107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
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/**
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* @ Description: Enhanced Shaders and Color Grading 1.10
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* @ Author: https://www.moddb.com/members/kennshade
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* @ Mod: https://www.moddb.com/mods/stalker-anomaly/addons/enhanced-shaders-and-color-grading-for-151
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*/
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#ifndef LMODEL_H
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#define LMODEL_H
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#include "common.h"
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#include "common_brdf.h"
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#include "pbr_brdf.h"
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//////////////////////////////////////////////////////////////////////////////////////////
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// Lighting formulas
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float4 compute_lighting(float3 N, float3 V, float3 L, float4 alb_gloss, float mat_id)
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{
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// [ SSS Test ]. Overwrite terrain material
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bool m_terrain = abs(mat_id - 0.95) <= 0.04f;
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if (m_terrain)
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mat_id = 0;
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float3 albedo = calc_albedo(alb_gloss, mat_id);
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float3 specular = calc_specular(alb_gloss, mat_id);
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float rough = calc_rough(alb_gloss, mat_id);
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//calc_rain(albedo, specular, rough, alb_gloss, mat_id, 1);
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calc_foliage(albedo, specular, rough, alb_gloss, mat_id);
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float3 light = Lit_BRDF(rough, albedo, specular, V, N, L );
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//if(mat_id == MAT_FLORA) //Be aware of precision loss/errors
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if(abs(mat_id-MAT_FLORA) <= MAT_FLORA_ELIPSON) //Be aware of precision loss/errors
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{
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//Simple subsurface scattering
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float3 subsurface = SSS(N,V,L);
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light.rgb += subsurface*albedo;
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}
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return float4(light, 0);
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}
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float4 plight_infinity(float m, float3 pnt, float3 normal, float4 c_tex, float3 light_direction )
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{
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//gsc vanilla stuff
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float3 N = normalize(normal); // normal
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float3 V = normalize(-pnt); // vector2eye
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float3 L = normalize(-light_direction); // vector2light
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float4 light = compute_lighting(N,V,L,c_tex,m);
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return light; // output (albedo.gloss)
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}
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float4 plight_local(float m, float3 pnt, float3 normal, float4 c_tex, float3 light_position, float light_range_rsq, out float rsqr )
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{
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float atteps = 0.1;
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float3 L2P = pnt - light_position; // light2point
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rsqr = dot(L2P,L2P); // distance 2 light (squared)
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rsqr = max(rsqr, atteps);
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//rsqr = rsqr + 1.0;
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//vanilla atten - linear
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float att = saturate(1.0 - rsqr*light_range_rsq); // q-linear attenuate
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att = SRGBToLinear(att);
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/*
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//unity atten - quadtratic
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//catlikecoding.com/unity/tutorials/custom-srp/point-and-spot-lights/
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att = rsqr * light_range_rsq;
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att *= att;
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att = saturate(1.0 - att);
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att *= att;
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att = att / rsqr;
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*/
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float3 N = normalize(normal); // normal
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float3 V = normalize(-pnt); // vector2eye
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float3 L = normalize(-L2P); // vector2light
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float4 light = compute_lighting(N,V,L,c_tex,m);
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return att*light; // output (albedo.gloss)
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}
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float3 specular_phong(float3 pnt, float3 normal, float3 light_direction)
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{
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float3 H = normalize(pnt + light_direction );
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float nDotL = saturate(dot(normal, light_direction));
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float nDotH = saturate(dot(normal, H));
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float nDotV = saturate(dot(normal, pnt));
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float lDotH = saturate(dot(light_direction, H));
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//float vDotH = saturate(dot(pnt, H));
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return L_sun_color.rgb * Lit_Specular(nDotL, nDotH, nDotV, lDotH, 0.02, 0.1);
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}
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// TODO: DX10: Remove path without blending
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half4 blendp(half4 value, float4 tcp)
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{
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return value;
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}
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half4 blend(half4 value, float2 tc)
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{
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return value;
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}
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#endif
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