У меня есть два шейдера, UnlitRGBA и TransparentNoOverlap. Они следующие:
UnlitRGBA.shaderlab
// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)
// modified by rbjacob101
Shader "Particles/Standard Unlit (RGBA)"
{
Properties
{
_MainTex("Albedo", 2D) = "white" {}
_Color("Color", Color) = (1,1,1,1)
_Cutoff("Alpha Cutoff", Range(0.0, 1.0)) = 0.5
_BumpScale("Scale", Float) = 1.0
_BumpMap("Normal Map", 2D) = "bump" {}
_EmissionColor("Color", Color) = (0,0,0)
_EmissionMap("Emission", 2D) = "white" {}
_DistortionStrength("Strength", Float) = 1.0
_DistortionBlend("Blend", Range(0.0, 1.0)) = 0.5
_SoftParticlesNearFadeDistance("Soft Particles Near Fade", Float) = 0.0
_SoftParticlesFarFadeDistance("Soft Particles Far Fade", Float) = 1.0
_CameraNearFadeDistance("Camera Near Fade", Float) = 1.0
_CameraFarFadeDistance("Camera Far Fade", Float) = 2.0
// Hidden properties
[HideInInspector] _Mode("__mode", Float) = 0.0
[HideInInspector] _ColorMode("__colormode", Float) = 0.0
[HideInInspector] _FlipbookMode("__flipbookmode", Float) = 0.0
[HideInInspector] _LightingEnabled("__lightingenabled", Float) = 0.0
[HideInInspector] _DistortionEnabled("__distortionenabled", Float) = 0.0
[HideInInspector] _EmissionEnabled("__emissionenabled", Float) = 0.0
[HideInInspector] _BlendOp("__blendop", Float) = 0.0
[HideInInspector] _SrcBlend("__src", Float) = 1.0
[HideInInspector] _DstBlend("__dst", Float) = 0.0
[HideInInspector] _ZWrite("__zw", Float) = 1.0
[HideInInspector] _Cull("__cull", Float) = 2.0
[HideInInspector] _SoftParticlesEnabled("__softparticlesenabled", Float) = 0.0
[HideInInspector] _CameraFadingEnabled("__camerafadingenabled", Float) = 0.0
[HideInInspector] _SoftParticleFadeParams("__softparticlefadeparams", Vector) = (0,0,0,0)
[HideInInspector] _CameraFadeParams("__camerafadeparams", Vector) = (0,0,0,0)
[HideInInspector] _ColorAddSubDiff("__coloraddsubdiff", Vector) = (0,0,0,0)
[HideInInspector] _DistortionStrengthScaled("__distortionstrengthscaled", Float) = 0.0
}
Category
{
SubShader
{
Tags{ "RenderType" = "Opaque" "IgnoreProjector" = "True" "PreviewType" = "Plane" "PerformanceChecks" = "False" }
BlendOp[_BlendOp]
Blend[_SrcBlend][_DstBlend]
ZWrite[_ZWrite]
Offset -1, -1
Cull[_Cull]
ColorMask RGBA
GrabPass
{
Tags{ "LightMode" = "Always" }
"_GrabTexture"
}
Pass
{
Name "ShadowCaster"
Tags{ "LightMode" = "ShadowCaster" }
BlendOp Add
Blend One Zero
ZWrite On
Cull Off
CGPROGRAM
#pragma target 2.5
#pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHAPREMULTIPLY_ON _ALPHAMODULATE_ON
#pragma shader_feature _ _COLOROVERLAY_ON _COLORCOLOR_ON _COLORADDSUBDIFF_ON
#pragma shader_feature _REQUIRE_UV2
#pragma multi_compile_shadowcaster
#pragma multi_compile_instancing
#pragma instancing_options procedural:vertInstancingSetup
#pragma vertex vertParticleShadowCaster
#pragma fragment fragParticleShadowCaster
#include "UnityStandardParticleShadow.cginc"
ENDCG
}
Pass
{
Tags{ "LightMode" = "ForwardBase" }
CGPROGRAM
#pragma multi_compile __ SOFTPARTICLES_ON
#pragma multi_compile_fog
#pragma target 2.5
#pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHAPREMULTIPLY_ON _ALPHAMODULATE_ON
#pragma shader_feature _ _COLOROVERLAY_ON _COLORCOLOR_ON _COLORADDSUBDIFF_ON
#pragma shader_feature _NORMALMAP
#pragma shader_feature _EMISSION
#pragma shader_feature _FADING_ON
#pragma shader_feature _REQUIRE_UV2
#pragma shader_feature EFFECT_BUMP
#pragma vertex vertParticleUnlit
#pragma fragment fragParticleUnlit
#pragma multi_compile_instancing
#pragma instancing_options procedural:vertInstancingSetup
#include "UnityStandardParticles.cginc"
ENDCG
}
}
}
Fallback "VertexLit"
CustomEditor "StandardParticlesShaderGUI"
}
TransparentNoOverlap.shader
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
/*
* Taken from:
* https://forum.unity.com/threads/transparent-depth-shader-good-for-ghosts.149511/
*/
Shader "Transparent/TransparentNoOverlap" {
Properties {
[PerRendererData]_Color ("Main Color", Color) = (1,1,1,1)
_MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
}
SubShader {
Tags {"RenderType"="Transparent" "Queue"="Transparent" "IgnoreProjector"="True"}
LOD 200
Pass {
Name "TRANSPARENT"
ZWrite On
ZTest LEqual
Blend SrcAlpha OneMinusSrcAlpha
ColorMask RGBA
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
fixed4 _Color;
struct v2f {
float4 pos : SV_POSITION;
};
v2f vert (appdata_base v)
{
v2f o;
o.pos = UnityObjectToClipPos (v.vertex);
return o;
}
half4 frag (v2f i) : COLOR
{
return _Color;
}
ENDCG
}
CGPROGRAM
#pragma surface surf Lambert alpha
#pragma debug
sampler2D _MainTex;
fixed4 _Color;
struct Input {
float2 uv_MainTex;
};
void surf (Input IN, inout SurfaceOutput o) {
fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;
o.Albedo = c.rgba;
o.Alpha = c.a;
}
ENDCG
}
Fallback "Transparent/Diffuse"
}
Я хочу, чтобы материалы, использующие UnlitRGBA, всегда отображались поверх TransparentNoOverlap. Что бы я сделал, чтобы достичь этого результата? Я попытался добавить Offset -1, -1 или Offset 0, -1 в UnlitRGBA. При тестировании этого со стандартным поверхностным шейдером, он работает нормально, а UnlitRGBA последовательно рендерит сверху. Но при рендеринге с TransparentNoOverlap, либо есть z-бои, либо TransparentNoOverlap всегда рендерит сверху. Почему это? Я думаю, что, возможно, это как-то связано с ZTests или ZWrites, но я в конечном счете не уверен.
Я прошу прощения за большие примеры кода ... Спасибо за любую помощь, которую вы можете предоставить.
rbjacob