新手引导最好和业务逻辑拆开,也就是做新手引导的程序员不能去影响到下面做系统的人。
1.开发一个新手引导编辑器,让策划配出每个引导的点击区域。
2.在Shader中扣一个洞。(圆形或者矩形)用来做显示的点击区域。
3.新手引导的进度需要与服务器进行同步,为了不影响到下面的业务逻辑,在最顶层将UI事件拦截后,渗透点击事件并且与服务器同步进度。渗透事件可以参考我之前的文章,Unity3D研究院之将UI的点击事件渗透下去(九十)
http://www.xuanyusong.com/archives/4241
Drag摇杆的事件,需要把Begin Draging End都要渗透下去。按钮、列表中的Cell元素的点击事件需要特殊注意一下,因为要点击在Cell上,而不是最前面的UI上。
4.新手引导的出现条件,大部分都是打开某个UI并且拥有控制焦点,可能还有 等级/接任务/交任务/进场景 。可以将这些关键点作为事件抛出,在新手引导模块中处理即可。
5.强制引导需要注意,很有可能把玩家卡死。比如引导玩家进副本,请求进副本的消息,和请求新手引导进度的消息是两个不同的,那么就有一定概率出现一个发送成功,另一个发送不成功,如果此时又触发掉线,重进游戏估计就肯定就卡死了。 所以保险起见强制引导最好也可以让玩家跳过。(比如点击空白区域超过5次)
6.最后在分享一个UI的效果,周围是灰色蒙版,然后四周向点击区域聚合的动画。
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
/// <summary>
/// 新手引导动画
/// </summary>
public class Guide : MonoBehaviour {
public Image target;
private Vector4 center;
private Material material;
private float diameter; // 直径
private float current =0f;
Vector3[] corners = new Vector3[4];
void Awake ()
{
Canvas canvas = GameObject.Find ("Canvas").GetComponent<Canvas> ();
target.rectTransform.GetWorldCorners (corners);
diameter = Vector2.Distance (WordToCanvasPos(canvas,corners [0]), WordToCanvasPos(canvas,corners [2])) / 2f;
float x =corners [0].x + ((corners [3].x - corners [0].x) / 2f);
float y =corners [0].y + ((corners [1].y - corners [0].y) / 2f);
Vector3 center = new Vector3 (x, y, 0f);
Vector2 position = Vector2.zero;
RectTransformUtility.ScreenPointToLocalPointInRectangle(canvas.transform as RectTransform, center, canvas.GetComponent<Camera>(), out position);
center = new Vector4 (position.x,position.y,0f,0f);
material = GetComponent<Image>().material;
material.SetVector ("_Center", center);
(canvas.transform as RectTransform).GetWorldCorners (corners);
for (int i = 0; i < corners.Length; i++) {
current = Mathf.Max(Vector3.Distance (WordToCanvasPos(canvas,corners [i]), center),current);
}
material.SetFloat ("_Silder", current);
}
float yVelocity = 0f;
void Update () {
float value = Mathf.SmoothDamp(current, diameter, ref yVelocity, 0.3f);
if (!Mathf.Approximately (value, current)) {
current = value;
material.SetFloat ("_Silder", current);
}
}
void OnGUI(){
if(GUILayout.Button("Test")){
Awake ();
}
}
Vector2 WordToCanvasPos(Canvas canvas,Vector3 world){
Vector2 position = Vector2.zero;
RectTransformUtility.ScreenPointToLocalPointInRectangle(canvas.transform as RectTransform, world, canvas.GetComponent<Camera>(), out position);
return position;
}
}
shader是在UI-Default的基础上改了,原理就是扣一个洞,修改每个点的颜色。 –add–是修改的代码。如果unity版本升级shader变化,把–add–中的代码加上即可。
Shader "UI/Default_Mask"
{
Properties
{
[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
_Color ("Tint", Color) = (1,1,1,1)
_StencilComp ("Stencil Comparison", Float) = 8
_Stencil ("Stencil ID", Float) = 0
_StencilOp ("Stencil Operation", Float) = 0
_StencilWriteMask ("Stencil Write Mask", Float) = 255
_StencilReadMask ("Stencil Read Mask", Float) = 255
_ColorMask ("Color Mask", Float) = 15
[Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip ("Use Alpha Clip", Float) = 0
//-------------------add----------------------
_Center("Center", vector) = (0, 0, 0, 0)
_Silder ("_Silder", Range (0,1000)) = 1000 // sliders
//-------------------add----------------------
}
SubShader
{
Tags
{
"Queue"="Transparent"
"IgnoreProjector"="True"
"RenderType"="Transparent"
"PreviewType"="Plane"
"CanUseSpriteAtlas"="True"
}
Stencil
{
Ref [_Stencil]
Comp [_StencilComp]
Pass [_StencilOp]
ReadMask [_StencilReadMask]
WriteMask [_StencilWriteMask]
}
Cull Off
Lighting Off
ZWrite Off
ZTest [unity_GUIZTestMode]
Blend SrcAlpha OneMinusSrcAlpha
ColorMask [_ColorMask]
Pass
{
Name "Default"
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma target 2.0
#include "UnityCG.cginc"
#include "UnityUI.cginc"
#pragma multi_compile __ UNITY_UI_ALPHACLIP
struct appdata_t
{
float4 vertex : POSITION;
float4 color : COLOR;
float2 texcoord : TEXCOORD0;
UNITY_VERTEX_INPUT_INSTANCE_ID
};
struct v2f
{
float4 vertex : SV_POSITION;
fixed4 color : COLOR;
float2 texcoord : TEXCOORD0;
float4 worldPosition : TEXCOORD1;
UNITY_VERTEX_OUTPUT_STEREO
};
fixed4 _Color;
fixed4 _TextureSampleAdd;
float4 _ClipRect;
//-------------------add----------------------
float _Silder;
float2 _Center;
//-------------------add----------------------
v2f vert(appdata_t IN)
{
v2f OUT;
UNITY_SETUP_INSTANCE_ID(IN);
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
OUT.worldPosition = IN.vertex;
OUT.vertex = UnityObjectToClipPos(OUT.worldPosition);
OUT.texcoord = IN.texcoord;
OUT.color = IN.color * _Color;
return OUT;
}
sampler2D _MainTex;
fixed4 frag(v2f IN) : SV_Target
{
half4 color = (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd) * IN.color;
color.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect);
#ifdef UNITY_UI_ALPHACLIP
clip (color.a - 0.001);
#endif
//-------------------add----------------------
color.a*=(distance(IN.worldPosition.xy,_Center.xy) > _Silder);
color.rgb*= color.a;
//-------------------add----------------------
return color;
}
ENDCG
}
}
}
如下图所示,脚本挂在bg上,target就是点击区域的Image。
Play游戏就能看到动画效果。如下图所示,我们项目是有UI摄像机的,所以canvas和camera需要注意一下,有UI摄像机和没UI摄像机算区域是不同的。
OK ,这个方法我已经在项目中使用, 如果有什么想法或者建议欢迎在下面给我留言。
测试版本unity5.5.2
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