/// <summary>
/// Creates a pattern based on the given piece of the given input.
/// </summary>
/// <param name="inputMin">
/// The position of this pattern's min corner in the input.
/// </param>
/// <param name="size">
/// The size of this pattern along each axis (before transformation).
/// </param>
/// <param name="patternTransform">
/// Transforms this pattern's region in the input.
/// Note that using Rotate270CW or Rotate90CW results in the X and Y size swapping places.
/// </param>
public Pattern(Input input, Vector2i inputMin, Vector2i size, Transforms patternTransform)
{
Frequency = 1;
//Get the size of this pattern after transformation.
Vector2i transformedSize = size;
switch (patternTransform)
{
case Transforms.MirrorX:
case Transforms.MirrorY:
case Transforms.Rotate180:
case Transforms.None:
break;
case Transforms.Rotate270CW:
case Transforms.Rotate90CW:
transformedSize = new Vector2i(size.y, size.x);
break;
default: throw new NotImplementedException(patternTransform.ToString());
}
//Sample the pixel values from the input.
Values = new Color[transformedSize.x, transformedSize.y];
foreach (Vector2i patternPos in new Vector2i.Iterator(size))
{
Vector2i transformedPatternPos = patternPos.Transform(patternTransform, size);
Vector2i inputPos = inputMin + patternPos;
Values.Set(transformedPatternPos, input[inputPos]);
}
}
/// <summary>
/// Gets/sets a pixel in this input.
/// Automatically handles things like wrapping the position if this instance is periodic.
/// </summary>
public Color this[Vector2i pos]
{
get
{
Vector2i size = Size;
if (PeriodicX)
{
while (pos.x < 0)
{
pos.x += size.x;
}
pos.x %= size.x;
}
if (PeriodicY)
{
while (pos.y < 0)
{
pos.y += size.y;
}
pos.y %= size.y;
}
return(data.Get(pos));
}
set
{
Vector2i size = Size;
if (PeriodicX)
{
while (pos.x < 0)
{
pos.x += size.x;
}
pos.x %= size.x;
}
if (PeriodicY)
{
while (pos.y < 0)
{
pos.y += size.y;
}
pos.y %= size.y;
}
if (!IsInside(pos))
{
return;
}
data.Set(pos, value);
}
}
public Color this[Vector2i pos]
{
get { return(Values.Get(pos)); }
set { Values.Set(pos, value); }
}