Unity 技巧集合
(来自：http://unity3d.9tech.cn/news/2014/0109/39576.html)
这篇文章将收集unity的相关技巧，会不断地更新内容。
1）保存运行中的状态
unity在运行状态时是不能够保存的。但在运行时编辑的时候，有时会发现比较好的效果想保存。这时可以在 “Hierarchy”中复制相关对象树，暂停游戏后替换原来的，就可以了。
2）Layer的用法
LayerMask.NameToLayer("Ground"); // 通过名字获取layer
3D Raycast
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RaycastHit hit;
if
(Physics.Raycast(cam3d.ScreenPointToRay(Input.mousePosition), out hit, Mathf.Infinity, (1<<LayerMask.NameToLayer(
"Ground"
)))) {
...
}
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Collider2D h = Physics2D.OverlapPoint(cam2d.ScreenToWorldPoint(Input.mousePosition), (1<<LayerMask.NameToLayer(
"xxx"
)));
if
(h) {
...
}
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Texture2D exactCamData() {
// get the sample pixels
Texture2D snap =
new
Texture2D((int)detectSize.x, (int)detectSize.y);
snap.SetPixels(webcamTexture.GetPixels((int)detectStart.x, (int)detectStart.y, (int)detectSize.x, (int)detectSize.y));
snap.Apply();
return
snap;
}
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System.IO.File.WriteAllBytes(Application.dataPath +
"/test.png"
, exactCamData().EncodeToPNG());
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4) 操作componenent
添加：
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CircleCollider2D cld = (CircleCollider2D)colorYuan[i].AddComponent(
typeof
(CircleCollider2D));
cld.radius = 1;
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Destroy(transform.gameObject.GetComponent<SpriteRenderer>());
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5）动画相关
状态Init到状态fsShake的的条件为：参数shake＝＝true；代码中的写法：
触发fsShake：
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void Awake() {
anims =
new
Animator[(int)FColorType.ColorNum];
}
....
if
(needShake) {
curAnim.SetTrigger(
"shake"
);
}
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void Update() {
....
if
(curAnim) {
AnimatorStateInfo stateInfo = curAnim.GetCurrentAnimatorStateInfo(0);
if
(stateInfo.nameHash == Animator.StringToHash(
"Base Layer.fsShake"
)) {
curAnim.SetBool(
"shake"
,
false
);
curAnim =
null
;
print (
"======>>>>> stop shake!!!!"
);
}
}
....
}
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6）scene的切换
同步方式：
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Application.LoadLevel(currentName);
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Application.LoadLevelAsync(
"ARScene"
);
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Resources.Load<Texture>(string.Format(
"{0}{1:D2}"
, mPrefix, 5));
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8）Tag VS. Layer
－> Tag用来查询对象
－> Layer用来确定哪些物体可以被raycast，还有用在camera render中
9）旋转
transform.eulerAngles 可以访问 rotate的 xyz|
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transform.RotateAround(pivotTransVector, Vector3.up, -0.5f * (tmp-preX) * speed);
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PlayerPrefs.SetInt(
"isInit_"
+ Application.loadedLevelName, 1);
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11）动画编码
http://www.cnblogs.com/lopezycj/archive/2012/05/18/Unity3d_AnimationEvent.html
http://game.ceeger.com/Components/animeditor-AnimationEvents.html
http://answers.unity3d.com/questions/8172/how-to-add-new-curves-or-animation-events-to-an-im.html
12) 遍历子对象
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Transform[] transforms = target.GetComponentsInChildren<Transform>();
for
(int i = 0, imax = transforms.Length; i < imax; ++i) {
Transform t = transforms[i];
t.gameObject.SendMessage(functionName, gameObject, SendMessageOptions.DontRequireReceiver);
}
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13)音效的播放
先添加Auido Source， 设置Audio Clip, 也可以在代码中加入。然后在代码中调用audio.Play(), 参考如下代码：
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public AudioClip aClip;
...
void Start () {
...
audio.clip = aClips;
audio.Play();
...
}
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另外，如果是3d音效的话，需要调整audio Souce中的panLevel才能听到声音，不清楚原因。
14）调试技巧
可以在OnDrawGizmos函数来进行矩形区域等，达到调试的目的，请参考NGUI中的UIDraggablePanel.cs文件中的那个函数实现。
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#if UNITY_EDITOR
/// <summary>
/// Draw a visible orange outline of the bounds.
/// </summary>
void OnDrawGizmos ()
{
if
(mPanel !=
null
)
{
Bounds b = bounds;
Gizmos.matrix = transform.localToWorldMatrix;
Gizmos.color =
new
Color(1f, 0.4f, 0f);
Gizmos.DrawWireCube(
new
Vector3(b.center.x, b.center.y, b.min.z),
new
Vector3(b.size.x, b.size.y, 0f));
}
}
#endif
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StartCoroutine(DestoryPlayer());
...
IEnumerator DestoryPlayer() {
Instantiate(explosionPrefab, transform.position, transform.rotation);
gameObject.renderer.enabled =
false
;
yield
return
new
WaitForSeconds(1.5f);
gameObject.renderer.enabled =
true
;
}
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Random.seed = System.Environment.TickCount;
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void OnGUI() {
GUILayout.Label(
"deltaTime is: "
+ Time.deltaTime);
}
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