女性朋友约我看水，我反手用可视化搞出水面倒影(Shader Graph)
【摘要】 👉关于作者众所周知，人生是一个漫长的流程，不断克服困难，不断反思前进的过程。在这个过程中会产生很多对于人生的质疑和思考，于是我决定将自己的思考，经验和故事全部分享出来，以此寻找共鸣！！！专注于Android/Unity和各种游戏开发技巧，以及各种资源分享（网站、工具、素材、源码、游戏等）👉即将学会Shader Graph可视化Shader编辑工具创作一个水面倒影效果，不需要写代码就能实现...
👉关于作者
众所周知，人生是一个漫长的流程，不断克服困难，不断反思前进的过程。在这个过程中会产生很多对于人生的质疑和思考，于是我决定将自己的思考，经验和故事全部分享出来，以此寻找共鸣！！！
专注于Android/Unity和各种游戏开发技巧，以及各种资源分享（网站、工具、素材、源码、游戏等）
👉即将学会
Shader Graph可视化Shader编辑工具创作一个水面倒影效果，不需要写代码就能实现效果。
👉效果预看
👉背景
在某一个周末的傍晚，小芝突然找到小空。
🙎小芝：你看，你看，夕阳映射的晚霞特别美。
🙈小空：恩，确实。
🙎小芝：……你根本没有认真看，老敷衍怪了。你想想要是在海边倒映出来那多幸福啊。
🙈小空沉思：倒影，倒影，这个怎么能让她在Unity中搞起来呢？
🙎小芝：……，完了完了，又沉寂进去了。
👉案例环境
Unity 2020.3系列f1
Package Manager包管理器中确保安装了Shader Graph
思路：
- 利用另外一个相机捕捉画面，翻转后放到下面。
- 利用Shader Graph为画面添加水波效果。
👉实践过程
首先建立一个WaterShadow的文件夹，以下创建全部在此文件夹下。
右键在里面创建一个Render Texture（渲染器纹理）起名叫做Water Render，尺寸可以看着效果对应着改。
在场景中创建一个Camera（相机），改名为WaterCamera，相机属性和Main Camera（主相机）相同，不同的是摄像的内容是你想要映射的内容。稍微自己调下位置即可。
重点——指定WaterCamera的Output Texture为刚才创建的Water Render。原理：将相机摄入的内容渲染到Water Render中，将这个Render借住其他组件在场景中展示出来即可。
创建一个Square（右键-创建-2D-Sprites中），并且拖拽到场景中，改名为WaterSquare，然后调整合适的位置。
创建一个Shader（右键-Shader-URP-Sprite Unlit Shader），改名为WaterShader，双击就能打开它
超级重点
在这里右键我们可以创建节点Node（有各种各样的类型）
为了在外部能够随时更改里面的内容，我们先创建一个Texture2D变量，然后将变量拖拽到舞台中，接着创建一个Sample Texture 2D节点，最后将变量节点指向此节点的Texture
我们想要先预览一下效果，在WaterShadow文件夹中创建材质Material，改名为WaterMaterial，然后将Shader赋给这个Material一种是直接拖拽WaterShader到WaterMaterial上，一种是在WaterMaterial右侧选择，然后我们将WaterMaterial拖拽赋值给WaterSquare（直接拖拽到场景中赋值即可），接着你就会看到效果啦。
这种效果我们还并不满足，我们要继续往下优化，将内容翻转，所有需要创建Tiling And Offset翻转节点。
接着运行查看发现很像水面的效果了。但这还不够逼真，我们需要模拟出水面的波纹效果。那么我们就需要去继续添加噪点的节点Simple Noise。
这时候还没够，这时候还是静态的，我们需要动态的，那么我们就需要利用时间的变化来动起来（创建Time节点）
经过各种连接后，我们创建了下面一个可视化的Shader。
我们看看运行后的效果：
最后我们附上代码的Shader。文末有想项目源码下载地址。
Shader "WaterShader"
{
Properties
{
[NoScaleOffset]Texture2D_40d3e1ffef7f43f6b3648f291bb5974d("WaterTexture", 2D) = "white" {}
Vector1_3b055a08b82546ffbbe80087a02fe9cb("Speed", Float) = 0.2
Vector1_23db7fea7a93488a82f726fa778690e9("Strength", Float) = 0.02
Color_cfca9819e86340599cd882083808e8c0("Color", Color) = (0.4185208, 0.8962264, 0.8486329, 0.5019608)
[HideInInspector][NoScaleOffset]unity_Lightmaps("unity_Lightmaps", 2DArray) = "" {}
[HideInInspector][NoScaleOffset]unity_LightmapsInd("unity_LightmapsInd", 2DArray) = "" {}
[HideInInspector][NoScaleOffset]unity_ShadowMasks("unity_ShadowMasks", 2DArray) = "" {}
}
SubShader
{
Tags
{
"RenderPipeline"="UniversalPipeline"
"RenderType"="Transparent"
"UniversalMaterialType" = "Unlit"
"Queue"="Transparent"
}
Pass
{
Name "Sprite Unlit"
Tags
{
"LightMode" = "Universal2D"
}
// Render State
Cull Off
Blend SrcAlpha OneMinusSrcAlpha, One OneMinusSrcAlpha
ZTest LEqual
ZWrite Off
// Debug
// <None>
// --------------------------------------------------
// Pass
HLSLPROGRAM
// Pragmas
#pragma target 2.0
#pragma exclude_renderers d3d11_9x
#pragma vertex vert
#pragma fragment frag
// DotsInstancingOptions: <None>
// HybridV1InjectedBuiltinProperties: <None>
// Keywords
// PassKeywords: <None>
// GraphKeywords: <None>
// Defines
#define _SURFACE_TYPE_TRANSPARENT 1
#define ATTRIBUTES_NEED_NORMAL
#define ATTRIBUTES_NEED_TANGENT
#define ATTRIBUTES_NEED_TEXCOORD0
#define ATTRIBUTES_NEED_COLOR
#define VARYINGS_NEED_TEXCOORD0
#define VARYINGS_NEED_COLOR
#define FEATURES_GRAPH_VERTEX
/* WARNING: $splice Could not find named fragment 'PassInstancing' */
#define SHADERPASS SHADERPASS_SPRITEUNLIT
/* WARNING: $splice Could not find named fragment 'DotsInstancingVars' */
// Includes
#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl"
#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Texture.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/TextureStack.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/ShaderGraphFunctions.hlsl"
// --------------------------------------------------
// Structs and Packing
struct Attributes
{
float3 positionOS : POSITION;
float3 normalOS : NORMAL;
float4 tangentOS : TANGENT;
float4 uv0 : TEXCOORD0;
float4 color : COLOR;
#if UNITY_ANY_INSTANCING_ENABLED
uint instanceID : INSTANCEID_SEMANTIC;
#endif
};
struct Varyings
{
float4 positionCS : SV_POSITION;
float4 texCoord0;
float4 color;
#if UNITY_ANY_INSTANCING_ENABLED
uint instanceID : CUSTOM_INSTANCE_ID;
#endif
#if (defined(UNITY_STEREO_MULTIVIEW_ENABLED)) || (defined(UNITY_STEREO_INSTANCING_ENABLED) && (defined(SHADER_API_GLES3) || defined(SHADER_API_GLCORE)))
uint stereoTargetEyeIndexAsBlendIdx0 : BLENDINDICES0;
#endif
#if (defined(UNITY_STEREO_INSTANCING_ENABLED))
uint stereoTargetEyeIndexAsRTArrayIdx : SV_RenderTargetArrayIndex;
#endif
#if defined(SHADER_STAGE_FRAGMENT) && defined(VARYINGS_NEED_CULLFACE)
FRONT_FACE_TYPE cullFace : FRONT_FACE_SEMANTIC;
#endif
};
struct SurfaceDescriptionInputs
{
float4 uv0;
float3 TimeParameters;
};
struct VertexDescriptionInputs
{
float3 ObjectSpaceNormal;
float3 ObjectSpaceTangent;
float3 ObjectSpacePosition;
};
struct PackedVaryings
{
float4 positionCS : SV_POSITION;
float4 interp0 : TEXCOORD0;
float4 interp1 : TEXCOORD1;
#if UNITY_ANY_INSTANCING_ENABLED
uint instanceID : CUSTOM_INSTANCE_ID;
#endif
#if (defined(UNITY_STEREO_MULTIVIEW_ENABLED)) || (defined(UNITY_STEREO_INSTANCING_ENABLED) && (defined(SHADER_API_GLES3) || defined(SHADER_API_GLCORE)))
uint stereoTargetEyeIndexAsBlendIdx0 : BLENDINDICES0;
#endif
#if (defined(UNITY_STEREO_INSTANCING_ENABLED))
uint stereoTargetEyeIndexAsRTArrayIdx : SV_RenderTargetArrayIndex;
#endif
#if defined(SHADER_STAGE_FRAGMENT) && defined(VARYINGS_NEED_CULLFACE)
FRONT_FACE_TYPE cullFace : FRONT_FACE_SEMANTIC;
#endif
};
PackedVaryings PackVaryings (Varyings input)
{
PackedVaryings output;
output.positionCS = input.positionCS;
output.interp0.xyzw = input.texCoord0;
output.interp1.xyzw = input.color;
#if UNITY_ANY_INSTANCING_ENABLED
output.instanceID = input.instanceID;
#endif
#if (defined(UNITY_STEREO_MULTIVIEW_ENABLED)) || (defined(UNITY_STEREO_INSTANCING_ENABLED) && (defined(SHADER_API_GLES3) || defined(SHADER_API_GLCORE)))
output.stereoTargetEyeIndexAsBlendIdx0 = input.stereoTargetEyeIndexAsBlendIdx0;
#endif
#if (defined(UNITY_STEREO_INSTANCING_ENABLED))
output.stereoTargetEyeIndexAsRTArrayIdx = input.stereoTargetEyeIndexAsRTArrayIdx;
#endif
#if defined(SHADER_STAGE_FRAGMENT) && defined(VARYINGS_NEED_CULLFACE)
output.cullFace = input.cullFace;
#endif
return output;
}
Varyings UnpackVaryings (PackedVaryings input)
{
Varyings output;
output.positionCS = input.positionCS;
output.texCoord0 = input.interp0.xyzw;
output.color = input.interp1.xyzw;
#if UNITY_ANY_INSTANCING_ENABLED
output.instanceID = input.instanceID;
#endif
#if (defined(UNITY_STEREO_MULTIVIEW_ENABLED)) || (defined(UNITY_STEREO_INSTANCING_ENABLED) && (defined(SHADER_API_GLES3) || defined(SHADER_API_GLCORE)))
output.stereoTargetEyeIndexAsBlendIdx0 = input.stereoTargetEyeIndexAsBlendIdx0;
#endif
#if (defined(UNITY_STEREO_INSTANCING_ENABLED))
output.stereoTargetEyeIndexAsRTArrayIdx = input.stereoTargetEyeIndexAsRTArrayIdx;
#endif
#if defined(SHADER_STAGE_FRAGMENT) && defined(VARYINGS_NEED_CULLFACE)
output.cullFace = input.cullFace;
#endif
return output;
}
// --------------------------------------------------
// Graph
// Graph Properties
CBUFFER_START(UnityPerMaterial)
float4 Texture2D_40d3e1ffef7f43f6b3648f291bb5974d_TexelSize;
float Vector1_3b055a08b82546ffbbe80087a02fe9cb;
float Vector1_23db7fea7a93488a82f726fa778690e9;
float4 Color_cfca9819e86340599cd882083808e8c0;
CBUFFER_END
// Object and Global properties
SAMPLER(SamplerState_Linear_Repeat);
TEXTURE2D(Texture2D_40d3e1ffef7f43f6b3648f291bb5974d);
SAMPLER(samplerTexture2D_40d3e1ffef7f43f6b3648f291bb5974d);
// Graph Functions
float2 Unity_GradientNoise_Dir_float(float2 p)
{
// Permutation and hashing used in webgl-nosie goo.gl/pX7HtC
p = p % 289;
// need full precision, otherwise half overflows when p > 1
float x = float(34 * p.x + 1) * p.x % 289 + p.y;
x = (34 * x + 1) * x % 289;
x = frac(x / 41) * 2 - 1;
return normalize(float2(x - floor(x + 0.5), abs(x) - 0.5));
}
void Unity_GradientNoise_float(float2 UV, float Scale, out float Out)
{
float2 p = UV * Scale;
float2 ip = floor(p);
float2 fp = frac(p);
float d00 = dot(Unity_GradientNoise_Dir_float(ip), fp);
float d01 = dot(Unity_GradientNoise_Dir_float(ip + float2(0, 1)), fp - float2(0, 1));
float d10 = dot(Unity_GradientNoise_Dir_float(ip + float2(1, 0)), fp - float2(1, 0));
float d11 = dot(Unity_GradientNoise_Dir_float(ip + float2(1, 1)), fp - float2(1, 1));
fp = fp * fp * fp * (fp * (fp * 6 - 15) + 10);
Out = lerp(lerp(d00, d01, fp.y), lerp(d10, d11, fp.y), fp.x) + 0.5;
}
void Unity_Multiply_float(float A, float B, out float Out)
{
Out = A * B;
}
void Unity_Add_float(float A, float B, out float Out)
{
Out = A + B;
}
inline float Unity_SimpleNoise_RandomValue_float (float2 uv)
{
return frac(sin(dot(uv, float2(12.9898, 78.233)))*43758.5453);
}
inline float Unity_SimpleNnoise_Interpolate_float (float a, float b, float t)
{
return (1.0-t)*a + (t*b);
}
inline float Unity_SimpleNoise_ValueNoise_float (float2 uv)
{
float2 i = floor(uv);
float2 f = frac(uv);
f = f * f * (3.0 - 2.0 * f);
uv = abs(frac(uv) - 0.5);
float2 c0 = i + float2(0.0, 0.0);
float2 c1 = i + float2(1.0, 0.0);
float2 c2 = i + float2(0.0, 1.0);
float2 c3 = i + float2(1.0, 1.0);
float r0 = Unity_SimpleNoise_RandomValue_float(c0);
float r1 = Unity_SimpleNoise_RandomValue_float(c1);
float r2 = Unity_SimpleNoise_RandomValue_float(c2);
float r3 = Unity_SimpleNoise_RandomValue_float(c3);
float bottomOfGrid = Unity_SimpleNnoise_Interpolate_float(r0, r1, f.x);
float topOfGrid = Unity_SimpleNnoise_Interpolate_float(r2, r3, f.x);
float t = Unity_SimpleNnoise_Interpolate_float(bottomOfGrid, topOfGrid, f.y);
return t;
}
void Unity_SimpleNoise_float(float2 UV, float Scale, out float Out)
{
float t = 0.0;
float freq = pow(2.0, float(0));
float amp = pow(0.5, float(3-0));
t += Unity_SimpleNoise_ValueNoise_float(float2(UV.x*Scale/freq, UV.y*Scale/freq))*amp;
freq = pow(2.0, float(1));
amp = pow(0.5, float(3-1));
t += Unity_SimpleNoise_ValueNoise_float(float2(UV.x*Scale/freq, UV.y*Scale/freq))*amp;
freq = pow(2.0, float(2));
amp = pow(0.5, float(3-2));
t += Unity_SimpleNoise_ValueNoise_float(float2(UV.x*Scale/freq, UV.y*Scale/freq))*amp;
Out = t;
}
void Unity_TilingAndOffset_float(float2 UV, float2 Tiling, float2 Offset, out float2 Out)
{
Out = UV * Tiling + Offset;
}
void Unity_Multiply_float(float4 A, float4 B, out float4 Out)
{
Out = A * B;
}
// Graph Vertex
struct VertexDescription
{
float3 Position;
float3 Normal;
float3 Tangent;
};
VertexDescription VertexDescriptionFunction(VertexDescriptionInputs IN)
{
VertexDescription description = (VertexDescription)0;
description.Position = IN.ObjectSpacePosition;
description.Normal = IN.ObjectSpaceNormal;
description.Tangent = IN.ObjectSpaceTangent;
return description;
}
// Graph Pixel
struct SurfaceDescription
{
float3 BaseColor;
float Alpha;
};
SurfaceDescription SurfaceDescriptionFunction(SurfaceDescriptionInputs IN)
{
SurfaceDescription surface = (SurfaceDescription)0;
UnityTexture2D _Property_5f96fa6b31874c7c8f49a5ba4c802ea1_Out_0 = UnityBuildTexture2DStructNoScale(Texture2D_40d3e1ffef7f43f6b3648f291bb5974d);
float _Property_e2b4dcb7085e4752ace7d623eaa848a5_Out_0 = Vector1_23db7fea7a93488a82f726fa778690e9;
float _GradientNoise_0295ca2f6ca341b1ac796ec73bf2385e_Out_2;
Unity_GradientNoise_float(IN.uv0.xy, 3, _GradientNoise_0295ca2f6ca341b1ac796ec73bf2385e_Out_2);
float _Property_7166f06b49d84545891345939cacb632_Out_0 = Vector1_3b055a08b82546ffbbe80087a02fe9cb;
float _Multiply_bbf027acfdbb41ccaa57e62650292da4_Out_2;
Unity_Multiply_float(_Property_7166f06b49d84545891345939cacb632_Out_0, IN.TimeParameters.x, _Multiply_bbf027acfdbb41ccaa57e62650292da4_Out_2);
float _Add_31381d66d83848d381412ee3af768cad_Out_2;
Unity_Add_float(_GradientNoise_0295ca2f6ca341b1ac796ec73bf2385e_Out_2, _Multiply_bbf027acfdbb41ccaa57e62650292da4_Out_2, _Add_31381d66d83848d381412ee3af768cad_Out_2);
float _SimpleNoise_634cb24c606344d28b5e7c670c09ba7a_Out_2;
Unity_SimpleNoise_float((_Add_31381d66d83848d381412ee3af768cad_Out_2.xx), 50, _SimpleNoise_634cb24c606344d28b5e7c670c09ba7a_Out_2);
float _Multiply_8c1af9eb25a14ad7910d7c5737106dba_Out_2;
Unity_Multiply_float(_Property_e2b4dcb7085e4752ace7d623eaa848a5_Out_0, _SimpleNoise_634cb24c606344d28b5e7c670c09ba7a_Out_2, _Multiply_8c1af9eb25a14ad7910d7c5737106dba_Out_2);
float2 _Vector2_6686572d44b148c3bd43ea00a7ee71d6_Out_0 = float2(_Multiply_8c1af9eb25a14ad7910d7c5737106dba_Out_2, 1);
float2 _TilingAndOffset_80aee777cdc84f93b09a9f58f7cd8a21_Out_3;
Unity_TilingAndOffset_float(IN.uv0.xy, float2 (1, -1), _Vector2_6686572d44b148c3bd43ea00a7ee71d6_Out_0, _TilingAndOffset_80aee777cdc84f93b09a9f58f7cd8a21_Out_3);
float4 _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0 = SAMPLE_TEXTURE2D(_Property_5f96fa6b31874c7c8f49a5ba4c802ea1_Out_0.tex, _Property_5f96fa6b31874c7c8f49a5ba4c802ea1_Out_0.samplerstate, _TilingAndOffset_80aee777cdc84f93b09a9f58f7cd8a21_Out_3);
float _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_R_4 = _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0.r;
float _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_G_5 = _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0.g;
float _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_B_6 = _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0.b;
float _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_A_7 = _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0.a;
float4 _Property_cc5ba6d85d044fb894405bde6f11b58c_Out_0 = Color_cfca9819e86340599cd882083808e8c0;
float4 _Multiply_a29ff5ef4d7049d2bb4da2beabad978e_Out_2;
Unity_Multiply_float(_SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0, _Property_cc5ba6d85d044fb894405bde6f11b58c_Out_0, _Multiply_a29ff5ef4d7049d2bb4da2beabad978e_Out_2);
surface.BaseColor = (_Multiply_a29ff5ef4d7049d2bb4da2beabad978e_Out_2.xyz);
surface.Alpha = 1;
return surface;
}
// --------------------------------------------------
// Build Graph Inputs
VertexDescriptionInputs BuildVertexDescriptionInputs(Attributes input)
{
VertexDescriptionInputs output;
ZERO_INITIALIZE(VertexDescriptionInputs, output);
output.ObjectSpaceNormal = input.normalOS;
output.ObjectSpaceTangent = input.tangentOS.xyz;
output.ObjectSpacePosition = input.positionOS;
return output;
}
SurfaceDescriptionInputs BuildSurfaceDescriptionInputs(Varyings input)
{
SurfaceDescriptionInputs output;
ZERO_INITIALIZE(SurfaceDescriptionInputs, output);
output.uv0 = input.texCoord0;
output.TimeParameters = _TimeParameters.xyz; // This is mainly for LW as HD overwrite this value
#if defined(SHADER_STAGE_FRAGMENT) && defined(VARYINGS_NEED_CULLFACE)
#define BUILD_SURFACE_DESCRIPTION_INPUTS_OUTPUT_FACESIGN output.FaceSign = IS_FRONT_VFACE(input.cullFace, true, false);
#else
#define BUILD_SURFACE_DESCRIPTION_INPUTS_OUTPUT_FACESIGN
#endif
#undef BUILD_SURFACE_DESCRIPTION_INPUTS_OUTPUT_FACESIGN
return output;
}
// --------------------------------------------------
// Main
#include "Packages/com.unity.render-pipelines.universal/Editor/ShaderGraph/Includes/ShaderPass.hlsl"
#include "Packages/com.unity.render-pipelines.universal/Editor/ShaderGraph/Includes/Varyings.hlsl"
#include "Packages/com.unity.render-pipelines.universal/Editor/ShaderGraph/Includes/SpriteUnlitPass.hlsl"
ENDHLSL
}
Pass
{
Name "Sprite Unlit"
Tags
{
"LightMode" = "UniversalForward"
}
// Render State
Cull Off
Blend SrcAlpha OneMinusSrcAlpha, One OneMinusSrcAlpha
ZTest LEqual
ZWrite Off
// Debug
// <None>
// --------------------------------------------------
// Pass
HLSLPROGRAM
// Pragmas
#pragma target 2.0
#pragma exclude_renderers d3d11_9x
#pragma vertex vert
#pragma fragment frag
// DotsInstancingOptions: <None>
// HybridV1InjectedBuiltinProperties: <None>
// Keywords
// PassKeywords: <None>
// GraphKeywords: <None>
// Defines
#define _SURFACE_TYPE_TRANSPARENT 1
#define ATTRIBUTES_NEED_NORMAL
#define ATTRIBUTES_NEED_TANGENT
#define ATTRIBUTES_NEED_TEXCOORD0
#define ATTRIBUTES_NEED_COLOR
#define VARYINGS_NEED_TEXCOORD0
#define VARYINGS_NEED_COLOR
#define FEATURES_GRAPH_VERTEX
/* WARNING: $splice Could not find named fragment 'PassInstancing' */
#define SHADERPASS SHADERPASS_SPRITEFORWARD
/* WARNING: $splice Could not find named fragment 'DotsInstancingVars' */
// Includes
#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl"
#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Texture.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/TextureStack.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/ShaderGraphFunctions.hlsl"
// --------------------------------------------------
// Structs and Packing
struct Attributes
{
float3 positionOS : POSITION;
float3 normalOS : NORMAL;
float4 tangentOS : TANGENT;
float4 uv0 : TEXCOORD0;
float4 color : COLOR;
#if UNITY_ANY_INSTANCING_ENABLED
uint instanceID : INSTANCEID_SEMANTIC;
#endif
};
struct Varyings
{
float4 positionCS : SV_POSITION;
float4 texCoord0;
float4 color;
#if UNITY_ANY_INSTANCING_ENABLED
uint instanceID : CUSTOM_INSTANCE_ID;
#endif
#if (defined(UNITY_STEREO_MULTIVIEW_ENABLED)) || (defined(UNITY_STEREO_INSTANCING_ENABLED) && (defined(SHADER_API_GLES3) || defined(SHADER_API_GLCORE)))
uint stereoTargetEyeIndexAsBlendIdx0 : BLENDINDICES0;
#endif
#if (defined(UNITY_STEREO_INSTANCING_ENABLED))
uint stereoTargetEyeIndexAsRTArrayIdx : SV_RenderTargetArrayIndex;
#endif
#if defined(SHADER_STAGE_FRAGMENT) && defined(VARYINGS_NEED_CULLFACE)
FRONT_FACE_TYPE cullFace : FRONT_FACE_SEMANTIC;
#endif
};
struct SurfaceDescriptionInputs
{
float4 uv0;
float3 TimeParameters;
};
struct VertexDescriptionInputs
{
float3 ObjectSpaceNormal;
float3 ObjectSpaceTangent;
float3 ObjectSpacePosition;
};
struct PackedVaryings
{
float4 positionCS : SV_POSITION;
float4 interp0 : TEXCOORD0;
float4 interp1 : TEXCOORD1;
#if UNITY_ANY_INSTANCING_ENABLED
uint instanceID : CUSTOM_INSTANCE_ID;
#endif
#if (defined(UNITY_STEREO_MULTIVIEW_ENABLED)) || (defined(UNITY_STEREO_INSTANCING_ENABLED) && (defined(SHADER_API_GLES3) || defined(SHADER_API_GLCORE)))
uint stereoTargetEyeIndexAsBlendIdx0 : BLENDINDICES0;
#endif
#if (defined(UNITY_STEREO_INSTANCING_ENABLED))
uint stereoTargetEyeIndexAsRTArrayIdx : SV_RenderTargetArrayIndex;
#endif
#if defined(SHADER_STAGE_FRAGMENT) && defined(VARYINGS_NEED_CULLFACE)
FRONT_FACE_TYPE cullFace : FRONT_FACE_SEMANTIC;
#endif
};
PackedVaryings PackVaryings (Varyings input)
{
PackedVaryings output;
output.positionCS = input.positionCS;
output.interp0.xyzw = input.texCoord0;
output.interp1.xyzw = input.color;
#if UNITY_ANY_INSTANCING_ENABLED
output.instanceID = input.instanceID;
#endif
#if (defined(UNITY_STEREO_MULTIVIEW_ENABLED)) || (defined(UNITY_STEREO_INSTANCING_ENABLED) && (defined(SHADER_API_GLES3) || defined(SHADER_API_GLCORE)))
output.stereoTargetEyeIndexAsBlendIdx0 = input.stereoTargetEyeIndexAsBlendIdx0;
#endif
#if (defined(UNITY_STEREO_INSTANCING_ENABLED))
output.stereoTargetEyeIndexAsRTArrayIdx = input.stereoTargetEyeIndexAsRTArrayIdx;
#endif
#if defined(SHADER_STAGE_FRAGMENT) && defined(VARYINGS_NEED_CULLFACE)
output.cullFace = input.cullFace;
#endif
return output;
}
Varyings UnpackVaryings (PackedVaryings input)
{
Varyings output;
output.positionCS = input.positionCS;
output.texCoord0 = input.interp0.xyzw;
output.color = input.interp1.xyzw;
#if UNITY_ANY_INSTANCING_ENABLED
output.instanceID = input.instanceID;
#endif
#if (defined(UNITY_STEREO_MULTIVIEW_ENABLED)) || (defined(UNITY_STEREO_INSTANCING_ENABLED) && (defined(SHADER_API_GLES3) || defined(SHADER_API_GLCORE)))
output.stereoTargetEyeIndexAsBlendIdx0 = input.stereoTargetEyeIndexAsBlendIdx0;
#endif
#if (defined(UNITY_STEREO_INSTANCING_ENABLED))
output.stereoTargetEyeIndexAsRTArrayIdx = input.stereoTargetEyeIndexAsRTArrayIdx;
#endif
#if defined(SHADER_STAGE_FRAGMENT) && defined(VARYINGS_NEED_CULLFACE)
output.cullFace = input.cullFace;
#endif
return output;
}
// --------------------------------------------------
// Graph
// Graph Properties
CBUFFER_START(UnityPerMaterial)
float4 Texture2D_40d3e1ffef7f43f6b3648f291bb5974d_TexelSize;
float Vector1_3b055a08b82546ffbbe80087a02fe9cb;
float Vector1_23db7fea7a93488a82f726fa778690e9;
float4 Color_cfca9819e86340599cd882083808e8c0;
CBUFFER_END
// Object and Global properties
SAMPLER(SamplerState_Linear_Repeat);
TEXTURE2D(Texture2D_40d3e1ffef7f43f6b3648f291bb5974d);
SAMPLER(samplerTexture2D_40d3e1ffef7f43f6b3648f291bb5974d);
// Graph Functions
float2 Unity_GradientNoise_Dir_float(float2 p)
{
// Permutation and hashing used in webgl-nosie goo.gl/pX7HtC
p = p % 289;
// need full precision, otherwise half overflows when p > 1
float x = float(34 * p.x + 1) * p.x % 289 + p.y;
x = (34 * x + 1) * x % 289;
x = frac(x / 41) * 2 - 1;
return normalize(float2(x - floor(x + 0.5), abs(x) - 0.5));
}
void Unity_GradientNoise_float(float2 UV, float Scale, out float Out)
{
float2 p = UV * Scale;
float2 ip = floor(p);
float2 fp = frac(p);
float d00 = dot(Unity_GradientNoise_Dir_float(ip), fp);
float d01 = dot(Unity_GradientNoise_Dir_float(ip + float2(0, 1)), fp - float2(0, 1));
float d10 = dot(Unity_GradientNoise_Dir_float(ip + float2(1, 0)), fp - float2(1, 0));
float d11 = dot(Unity_GradientNoise_Dir_float(ip + float2(1, 1)), fp - float2(1, 1));
fp = fp * fp * fp * (fp * (fp * 6 - 15) + 10);
Out = lerp(lerp(d00, d01, fp.y), lerp(d10, d11, fp.y), fp.x) + 0.5;
}
void Unity_Multiply_float(float A, float B, out float Out)
{
Out = A * B;
}
void Unity_Add_float(float A, float B, out float Out)
{
Out = A + B;
}
inline float Unity_SimpleNoise_RandomValue_float (float2 uv)
{
return frac(sin(dot(uv, float2(12.9898, 78.233)))*43758.5453);
}
inline float Unity_SimpleNnoise_Interpolate_float (float a, float b, float t)
{
return (1.0-t)*a + (t*b);
}
inline float Unity_SimpleNoise_ValueNoise_float (float2 uv)
{
float2 i = floor(uv);
float2 f = frac(uv);
f = f * f * (3.0 - 2.0 * f);
uv = abs(frac(uv) - 0.5);
float2 c0 = i + float2(0.0, 0.0);
float2 c1 = i + float2(1.0, 0.0);
float2 c2 = i + float2(0.0, 1.0);
float2 c3 = i + float2(1.0, 1.0);
float r0 = Unity_SimpleNoise_RandomValue_float(c0);
float r1 = Unity_SimpleNoise_RandomValue_float(c1);
float r2 = Unity_SimpleNoise_RandomValue_float(c2);
float r3 = Unity_SimpleNoise_RandomValue_float(c3);
float bottomOfGrid = Unity_SimpleNnoise_Interpolate_float(r0, r1, f.x);
float topOfGrid = Unity_SimpleNnoise_Interpolate_float(r2, r3, f.x);
float t = Unity_SimpleNnoise_Interpolate_float(bottomOfGrid, topOfGrid, f.y);
return t;
}
void Unity_SimpleNoise_float(float2 UV, float Scale, out float Out)
{
float t = 0.0;
float freq = pow(2.0, float(0));
float amp = pow(0.5, float(3-0));
t += Unity_SimpleNoise_ValueNoise_float(float2(UV.x*Scale/freq, UV.y*Scale/freq))*amp;
freq = pow(2.0, float(1));
amp = pow(0.5, float(3-1));
t += Unity_SimpleNoise_ValueNoise_float(float2(UV.x*Scale/freq, UV.y*Scale/freq))*amp;
freq = pow(2.0, float(2));
amp = pow(0.5, float(3-2));
t += Unity_SimpleNoise_ValueNoise_float(float2(UV.x*Scale/freq, UV.y*Scale/freq))*amp;
Out = t;
}
void Unity_TilingAndOffset_float(float2 UV, float2 Tiling, float2 Offset, out float2 Out)
{
Out = UV * Tiling + Offset;
}
void Unity_Multiply_float(float4 A, float4 B, out float4 Out)
{
Out = A * B;
}
// Graph Vertex
struct VertexDescription
{
float3 Position;
float3 Normal;
float3 Tangent;
};
VertexDescription VertexDescriptionFunction(VertexDescriptionInputs IN)
{
VertexDescription description = (VertexDescription)0;
description.Position = IN.ObjectSpacePosition;
description.Normal = IN.ObjectSpaceNormal;
description.Tangent = IN.ObjectSpaceTangent;
return description;
}
// Graph Pixel
struct SurfaceDescription
{
float3 BaseColor;
float Alpha;
};
SurfaceDescription SurfaceDescriptionFunction(SurfaceDescriptionInputs IN)
{
SurfaceDescription surface = (SurfaceDescription)0;
UnityTexture2D _Property_5f96fa6b31874c7c8f49a5ba4c802ea1_Out_0 = UnityBuildTexture2DStructNoScale(Texture2D_40d3e1ffef7f43f6b3648f291bb5974d);
float _Property_e2b4dcb7085e4752ace7d623eaa848a5_Out_0 = Vector1_23db7fea7a93488a82f726fa778690e9;
float _GradientNoise_0295ca2f6ca341b1ac796ec73bf2385e_Out_2;
Unity_GradientNoise_float(IN.uv0.xy, 3, _GradientNoise_0295ca2f6ca341b1ac796ec73bf2385e_Out_2);
float _Property_7166f06b49d84545891345939cacb632_Out_0 = Vector1_3b055a08b82546ffbbe80087a02fe9cb;
float _Multiply_bbf027acfdbb41ccaa57e62650292da4_Out_2;
Unity_Multiply_float(_Property_7166f06b49d84545891345939cacb632_Out_0, IN.TimeParameters.x, _Multiply_bbf027acfdbb41ccaa57e62650292da4_Out_2);
float _Add_31381d66d83848d381412ee3af768cad_Out_2;
Unity_Add_float(_GradientNoise_0295ca2f6ca341b1ac796ec73bf2385e_Out_2, _Multiply_bbf027acfdbb41ccaa57e62650292da4_Out_2, _Add_31381d66d83848d381412ee3af768cad_Out_2);
float _SimpleNoise_634cb24c606344d28b5e7c670c09ba7a_Out_2;
Unity_SimpleNoise_float((_Add_31381d66d83848d381412ee3af768cad_Out_2.xx), 50, _SimpleNoise_634cb24c606344d28b5e7c670c09ba7a_Out_2);
float _Multiply_8c1af9eb25a14ad7910d7c5737106dba_Out_2;
Unity_Multiply_float(_Property_e2b4dcb7085e4752ace7d623eaa848a5_Out_0, _SimpleNoise_634cb24c606344d28b5e7c670c09ba7a_Out_2, _Multiply_8c1af9eb25a14ad7910d7c5737106dba_Out_2);
float2 _Vector2_6686572d44b148c3bd43ea00a7ee71d6_Out_0 = float2(_Multiply_8c1af9eb25a14ad7910d7c5737106dba_Out_2, 1);
float2 _TilingAndOffset_80aee777cdc84f93b09a9f58f7cd8a21_Out_3;
Unity_TilingAndOffset_float(IN.uv0.xy, float2 (1, -1), _Vector2_6686572d44b148c3bd43ea00a7ee71d6_Out_0, _TilingAndOffset_80aee777cdc84f93b09a9f58f7cd8a21_Out_3);
float4 _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0 = SAMPLE_TEXTURE2D(_Property_5f96fa6b31874c7c8f49a5ba4c802ea1_Out_0.tex, _Property_5f96fa6b31874c7c8f49a5ba4c802ea1_Out_0.samplerstate, _TilingAndOffset_80aee777cdc84f93b09a9f58f7cd8a21_Out_3);
float _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_R_4 = _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0.r;
float _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_G_5 = _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0.g;
float _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_B_6 = _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0.b;
float _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_A_7 = _SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0.a;
float4 _Property_cc5ba6d85d044fb894405bde6f11b58c_Out_0 = Color_cfca9819e86340599cd882083808e8c0;
float4 _Multiply_a29ff5ef4d7049d2bb4da2beabad978e_Out_2;
Unity_Multiply_float(_SampleTexture2D_a940191ef9bb4c11a83d593387dc04f9_RGBA_0, _Property_cc5ba6d85d044fb894405bde6f11b58c_Out_0, _Multiply_a29ff5ef4d7049d2bb4da2beabad978e_Out_2);
surface.BaseColor = (_Multiply_a29ff5ef4d7049d2bb4da2beabad978e_Out_2.xyz);
surface.Alpha = 1;
return surface;
}
// --------------------------------------------------
// Build Graph Inputs
VertexDescriptionInputs BuildVertexDescriptionInputs(Attributes input)
{
VertexDescriptionInputs output;
ZERO_INITIALIZE(VertexDescriptionInputs, output);
output.ObjectSpaceNormal = input.normalOS;
output.ObjectSpaceTangent = input.tangentOS.xyz;
output.ObjectSpacePosition = input.positionOS;
return output;
}
SurfaceDescriptionInputs BuildSurfaceDescriptionInputs(Varyings input)
{
SurfaceDescriptionInputs output;
ZERO_INITIALIZE(SurfaceDescriptionInputs, output);
output.uv0 = input.texCoord0;
output.TimeParameters = _TimeParameters.xyz; // This is mainly for LW as HD overwrite this value
#if defined(SHADER_STAGE_FRAGMENT) && defined(VARYINGS_NEED_CULLFACE)
#define BUILD_SURFACE_DESCRIPTION_INPUTS_OUTPUT_FACESIGN output.FaceSign = IS_FRONT_VFACE(input.cullFace, true, false);
#else
#define BUILD_SURFACE_DESCRIPTION_INPUTS_OUTPUT_FACESIGN
#endif
#undef BUILD_SURFACE_DESCRIPTION_INPUTS_OUTPUT_FACESIGN
return output;
}
// --------------------------------------------------
// Main
#include "Packages/com.unity.render-pipelines.universal/Editor/ShaderGraph/Includes/ShaderPass.hlsl"
#include "Packages/com.unity.render-pipelines.universal/Editor/ShaderGraph/Includes/Varyings.hlsl"
#include "Packages/com.unity.render-pipelines.universal/Editor/ShaderGraph/Includes/SpriteUnlitPass.hlsl"
ENDHLSL
}
}
FallBack "Hidden/Shader Graph/FallbackError"
}
复制代码源码下载地址：Unity技术-ShaderGraph-水面倒影Shader.zip-Unity3D文档类资源-CSDN下载
👉其他
📢作者：小空和小芝中的小空
📢转载说明：务必注明来源：https://zhima.blog.csdn.net/ https://juejin.cn/user/426576084
📢欢迎点赞👍收藏🌟留言📝
【版权声明】本文为华为云社区用户原创内容，转载时必须标注文章的来源（华为云社区）、文章链接、文章作者等基本信息， 否则作者和本社区有权追究责任。如果您发现本社区中有涉嫌抄袭的内容，欢迎发送邮件进行举报，并提供相关证据，一经查实，本社区将立刻删除涉嫌侵权内容，举报邮箱：
cloudbbs@huaweicloud.com
- 点赞
- 收藏
- 关注作者
评论（0）