60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
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/**
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* @ Version: SCREEN SPACE SHADERS - UPDATE 14.4
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* @ Description: 2 Layers fog ( Distance + Height )
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* @ Modified time: 2024-01-22 05:45
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* @ Author: https://www.moddb.com/members/ascii1457
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* @ Mod: https://www.moddb.com/mods/stalker-anomaly/addons/screen-space-shaders
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*/
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#include "settings_screenspace_FOG.h"
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float SSFX_HEIGHT_FOG(float3 P, float World_Py, inout float3 color)
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{
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// Get Sun dir
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float3 Sun = saturate(dot(normalize(Ldynamic_dir), -normalize(P)));
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// Apply sun color
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Sun = lerp(fog_color, Ldynamic_color.rgb, Sun);
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// Distance Fog ( Default Anomaly Fog )
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float fog = saturate(length(P) * fog_params.w + fog_params.x);
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// Height Fog
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float fogheight = smoothstep(G_FOG_HEIGHT, -G_FOG_HEIGHT, World_Py) * G_FOG_HEIGHT_INTENSITY;
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// Add the height fog to the distance fog
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float fogresult = saturate(fog + fogheight * (fog * G_FOG_HEIGHT_DENSITY));
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// Blend factor to mix sun color and fog color. Adjust intensity to.
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float FogBlend = fogheight * G_FOG_SUNCOLOR_INTENSITY;
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// Final fog color
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float3 FOG_COLOR = lerp(fog_color, Sun, FogBlend);
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// Apply fog to color
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color = lerp(color, FOG_COLOR, fogresult);
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// Return distance fog.
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return fog;
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}
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float SSFX_FOGGING(float Fog, float World_Py)
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{
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// Height fog
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float fog_height = smoothstep(G_FOG_HEIGHT, -G_FOG_HEIGHT, World_Py) * G_FOG_HEIGHT_INTENSITY;
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// Add height fog to default distance fog.
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float fog_extra = saturate(Fog + fog_height * (Fog * G_FOG_HEIGHT_DENSITY));
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return 1.0f - fog_extra;
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}
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float SSFX_CALC_FOG(float3 P)
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{
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float3 WorldP = mul(m_inv_V, float4(P.xyz, 1));
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float distance = length(P.xyz);
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float fog = saturate(distance * fog_params.w + fog_params.x); // Vanilla fog
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float fogheight = smoothstep(G_FOG_HEIGHT, -G_FOG_HEIGHT, WorldP.y) * G_FOG_HEIGHT_INTENSITY; // Height fog
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return saturate(fog + fogheight * (fog * G_FOG_HEIGHT_DENSITY));
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}
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