代码创建动画状态机

using UnityEngine;
using System.Collections;
using UnityEditor;
using UnityEditor.Animations;

public class CreateAnimator : Editor
{
    [MenuItem("ModelConfig/创建Controller")]
    static void DoCreateAnimationAssets()
    {
        //创建Controller
        AnimatorController animatorController = AnimatorController.CreateAnimatorControllerAtPath("Assets/GeErZan1.controller");
        //得到它的Layer
        AnimatorControllerLayer layer = animatorController.layers[0];
        layer.stateMachine.anyStatePosition = new Vector3(250,-60,0);
        layer.stateMachine.entryPosition = new Vector3(25, -240, 0);
        AddParamter(animatorController, "Forward", AnimatorControllerParameterType.Float);
        AddParamter(animatorController, "StateI", AnimatorControllerParameterType.Int);
        AddParamter(animatorController, "MoveSpeed", AnimatorControllerParameterType.Float);
        AddParamter(animatorController, "DeadI", AnimatorControllerParameterType.Int);
        AddParamter(animatorController, "AttackI", AnimatorControllerParameterType.Int);
        AddParamter(animatorController, "SkillI", AnimatorControllerParameterType.Int);
        AddParamter(animatorController, "HurtI", AnimatorControllerParameterType.Int);
        AddParamter(animatorController, "ControlledI", AnimatorControllerParameterType.Int);
        //将动画保存到 AnimatorController中
        AddState<ComeNormalEnemy>("Come", layer, 1, new Vector3(0, -200, 0));
        AnimatorState back = AddState<BackNormalEnemy>("Back", layer, 3, new Vector3(0, -155, 0));
        back.speed = -1;
        AnimatorStateMachine controller = AddStateMachine<ControlledNormalEnemy>("Controlled", layer, new Vector3(0, -110, 0));
        AddSubState(controller, layer, "Controlled", 1, 4);
        AnimatorStateMachine dead = AddStateMachine<DeadNormalEnemy>("Dead", layer, new Vector3(0, -65, 0));
        AddSubState(dead,layer, "Dead", 3, 5);
        AnimatorStateMachine hurt = AddStateMachine<HurtNormalEnemy>("Hurt", layer, new Vector3(0, -20, 0));
        AddSubState(hurt, layer, "Hurt", 5, 6);
        AddState<JumpNormalEnemy>("Jump", layer, 7, new Vector3(0, 25, 0));
        AnimatorStateMachine attack = AddStateMachine<AttackNormalEnemy>("Attack", layer, new Vector3(0, 70, 0));
        AddSubState(attack, layer, "Attack", 3, 8);
        AnimatorStateMachine skill = AddStateMachine<SkillNormalEnemy>("Skill", layer, new Vector3(500, -200, 0));
        AddSubState(skill, layer, "Skill", 2, 9);
        AddState<WakeUpNormalEnemy>("WakeUp", layer, 10, new Vector3(500, -155, 0));
        AddState<DefenseNormalEnemy>("Defense", layer, 11, new Vector3(500, -110, 0));
        AddState<ProvokeNormalEnemy>("Provoke", layer, 12, new Vector3(500, -65, 0));
        AddState<AdsorptionNormalEnemy>("Adsorption", layer, 18, new Vector3(500, -20, 0));
        AddState<Idle>("Idle", layer, 23, new Vector3(500, 25, 0));
        BlendTree blendTree = null;
        animatorController.CreateBlendTreeInController("Move",out blendTree);
    }

    private static AnimatorState AddState<T>(string stateName, AnimatorControllerLayer layer, float threshold, Vector3 position) where T : StateMachineBehaviour
    {
        AnimatorStateMachine sm = layer.stateMachine;
        AnimatorState animatorState = sm.AddState(stateName, position);
        AnimatorStateTransition animatorStateTransition = sm.AddAnyStateTransition(animatorState);
        animatorStateTransition.canTransitionToSelf = false;
        animatorStateTransition.AddCondition(AnimatorConditionMode.Equals, threshold, "StateI");
        animatorState.AddStateMachineBehaviour<T>();
        return animatorState;
    }

    private static AnimatorStateMachine AddStateMachine<T>(string stateName, AnimatorControllerLayer layer, Vector3 position) where T : StateMachineBehaviour
    {
        AnimatorStateMachine sm = layer.stateMachine;
        AnimatorStateMachine sub = sm.AddStateMachine(stateName, position);
        sub.AddStateMachineBehaviour<T>();
        return sub;
    }

    private static void AddSubState(AnimatorStateMachine stateMachine, AnimatorControllerLayer layer, string nameStr, int length, float threshold)
    {
        Vector3[] positions = new Vector3[length];
        int startY = -100;
        for (int j = 0; j < length; ++j)
        {
            positions[j] = new Vector3(300, startY, 0);
            startY += 70;
        }
        for (int i = 0; i < length; ++i)
        {
            AnimatorState animatorState = stateMachine.AddState(nameStr + i.ToString(), positions[i]);
            AnimatorStateMachine sm = layer.stateMachine;
            AnimatorStateTransition animatorStateTransition = sm.AddAnyStateTransition(animatorState);
            animatorStateTransition.canTransitionToSelf = false;
            animatorStateTransition.AddCondition(AnimatorConditionMode.Equals, threshold, "StateI");
            animatorStateTransition.AddCondition(AnimatorConditionMode.Equals, i, nameStr + "I");
        }
    }

    private static void AddParamter(AnimatorController controller, string name, AnimatorControllerParameterType type)
    {
        controller.AddParameter(name, type);
    }
}