public Hull(List <Vector3> points)
{
//Make a new convex hull
this.points = ConvexHull.Compute(points, true);
this.points = MathfEx.smoothPolygon(this.points);
}
public static CanvasGeometry ComputeHullGeometry(ICanvasResourceCreator resourceCreator, Win2DScene scene, Win2DRenderNode renderNode)
{
Guard.NotNull(scene, nameof(scene));
Guard.NotNull(renderNode, nameof(renderNode));
Guard.NotNull(resourceCreator, nameof(resourceCreator));
var node = renderNode.Node;
if (!node.HasChildren || node.IsCollapsed)
{
return(null);
}
IList <Rect2> childBounds =
node.AllChildren()
.Select(x => (Win2DRenderNode)scene.FindRenderNode(x)).Union(new[] { renderNode }).Where(x => x.IsVisible)
.Select(x => Rect2.Inflate(new Rect2(x.TargetLayoutPosition, x.RenderSize), new Vector2(Padding, Padding)))
.ToList();
if (childBounds.Count <= 0)
{
return(null);
}
var hull = ConvexHull.Compute(childBounds);
var points = RoundCorners(hull);
return(BuildGeometry(resourceCreator, points));
}
public Hull(List <Vector3> pointsA, List <Vector3> pointsB)
{
//Union the two together -- not the best approach but its 2am
List <Vector3> allPoints = pointsA.Union(pointsB).ToList();
//Compute the hull and save it
this.points = ConvexHull.Compute(allPoints, true);
this.points = MathfEx.smoothPolygon(this.points);
}
public void ComputeHull_FromRects_CorrectCornersCalculated()
{
Rect2 rect1 = new Rect2(00, 00, 50, 50);
Rect2 rect2 = new Rect2(50, 50, 20, 20);
IEnumerable <Rect2> rects = new[] { rect1, rect2 };
ConvexHull hull = ConvexHull.Compute(rects);
Assert.Equal(6, hull.Points.Count);
Assert.Equal(new[]
{
new Vector2(00, 00),
new Vector2(00, 50),
new Vector2(50, 70),
new Vector2(70, 70),
new Vector2(70, 50),
new Vector2(50, 00)
}, hull.Points.ToArray());
}
