77 lines
2.1 KiB
PostScript
77 lines
2.1 KiB
PostScript
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/**
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* @ Version: SCREEN SPACE SHADERS - UPDATE 20
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* @ Description: SSR
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* @ Modified time: 2024-02-09 07:25
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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 "screenspace_reflections.h"
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float4x4 m_current; // Current projection matrix
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float4x4 m_previous; // Previous projection matrix
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Texture2D ssr_image;
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float4 main(p_screen I) : SV_Target
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{
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// Sample buffers and prepare all requiered data ------------------
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// Scale TexCoor
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float2 tc = I.tc0 * ssr_setup.x;
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float2 Pos2D = I.hpos * ssr_setup.x;
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// Sample buffers
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#ifndef USE_MSAA
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float4 Pos = s_position.Sample( smp_nofilter, tc );
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float gloss = s_diffuse.Sample( smp_nofilter, tc ).a;
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#else
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float4 Pos = s_position.Load( int3( Pos2D, 0 ), 0 );
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float gloss = s_diffuse.Load( int3( Pos2D, 0 ), 0 ).a;
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#endif
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// Reconstruct Position, Normal and Material
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float3 P = float3( Pos.z * ( Pos2D * pos_decompression_params.zw - pos_decompression_params.xy ), Pos.z );
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float3 N = gbuf_unpack_normal( Pos.xy );
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float mtl = gbuf_unpack_mtl( Pos.w );
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// SSR ------------------------------------------------------------
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float4 ssr_result = 0;
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// Do the SSR
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SSFX_ScreenSpaceReflections(I.tc0, float4(P, mtl), N, gloss, ssr_result, 0);
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// Accumulation ---------------------------------------------------
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float3 prev = ssr_image.Sample(smp_nofilter, I.tc0);
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// Position
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float4 P4 = float4(P, 1.0);
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// Get current
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float4 p_current = mul(m_current, P4);
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float3 current = p_current.xyz / p_current.w;
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// Get previous
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float4 p_previous = mul(m_previous, P4);
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float3 previous = p_previous.xyz / p_previous.w;
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// Depth
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float depth = 1.0 - abs(current.z / previous.z) * ssr_setup.z;
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// Velocity
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float vel = distance(current.xy, previous.xy) * 100.0f;
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// 0 Current frame ~ 1 Prev frame
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float weight = 1.0 - saturate(vel + depth);
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// Mix with previous SSR result. Higher weight more of the previous frame used
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ssr_result.rgb = lerp(ssr_result.rgb, prev, weight );
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// ----------------------------------------------------------------
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ssr_result.rgb *= ssr_result.a > 0;
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return float4(ssr_result);
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}
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