public void UpdateLists()
{
// handle removals
if (_entitiesToRemove.Count > 0)
{
Utils.Swap(ref _entitiesToRemove, ref _tempEntityList);
foreach (var entity in _tempEntityList)
{
// handle the tagList
RemoveFromTagList(entity);
// handle the regular entity list
_entities.Remove(entity);
entity.OnRemovedFromScene();
entity.Scene = null;
if (Core.entitySystemsEnabled)
{
Scene.EntityProcessors.OnEntityRemoved(entity);
}
}
_tempEntityList.Clear();
}
// handle additions
if (_entitiesToAdd.Count > 0)
{
Utils.Swap(ref _entitiesToAdd, ref _tempEntityList);
foreach (var entity in _tempEntityList)
{
_entities.Add(entity);
entity.Scene = Scene;
// handle the tagList
AddToTagList(entity);
if (Core.entitySystemsEnabled)
{
Scene.EntityProcessors.OnEntityAdded(entity);
}
}
// now that all entities are added to the scene, we loop through again and call onAddedToScene
foreach (var entity in _tempEntityList)
{
entity.OnAddedToScene();
}
_tempEntityList.Clear();
_isEntityListUnsorted = true;
}
if (_isEntityListUnsorted)
{
_entities.Sort();
_isEntityListUnsorted = false;
}
// sort our tagList if needed
if (_unsortedTags.Count > 0)
{
foreach (var tag in _unsortedTags)
{
_entityDict[tag].Sort();
}
_unsortedTags.Clear();
}
}
void CalculateVertices()
{
if (!_areVertsDirty || _points.Length < 2)
{
return;
}
_areVertsDirty = false;
_indices.Reset();
_vertices.Reset();
var maxX = float.MinValue;
var minX = float.MaxValue;
var maxY = float.MinValue;
var minY = float.MaxValue;
if (_useStartEndWidths)
{
_maxWidth = System.Math.Max(_startWidth, _endWidth);
}
// calculate line length first and simulataneously get our min/max points for the bounds
var lineLength = 0f;
var halfMaxWidth = _maxWidth * 0.5f;
_points.Buffer[0].LengthFromPreviousPoint = 0;
for (var i = 0; i < _points.Length - 1; i++)
{
var distance = Vector2.Distance(_points.Buffer[i].Position, _points.Buffer[i + 1].Position);
_points.Buffer[i + 1].LengthFromPreviousPoint = distance;
lineLength += distance;
maxX = Mathf.MaxOf(maxX, _points.Buffer[i].Position.X + halfMaxWidth,
_points.Buffer[i + 1].Position.X + halfMaxWidth);
minX = Mathf.MinOf(minX, _points.Buffer[i].Position.X - halfMaxWidth,
_points.Buffer[i + 1].Position.X - halfMaxWidth);
maxY = Mathf.MaxOf(maxY, _points.Buffer[i].Position.Y + halfMaxWidth,
_points.Buffer[i + 1].Position.Y + halfMaxWidth);
minY = Mathf.MinOf(minY, _points.Buffer[i].Position.Y - halfMaxWidth,
_points.Buffer[i + 1].Position.Y - halfMaxWidth);
}
_bounds.X = minX;
_bounds.Y = minY;
_bounds.Width = maxX - minX;
_bounds.Height = maxY - minY;
// special case: single segment
if (_points.Length == 2)
{
if (_useStartEndWidths)
{
_points.Buffer[0].Width = _startWidth;
_points.Buffer[1].Width = _endWidth;
}
if (_useStartEndColors)
{
_points.Buffer[0].Color = _startColor;
_points.Buffer[1].Color = _endColor;
}
_firstSegment.SetPoints(ref _points.Buffer[0], ref _points.Buffer[1]);
AddSingleSegmentLine(ref _firstSegment, _points.Buffer[1].Color);
return;
}
var distanceSoFar = 0f;
var fusedPoint = Vector2.Zero;
var vertIndex = 0;
var thirdPoint = new SegmentPoint();
for (var i = 0; i < _points.Length - 1; i++)
{
var firstPoint = _points.Buffer[i];
var secondPoint = _points.Buffer[i + 1];
var hasThirdPoint = _points.Length > i + 2;
if (hasThirdPoint)
{
thirdPoint = _points.Buffer[i + 2];
}
// we need the distance along the line of both the first and second points. distanceSoFar will always be for the furthest point
// which is the previous point before adding the current segment distance.
var firstPointDistance = distanceSoFar;
distanceSoFar += secondPoint.LengthFromPreviousPoint;
var firstPointRatio = firstPointDistance / lineLength;
var secondPointRatio = distanceSoFar / lineLength;
var thirdPointRatio = 0f;
if (hasThirdPoint)
{
thirdPointRatio = (distanceSoFar + thirdPoint.LengthFromPreviousPoint) / lineLength;
}
if (_useStartEndColors)
{
ColorExt.Lerp(ref _startColor, ref _endColor, out firstPoint.Color, firstPointRatio);
ColorExt.Lerp(ref _startColor, ref _endColor, out secondPoint.Color, secondPointRatio);
if (hasThirdPoint)
{
ColorExt.Lerp(ref _startColor, ref _endColor, out thirdPoint.Color, thirdPointRatio);
}
}
if (_useStartEndWidths)
{
firstPoint.Width = Mathf.Lerp(_startWidth, _endWidth, firstPointRatio);
secondPoint.Width = Mathf.Lerp(_startWidth, _endWidth, secondPointRatio);
if (hasThirdPoint)
{
thirdPoint.Width = Mathf.Lerp(_startWidth, _endWidth, thirdPointRatio);
}
}
if (i == 0)
{
_firstSegment.SetPoints(ref firstPoint, ref secondPoint);
_secondSegment.SetPoints(ref secondPoint, ref thirdPoint);
}
else
{
Utils.Swap(ref _firstSegment, ref _secondSegment);
if (hasThirdPoint)
{
_secondSegment.SetPoints(ref secondPoint, ref thirdPoint);
}
}
// dont recalculate the fusedPoint for the last segment since there will be no third point to work with
if (hasThirdPoint)
{
var shouldFuseBottom =
Vector2Ext.IsTriangleCCW(firstPoint.Position, secondPoint.Position, thirdPoint.Position);
_secondSegment.SetFusedData(shouldFuseBottom, ref _firstSegment);
}
// special care needs to be take with the first segment since it has a different vert count
if (i == 0)
{
AddFirstSegment(ref _firstSegment, ref _secondSegment, ref vertIndex);
}
else
{
AddSegment(ref _firstSegment, ref vertIndex);
}
_lastSegment.CloneFrom(ref _firstSegment);
}
}