partial void slidersChanged(NSObject sender)
{
var gas = gasSlider.IntValue / 100.0f;
// Update the fire properties
fireEmitter.SetValueForKeyPath((NSNumber)(gas * 1000), (NSString)"emitterCells.fire.birthRate");
fireEmitter.SetValueForKeyPath((NSNumber)gas, (NSString)"emitterCells.fire.lifetime");
fireEmitter.SetValueForKeyPath((NSNumber)(gas * 0.35), (NSString)"emitterCells.fire.lifetimeRange");
fireEmitter.Size = new CGSize(50 * gas, 0);
var color = new CGColor(1, 1, 1, gas * 0.3f);
smokeEmitter.SetValueForKeyPath((NSNumber)(gas * 4), (NSString)"emitterCells.smoke.lifetime");
smokeEmitter.SetValueForKeyPath(color.Handle, (NSString)"emitterCells.smoke.color");
}
public ParticleEffect()
{
tapDetector = new UITapGestureRecognizer(() =>
{
var control = Control ?? Container;
var tapPoint = tapDetector.LocationInView(control);
var effect = (ParticlesSample.Effects.ParticleEffect)Element.Effects.FirstOrDefault(p => p is ParticlesSample.Effects.ParticleEffect);
var mode = effect?.Mode ?? ParticlesSample.Effects.EmitMode.OneShot;
var lifeTime = effect?.LifeTime ?? 1.5f;
var numberOfItems = effect?.NumberOfParticles ?? 4000;
var scale = effect?.Scale ?? 1.0f;
var speed = effect?.Speed * 1000 ?? 100.0f;
var image = effect?.Image ?? "Icon";
var emitterLayer = new CAEmitterLayer();
emitterLayer.Position = tapPoint;
emitterLayer.Shape = CAEmitterLayer.ShapeCircle;
var cell = new CAEmitterCell();
cell.Name = "pEmitter";
cell.BirthRate = numberOfItems;
cell.Scale = 0f;
cell.ScaleRange = scale;
cell.Velocity = speed;
cell.LifeTime = (float)lifeTime;
cell.EmissionRange = (nfloat)Math.PI * 2.0f;
cell.Contents = UIImage.FromBundle(image).CGImage;
emitterLayer.Cells = new CAEmitterCell[] { cell };
control.Layer.AddSublayer(emitterLayer);
if (mode == ParticlesSample.Effects.EmitMode.OneShot)
{
Task.Delay(1).ContinueWith(t => {
Device.BeginInvokeOnMainThread(() =>
{
emitterLayer.SetValueForKeyPath(NSNumber.FromInt32(0), new NSString("emitterCells.pEmitter.birthRate"));
});
});
}
});
}
