本文最后更新于 2026年7月8日 上午
DOTS Shader 需要同时支持SRP Batch 和 GPU Instacing
参考Unity官方文档修改即可
示例Shader
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Shader "DOTS/Example"
{
Properties
{
_BaseMap ("Texture", 2D) = "white" {}// 主贴图
_Color ("Color", Color) = (1,1,1,1) //颜色
}
SubShader
{
Tags
{
"RenderType"="Opaque"
"RenderPipeLine"="UniversalRenderPipeline" //用于指明使用URP来渲染
}
Pass
{
// Pass的标签
Tags {}
HLSLPROGRAM
// 编译指令
#pragma vertex vert // vertex shader 的函数 是 vert
#pragma fragment frag // fragment shader 的函数 是 frag
#pragma multi_compile_instancing
#include_with_pragmas "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DOTS.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
// 支持SRP Batcher
CBUFFER_START(UnityPerMaterial)
//声明变量
float4 _BaseMap_ST;
float4 _Color;
CBUFFER_END
TEXTURE2D(_BaseMap); //贴图采样
SAMPLER(sampler_BaseMap);
#ifdef UNITY_DOTS_INSTANCING_ENABLED
UNITY_DOTS_INSTANCING_START(MaterialPropertyMetadata)
UNITY_DOTS_INSTANCED_PROP(float4, _Color)
UNITY_DOTS_INSTANCING_END(MaterialPropertyMetadata)
#endif
// a2v -> attribute to vertex
struct a2v //顶点着色器
{
float4 positionOS: POSITION;
float2 uv : TEXCOORD0;
UNITY_VERTEX_INPUT_INSTANCE_ID
};
// v2f -> vertex to fragment
struct v2f //片元着色器
{
float4 positionCS: SV_POSITION;
float2 uv: TEXCOORD0;
UNITY_VERTEX_INPUT_INSTANCE_ID
};
v2f vert(a2v v)
{
v2f o;
UNITY_SETUP_INSTANCE_ID(v);
UNITY_TRANSFER_INSTANCE_ID(v, o);
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
o.positionCS = TransformObjectToHClip(v.positionOS.xyz);
o.uv = TRANSFORM_TEX(v.uv, _BaseMap);
return o;
}
half4 frag(v2f i) : SV_Target /* 注意在HLSL中，fixed4类型变成了half4类型*/
{
UNITY_SETUP_INSTANCE_ID(i);
half4 col = SAMPLE_TEXTURE2D(_BaseMap, sampler_BaseMap, i.uv);
return col * _Color;
}
ENDHLSL
}
}
// Fallback "Universal Render Pipeline/Unlit"
}
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