Unity中常用的雾效

最新推荐文章于 2024-12-22 16:44:00 发布

Joker丶12138

最新推荐文章于 2024-12-22 16:44:00 发布

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文章标签： unity 游戏引擎

本文链接：https://blog.youkuaiyun.com/m0_58594062/article/details/142960463

版权

一，距离雾

float4 unityObjectToClipPos = TransformWorldToHClip(TransformObjectToWorld(IN.posOS.xyz));
float eyeDepth = LinearEyeDepth(SHADERGRAPH_SAMPLE_SCENE_DEPTH( screenPos.xy ),_ZBufferParams);
half3 WorldPosFromDepth = ( _WorldSpaceCameraPos - ( eyeDepth * ( ( _WorldSpaceCameraPos - WorldPosition ) / screenPos.w ) ) );
float temp = saturate( ( ( distance( WorldPosFromDepth , _WorldSpaceCameraPos ) - _FogDistanceStart ) / ( _FogDistanceEnd - _FogDistanceStart ) ) );
float FogDistance = ( 1.0 - pow( ( 1.0 - abs( temp ) ) ,_FogDistanceFalloff ) );

二，高度雾

float3 depthOption = ( WorldPosFromDepth* _FogAxisOption );
float temp = saturate( ( ( distance( WorldPosFromDepth, _WorldSpaceCameraPos ) - _FogDistanceEnd ) / ( ( _FogDistanceEnd + _FarDistanceOffset ) - _FogDistanceEnd ) ) );
half FogDistanceMaskFar = pow(temp,2);
float FogHeightEdge = lerp( _FogHeightEnd , ( _FogHeightEnd + _FarDistanceHeight ) , FogDistanceMaskFar);
half FogHeightMask = pow( abs( saturate( ( (depthOption - FogHeightEdge ) / ( _FogHeightStart - FogHeightEdge ) ) ) ) , _FogHeightFalloff );

三，天空盒雾

float3 normalizeResult = normalize( ( WorldPosFromDepth - _WorldSpaceCameraPos ) )  * _FogAxisOption;
float saferPower = abs( saturate( ( ( abs( ( ( normalizeResult.x + normalizeResult.y + normalizeResult.z ) -_SkyboxFogOffset ) ) - _SkyboxFogHeight ) / ( 0.0 - _SkyboxFogHeight ) ) ); );
half SkyboxFogHeightMask = ( lerp( saturate( ( pow( saferPower , _SkyboxFogFalloff ) + ( _SkyboxFogBottom * step( temp_output_449_0_g1027 , 0.0 ) ) ) ) , 1.0 , _SkyboxFogFill) * _SkyboxFogIntensity );

四，最终效果