[WIP] water plant

Assets/Test/UnderWater/testshader.shader

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+
+Shader "zzwater/testshader"
+{
+    Properties
+    {
+        _MainTex ("Albedo (RGB)", 2D) = "white" {}
+        _SwayFreq("Sway Frequency", Range(0,10)) = 1.0
+        _SubFreq("sub Frequency", Range(0,100)) = 1.0
+        _SwayIntensity("Sway Intensity", Range(0,2)) = 0.1
+        _WindDir("Wind Direction", Vector) = (1,0,0,0)
+    }
+
+    SubShader
+    {
+        Tags 
+        { 
+            "RenderType" = "Opaque"
+            "RenderPipeline" = "UniversalPipeline"
+            "UniversalMaterialType" = "Lit"
+            "IgnoreProjector" = "True"
+        }
+        LOD 300
+
+        Pass
+        {
+            Name "ForwardLit"
+            Tags { "LightMode" = "UniversalForward" }
+            ZCLIP On
+            
+            HLSLPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            #pragma multi_compile _ _MAIN_LIGHT_SHADOWS
+            
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
+
+            struct Attributes {
+                float4 positionOS : POSITION;
+                float2 uv : TEXCOORD0;
+                float3 normalOS : NORMAL;
+                float4 color : COLOR;
+            };
+
+            struct Varyings
+            {
+                float4 positionHCS : SV_POSITION;
+                float2 uv : TEXCOORD0;
+                float3 normalWS : TEXCOORD1;
+                float4 color : TEXCOORD2;
+                float r1 : TEXCOORD3;
+            };
+
+            sampler2D _MainTex;
+            float4 _MainTex_ST;
+            half _SwayFreq;
+            half _SubFreq;
+            half _SwayIntensity;
+            float4 _WindDir;
+
+            Varyings vert (Attributes v)
+            {
+                Varyings o;
+                o.positionHCS = TransformObjectToHClip(v.positionOS.xyz);
+                o.normalWS = TransformObjectToWorldNormal(v.normalOS);
+                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
+                o.color = v.color;
+                //o.r1 = dot(unity_ObjectToWorld[3].xyz, 1);;
+
+                float3 positionWS = TransformObjectToWorld(v.positionOS.xyz);
+                o.r1 = frac(dot(positionWS, 1));
+                return o;
+            }
+
+            half4 frag (Varyings i) : SV_Target
+            {
+                half4 albedo = tex2D(_MainTex, i.uv);
+                //clip(albedo.a - 0.5);
+                return half4(i.r1,0,0, 1.0);
+                return half4(albedo.rgb, 1.0);
+                //Light mainLight = GetMainLight(TransformWorldToShadowCoord(i.positionHCS));
+                
+                // 简易光照模型[^2]
+                //half3 diffuse = mainLight.color * saturate(dot(i.normalWS, mainLight.direction));
+                //return half4(albedo.rgb * diffuse, 1.0);
+            }
+            ENDHLSL
+        }
+    }
+}