/// <summary>
/// Adds orientation to brush optionally with rotational symmetry.
/// </summary>
/// <param name="mask">Bit mask describing orientation.</param>
/// <param name="rotationalSymmetry">Indicates whether additional orientations should
/// be added which have rotational symmetry.</param>
/// <returns>
/// First <see cref="BrushOrientation"/> in group with rotational symmetry.
/// </returns>
/// <exception cref="System.Exception">
/// If orientation already exists.
/// </exception>
/// <seealso cref="BrushOrientation.AddVariation(Object)">BrushOrientation.AddVariation(Object)</seealso>
public BrushOrientation AddOrientation(int mask, bool rotationalSymmetry)
{
int[] masks = rotationalSymmetry
? OrientationUtility.GetMasksWithRotationalSymmetry(mask)
: new int[] { mask }
;
// Obviously, there is no rotational symmetry if there is only 1!
if (masks.Length == 1)
{
rotationalSymmetry = false;
}
// First, make sure that orientations do not alreay exist.
for (int i = 0; i < masks.Length; ++i)
{
if (this.FindOrientation(mask) != null)
{
throw new Exception("Orientation already exists.");
}
}
var newOrientations = new List <BrushOrientation>();
// Add orientation(s).
for (int i = 0; i < masks.Length; ++i)
{
var orientation = new BrushOrientation(masks[i]);
orientation.type = rotationalSymmetry;
orientation.rotation = i;
newOrientations.Add(orientation);
// Upgrade default orientation reference?
// Note: This is necessary when brush is first created.
if (masks[i] == this.defaultOrientationMask)
{
this.defaultOrientation = newOrientations[0];
}
}
// Add the new orientation(s).
int newIndex = this.orientations.Length;
Array.Resize(ref this.orientations, this.orientations.Length + newOrientations.Count);
for (int i = 0; i < newOrientations.Count; ++i)
{
this.orientations[newIndex + i] = newOrientations[i];
}
// Sort orientations by mask.
this.SortOrientationsByRotationalSymmetry();
this.RefreshOrientationLookupTable();
return(newOrientations[0]);
}
/// <summary>
/// Synchronize variations from another orientation.
/// </summary>
/// <remarks>
/// <para>Does nothing when attempting to synchronize variations from self.</para>
/// </remarks>
/// <param name="other">The other orientation.</param>
/// <seealso cref="OrientedBrush.SyncGroupedVariations(int)"/>
public void SyncVariationsFrom(BrushOrientation other)
{
if (other == this)
{
return;
}
this.variations = (Object[])other.variations.Clone();
this.variationWeights = (int[])other.VariationWeights.Clone();
}
/// <inheritdoc/>
public override void Awake()
{
base.Awake();
this.defaultOrientation = this.FindOrientation(this.DefaultOrientationMask);
}
