VertexAnimation/Samples~/Example1/Scripts/SampleAnimationSystemAuthoring.cs

using Unity.Entities;
using Unity.Mathematics;
using Unity.Collections;
using TAO.VertexAnimation;

public class SampleAnimationSystemAuthoring : UnityEngine.MonoBehaviour
{
	[UnityEngine.SerializeField]
	private SampleSystem sampleSystem = SampleSystem.PlayRandomAnimation;

	[UnityEngine.SerializeField]
	private VA_Animation animationAsset = null;

	private void Awake()
	{
		switch (sampleSystem)
		{
			case SampleSystem.PlayRandomAnimation:
				{
					var system = World.DefaultGameObjectInjectionWorld.GetExistingSystem<PlayRandomAnimationSystem>();
					system.Enabled = true;
				}
				break;
			case SampleSystem.PlayAnimationByAsset:
				{
					var system = World.DefaultGameObjectInjectionWorld.GetExistingSystem<PlayAnimationByNameSystem>();
					system.animationName = animationAsset.GetName();
					system.Enabled = true;
				}
				break;
			default:
				break;
		}
	}

	public enum SampleSystem
	{
		PlayRandomAnimation,
		PlayAnimationByAsset
	}
}

// Example system to update animation parameters.
[UpdateBefore(typeof(VA_AnimatorSystem))]
public class PlayRandomAnimationSystem : SystemBase
{
	protected override void OnCreate()
	{
		base.OnCreate();

		Enabled = false;
	}

	protected override void OnUpdate()
	{
		Random random = Random.CreateFromIndex((uint)UnityEngine.Time.time);
		float deltaTime = UnityEngine.Time.deltaTime;

		Entities.ForEach((ref VA_AnimatorComponent ac) =>
		{
			// Get the animation lib data.
			ref VA_AnimationLibraryData animationsRef = ref ac.animationLibrary.Value;

			// 'Play' the actual animation.
			ac.animationTime += deltaTime * animationsRef.animations[ac.animationIndex].frameTime;

			if (ac.animationTime > animationsRef.animations[ac.animationIndex].duration)
			{
				// Set time. Using the difference to smoothen out animations when looping.
				ac.animationTime -= animationsRef.animations[ac.animationIndex].duration;

				// New random animation.
				ac.animationIndex = random.NextInt(0, animationsRef.animations.Length);
			}
		}).ScheduleParallel();
	}
}

// Example system to set the animation by name.
[UpdateBefore(typeof(VA_AnimatorSystem))]
public class PlayAnimationByNameSystem : SystemBase
{
	public FixedString64 animationName;

	protected override void OnCreate()
	{
		base.OnCreate();

		Enabled = false;
	}

	protected override void OnUpdate()
	{
		float deltaTime = UnityEngine.Time.deltaTime;
		FixedString64 an = animationName;

		Entities.ForEach((Entity entity, ref VA_AnimatorComponent ac) =>
		{
			// Get the animation lib data.
			ref VA_AnimationLibraryData animationsRef = ref ac.animationLibrary.Value;

			// Set the animation index on the AnimatorComponent to play this animation.
			ac.animationIndex = VA_AnimationLibraryUtils.GetAnimation(ref animationsRef, an);

			// 'Play' the actual animation.
			ac.animationTime += deltaTime * animationsRef.animations[ac.animationIndex].frameTime;

			if (ac.animationTime > animationsRef.animations[ac.animationIndex].duration)
			{
				// Set time. Using the difference to smoothen out animations when looping.
				ac.animationTime -= animationsRef.animations[ac.animationIndex].duration;
			}
		}).ScheduleParallel();
	}
}