[Unity基础]unity5中的动画系统(一)

相关链接：

http://www.unitymanual.com/thread-18449-1-1.html

http://docs.unity3d.com/ScriptReference/StateMachineBehaviour.html

常用API(需要继承StateMachineBehaviour)：

下面以一个攻击连招的例子讲解吧！在新的动画系统中，连线变得简单明了，每增加一个动画，就像下面一样连起来就是了。至于脚本的编写，只需点击图中的任意一个动画状态，然后在Inspector面板中点击Add Behaviour，即可为该动画状态编写脚本。这里我建了一个int变量控制整个状态机的状态变换，在右边的5个退出条件中，全部取消掉Has Exit Time(退出时间改为用脚本控制)。

代码如下：

using UnityEngine;
using System.Collections;

public class Idle : StateMachineBehaviour {

    override public void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
    {
        if (Input.GetKeyDown(KeyCode.H))
            animator.SetInteger("state", (int)CharacterState.Attack1);
        if ((Input.GetAxisRaw("Horizontal") != 0) || (Input.GetAxisRaw("Vertical") != 0))
            animator.SetInteger("state", (int)CharacterState.Run);
    }

}

using UnityEngine;
using System.Collections;

public class Attack1 : StateMachineBehaviour {

    override public void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
    {
        if (Input.GetKeyDown(KeyCode.H) && (stateInfo.normalizedTime > 0.5f))
            animator.SetInteger("state", (int)CharacterState.Attack2);
        if(stateInfo.normalizedTime > 0.9f)
            animator.SetInteger("state", (int)CharacterState.Idle);
    }

}

using UnityEngine;
using System.Collections;

public class Attack2 : StateMachineBehaviour {

    override public void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
    {
        if (Input.GetKeyDown(KeyCode.H) && (stateInfo.normalizedTime > 0.5f))
            animator.SetInteger("state", (int)CharacterState.Attack3);
        if (stateInfo.normalizedTime > 0.9f)
            animator.SetInteger("state", (int)CharacterState.Idle);
    }

}

using UnityEngine;
using System.Collections;

public class Attack3 : StateMachineBehaviour {

    override public void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
    {
        if (stateInfo.normalizedTime > 0.7f)
            animator.SetInteger("state", (int)CharacterState.Idle);
    }

}

using UnityEngine;
using System.Collections;

public class Run : StateMachineBehaviour {

    override public void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
    {
        if ((Input.GetAxisRaw("Horizontal") == 0) && (Input.GetAxisRaw("Vertical") == 0))
            animator.SetInteger("state", (int)CharacterState.Idle);
    }

}

效果图：

另外，可以用代码来创建AnimatorController，不过这种方法创建的AC，里面的动画状态排列得不是很美观，后期维护就蛋疼了，慎用啊。。

using UnityEngine;
using UnityEditor;
using UnityEditor.Animations;

public class CreateController : EditorWindow {

    [MenuItem("Window/CreateController")]
    static void Create()
    {
        // Creates the controller
        var controller = AnimatorController.CreateAnimatorControllerAtPath ("Assets/StateMachineTransitions.controller");
 
        // Add parameters
        controller.AddParameter("TransitionNow", AnimatorControllerParameterType.Trigger);
        controller.AddParameter("Reset", AnimatorControllerParameterType.Trigger);
        controller.AddParameter("GotoB1", AnimatorControllerParameterType.Trigger);
        controller.AddParameter("GotoC", AnimatorControllerParameterType.Trigger);
 
        // Add StateMachines
        var rootStateMachine = controller.layers[0].stateMachine;
        var stateMachineA = rootStateMachine.AddStateMachine("smA");
        var stateMachineB = rootStateMachine.AddStateMachine("smB");
        var stateMachineC = stateMachineB.AddStateMachine("smC");
 
        // Add States
        var stateA1 = stateMachineA.AddState("stateA1");
        var stateB1 = stateMachineB.AddState("stateB1");
        var stateB2 = stateMachineB.AddState("stateB2");
        stateMachineC.AddState("stateC1");
        var stateC2 = stateMachineC.AddState("stateC2"); // don’t add an entry transition, should entry to state by default
 
        // Add Transitions
        var exitTransition = stateA1.AddExitTransition();
        exitTransition.AddCondition(AnimatorConditionMode.If, 0, "TransitionNow");
        exitTransition.duration = 0;
 
        var resetTransition = stateMachineA.AddAnyStateTransition(stateA1);
        resetTransition.AddCondition(AnimatorConditionMode.If, 0, "Reset");
        resetTransition.duration = 0;
 
        var transitionB1 = stateMachineB.AddEntryTransition(stateB1);
        transitionB1.AddCondition(AnimatorConditionMode.If, 0, "GotoB1");
        stateMachineB.AddEntryTransition(stateB2);
        stateMachineC.defaultState = stateC2;
        var exitTransitionC2 = stateC2.AddExitTransition();
        exitTransitionC2.AddCondition(AnimatorConditionMode.If, 0, "TransitionNow");
        exitTransitionC2.duration = 0;
 
        var stateMachineTransition = rootStateMachine.AddStateMachineTransition(stateMachineA, stateMachineC);
        stateMachineTransition.AddCondition(AnimatorConditionMode.If, 0, "GotoC");
        rootStateMachine.AddStateMachineTransition(stateMachineA, stateMachineB);
    }  
}