private void TryApply(IWriteableGrid <TCell> canvas, IGridBrushArgs args, TPaint paint)
{
var segment = new Segment(args.WorldPoint, _previousWorldPoint);
IEnumerable <int[]> indexIntersection = canvas.IndexIntersection(segment);
foreach (int[] indexes in indexIntersection)
{
int x = indexes[1];
int y = indexes[0];
for (int i = 0; i < _brushRange.Lengths[0]; i++)
{
for (int j = 0; j < _brushRange.Lengths[1]; j++)
{
Point gridPoint = new Point(x + _brushRange.StartingIndex[1] + j, y + _brushRange.StartingIndex[0] + i);
Vector2 worldPoint = canvas.ToWorldPoint(gridPoint);
var cellArgs = new GridBrushArgs(gridPoint, worldPoint);
if (paint.CanApply(canvas, cellArgs))
{
paint.Apply(canvas, cellArgs);
}
}
}
}
}
public override void StartApply(IWriteableGrid <TCell> canvas, IGridBrushArgs args, TPaint paint)
{
_previousGridPoint = args.GridPoint;
_previousWorldPoint = args.WorldPoint;
TryApply(canvas, args, paint);
}
public override void UpdateApply(IWriteableGrid <TCell> canvas, IGridBrushArgs args, TPaint paint)
{
if (_previousGridPoint != args.GridPoint)
{
TryApply(canvas, args, paint);
}
_previousGridPoint = args.GridPoint;
_previousWorldPoint = args.WorldPoint;
}
public override void EndApply(IWriteableGrid <TCell> canvas, IGridBrushArgs args, TPaint paint)
{
Rectangle rectangle = MathUtils.GetBoundingBox(args.GridPoint, _startPoint).ClampToRectangle(canvas.IndexesBounds());
for (int i = rectangle.Top; i <= rectangle.Bottom; i++)
{
for (int j = rectangle.Left; j <= rectangle.Right; j++)
{
var point = new Point(j, i);
paint.Apply(canvas, new GridBrushArgs(point, canvas.ToWorldPoint(point)));
}
}
}
public override bool CanEndApply(IWriteableGrid <TCell> canvas, IGridBrushArgs args, TPaint paint) => true;
public override void StartApply(IWriteableGrid <TCell> canvas, IGridBrushArgs args, TPaint paint)
{
_startPoint = args.GridPoint;
}
public override bool CanEndApply(IWriteableGrid <TCell> canvas, IGridBrushArgs args, TPaint paint)
{
return(paint.CanApply(canvas, args));
}
public override void EndApply(IWriteableGrid <TCell> canvas, IGridBrushArgs args, TPaint paint)
{
paint.Apply(canvas, args);
}
static public IWriteableGrid <TNewValue> Retype <TOldValue, TNewValue>(this IWriteableGrid <TOldValue> array, Func <TOldValue, TNewValue> getter, Action <TOldValue, TNewValue> setter)
{
return(new RetypedWriteableGrid <TOldValue, TNewValue>(array, getter, setter));
}
