protected override void OnPostMoveUpdate(float deltaTime)
{
// Get screen size at the object depth
var cameraSize = Utils.GetScreenSizeInWorldCoords(CameraToUse, ProCamera2D.CameraDepthPos - Vector3D(_objStartPosition));
// Find indices
var cameraPos = _cameraToUseTransform.position;
var camBottomLeft = new Vector2(
Vector3H(cameraPos) - cameraSize.x / 2,
Vector3V(cameraPos) - cameraSize.y / 2);
var camOffset = new Vector2(
camBottomLeft.x - _objStartPosition.x - ObjectBottomLeft.x,
camBottomLeft.y - _objStartPosition.y - ObjectBottomLeft.y);
var startIndex = new IntPoint(
Mathf.FloorToInt(camOffset.x / ObjectSize.x),
Mathf.FloorToInt(camOffset.y / ObjectSize.y));
var copiesNeeded = new IntPoint(
Mathf.CeilToInt(cameraSize.x / ObjectSize.x),
Mathf.CeilToInt(cameraSize.y / ObjectSize.y));
var endIndex = new IntPoint(
startIndex.X + copiesNeeded.X,
startIndex.Y + copiesNeeded.Y);
// If the indices change
if (!startIndex.IsEqual(_prevStartIndex) || !endIndex.IsEqual(_prevEndIndex))
{
// Free out of range objects
FreeOutOfRangeObjects(startIndex, endIndex);
// Fill the grid
FillGrid(startIndex, endIndex);
}
_prevStartIndex = startIndex;
_prevEndIndex = endIndex;
}
public bool IsEqual(IntPoint other)
{
return other.X == X && other.Y == Y;
}
void FillGrid(IntPoint startIndex, IntPoint endIndex)
{
if (!_repeatHorizontal)
{
startIndex.X = 0;
endIndex.X = 0;
}
if (!_repeatVertical)
{
startIndex.Y = 0;
endIndex.Y = 0;
}
// Cycle horizontally
for (int i = startIndex.X; i <= endIndex.X; i++)
{
// Cycle vertically
for (int j = startIndex.Y; j <= endIndex.Y; j++)
{
// Place the copies on the provided range
var gridPos = new IntPoint(i, j);
var isIndexOccupied = false;
if (!_occupiedIndices.TryGetValue(gridPos, out isIndexOccupied))
{
// Create object copy if needed
if (_inactiveRepeatedObjects.Count == 0)
InitCopy(Instantiate(ObjectToRepeat) as Transform, false);
// Set index as occupied
_occupiedIndices[gridPos] = true;
// Retrieve item from inactive list
var repeatedObject = _inactiveRepeatedObjects.Dequeue();
// Position it on-screen
PositionObject(repeatedObject, gridPos);
}
}
}
}
void PositionObject(RepeatedObject obj, IntPoint index)
{
obj.GridPos = index;
obj.Transform.position = VectorHVD(
_objStartPosition.x + index.X * ObjectSize.x,
_objStartPosition.y + index.Y * ObjectSize.y,
_objStartPosition.z);
}
void FreeOutOfRangeObjects(IntPoint startIndex, IntPoint endIndex)
{
//Go through the objects list and make them inactive if possible
for (int i = 0; i < _allRepeatedObjects.Count; i++)
{
var repeatedObject = _allRepeatedObjects[i];
if ((repeatedObject.GridPos.X != int.MaxValue && (repeatedObject.GridPos.X < startIndex.X || repeatedObject.GridPos.X > endIndex.X)) ||
(repeatedObject.GridPos.Y != int.MaxValue && (repeatedObject.GridPos.Y < startIndex.Y || repeatedObject.GridPos.Y > endIndex.Y)))
{
// Set index as unoccupied
_occupiedIndices.Remove(repeatedObject.GridPos);
// Add item to inactive list
_inactiveRepeatedObjects.Enqueue(repeatedObject);
// Position it off-screen (it's faster then disabling it)
PositionObject(repeatedObject, IntPoint.MaxValue);
}
}
}