/// <summary>
/// Default constructor which also registers the fields required by this updater
/// </summary>
public UpdaterRotationOverTime()
{
RequiredFields.Add(ParticleFields.Angle);
var curve = new ComputeAnimationCurveFloat();
SamplerMain.Curve = curve;
}
/// <summary>
/// Default constructor which also registers the fields required by this updater
/// </summary>
public UpdaterSizeOverTime()
{
RequiredFields.Add(ParticleFields.Size);
var curve = new ComputeAnimationCurveFloat();
SamplerMain.Curve = curve;
}
public override Task <Entity> CreateEntity(EntityHierarchyItemViewModel parent)
{
var name = ComputeNewName(parent, "Ribbon particle system");
var component = new ParticleSystemComponent();
var emitter = new ParticleEmitter {
ParticleLifetime = new Vector2(2, 2)
};
// 30 Particles per second
var spawner = new SpawnerPerSecond {
SpawnCount = 30
};
emitter.Spawners.Add(spawner);
// Ribbon
var ribbonShape = new ShapeBuilderRibbon
{
SmoothingPolicy = SmoothingPolicy.Best,
Segments = 15,
TextureCoordinatePolicy = TextureCoordinatePolicy.Stretched,
TexCoordsFactor = 1f
};
emitter.ShapeBuilder = ribbonShape;
// Velocity
var randVel = new InitialVelocitySeed
{
VelocityMin = new Vector3(-0.15f, 3f, -0.15f),
VelocityMax = new Vector3(0.15f, 3, 0.15f)
};
emitter.Initializers.Add(randVel);
// Spawn Order
var initialOrder = new InitialSpawnOrder();
emitter.Initializers.Add(initialOrder);
// Size by Lifetime
var sizeCurve = new ComputeAnimationCurveFloat();
var key0 = new AnimationKeyFrame <float>
{
Key = 0,
Value = 0.1f
};
var key1 = new AnimationKeyFrame <float>
{
Key = 0.9f,
Value = 0f
};
sizeCurve.KeyFrames.Add(key0);
sizeCurve.KeyFrames.Add(key1);
var sizeAnimation = new UpdaterSizeOverTime {
SamplerMain = { Curve = sizeCurve }
};
emitter.Updaters.Add(sizeAnimation);
emitter.SortingPolicy = EmitterSortingPolicy.ByOrder;
component.ParticleSystem.Emitters.Add(emitter);
return(CreateEntityWithComponent(name, component));
}
