提要
今天要实现的是一个简单人物控制器。
包括用w,a,s,d来控制人物上下左右跑动，鼠标左击发出连招，都是基于老的lagacy的动画。尽管unity3d自带有charactorcontroller，可是并非非常好用，所以人物控制相关的所有自己来实现。先上效果图：
场景搭建
首先下载这个package，里面包括了人物的动作还有地面的模型。
将人物和地面都拖进场景中。这里的模型默认的动画模式是lagacy，不用改动。模型有点偏小，改变模型的scale值为10.最好不要改源文件的scale的scale factor。可能会出现骨骼错位的问题。
接下来给摄像机加入一个天空盒组件，加入一个unity自带的天空盒就好。
对于人物还要加入几个component：
加入Rigdbody来控制人物，选择IsKinematic，这样角色就不会被外力影响。加了CapsuleCollider让角色 不掉下去。
HeroController用来控制角色的运动和打斗。以下会说。
角色行走
思路非常easy，通过wasd获得行走的方向，然后相应控制角色的位移就能够了，只是在变向的时候要注意角色的平滑转身。
首先定义 一个 枚举变量，为角色可能的状态。
public enum ActionState
{
Attack_1,
Attack_2,
Attack_3_1,
Attack_3_2,
Attack_3_3,
Attack_4,
Fire,
Jump,
Run,
Idle
}
private ActionState actionState = ActionState.Idle;Animate函数来依据角色的状态播放相应的动画
void Animate()
{
float delayTime = -0.1f;
switch (actionState) {
case ActionState.Attack_3_1:
delayTime = -0.1f;
playerAnimation.CrossFade("Attack3-1", 0.15f);
currentAnimationClip = playerAnimation["Attack3-1"].clip;
break;
case ActionState.Attack_3_2:
delayTime = -0.1f;
playerAnimation.CrossFade("Attack3-2", 0.15f);
currentAnimationClip = playerAnimation["Attack3-2"].clip;
break;
case ActionState.Attack_3_3:
delayTime = -0.1f;
playerAnimation.CrossFade("Attack3-3", 0.15f);
currentAnimationClip = playerAnimation["Attack3-3"].clip;
break;
case ActionState.Attack_4:
delayTime = -0.1f;
playerAnimation.CrossFade("Attack4", 0.15f);
currentAnimationClip = playerAnimation["Attack4"].clip;
break;
case ActionState.Idle:
playerAnimation.CrossFade("Idle", 0.35f);
currentAnimationClip = playerAnimation["Idle"].clip;
break;
case ActionState.Jump:
playerAnimation.CrossFade("Jump", 0.15f);
currentAnimationClip = playerAnimation["Jump"].clip;
break;
case ActionState.Run:
playerAnimation.CrossFade("Run", 0.15f);
currentAnimationClip = playerAnimation["Run"].clip;
break;
case ActionState.Fire:
playerAnimation.CrossFade("Fire", 0.15f);
currentAnimationClip = playerAnimation["Fire"].clip;
break;
default: break;
}
//Switch to default if an animation is almost over
if (playerAnimation[currentAnimationClip.name].time > (playerAnimation[currentAnimationClip.name].length + delayTime)){
actionState = ActionState.Idle;
currentAnimationClip = playerAnimation["Idle"].clip;
}
}在update函数中加入相应的逻辑函数：
// Update is called once per frame
void Update () {
float h = Input.GetAxis("Horizontal");
float v = Input.GetAxis("Vertical");
MovementManagement (h, v);
Animate ();
}MovementManagement函数就是依据输入处理角色行走的
void MovementManagement(float horizontal, float vertical)
{
if(horizontal != 0f || vertical != 0f)
{
Rotating(horizontal, vertical);
actionState = ActionState.Run;
moveDirection = new Vector3(horizontal, 0.0f, vertical);
rigidbody.MovePosition(rigidbody.position + speed * moveDirection * Time.deltaTime);
}
}
平滑转身函数（參考Unity官网的toturial）
void Rotating(float horizontal, float vertival)
{
Vector3 targetDirection = new Vector3 (horizontal, 0f, vertival);
// Create a rotation based on this new vector assuming that up is the global y axis.
Quaternion targetRotation = Quaternion.LookRotation(targetDirection, Vector3.up);
// Create a rotation that is an increment closer to the target rotation from the player's rotation.
Quaternion newRotation = Quaternion.Lerp(rigidbody.rotation, targetRotation, turnSmoothing * Time.deltaTime);
// Change the players rotation to this new rotation.
rigidbody.MoveRotation(newRotation);
}因为这里是简单的平地，所以处理起来比較简单。当须要控制角色在复杂的地形上行走的时候，比方山川丘陵，就须要角色在Y方变化了。这个时候仅仅须要勾选角色的rigidbody component的 use gravity。然后限制rigidbody的x。z方向的移动了，x，z方向的移动要全然靠脚本来处理。
角色连击
首先来思考一下逻辑。
角色初始值状态是Idle。此时按下攻击。发连招的第一招，假设玩家继续按的话就进入第二招，依次类推，假设中途停下的话，就还是回到Idle状态。这是最简单的单线连招的逻辑，没有考虑打断，多连等情况，代码实现例如以下：
void AttackLogic()
{
if (Input.GetButtonDown ("Fire1"))
{
if(actionState != ActionState.Attack_3_1 && actionState != ActionState.Attack_3_2
&& actionState != ActionState.Attack_3_3&& actionState != ActionState.Attack_4)
{
Debug.Log ("Fire");
actionState = ActionState.Attack_3_1;
}
else if(actionState == ActionState.Attack_3_1 && playerAnimation[currentAnimationClip.name].time > 1.0f)
{
actionState = ActionState.Attack_3_2;
}
else if(actionState == ActionState.Attack_3_2 && playerAnimation[currentAnimationClip.name].time > 1.0f)
{
actionState = ActionState.Attack_3_3;
}
else if(actionState == ActionState.Attack_3_3 && playerAnimation[currentAnimationClip.name].time > 1.0f)
{
actionState = ActionState.Attack_4;
}
/*else if(actionState == ActionState.Attack_3 && playerAnimation[currentAnimationClip.name].time > 2.0f)
{
actionState = ActionState.Idle;
}*/
}
else if(Input.GetButtonDown ("Jump"))
{
actionState = ActionState.Jump;
}
else if(Input.GetButtonDown ("Fire2"))
{
actionState = ActionState.Fire;
//if (currentSkill==null)
}
}执行一下，就能够实现最開始的那个效果了。
參考
Unity3d toturial - Stealth