Unity项目中world space状态下的UGUI始终渲染在最上层
简介
使用shader创建材质球，赋值到UGUI的对象上，使该UGUI对象始终渲染在最上层。
原文章中是在制作VR项目时，但其实在除Screen Space-Overlay状态下，都可使用。只要符合实际需求即可。
因为拥有该shader的UGUI不会被一般的3D物体所遮挡，故要根据具体需求使用。
shader
shader出自：https://blog.csdn.net/u013032852/article/details/77642262
Shader "UI/Overlay"
{
Properties
{
[PerRendererData] _MainTex("Font 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
}
SubShader
{
LOD 100
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 Always
Offset -1, -1
Blend SrcAlpha OneMinusSrcAlpha
ColorMask[_ColorMask]
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
#include "UnityUI.cginc"
struct appdata_t
{
float4 vertex : POSITION;
float2 texcoord : TEXCOORD0;
float4 color : COLOR;
};
struct v2f
{
float4 vertex : SV_POSITION;
half2 texcoord : TEXCOORD0;
fixed4 color : COLOR;
};
sampler2D _MainTex;
float4 _MainTex_ST;
fixed4 _Color;
fixed4 _TextureSampleAdd;
v2f vert(appdata_t v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);
o.color = v.color * _Color;
#ifdef UNITY_HALF_TEXEL_OFFSET
o.vertex.xy += (_ScreenParams.zw - 1.0)*float2(-1,1);
#endif
return o;
}
fixed4 frag(v2f i) : SV_Target
{
fixed4 col = (tex2D(_MainTex, i.texcoord) + _TextureSampleAdd) * i.color;
clip(col.a - 0.01);
return col;
}
ENDCG
}
}
}