TreeSystemStructuredTrees[cellCount, cellCount];
List <TreeSystemStoredInstance>[,] strInst = new List <TreeSystemStoredInstance> [cellCount, cellCount];
List <TreeSystemStructuredTrees> list = new List <TreeSystemStructuredTrees>();
// Insantiate the required data
for (int r = 0; r < cellCount; r++)
{
for (int c = 0; c < cellCount; c++)
{
TreeSystemStructuredTrees s = new TreeSystemStructuredTrees();
// Set the bounds, all in world space
s.m_BoundsBox = collidersBox[r, c].bounds;
s.m_BoundsSphere = new TreeSystemBoundingSphere(s.m_BoundsBox.center, collidersSphere[r, c].radius);
// Set it's new position
s.m_Position = new RowCol(r, c);
str[r, c] = s;
strInst[r, c] = new List <TreeSystemStoredInstance>();
list.Add(s);
}
}
// Delete cells since they might cause physics problems
if (m_DeleteCellsAfterGridify)
{
for (int i = 0; i < cellCount; i++)
{
for (int j = 0; j < cellCount; j++)
{
DestroyImmediate(collidersBox[i, j].gameObject);
}
}
}
int treeInstancesCount = 0, treeExtraCount = 0;
TreeInstance[] terrainTreeInstances = terrain.terrainData.treeInstances;
TreePrototype[] terrainTreeProto = terrain.terrainData.treePrototypes;
Vector3 sizes = terrain.terrainData.size;
for (int i = 0; i < terrainTreeInstances.Length; i++)
{
GameObject proto = terrainTreeProto[terrainTreeInstances[i].prototypeIndex].prefab;
if (ShouldUsePrefab(proto) < 0)
{
continue;
}
treeInstancesCount++;
// Get bounds for that mesh
Bounds b = proto.transform.Find(proto.name + "_LOD0").gameObject.GetComponent <MeshFilter>().sharedMesh.bounds;
// Calculate this from normalized terrain space to terrain's local space so that our row/col info are correct.
// Do the same when testing for cell row/col in which the player is, transform to terrain local space
Vector3 pos = TerrainUtils.TerrainToTerrainPos(terrainTreeInstances[i].position, terrain);
int row = Mathf.Clamp(Mathf.FloorToInt(pos.x / sizes.x * cellCount), 0, cellCount - 1);
int col = Mathf.Clamp(Mathf.FloorToInt(pos.z / sizes.z * cellCount), 0, cellCount - 1);
pos = TerrainUtils.TerrainToWorldPos(terrainTreeInstances[i].position, terrain);
Vector3 scale = new Vector3(terrainTreeInstances[i].widthScale, terrainTreeInstances[i].heightScale, terrainTreeInstances[i].widthScale);
float rot = terrainTreeInstances[i].rotation;
int hash = TUtils.GetStableHashCode(proto.name);
Matrix4x4 mtx = Matrix4x4.TRS(pos, Quaternion.Euler(0, rot * Mathf.Rad2Deg, 0), scale);
TreeSystemStoredInstance inst = new TreeSystemStoredInstance();
inst.m_TreeHash = hash;
inst.m_PositionMtx = mtx;
inst.m_WorldPosition = pos;
inst.m_WorldScale = scale;
inst.m_WorldRotation = rot;
inst.m_WorldBounds = TUtils.LocalToWorld(ref b, ref mtx);
strInst[row, col].Add(inst);
}
List <GameObject> containedTrees = new List <GameObject>();
// Change if we're going to use something diff than 50 for max extent
Bounds terrainExtendedBounds = systemTerrain.m_ManagedTerrainBounds;
terrainExtendedBounds.Expand(new Vector3(0, 50, 0));
// Same as a instance with minor diferences
for (int i = 0; i < extraTrees.Count; i++)
{
GameObject treeInstance = extraTrees[i];
// If the terrain contains the stuff
if (terrainExtendedBounds.Contains(treeInstance.transform.position) == false)
{
continue;
}
treeExtraCount++;
// Add the tree to the list of trees for removal
containedTrees.Add(treeInstance);
// Owner
GameObject proto = GetPrefabOwner(treeInstance);
// Get bounds for that mesh
Bounds b = proto.transform.Find(proto.name + "_LOD0").gameObject.GetComponent <MeshFilter>().sharedMesh.bounds;
// Calculate this from normalized terrain space to terrain's local space so that our row/col info are correct.
// Do the same when testing for cell row/col in which the player is, transform to terrain local space
Vector3 pos = TerrainUtils.TerrainToTerrainPos(TerrainUtils.WorldPosToTerrain(treeInstance.transform.position, terrain), terrain);
int row = Mathf.Clamp(Mathf.FloorToInt(pos.x / sizes.x * cellCount), 0, cellCount - 1);
int col = Mathf.Clamp(Mathf.FloorToInt(pos.z / sizes.z * cellCount), 0, cellCount - 1);
pos = treeInstance.transform.position;
Vector3 scale = treeInstance.transform.localScale;
float rot = treeInstance.transform.rotation.eulerAngles.y * Mathf.Deg2Rad;
// Set the hash
int hash = TUtils.GetStableHashCode(proto.name);
// Set the mtx
Matrix4x4 mtx = Matrix4x4.TRS(pos, Quaternion.Euler(0, rot * Mathf.Rad2Deg, 0), scale);
TreeSystemStoredInstance inst = new TreeSystemStoredInstance();
inst.m_TreeHash = hash;
inst.m_PositionMtx = mtx;
inst.m_WorldPosition = pos;
inst.m_WorldScale = scale;
inst.m_WorldRotation = rot;
inst.m_WorldBounds = TUtils.LocalToWorld(ref b, ref mtx);
strInst[row, col].Add(inst);
}
// Remove the items from the extra trees
foreach (GameObject tree in containedTrees)
{
extraTrees.Remove(tree);
}
// Generate the mesh that contain all the billboards
for (int r = 0; r < cellCount; r++)
{
for (int c = 0; c < cellCount; c++)
{
if (strInst[r, c].Count <= 0)
{
continue;
}
// Sort based on the tree hash so that we don't have to do many dictionary look-ups
strInst[r, c].Sort((x, y) => x.m_TreeHash.CompareTo(y.m_TreeHash));
// Set the new instances
str[r, c].m_Instances = strInst[r, c].ToArray();
// Build the meshes for each cell based on tree type
List <TreeSystemStoredInstance> singleType = new List <TreeSystemStoredInstance>();
int lastHash = strInst[r, c][0].m_TreeHash;
foreach (TreeSystemStoredInstance inst in strInst[r, c])
{
// If we have a new hash, consume all the existing instances
if (inst.m_TreeHash != lastHash)
{
TreeSystemPrototypeData data = GetPrototypeWithHash(lastHash);
if (ShouldBuildBillboardBatch(data.m_TreePrototype))
{
BuildTreeTypeCellMesh(cellHolder, str[r, c], singleType, data);
}
singleType.Clear();
// Update the hash
lastHash = inst.m_TreeHash;
}
// Add them to a list and when the hash changes begin the next generation
singleType.Add(inst);
}
if (singleType.Count > 0)
{
TreeSystemPrototypeData data = GetPrototypeWithHash(singleType[0].m_TreeHash);
if (ShouldBuildBillboardBatch(data.m_TreePrototype))
{
BuildTreeTypeCellMesh(cellHolder, str[r, c], singleType, data);
}
singleType.Clear();
}
}
}
// Set the cells that contain the trees to the system terrain
systemTerrain.m_Cells = list.ToArray();
// Print extraction data
Debug.Log("Extracted for terrain: " + terrain.name + " instance trees: " + treeInstancesCount + " extra trees: " + treeExtraCount);
// Return it
return(systemTerrain);
}
