提交修改

2026-04-08 16:54:54 +08:00
parent 6d1454520c
commit 28fa6a153e
6 changed files with 289 additions and 143 deletions
--- a/Assets/DynamicClouds/Sources/DynamicClouds.shader
+++ b/Assets/DynamicClouds/Sources/DynamicClouds.shader
@@ -1,8 +1,7 @@
-Shader "DynamicClouds"
+Shader "DynamicClouds"
 {
    Properties
    {
-        //_skyColor("Color", Color) = (1,1,1,1)
        _MainTex ("Texture", 2D) = "white" {}
        _NoiseTex("Noise", 2D) = "gray" {}
        _Clouds("Top Clouds", Range(0,2)) = 0.5
@@ -18,8 +17,6 @@
        _cloudColorLight("cloud Light", Color) = (1,1,1,1)
        _cloudColorDark("cloud Dark", Color) = (0.5,0.5,0.5,1)
        _fogColor("fog Color", Color) = (1,1,1,1)
-        //_fogStart("fog Start", Range(0,1)) = 0
-        //_fogEnd("fog End", Range(0,1)) = 0
        _fog("fog", Range(0.01,1)) = 0.01
        _FadeOut("fade out", Range(0.01,1)) = 0.25
    }
@@ -50,7 +47,6 @@
                float4 vertex : SV_POSITION;
            };

-            //fixed4 _skyColor;
            sampler2D _MainTex;
            float4 _MainTex_ST;
            sampler2D _NoiseTex;
@@ -67,8 +63,6 @@
            fixed4 _cloudColorLight;
            fixed4 _cloudColorDark;
            fixed4 _fogColor;
-            //half _fogStart;
-            //half _fogEnd;
            half _fog;
            half _FadeOut;

@@ -82,113 +76,74 @@

            fixed4 frag(v2f i) : SV_Target
            {
-                //float3 sundir = float3(0, 0, 1);
-                //acos(dot(float3(i.uv.x, i.uv.y,), sundir));
+                // UV 空间下从当前像素指向太阳位置的方向。
                float2 sundir = i.uv.xy - _SunDir.xy;

-                half2 distancexy = (i.uv-0.5) * 2;// -0.5;
-                /*distancexy.x *= distancexy.x;
-                distancexy.y *= distancexy.y;
-                half distance = saturate((distancexy.x + distancexy.y) *2);*/
+                // 到天空中心的径向距离，用于地平线区域权重与淡出。
+                half2 distancexy = (i.uv - 0.5) * 2;
                half distance = saturate(length(distancexy));
-                /*fixed4 col = fixed4(distance, distance, distance,1);
-                return col; */     
+
                half cloudfactor = _Clouds * (1 - distance) + _HorizonClouds * distance;
                half cloudfactor2 = cloudfactor;
-                //i.uv += _Time.x * 0.01; //wind
+
+                // 用整体偏移和噪声扰动来驱动云层 UV 动画。
                i.uv = i.uv + _Offset;
-                i.uv += (tex2D(_NoiseTex, i.uv * 20 + _Time.x * _Turbulence).rg - 0.5) * 0.007; //turbulence
+                i.uv += (tex2D(_NoiseTex, i.uv * 20 + _Time.x * _Turbulence).rg - 0.5) * 0.007;
                i.uv /= _Scale;
+
+                // 混合两组时间错位采样，实现云形平滑变化。
                float2 shapeOffset = float2(_Time.x * _ShapeChangeSpeed, 0);
                float3 cloudtex = tex2D(_MainTex, i.uv - shapeOffset);
                cloudtex.g = tex2D(_MainTex, i.uv + shapeOffset).g;
-                float factor = tex2D(_MainTex, i.uv * 0.4 + float2(0,_Time.x * _ShapeChangeSpeed * 1.67)).b; //(_SinTime.x + 1) * 0.5;
-                float clouds = cloudtex.r * factor + cloudtex.g * (1- factor); //shape change
-                half lightst = saturate((clouds - (1 - cloudfactor))* _CloudThickness*0.5);
-                cloudfactor = saturate((clouds - (1- cloudfactor))* _CloudThickness);
+                float factor = tex2D(_MainTex, i.uv * 0.4 + float2(0, _Time.x * _ShapeChangeSpeed * 1.67)).b;
+                float clouds = cloudtex.r * factor + cloudtex.g * (1 - factor);
+
+                // 将云密度转换为透明度与受光遮罩。
+                half lightst = saturate((clouds - (1 - cloudfactor)) * _CloudThickness * 0.5);
+                cloudfactor = saturate((clouds - (1 - cloudfactor)) * _CloudThickness);
+
+                // 重建细节法线，并根据覆盖度与太阳距离增强体积感。
                half3 tnormal = UnpackNormal(tex2D(_BumpMap, i.uv - shapeOffset));
                half3 tnormal2 = UnpackNormal(tex2D(_BumpMap2, i.uv + shapeOffset));
                tnormal = tnormal * factor + tnormal2 * (1 - factor);
-                //tnormal.z *= distance*0.6 + 0.5; //lowering the z before normalizing enhances bump (at horizon bump remains the same)
-                //tnormal.z *= cloudfactor2 *cloudfactor/(1.1-clouds);
-                //tnormal.z *= 2 * cloudfactor2;
-                tnormal.z *= cloudfactor2 + 0.5 *cloudfactor2 * cloudfactor / (1.1 - clouds);
-                tnormal.z *= length(sundir * 2)+0.1;
+                tnormal.z *= cloudfactor2 + 0.5 * cloudfactor2 * cloudfactor / (1.1 - clouds);
+                tnormal.z *= length(sundir * 2) + 0.1;
                tnormal = normalize(tnormal);
-                //float lighting = (tnormal.y + 3) * 0.25;
-                //half2 clouddir = tnormal.xy;// *4;
-                //half cloudlength = clouddir.x * clouddir.x - clouddir.y * clouddir.y;
-                /*half cloudlength2 = min(cloudlength * 2, 1 - (1 - cloudlength) * (1 - cloudlength) * 2);
-                clouddir.x *= cloudlength2 / cloudlength;
-                clouddir.y *= cloudlength2 / cloudlength;
-                cloudlength = cloudlength2;*/
-                //clouddir.x = -clouddir.x;
-                //float lighting = saturate(length(sundir - clouddir * 1));
-                //half3 clouddir3 = half3(clouddir.x, clouddir.y, sqrt(1 - cloudlength));
-                /*if (clouddir3.z < 0)
-                {
-                    clouddir3.z = 0;
-                    clouddir3 = normalize(clouddir3);
-                }*/
-                //half3 sundir3 = half3(sundir3.x, sundir3.y, sqrt(1 - sundir3.x * sundir3.x - sundir3.y * sundir3.y));

+                // 基于法线与太阳方向夹角计算光照，范围归一到 [0,1]。
                half lighting = acos(dot(tnormal, sundir));
                lighting /= 3.14159265;
-                lighting = saturate(lighting * 4 - 1.5);// *5 - 2);
+                lighting = saturate(lighting * 4 - 1.5);

-                ////sundir *= 2;
-                //half sundist = length(sundir);
-                //if (sundist > 1)
-                //{
-                //    sundir *= (2 - sundist) / sundist;
-                //}
-                //half3 sundir3 = half3(sundir.x, sundir.y, sqrt(1 - sundir.x * sundir.x - sundir.y * sundir.y));
-                //if (sundist > 1)
-                //{
-                //    sundir3.z = -sundir3.z;
-                //}
-                //half lighting = acos(dot(tnormal, sundir3));
-                //lighting /= 3.14159265;
-                //lighting = saturate(lighting*3-0.1);// *4 - 1.5);// *5 - 2);
-
-                //return lighting;
-                //lighting = min(lighting, saturate(length(sundir - clouddir*0.75)));
-                half seethrough = saturate(1-length(sundir));
+                // 太阳方向上的透光增强（主要作用于较薄云层）。
+                half seethrough = saturate(1 - length(sundir));
                seethrough *= seethrough;
                seethrough *= seethrough;
                seethrough = (seethrough * seethrough + seethrough) * 0.5;
-                seethrough *= seethrough*1.5;
+                seethrough *= seethrough * 1.5;
                lighting = saturate(lighting + seethrough * (1 - lightst));
-                //lighting = lighting * cloudfactor + seethrough*(1 - cloudfactor);
-                //lighting = 1 - lighting;
-                //lighting *= cloudfactor;
-                //lighting = 1 - lighting;
-                //lighting = (lighting + 1) * 0.5;
-                float4 cloudcolor = _cloudColorLight * lighting + _cloudColorDark * (1- lighting);
-                fixed4 col = cloudcolor;// _skyColor* (1 - cloudfactor) + cloudcolor * cloudfactor;
+
+                float4 cloudcolor = _cloudColorLight * lighting + _cloudColorDark * (1 - lighting);
+                fixed4 col = cloudcolor;
                col.a = cloudfactor;
-                //s-curve:
+
+                // 使用 S 曲线重映射透明度，让云边缘更柔和。
                float factorL = cloudfactor * cloudfactor;
                float factorH = 1 - cloudfactor;
                factorH *= factorH;
                factorH = 1 - factorH;
                col.a = factorL * (1 - cloudfactor) + factorH * cloudfactor;

-                //factor = distance *distance;
-                //factor = saturate((factor -1 + _fog) / _fog);
-                /*distance = 1 - distance;
-                distance *= distance;
-                distance = 1 - distance;*/
-                factor = pow(distance, 1/ _FadeOut);
+                // 按距离向地平线方向逐渐淡出。
+                factor = pow(distance, 1 / _FadeOut);
                col.a *= 1 - factor;

-                //factor = _fogEnd * distance + _fogStart * (1 - distance);
+                // 按距离与雾颜色混合。
                factor = pow(distance, 1 / _fog);
                _fogColor.rgb = _fogColor.rgb * factor + col.rgb * (1 - factor);
-                col.rgb = _fogColor.rgb*0.5f + max(_fogColor.rgb, col.rgb)*0.5;
+                col.rgb = _fogColor.rgb * 0.5f + max(_fogColor.rgb, col.rgb) * 0.5;

                return col;
-                //return fixed4(tnormal.x, tnormal.y, tnormal.z, 1);
            }
            ENDCG
        }
--- a/Assets/DynamicClouds/Sources/DynamicClouds.shader.meta
+++ b/Assets/DynamicClouds/Sources/DynamicClouds.shader.meta
@@ -2,11 +2,7 @@ fileFormatVersion: 2
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 ShaderImporter:
  externalObjects: {}
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-  - _NoiseTex: {fileID: 2800000, guid: 3a2da7808ecbc684ba83fd32b8a15e5a, type: 3}
-  - _BumpMap: {fileID: 2800000, guid: a5264094179bdea47ab8fd32693561f2, type: 3}
-  - _BumpMap2: {fileID: 2800000, guid: 23dec0aed67708e4283769a7d516fbd1, type: 3}
+  defaultTextures: []
  nonModifiableTextures: []
  userData: 
  assetBundleName: 
--- a/Weather/Profiles/Configurations/Default
+++ b/Weather/Profiles/Configurations/Default
@@ -342,6 +342,140 @@ MonoBehaviour:
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+    flatCloudsAmbientIntensity: 1.037
+    flatCloudsShadowIntensity: 1.138
+    flatCloudsShadowSteps: 8
+    flatCloudsHGPhase: 0.8
+    flatCloudsCoverage: 1.287
+    flatCloudsDensity: 1.252
+    flatCloudsAltitude: 1
+    flatCloudsTonemapping: 0
+    flatCloudsBaseTiling: 1
+    flatCloudsDetailTiling: 10
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+  show2DCloudsControls: 0
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+  cloudFlatDetailAnim: {x: 0, y: 0}
+  cirrusAnim: {x: 0, y: 0}
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  reflectionsModule: {fileID: -3831032795633986024}
  Sky: {fileID: -1480058932494092946}
-  flatCloudModule: {fileID: 0}
+  flatCloudModule: {fileID: -3953731330329833715}
  Weather: {fileID: 8956970292728354092}
  Aurora: {fileID: 4011421771873438716}
  Audio: {fileID: 4425945063387538756}
--- a/Weather/Profiles/Quality/High.asset
+++ b/Weather/Profiles/Quality/High.asset
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  m_EditorClassIdentifier: 
-  showEditor: 0
+  showEditor: 1
  showSky: 0
  showFlatClouds: 1
  showEffects: 0
--- a/Weather/Profiles/Weather
+++ b/Weather/Profiles/Weather
@@ -12,7 +12,7 @@ MonoBehaviour:
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  m_Name: Cloudy 1
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  showEffectControls: 0
  showFlatCloudControls: 0
  showSkyControls: 0
--- a/Weather/Sample/Scene/Sample_URP.unity
+++ b/Weather/Sample/Scene/Sample_URP.unity
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  m_AmbientMode: 0
  m_SubtractiveShadowColor: {r: 0.42, g: 0.478, b: 0.627, a: 1}
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+  m_SkyboxMaterial: {fileID: 123434283}
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  m_FlareFadeSpeed: 3
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