void Init()
{
var cathetus = Mathf.Sqrt((_searchRadius * _searchRadius) / 2);
_searchBounds = new Vector3(cathetus, 0, cathetus);
_unit = GetComponent <RBTUnit>();
}
void FixedUpdate()
{
if (_unit.CommandGroupId != "" || !_unit.Alive)
{
return;
}
var nearbyUnits = RBTUnitBehaviourManager.UnitGrid.FindNear(_unit.Position, _searchBounds);
var sqrRadius = _searchRadius * _searchRadius;
RBTUnit closestUnit = null;
float closestDist = 0;
foreach (var unit in nearbyUnits)
{
var dist = (unit.Position - _unit.Position).sqrMagnitude;
if (dist < sqrRadius && unit.Team != _unit.Team && unit.Alive)
{
if (closestUnit == null || dist < closestDist)
{
closestDist = dist;
closestUnit = unit;
}
break;
}
}
if (closestUnit)
{
RBTUnitBehaviourManager.Instance.CommandAttack(new List <RBTUnit>()
{
_unit
}, closestUnit);
}
}
public void Add(RBTUnit unit)
{
if (_unitToCells.ContainsKey(unit))
{
return;
}
else
{
_unitToCells.Add(unit, new List <CellNode>());
}
var cellIndices = CalcOccupiedCells(unit);
foreach (var cellIndex in cellIndices)
{
var newHead = new CellNode()
{
unit = unit, cellIndex = cellIndex
};
if (_indexToCell.ContainsKey(cellIndex))
{
var prevHead = _indexToCell[cellIndex];
prevHead.previous = newHead;
newHead.next = prevHead;
}
_indexToCell[cellIndex] = newHead;
_unitToCells[unit].Add(newHead);
}
}
public void Remove(RBTUnit unit)
{
var cellNodes = _unitToCells[unit];
foreach (var node in cellNodes)
{
var previous = node.previous;
var next = node.next;
if (previous == null && next == null)
{
_indexToCell.Remove(node.cellIndex);
}
else
{
if (previous != null)
{
previous.next = next;
}
if (next != null)
{
next.previous = previous;
}
}
}
_unitToCells.Remove(unit);
}
public HashSet <RBTUnit> FindNear(RBTUnit unit)
{
var grid = RBTUnitBehaviourManager.UnitGrid;
var scale = GetLargestDimension(unit.Bounds.Extents);
var scaledSearchBounds = _baseSearchBounds * scale;
return(grid.FindNear(unit.Position, scaledSearchBounds));
}
public bool WithinFov(RBTUnit source, RBTUnit target)
{
var dirSourceToTarget = (target.Position - source.Position).normalized;
var sourceVelocityDir = source.Velocity.normalized;
var dotProd = Vector3.Dot(dirSourceToTarget, sourceVelocityDir);
return(dotProd > _minFovDotProd);
}
public List <RBTUnit> GetUnitsWithinFov(RBTUnit unit)
{
var nearby = FindNear(unit);
var nearbyWithinFov = new List <RBTUnit>();
nearbyWithinFov.Capacity = nearbyWithinFov.Count;
foreach (var nu in nearby)
{
if (WithinFov(unit, nu))
{
nearbyWithinFov.Add(nu);
}
}
return(nearbyWithinFov);
}
// Public
public float GetMaxDistance(RBTUnit unit)
{
var scale = GetLargestDimension(unit.Bounds.Extents);
return(Reach * scale);
}
public Vector3Int[] GetOccupiedCells(RBTUnit unit)
{
return(_unitToCells[unit].Select(node => node.cellIndex).ToArray());
}
List <Vector3Int> CalcOccupiedCells(RBTUnit unit)
{
var boundsCorners = unit.Bounds.Corners;
// var cellIndices = new HashSet<Vector3Int>();
var occupiedCells = new OccupiedCells();
for (int i = 0; i < 4; i++)
{
var startCorner = boundsCorners[i % 4];
var endCorner = boundsCorners[(i + 1) % 4];
var startCell = GetCellIndex(startCorner);
var endCell = GetCellIndex(endCorner);
occupiedCells.Add(startCell);
if (startCell == endCell)
{
continue;
}
occupiedCells.Add(endCell);
var rayDir = (endCorner - startCorner).normalized;
var step_dzdx = Mathf.Abs(rayDir.z / (rayDir.x + 0.0001f));
var step_dxdz = Mathf.Abs(rayDir.x / (rayDir.z + 0.0001f));
var rayStepX = Mathf.Sqrt(1 + Mathf.Pow(step_dzdx, 2));
var rayStepZ = Mathf.Sqrt(1 + Mathf.Pow(step_dxdz, 2));
int stepX, stepZ;
float initialAdjustmentX, initialAdjustmentZ;
if (rayDir.x < 0)
{
stepX = -1;
initialAdjustmentX = startCorner.x - startCell.x;
}
else
{
stepX = 1;
initialAdjustmentX = (startCell.x + 1) - startCorner.x;
}
if (rayDir.z < 0)
{
stepZ = -1;
initialAdjustmentZ = startCorner.z - startCell.z;
}
else
{
stepZ = 1;
initialAdjustmentZ = (startCell.z + 1) - startCorner.z;
}
step_dxdz *= stepX;
step_dzdx *= stepZ;
var rayLengthX = initialAdjustmentX * rayStepX;
var rayLengthZ = initialAdjustmentZ * rayStepZ;
float zAlongX = startCorner.z + step_dzdx * initialAdjustmentX;
float xAlongZ = startCorner.x + step_dxdz * initialAdjustmentZ;
var maxRayLength = (endCorner - startCorner).magnitude;
var currentCellX = GetCellIndex(new Vector3(startCorner.x + stepX * initialAdjustmentX, startCorner.y, zAlongX));
if (rayLengthX < maxRayLength)
{
occupiedCells.Add(currentCellX);
}
var currentCellZ = GetCellIndex(new Vector3(xAlongZ, startCorner.y, startCorner.z + stepZ * initialAdjustmentZ));
if (rayLengthZ < maxRayLength)
{
occupiedCells.Add(currentCellZ);
}
bool endCellReached = false;
while (!endCellReached)
{
bool commonAdjacentCell = currentCellZ.z - currentCellX.z == 1 && currentCellX.x - currentCellZ.x == 1;
if (commonAdjacentCell)
{
occupiedCells.Add(new Vector3Int(currentCellZ.x, startCell.y, currentCellX.z));
}
if (rayLengthX < rayLengthZ)
{
rayLengthX += rayStepX;
if (rayLengthX < maxRayLength)
{
zAlongX += step_dzdx;
currentCellX.x += stepX;
currentCellX.z = Mathf.FloorToInt(zAlongX);
occupiedCells.Add(currentCellX);
}
}
else
{
rayLengthZ += rayStepZ;
if (rayLengthZ < maxRayLength)
{
xAlongZ += step_dxdz;
currentCellZ.z += stepZ;
currentCellZ.x = Mathf.FloorToInt(xAlongZ);
occupiedCells.Add(currentCellZ);
}
}
endCellReached = rayLengthX >= maxRayLength && rayLengthZ >= maxRayLength;
}
}
foreach (var entry in occupiedCells.rowEdgeValues)
{
var valuePair = entry.Value;
var smallestX = valuePair.Item1;
var biggestX = valuePair.Item2;
var z = entry.Key;
var y = Mathf.FloorToInt(boundsCorners[0].y);
for (int x = smallestX + 1; x < biggestX; x++)
{
occupiedCells.Add(new Vector3Int(x, y, z));
}
}
int topCount = occupiedCells.Count;
var allCells = new List <Vector3Int>();
allCells.Capacity = topCount;
foreach (var row in occupiedCells.rowToCells.Values)
{
foreach (var cell in row)
{
allCells.Add(cell);
}
}
var diffY = GetCellIndex(boundsCorners[0]).y - GetCellIndex(boundsCorners[4]).y;
for (int y = 1; y <= diffY; y++)
{
for (int i = 0; i < topCount; i++)
{
allCells.Add(new Vector3Int(allCells[i].x, allCells[i].y - y, allCells[i].z));
}
}
return(allCells);
}
public void Update(RBTUnit unit)
{
Remove(unit);
Add(unit);
}
public UnitEvent(RBTUnit sender)
{
Sender = sender;
}
public OnStateChangedEvent(RBTUnit sender, UnitState prevState, UnitState newState)
: base(sender)
{
PrevState = prevState;
NewState = newState;
}
public OnDeActivatedEvent(RBTUnit sender)
: base(sender)
{
}
public OnDeselectedEvent(RBTUnit sender)
: base(sender)
{
}