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Unity中Shader序列帧动画（总结篇）_unity 序列帧动画shader
作者：盐析白兔 | 2024-02-25 03:38:00
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unity 序列帧动画shader
前言
在前几篇文章中，我们依次解决了实现Shader序列帧动画所遇到的问题。
我们在这篇文章中，对其进行优化、适配BRP 和 总结。
一、半透明混合自定义调整
1、属性面板
[Enum(UnityEngine.Rendering.BlendMode)]_SrcFactor(“SrcFactor”,int) = 0
[Enum(UnityEngine.Rendering.BlendMode)]_DstFactor(“DstFactor”,int) = 0
2、SubShader中
Blend [_SrcFactor] [_DstFactor]
3、在片元着色器(可选)
- 使用返回颜色的rgb值与alpha值相乘输出，防止雾效影响透明度
col.rgb = col.rgb * col.a;
3、根据纹理情况自己调节
二、适配Build In Render Pipeline
SubShader { Tags { //渲染类型 "RenderType"="Transparent" //渲染队列 "Queue"="Transparent" } Blend [_SrcFactor] [_DstFactor] Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag #pragma multi_compile_fog #include "UnityCG.cginc" struct appdata { float3 vertexOS : POSITION; float2 uv : TEXCOORD0; }; struct v2f { float4 vertexCS : SV_POSITION; float2 uv : TEXCOORD1; UNITY_FOG_COORDS(2) }; float4 _Color; sampler2D _MainTex; float4 _MainTex_ST; half4 _Sequence; v2f vert(appdata v) { v2f o; o.vertexCS = UnityObjectToClipPos(v.vertexOS); o.uv = float2(v.uv.x / _Sequence.y, v.uv.y / _Sequence.x + (_Sequence.x - 1) / _Sequence.x); o.uv.x += frac(floor(_Time.y * _Sequence.y * _Sequence.z) / _Sequence.y); o.uv.y -= frac(floor(_Time.y * _Sequence.y * _Sequence.z / _Sequence.y) / _Sequence.x); //o.uv.x += floor(_Time.y); //o.uv = float2(v.uv.x/4,v.uv.y/4); //o.uv = TRANSFORM_TEX(v.uv,_MainTex); UNITY_TRANSFER_FOG(o, o.vertex) return o; } half4 frag(v2f i) : SV_Target { float4 mainTex = tex2D(_MainTex, i.uv); float4 col = mainTex * _Color; UNITY_APPLY_FOG(i.fogCoord, col) col.rgb = col.rgb * col.a; return col; } ENDCG } }
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三、最终代码
Shader "MyShader/URP/P3_9" { Properties { [Enum(UnityEngine.Rendering.BlendMode)]_SrcFactor("SrcFactor",int) = 0 [Enum(UnityEngine.Rendering.BlendMode)]_DstFactor("DstFactor",int) = 0 _Color("Color",Color) = (1,1,1,1) _MainTex("MainTex",2D) = "white"{} _Sequence("Row(X) Column(Y) Speed(Z)",Vector) = (1,1,1,1) } SubShader { Tags { //告诉引擎，该Shader只用于 URP 渲染管线 "RenderPipeline"="UniversalPipeline" //渲染类型 "RenderType"="Transparent" //渲染队列 "Queue"="Transparent" } Blend [_SrcFactor] [_DstFactor] Pass { HLSLPROGRAM #pragma vertex vert #pragma fragment frag #pragma multi_compile_fog #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl" #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl" #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl" struct Attribute { float3 vertexOS : POSITION; float2 uv : TEXCOORD0; }; struct Varying { float4 vertexCS : SV_POSITION; float2 uv : TEXCOORD1; float fogCoord : TEXCOORD2; }; CBUFFER_START(UnityPerMaterial) float4 _Color; float4 _MainTex_ST; half4 _Sequence; CBUFFER_END TEXTURE2D(_MainTex); SAMPLER(sampler_MainTex); Varying vert(Attribute v) { Varying o; o.vertexCS = TransformObjectToHClip(v.vertexOS); o.uv = float2(v.uv.x / _Sequence.y, v.uv.y / _Sequence.x + (_Sequence.x - 1) / _Sequence.x); o.uv.x += frac(floor(_Time.y * _Sequence.y * _Sequence.z) / _Sequence.y); o.uv.y -= frac(floor(_Time.y * _Sequence.y * _Sequence.z / _Sequence.y) / _Sequence.x); //o.uv.x += floor(_Time.y); //o.uv = float2(v.uv.x/4,v.uv.y/4); //o.uv = TRANSFORM_TEX(v.uv,_MainTex); o.fogCoord = ComputeFogFactor(o.vertexCS.z); return o; } half4 frag(Varying i) : SV_Target { float4 mainTex = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.uv); float4 col = mainTex * _Color; col.rgb = MixFog(col, i.fogCoord); col.rgb = col.rgb * col.a; return col; } ENDHLSL } } SubShader { Tags { //渲染类型 "RenderType"="Transparent" //渲染队列 "Queue"="Transparent" } Blend [_SrcFactor] [_DstFactor] Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag #pragma multi_compile_fog #include "UnityCG.cginc" struct appdata { float3 vertexOS : POSITION; float2 uv : TEXCOORD0; }; struct v2f { float4 vertexCS : SV_POSITION; float2 uv : TEXCOORD1; UNITY_FOG_COORDS(2) }; float4 _Color; sampler2D _MainTex; float4 _MainTex_ST; half4 _Sequence; v2f vert(appdata v) { v2f o; o.vertexCS = UnityObjectToClipPos(v.vertexOS); o.uv = float2(v.uv.x / _Sequence.y, v.uv.y / _Sequence.x + (_Sequence.x - 1) / _Sequence.x); o.uv.x += frac(floor(_Time.y * _Sequence.y * _Sequence.z) / _Sequence.y); o.uv.y -= frac(floor(_Time.y * _Sequence.y * _Sequence.z / _Sequence.y) / _Sequence.x); //o.uv.x += floor(_Time.y); //o.uv = float2(v.uv.x/4,v.uv.y/4); //o.uv = TRANSFORM_TEX(v.uv,_MainTex); UNITY_TRANSFER_FOG(o, o.vertex) return o; } half4 frag(v2f i) : SV_Target { float4 mainTex = tex2D(_MainTex, i.uv); float4 col = mainTex * _Color; UNITY_APPLY_FOG(i.fogCoord, col) col.rgb = col.rgb * col.a; return col; } ENDCG } } }
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