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jelito/Packages/com.kybernetik.animancer/Runtime/Interfaces/ITransition.cs

108 lines
5.3 KiB
C#

// Animancer // https://kybernetik.com.au/animancer // Copyright 2018-2025 Kybernetik //
using UnityEngine;
namespace Animancer
{
/// <summary>An object which can create an <see cref="AnimancerState"/> and set its details.</summary>
/// <remarks>
/// Transitions are generally used as arguments for <see cref="AnimancerLayer.Play(ITransition)"/>.
/// <para></para>
/// <strong>Documentation:</strong>
/// <see href="https://kybernetik.com.au/animancer/docs/manual/transitions">
/// Transitions</see>
/// </remarks>
/// https://kybernetik.com.au/animancer/api/Animancer/ITransition
public interface ITransition :
IHasEvents,
IHasKey,
IPolymorphic
{
/************************************************************************************************************************/
// Core Members - The main features required for a transition to be usable.
/************************************************************************************************************************/
/// <summary>The amount of time this transition should take (in seconds).</summary>
float FadeDuration { get; }
/// <summary>
/// The <see cref="Animancer.FadeMode"/> which should be used when this transition is passed into
/// <see cref="AnimancerLayer.Play(ITransition)"/>.
/// </summary>
FadeMode FadeMode { get; }
/// <summary>Creates and returns a new <see cref="AnimancerState"/> defuned by this transition.</summary>
/// <remarks>
/// The first time a transition is used on an object, this method creates a state
/// which is registered in the internal dictionary using the <see cref="IHasKey.Key"/>
/// so that it can be reused later on.
/// <para></para>
/// Methods like <see cref="AnimancerLayer.Play(ITransition)"/> will also call <see cref="Apply"/>,
/// so if you call this method manually you may want to call that method as well.
/// Or you can just use <see cref="AnimancerUtilities.CreateStateAndApply"/>.
/// </remarks>
AnimancerState CreateState();
/// <summary>Applies the details of this transition to the `state`.</summary>
/// <remarks>This method is called by every <see cref="AnimancerLayer.Play(ITransition)"/>.</remarks>
void Apply(AnimancerState state);
/************************************************************************************************************************/
// Extra Members - Additional features for convenience.
/************************************************************************************************************************/
/// <summary>Can this transition create a valid <see cref="AnimancerState"/>?</summary>
/// <remarks>
/// Use <see cref="AnimancerUtilities.IsValid(ITransition)"/> to check for <c>null</c> as well.
/// </remarks>
bool IsValid { get; }
/// <summary>What will the value of <see cref="AnimancerState.IsLooping"/> be for the created state?</summary>
bool IsLooping { get; }
/// <summary>The <see cref="AnimancerState.NormalizedTime"/> to start the animation at.</summary>
/// <remarks><see cref="float.NaN"/> allows the animation to continue from its current time.</remarks>
float NormalizedStartTime { get; set; }
/// <summary>The maximum expected value of the <see cref="AnimancerState.Length"/>.</summary>
/// <remarks>
/// In a <see cref="ClipState"/> this is equal to the <see cref="AnimationClip.length"/>
/// but the actual length can vary depending on the current parameters in states like
/// <see cref="LinearMixerState"/> and <see cref="ControllerState"/>.
/// </remarks>
float MaximumLength { get; }
/// <summary>The <see cref="AnimancerNodeBase.Speed"/> to play the animation at.</summary>
float Speed { get; set; }
/************************************************************************************************************************/
}
/// <summary>An <see cref="ITransition"/> which creates a specific type of <see cref="AnimancerState"/>.</summary>
/// <remarks>
/// <strong>Documentation:</strong>
/// <see href="https://kybernetik.com.au/animancer/docs/manual/transitions">
/// Transitions</see>
/// </remarks>
/// https://kybernetik.com.au/animancer/api/Animancer/ITransition_1
public interface ITransition<out TState> : ITransition
where TState : AnimancerState
{
/************************************************************************************************************************/
/// <summary>
/// The state that was created by this object. Specifically, this is the state that was most recently
/// passed into <see cref="ITransition.Apply"/> (usually by <see cref="AnimancerLayer.Play(ITransition)"/>).
/// </summary>
TState State { get; }
/************************************************************************************************************************/
/// <summary>Creates and returns a new <typeparamref name="TState"/>.</summary>
new TState CreateState();
/************************************************************************************************************************/
}
}