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先上效果
上Shader
Shader "Unlit/Transparent Colored Flow Texture"
{
Properties
{
_MainTex ("Base (RGB), Alpha (A)", 2D) = "black" {}
_FlashTex("Flash (RGB), Alpha (A)", 2D) = "white" {}
_FlashColor("Flash Color", Color) = (1,1,1,0)
_Width("Width", Float) = 0.2
_Speed("Speed", Float) = 1.0
_Angle("Angle", Float) = 0.1
_TotalTime("Begin Time", Float) = 0.0
}
SubShader
{
LOD 200
Tags
{
"Queue" = "Transparent"
"IgnoreProjector" = "True"
"RenderType" = "Transparent"
}
Pass
{
Cull Off
Lighting Off
ZWrite Off
Fog { Mode Off }
Offset -1, -1
Blend SrcAlpha OneMinusSrcAlpha
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
sampler2D _MainTex;
float4 _MainTex_ST;
sampler2D _FlashTex;
float4 _FlashColor;
float _Width;
float _Speed;
float _Angle;
float _TotalTime;
struct appdata_t
{
float4 vertex : POSITION;
float2 texcoord : TEXCOORD0;
fixed4 color : COLOR;
};
struct v2f
{
float4 vertex : SV_POSITION;
half2 texcoord : TEXCOORD0;
fixed4 color : COLOR;
};
v2f o;
v2f vert (appdata_t v)
{
o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);
o.texcoord = v.texcoord;
o.color = v.color;
return o;
}
fixed4 frag (v2f IN) : COLOR
{
float4 col = tex2D(_MainTex, IN.texcoord) * IN.color;
float pivot = fmod(_Time.y,_TotalTime)*_Speed+IN.texcoord.y*tan(_Angle);
//pivot = pivot-floor(pivot);
float diff = IN.texcoord.x-pivot;
if(abs(diff)<_Width*0.5)
{
float2 uv = float2((0.5+diff)/_Width,IN.texcoord.y);
float4 flashCol = tex2D(_FlashTex,uv)*_FlashColor;
col.rgb = lerp(col.rgb,flashCol.rgb,flashCol.w);
}
return col;
}
ENDCG
}
}
SubShader
{
LOD 100
Tags
{
"Queue" = "Transparent"
"IgnoreProjector" = "True"
"RenderType" = "Transparent"
}
Pass
{
Cull Off
Lighting Off
ZWrite Off
Fog { Mode Off }
Offset -1, -1
ColorMask RGB
Blend SrcAlpha OneMinusSrcAlpha
ColorMaterial AmbientAndDiffuse
SetTexture [_MainTex]
{
Combine Texture * Primary
}
}
}
}
脚本
using UnityEngine; using System.Collections; /*------------------------------------------------------------------- Copyright 2015 Minty Game LTD. All Rights Reserved. Maintained by blue ------------------------------------------------------------------- blue 2016-01-26 14:45:52 带流光的UITexture */ [ExecuteInEditMode] [RequireComponent(typeof(UITexture))] public class UIFlowTexture : MonoBehaviour { //流光纹理的宽度 [SerializeField] private float FlowWidth = 0.2f; //流光颜色 [SerializeField] private Texture FlowTexture = null; //流光速度 [SerializeField] private float FlowTime = 0.5f; //流光播放完之后的延迟时间 [SerializeField] private float DelayTime = 1.0f; //流光纹理的斜度 [SerializeField] private float Angle = -0.1f; //流光颜色 [SerializeField] private Color FlowColor = Color.white; //是否开启流光 [SerializeField] private bool Flow = true; //被流光的UITexture private UITexture mUITexture; void Awake() { mUITexture = gameObject.GetComponent<UITexture>(); } // Use this for initialization void Start () {
//注意这是我们的资源加载方式，你可以改成自己的 ResourceManager.PrepareResource<Material>(Resource.Dir.Material + "UITexture_Flow.mat", material => { mUITexture.material = new Material(material); RefreshMaterialProperty(); }); } void SetFlow(bool flag) { if(Flow!=flag) { Flow = flag; RefreshMaterialProperty(); } } [ContextMenu("Refresh Material Property")] public void RefreshMaterialProperty() { var mat = mUITexture.material; if(null==mat) { return; } if(null!=FlowTexture) { mat.SetTexture("_FlashTex", FlowTexture); } mat.SetFloat("_Width", FlowWidth); mat.SetFloat("_Speed", 1.0f/FlowTime); mat.SetFloat("_Angle", Angle); if (Flow) { mat.SetColor("_FlashColor", FlowColor); } else { mat.SetColor("_FlashColor", new Color(0, 0, 0, 0)); } if (null != mat) { mat.SetFloat("_TotalTime", FlowTime+DelayTime); } mUITexture.SetDirty(); } }
搞法：
1、创建个材质命名成UITexture_Flow.mat，把上面的shader拖拽进去。
2、创建GameObject，挂上UITexture(不用修改的材质，原因是我代码里会去修改他的材质。为什么总是new 新的材质，原因是每个UITexture都要自己流动自己的)
3、然后再挂上UITextureFlow，设置流光的参数
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原文地址：http://www.cnblogs.com/mrblue/p/5163030.html
