// Highlight the node at index 'index' by setting a CI filter
private void HighlightContact(int index, PresentationViewController presentationViewController)
{
// Create a filter
var glowFilter = new SCGlowFilter();
glowFilter.Name = "aGlow";
glowFilter.SetDefaults();
// Retrieve the node to highlight
// Scale up and move to front a little
var contactNode = GroupNode.FindChildNode("contact" + index, true);
contactNode.Scale = new SCNVector3(1.2f, 1.2f, 1.2f);
contactNode.Position = new SCNVector3(contactNode.Position.X, contactNode.Position.Y, contactNode.Position.Z + 50);
// Compute the screenspace position of this node because the glow filter needs this info
var worldPosition = contactNode.ConvertPositionToNode(new SCNVector3(0, 0, 0), null);
var screenPosition = ((SCNView)presentationViewController.View).ProjectPoint(worldPosition);
var screenPositionInPixels = ((SCNView)presentationViewController.View).ConvertPointToBacking(new CGPoint(screenPosition.X, screenPosition.Y));
glowFilter.CenterX = screenPositionInPixels.X;
glowFilter.CenterY = screenPositionInPixels.Y;
glowFilter.InputRadius = new NSNumber(10);
// Set the filter
// TODO contactNode.Filters = new CIFilter[] { glowFilter };
// Animate the radius parameter of the glow filter
/* TODO CABasicAnimation animation = CABasicAnimation.FromKeyPath ("filters.aGlow.inputRadius");
* animation.To = new NSNumber (20);
* animation.From = new NSNumber (10);
* animation.AutoReverses = true;
* animation.RepeatCount = float.MaxValue;
* animation.Duration = 1.0f;
* animation.TimingFunction = CAMediaTimingFunction.FromName (CAMediaTimingFunction.EaseInEaseOut);
* contactNode.AddAnimation (animation, new NSString ("filterAnimation"));*/
}
