/// <summary>
/// Clear the nodes of the mask and set the provided ones.
/// </summary>
/// <param name="mask"></param>
/// <param name="nodes"></param>
private void SetMaskNodes(BiomeMaskArea mask, List <Vector3> nodes)
{
mask.ClearNodes();
foreach (Vector3 node in nodes)
{
mask.AddNodeToEnd(node);
}
mask.PositionNodes();
}
/// <summary>
/// Transform the mask and convert it into its convex hull.
/// </summary>
/// <param name="mask"></param>
public static void ConvexHull(BiomeMaskArea mask)
{
Vector3 maskPosition = mask.transform.position;
List <Vector2> positionsXY = mask.Nodes.ConvertAll <Vector2>(item => new Vector2(item.Position.x, item.Position.z));
List <Vector2> convexHull = PolygonUtility.GetConvexHull(positionsXY);
mask.Nodes.Clear();
foreach (Vector2 nodePosition in convexHull)
{
mask.AddNodeToEnd(new Vector3(maskPosition.x + nodePosition.x, 0, maskPosition.z + nodePosition.y));
}
// center main handle, implicitly updates the mask
CenterMainHandle(mask);
}
