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744 lines
23 KiB
GLSL
744 lines
23 KiB
GLSL
Shader "Enviro/HDRP/Skybox"
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{
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//Properties
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//{
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//_Stars("Stars Cubemap", Cube) = "black" {}
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//_Galaxy("Galaxy Cubemap", Cube) = "black" {}
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//_SatTex("Satellites Tex", 2D) = "black" {}
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//_MoonTex("Moon Tex", 2D) = "black" {}
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//_MoonNormal("Moon Normal", 2D) = "black" {}
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//}
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HLSLINCLUDE
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//#pragma target 4.5
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#pragma editor_sync_compilation
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#pragma multi_compile __ ENVIROHDRP
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#if defined (ENVIROHDRP)
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl"
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/CommonLighting.hlsl"
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#include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"
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#include "Packages/com.unity.render-pipelines.high-definition/Runtime/Sky/SkyUtils.hlsl"
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uniform float3 _Br;
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uniform float3 _Bm;
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uniform float3 _mieG;
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uniform float _SunIntensity;
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uniform float _SkyLuminance;
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uniform float _scatteringPower;
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uniform float _SunDiskSize;
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uniform float _SunDiskIntensity;
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uniform float _StarsIntensity;
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uniform float4 _scatteringColor;
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uniform float4 _sunDiskColor;
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uniform float4x4 _StarsMatrix;
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uniform float4x4 _StarsTwinklingMatrix;
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uniform float4x4 _PixelCoordToViewDirBake;
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uniform float _SkyColorPower;
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uniform float3 _SunDir;
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uniform float3 _MoonDir;
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uniform float4 _weatherSkyMod;
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uniform float _Tonemapping;
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uniform float _SkyExposure;
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uniform float _moonGlowStrenght;
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uniform float4 _moonGlowColor;
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uniform sampler2D _MoonTex;
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uniform sampler2D _SatTex;
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uniform sampler2D _GlowTex;
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uniform float4 _MoonColor;
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uniform float4 _moonParams;
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uniform float _GalaxyIntensity;
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uniform int _blackGround;
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uniform float _MoonPhase;
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uniform float _StarsTwinkling;
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uniform float _EnviroSkyIntensity;
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uniform float4 _ambientColorMod;
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float _DitheringIntensity;
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TEXTURECUBE(_Galaxy);
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SAMPLER(sampler_Galaxy);
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TEXTURECUBE(_Stars);
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SAMPLER(sampler_Stars);
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TEXTURECUBE(_StarsTwinklingNoise);
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SAMPLER(sampler_StarsTwinklingNoise);
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struct Attributes
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{
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uint vertexID : SV_VertexID;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct Varyings
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{
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float4 positionCS : SV_POSITION;
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UNITY_VERTEX_OUTPUT_STEREO
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};
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Varyings Vert(Attributes input)
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{
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Varyings output;
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UNITY_SETUP_INSTANCE_ID(input);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
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output.positionCS = GetFullScreenTriangleVertexPosition(input.vertexID, UNITY_RAW_FAR_CLIP_VALUE);
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return output;
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}
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float MoonPhaseFactor(float2 uv, float phase)
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{
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float alpha = 1.0;
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float srefx = uv.x - 0.5;
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float refx = abs(uv.x - 0.5);
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if (phase > 0)
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{
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srefx = (1 - uv.x) - 0.5;
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refx = abs((1 - uv.x) - 0.5);
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}
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phase = abs(_moonParams.w);
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float refy = abs(uv.y - 0.5);
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float refxfory = sqrt(0.25 - refy * refy);
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float xmin = -refxfory;
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float xmax = refxfory;
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float xmin1 = (xmax - xmin) * (phase / 2) + xmin;
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float xmin2 = (xmax - xmin) * phase + xmin;
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if (srefx < xmin1)
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{
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alpha = 0;
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}
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else if (srefx < xmin2 && xmin1 != xmin2)
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{
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alpha = (srefx - xmin1) / (xmin2 - xmin1);
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}
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return alpha;
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}
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float3 ScreenSpaceDither(float2 vScreenPos, float3 clr)
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{
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float d = dot(float2(131.0, 312.0), vScreenPos.xy + _Time.y);
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float3 vDither = float3(d, d, d);
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vDither.rgb = frac(vDither.rgb / float3(103.0, 71.0, 97.0)) - float3(0.5, 0.5, 0.5);
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return (vDither.rgb / 15.0) * _DitheringIntensity * Luminance(clr);
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}
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half3 tonemapACES(half3 color, float Exposure)
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{
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color *= Exposure;
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// See https://knarkowicz.wordpress.com/2016/01/06/aces-filmic-tone-mapping-curve/
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const half a = 2.51;
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const half b = 0.03;
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const half c = 2.43;
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const half d = 0.59;
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const half e = 0.14;
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return saturate((color * (a * color + b)) / (color * (c * color + d) + e));
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}
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float4 Frag(Varyings input) : SV_Target
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{
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(input);
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float3 viewDirWS = GetSkyViewDirWS(input.positionCS.xy);
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// Reverse it to point into the scene
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float3 dir = -viewDirWS;
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//float2 screenPosition = (i.screenUV.xy / i.screenUV.w);
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float3 viewDir = normalize(-viewDirWS);
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float night = pow(max(0.0, viewDir.y), 1.25);
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float3 sky = float3(saturate(_SunDir.y + 0.25), saturate(clamp(1.0 - _SunDir.y, 0.0, 0.5)), saturate(dot(-_MoonDir.xyz, viewDir)));
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float cosTheta = dot(viewDir,_SunDir);
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float zen = acos(saturate(viewDir.y));
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float alb = (cos(zen) + 0.5 * pow(93.885 - ((zen * 180.0) / 3.141592), -0.253));
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float3 fex = exp(-(_Br * (4 / alb) + _Bm * (1.25 / alb)));
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float rayPhase = 2.5 + pow(cosTheta,1);
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float miePhase = _mieG.x / pow(_mieG.y - _mieG.z * cosTheta, 1);
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float3 BrTheta = 0.059683 * _Br * rayPhase;
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float3 BmTheta = 0.079577 * _Bm * miePhase;
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float3 BrmTheta = (BrTheta + BmTheta * 2.0) / ((_Bm + _Br) * 0.75);
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float3 scattering = BrmTheta * _SunIntensity * (1.0 - fex);
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float3 sunClr = lerp(fex, _sunDiskColor.rgb, 0.75) * _SunDiskIntensity;
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float3 sunDisk = (min(2, pow((1 - cosTheta) * (_SunDiskSize * 100), -2)) * sunClr) * (_sunDiskColor * 10);
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// Moon UV
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float3 r = normalize(cross(_MoonDir.xyz, float3(0, 0, 1)));
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float3 u = cross(_MoonDir.xyz, r);
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float2 moonUV = float2(dot(r, dir), dot(u, dir)) * (21.0 - _moonParams.x) + 0.5;
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float2 moonGlowUV = float2(dot(r, dir), dot(u, dir)) * (21.0 - _moonParams.y) + 0.5;
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float4 moonSampler = tex2D(_MoonTex, moonUV);
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float alpha = MoonPhaseFactor(moonUV, 1-_moonParams.w);
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float3 moonArea = clamp(moonSampler * 10, 0, 1);
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moonSampler = lerp(float4(0, 0, 0, 0), moonSampler, alpha);
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moonSampler = (moonSampler * _MoonColor) * 2;
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float4 moonGlow = tex2D(_GlowTex, moonGlowUV) * sky.z;
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float3 skyFinalize = saturate((pow(1.0 - fex, 2.0) * 0.234) * (1 - sky.x)) * _SkyLuminance;
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skyFinalize = saturate(lerp(float3(0.1,0.1,0.1), skyFinalize, saturate(dot(viewDir.y + 0.3, float3(0,1,0)))) * (1 - fex));
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float fadeStar = night * _StarsIntensity * 50;
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float3 starsUV = mul((float3x3)_StarsMatrix, dir);
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float3 starsMap = SAMPLE_TEXTURECUBE_LOD(_Stars, sampler_Stars, starsUV, 0).rgb;
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float3 galaxyMap = SAMPLE_TEXTURECUBE_LOD(_Galaxy, sampler_Galaxy, starsUV, 0).rgb;
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if (_StarsTwinkling > 0)
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{
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float3 starsTWUV = mul((float3x3)_StarsTwinklingMatrix, dir);
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float3 starsTwinklingMap = SAMPLE_TEXTURECUBE_LOD(_StarsTwinklingNoise, sampler_StarsTwinklingNoise, starsTWUV, 0).rgb;
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starsMap = starsMap * starsTwinklingMap;
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}
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float starsBehindMoon = 1 - clamp((moonArea * 5), 0, 1);
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float3 stars = clamp((starsMap * fadeStar) * starsBehindMoon, 0, 4);
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float3 galaxy = galaxyMap * starsBehindMoon * (night * _GalaxyIntensity);
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scattering *= saturate((lerp(float3(_scatteringPower, _scatteringPower, _scatteringPower), pow(2000.0f * BrmTheta * fex, 0.75f), sky.y) * 0.05));
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scattering *= (_SkyLuminance * _scatteringColor.rgb) * pow((1 - fex), 2) * sky.x;
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float3 skyScattering = (scattering + sunDisk) + (skyFinalize + galaxy + stars);
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skyScattering += (moonSampler.rgb * sky.z) + ((moonGlow.xyz * _moonGlowColor) * _moonParams.z) * (1 - moonSampler.a);
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skyScattering += moonSampler.rgb * sky.z;
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//Tonemapping
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if (_Tonemapping == 1)
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{
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skyScattering.rgb = tonemapACES(skyScattering.rgb, _SkyExposure);
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}
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skyScattering = pow(skyScattering,_SkyColorPower);
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skyScattering = lerp(skyScattering, (lerp(skyScattering,_weatherSkyMod.rgb,_weatherSkyMod.a)),_weatherSkyMod.a);
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//#if defined(UNITY_COLORSPACE_GAMMA)
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// skyScattering = pow(skyScattering,0.454545);
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//#endif
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if (viewDir.y < 0 && _blackGround > 0)
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skyScattering = float4(0.07,0.05,0.01,1);
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//Dithering
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skyScattering = skyScattering + ScreenSpaceDither(input.positionCS.xy, skyScattering);
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return float4(skyScattering * _EnviroSkyIntensity * GetCurrentExposureMultiplier(), 1);
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}
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float4 FragBaking(Varyings input) : SV_Target
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{
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float3 viewDirWS = GetSkyViewDirWS(input.positionCS.xy);
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float3 dir = -viewDirWS;
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float3 viewDir = normalize(-viewDirWS);
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float night = pow(max(0.0, viewDir.y), 1.25);
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float3 sky = float3(saturate(_SunDir.y + 0.25), saturate(clamp(1.0 - _SunDir.y, 0.0, 0.5)), saturate(dot(-_MoonDir.xyz, viewDir)));
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float cosTheta = dot(viewDir,_SunDir);
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float zen = acos(saturate(viewDir.y));
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float alb = (cos(zen) + 0.5 * pow(93.885 - ((zen * 180.0) / 3.141592), -0.253));
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float3 fex = exp(-(_Br * (4 / alb) + _Bm * (1.25 / alb)));
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float rayPhase = 2.5 + pow(cosTheta,1);
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float miePhase = _mieG.x / pow(_mieG.y - _mieG.z * cosTheta, 1);
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float3 BrTheta = 0.059683 * _Br * rayPhase;
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float3 BmTheta = 0.079577 * _Bm * miePhase;
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float3 BrmTheta = (BrTheta + BmTheta * 2.0) / ((_Bm + _Br) * 0.75);
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float3 scattering = BrmTheta * _SunIntensity * (1.0 - fex);
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float3 sunClr = lerp(fex, _sunDiskColor.rgb, 0.75) * _SunDiskIntensity;
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float3 sunDisk = (min(2, pow((1 - cosTheta) * (_SunDiskSize * 100), -2)) * sunClr) * (_sunDiskColor * 10);
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// Moon UV
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float3 r = normalize(cross(_MoonDir.xyz, float3(0, 0, 1)));
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float3 u = cross(_MoonDir.xyz, r);
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float2 moonUV = float2(dot(r, dir), dot(u, dir)) * (21.0 - _moonParams.x) + 0.5;
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float2 moonGlowUV = float2(dot(r, dir), dot(u, dir)) * (21.0 - _moonParams.y) + 0.5;
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float4 moonSampler = tex2D(_MoonTex, moonUV);
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float alpha = MoonPhaseFactor(moonUV, 1 - _moonParams.w);
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float3 moonArea = clamp(moonSampler * 10, 0, 1);
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moonSampler = lerp(float4(0, 0, 0, 0), moonSampler, alpha);
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moonSampler = (moonSampler * _MoonColor) * 2;
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float4 moonGlow = tex2D(_GlowTex, moonGlowUV) * sky.z;
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float3 skyFinalize = saturate((pow(1.0 - fex, 2.0) * 0.234) * (1 - sky.x)) * _SkyLuminance;
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skyFinalize = saturate(lerp(float3(0.1,0.1,0.1), skyFinalize, saturate(dot(viewDir.y + 0.3, float3(0,1,0)))) * (1 - fex));
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float fadeStar = night * _StarsIntensity * 50;
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float3 starsUV = mul((float3x3)_StarsMatrix, dir);
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float3 starsMap = SAMPLE_TEXTURECUBE_LOD(_Stars, sampler_Stars, starsUV, 0).rgb;
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float3 galaxyMap = SAMPLE_TEXTURECUBE_LOD(_Galaxy, sampler_Galaxy, starsUV, 0).rgb;
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if (_StarsTwinkling > 0)
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{
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float3 starsTWUV = mul((float3x3)_StarsTwinklingMatrix, dir);
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float3 starsTwinklingMap = SAMPLE_TEXTURECUBE_LOD(_StarsTwinklingNoise, sampler_StarsTwinklingNoise, starsTWUV, 0).rgb;
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starsMap = starsMap * starsTwinklingMap;
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}
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float starsBehindMoon = 1 - clamp((moonArea * 5), 0, 1);
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float3 stars = clamp((starsMap * fadeStar) * starsBehindMoon, 0, 4);
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float3 galaxy = galaxyMap * starsBehindMoon * (night * _GalaxyIntensity);
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scattering *= saturate((lerp(float3(_scatteringPower, _scatteringPower, _scatteringPower), pow(2000.0f * BrmTheta * fex, 0.75f), sky.y) * 0.05));
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scattering *= (_SkyLuminance * _scatteringColor.rgb) * pow((1 - fex), 2) * sky.x;
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//float3 skyScattering = (scattering + sunDisk) + (skyFinalize + galaxy + stars);
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float3 skyScattering = (scattering) + (skyFinalize + galaxy + stars);
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skyScattering += (moonSampler.rgb * sky.z) + ((moonGlow.xyz * _moonGlowColor) * _moonParams.z) * (1 - moonSampler.a);
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skyScattering += moonSampler.rgb * sky.z;
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//Tonemapping
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if (_Tonemapping == 1)
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{
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skyScattering.rgb = tonemapACES(skyScattering.rgb, _SkyExposure);
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}
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skyScattering = pow(skyScattering,_SkyColorPower);
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skyScattering = lerp(skyScattering, (lerp(skyScattering,_weatherSkyMod.rgb,_weatherSkyMod.a)),_weatherSkyMod.a);
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if (dir.y < 0 && _blackGround > 0)
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skyScattering = float4(0.07,0.05,0.01,1);
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skyScattering = lerp(skyScattering, _ambientColorMod.rgb, _ambientColorMod.a);
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//Dithering
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skyScattering = skyScattering + ScreenSpaceDither(input.positionCS.xy, skyScattering);
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return float4(skyScattering * _EnviroSkyIntensity, 1);
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}
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uniform sampler2D _CloudMap;
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uniform float _CloudAlpha;
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uniform float _CloudCoverage;
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uniform float _CloudAltitude;
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uniform float4 _CloudColor;
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uniform float _CloudColorPower;
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uniform float2 _CloudCirrusAnimation;
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Varyings VertCirrus(Attributes input)
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{
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Varyings output;
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UNITY_SETUP_INSTANCE_ID(input);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
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output.positionCS = GetFullScreenTriangleVertexPosition(input.vertexID, UNITY_RAW_FAR_CLIP_VALUE);
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return output;
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}
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float4 FragCirrus(Varyings input) : SV_Target
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{
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(input);
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float3 viewDirWS = GetSkyViewDirWS(input.positionCS.xy);
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// Reverse it to point into the scene
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float3 dir = -viewDirWS;
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float3 wpos = normalize(mul((float4x4)UNITY_MATRIX_M, dir)).xyz;
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float3 viewDir = normalize(wpos + float3(0,1,0));
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wpos.y *= 1 - dot(viewDir.y + _CloudAltitude, float3(0,-0.15,0));
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float3 uvs = normalize(wpos);
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float4 uv1;
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float4 uv2;
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uv1.xy = (uvs.xz * 0.2) + _CloudCirrusAnimation;
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uv2.xy = (uvs.xz * 0.4) + _CloudCirrusAnimation;
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float4 clouds1 = tex2D(_CloudMap, uv1.xy);
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float4 clouds2 = tex2D(_CloudMap, uv2.xy);
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float color1 = pow(clouds1.g + clouds2.g, 0.1);
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float color2 = pow(clouds2.b * clouds1.r, 0.2);
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float4 finalClouds = lerp(clouds1, clouds2, color1 * color2);
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float cloudExtinction = pow(uvs.y , 2);
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finalClouds.a *= _CloudAlpha;
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finalClouds.a *= cloudExtinction;
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if (uvs.y < 0)
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finalClouds.a = 0;
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finalClouds.rgb = finalClouds.a * pow(_CloudColor,_CloudColorPower);
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finalClouds.rgb = pow(finalClouds.rgb,1 - _CloudCoverage);
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return float4(finalClouds.rgb * _EnviroSkyIntensity * GetCurrentExposureMultiplier(), finalClouds.a);
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}
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uniform sampler2D _FlatCloudsBaseTexture;
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uniform sampler2D _FlatCloudsDetailTexture;
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uniform float4 _FlatCloudsAnimation;
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uniform float3 _FlatCloudsLightDirection;
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uniform float3 _FlatCloudsLightColor;
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uniform float3 _FlatCloudsAmbientColor;
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uniform float4 _FlatCloudsLightingParams; // x = LightIntensity, y = AmbientIntensity, z = Absorbtion, w = HgPhase
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uniform float4 _FlatCloudsParams; // x = Coverage, y = Density, z = Altitude, w = tonemapping
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uniform float4 _FlatCloudsTiling; // x = Base, y = Detail
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uniform float _CloudsExposure;
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Varyings VertFlat(Attributes input)
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{
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Varyings output;
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UNITY_SETUP_INSTANCE_ID(input);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
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output.positionCS = GetFullScreenTriangleVertexPosition(input.vertexID, UNITY_RAW_FAR_CLIP_VALUE);
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return output;
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}
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float Remap(float org_val, float org_min, float org_max, float new_min, float new_max)
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{
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return new_min + saturate(((org_val - org_min) / (org_max - org_min))*(new_max - new_min));
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}
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float HenryGreenstein(float cosTheta, float g)
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{
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float k = 3.0 / (8.0 * 3.1415926f) * (1.0 - g * g) / (2.0 + g * g);
|
|
return k * (1.0 + cosTheta * cosTheta) / pow(abs(1.0 + g * g - 2.0 * g * cosTheta), 1.5);
|
|
}
|
|
|
|
float CalculateCloudDensity(float2 posBase, float2 posDetail, float coverage)
|
|
{
|
|
float4 baseNoise = tex2D(_FlatCloudsBaseTexture, posBase);
|
|
float low_freq_fBm = (baseNoise.g * 0.625) + (baseNoise.b * 0.25) + (baseNoise.a * 0.125);
|
|
float base_cloud = Remap(baseNoise.r, -(1.0 - low_freq_fBm), 1.0, 0.0, 1.0) * coverage;
|
|
|
|
float4 detailNoise = tex2D(_FlatCloudsDetailTexture, posDetail * 2);
|
|
float high_freq_fBm = (detailNoise.r * 0.625) + (detailNoise.g * 0.25) + (detailNoise.b * 0.125);
|
|
float density = Remap(base_cloud, 1.0 - high_freq_fBm * 0.5, 1.0, 0.0, 1.0);
|
|
|
|
density *= pow(high_freq_fBm, 0.4);
|
|
density *= _FlatCloudsParams.y;
|
|
|
|
return density;
|
|
}
|
|
|
|
float4 FragFlat(Varyings input) : SV_Target
|
|
{
|
|
UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(input);
|
|
float4 col;
|
|
float3 viewDirWS = GetSkyViewDirWS(input.positionCS.xy);
|
|
// Reverse it to point into the scene
|
|
float3 dir = -viewDirWS;
|
|
|
|
float3 wpos = normalize(mul((float4x4)UNITY_MATRIX_M, dir)).xyz;
|
|
float3 viewDir = normalize(wpos + float3(0,1,0));
|
|
wpos.y *= 1 - dot(viewDir.y + _FlatCloudsParams.z, float3(0,-0.2,0));
|
|
|
|
float3 uvs = normalize(wpos);
|
|
float4 uv1;
|
|
uv1.xy = (uvs.xz * _FlatCloudsTiling.x) + _FlatCloudsAnimation.xy;
|
|
uv1.zw = (uvs.xz * _FlatCloudsTiling.y) + _FlatCloudsAnimation.zw;
|
|
|
|
float cloudExtinction = pow(uvs.y, 2);
|
|
float density = CalculateCloudDensity(uv1.xy, uv1.zw, _FlatCloudsParams.x);
|
|
|
|
//Lighting
|
|
float absorbtion = exp2(-1 * (density * _FlatCloudsLightingParams.z));
|
|
//float3 viewDir = normalize(i.worldPos - _WorldSpaceCameraPos);
|
|
float inscatterAngle = dot(normalize(_FlatCloudsLightDirection), -viewDir);
|
|
float hg = HenryGreenstein(inscatterAngle, _FlatCloudsLightingParams.w) * 2 * absorbtion;
|
|
float lighting = density * (absorbtion + hg);
|
|
float3 lightColor = pow(_FlatCloudsLightColor, 2) * (_FlatCloudsLightingParams.x );
|
|
col.rgb = lightColor * lighting;
|
|
col.rgb = col.rgb + (_FlatCloudsAmbientColor * _FlatCloudsLightingParams.y);
|
|
|
|
col.a = saturate(density * cloudExtinction);
|
|
|
|
if (uvs.y < 0)
|
|
col.a = 0;
|
|
|
|
return float4(col.rgb * _EnviroSkyIntensity * GetCurrentExposureMultiplier(), col.a);
|
|
}
|
|
|
|
|
|
|
|
///Aurora
|
|
|
|
sampler2D _Aurora_Layer_1;
|
|
sampler2D _Aurora_Layer_2;
|
|
sampler2D _Aurora_Colorshift;
|
|
|
|
float4 _AuroraColor;
|
|
float _AuroraIntensity;
|
|
float _AuroraBrightness;
|
|
float _AuroraContrast;
|
|
float _AuroraHeight;
|
|
float _AuroraScale;
|
|
float _AuroraSpeed;
|
|
float _AuroraSteps;
|
|
|
|
float4 _Aurora_Tiling_Layer1;
|
|
float4 _Aurora_Tiling_Layer2;
|
|
float4 _Aurora_Tiling_ColorShift;
|
|
|
|
Varyings VertAurora(Attributes input)
|
|
{
|
|
Varyings output;
|
|
UNITY_SETUP_INSTANCE_ID(input);
|
|
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
|
|
output.positionCS = GetFullScreenTriangleVertexPosition(input.vertexID, UNITY_RAW_FAR_CLIP_VALUE);
|
|
return output;
|
|
}
|
|
|
|
float randomNoise(float3 co) {
|
|
return frac(sin(dot(co.xyz, float3(17.2486, 32.76149, 368.71564))) * 32168.47512);
|
|
}
|
|
|
|
half4 SampleAurora(float3 uv) {
|
|
|
|
float2 uv_1 = uv.xy * _Aurora_Tiling_Layer1.xy + (_Aurora_Tiling_Layer1.zw * _AuroraSpeed * _Time.y);
|
|
|
|
half4 aurora = tex2Dlod(_Aurora_Layer_1, float4(uv_1.xy, 0, 0));
|
|
|
|
float2 uv_2 = uv_1 * _Aurora_Tiling_Layer2.xy + (_Aurora_Tiling_Layer2.zw * _AuroraSpeed * _Time.y);
|
|
half4 aurora2 = tex2Dlod(_Aurora_Layer_2, float4(uv_2.xy, 0, 0));
|
|
aurora += (aurora2 - 0.5) * 0.5;
|
|
|
|
aurora.w = aurora.w * 0.8 + 0.05;
|
|
|
|
float3 uv_3 = float3(uv.xy * _Aurora_Tiling_ColorShift.xy + (_Aurora_Tiling_ColorShift.zw * _AuroraSpeed * _Time.y), 0.0);
|
|
half4 cloudColor = tex2Dlod(_Aurora_Colorshift, float4(uv_3.xy, 0, 0));
|
|
|
|
half contrastMask = 1.0 - saturate(aurora.a);
|
|
contrastMask = pow(contrastMask, _AuroraContrast);
|
|
aurora.rgb *= lerp(half3(0, 0, 0), _AuroraColor.rgb * cloudColor.rgb * _AuroraBrightness, contrastMask);
|
|
|
|
half cloudSub = 1.0 - uv.z;
|
|
aurora.a = aurora.a - cloudSub * cloudSub;
|
|
aurora.a = saturate(aurora.a * _AuroraIntensity);
|
|
aurora.rgb *= aurora.a;
|
|
|
|
return aurora;
|
|
}
|
|
|
|
float4 FragAurora(Varyings input) : SV_Target
|
|
{
|
|
|
|
|
|
if (_AuroraIntensity < 0.05)
|
|
return float4(0,0,0,0);
|
|
|
|
UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(input);
|
|
float3 viewDirWS = GetSkyViewDirWS(input.positionCS.xy);
|
|
// Reverse it to point into the scene
|
|
//float3 dir = -viewDirWS;
|
|
|
|
float3 wpos = normalize(mul((float4x4)UNITY_MATRIX_M, -viewDirWS)).xyz;
|
|
//float3 viewDir = normalize(wpos + float3(0, 1, 0));
|
|
//float3 viewDir = normalize(wpos - _WorldSpaceCameraPos);
|
|
|
|
float3 viewDir = normalize(-viewDirWS);
|
|
|
|
float viewFalloff = 1.0 - saturate(dot(viewDir, float3(0,1,0)));
|
|
|
|
if (viewDir.y < 0 || viewDir.y > 1)
|
|
return half4(0, 0, 0, 0);
|
|
|
|
float3 traceDir = normalize(viewDir + float3(0, viewFalloff * 0.2 ,0));
|
|
|
|
float3 worldPos = _WorldSpaceCameraPos + traceDir * ((_AuroraHeight - _WorldSpaceCameraPos.y) / max(traceDir.y, 0.01));
|
|
float3 uv = float3(worldPos.xz * 0.01 * _AuroraScale, 0);
|
|
|
|
half3 uvStep = half3(traceDir.xz * -1.0 * (1.0 / traceDir.y), 1.0) * (1.0 / _AuroraSteps);
|
|
uv += uvStep * randomNoise(wpos + _SinTime.w);
|
|
|
|
half4 finalColor = half4(0,0,0,0);
|
|
|
|
[loop]
|
|
for (int i = 0; i < _AuroraSteps; i++)
|
|
{
|
|
if (finalColor.a > 1)
|
|
break;
|
|
|
|
uv += uvStep;
|
|
finalColor += SampleAurora(uv) * (1.0 - finalColor.a);
|
|
}
|
|
|
|
finalColor *= viewDir.y;
|
|
|
|
return finalColor;
|
|
|
|
}
|
|
|
|
#else
|
|
struct appdata
|
|
{
|
|
float4 vertex : POSITION;
|
|
float2 uv : TEXCOORD0;
|
|
};
|
|
|
|
struct v2f
|
|
{
|
|
float2 uv : TEXCOORD0;
|
|
float4 vertex : SV_POSITION;
|
|
};
|
|
|
|
v2f Vert (appdata v)
|
|
{
|
|
v2f o;
|
|
o.vertex = v.vertex;
|
|
o.uv = v.uv;
|
|
return o;
|
|
}
|
|
|
|
v2f VertCirrus (appdata v)
|
|
{
|
|
v2f o;
|
|
o.vertex = v.vertex;
|
|
o.uv = v.uv;
|
|
return o;
|
|
}
|
|
|
|
v2f VertFlat (appdata v)
|
|
{
|
|
v2f o;
|
|
o.vertex = v.vertex;
|
|
o.uv = v.uv;
|
|
return o;
|
|
}
|
|
|
|
v2f VertAurora (appdata v)
|
|
{
|
|
v2f o;
|
|
o.vertex = v.vertex;
|
|
o.uv = v.uv;
|
|
return o;
|
|
}
|
|
|
|
sampler2D _MainTex;
|
|
|
|
float4 FragBaking (v2f i) : SV_Target
|
|
{
|
|
float4 col = tex2D(_MainTex, i.uv);
|
|
// just invert the colors
|
|
col.rgb = 1 - col.rgb;
|
|
return col;
|
|
}
|
|
|
|
float4 Frag (v2f i) : SV_Target
|
|
{
|
|
float4 col = tex2D(_MainTex, i.uv);
|
|
// just invert the colors
|
|
col.rgb = 1 - col.rgb;
|
|
return col;
|
|
}
|
|
|
|
float4 FragCirrus (v2f i) : SV_Target
|
|
{
|
|
float4 col = tex2D(_MainTex, i.uv);
|
|
// just invert the colors
|
|
col.rgb = 1 - col.rgb;
|
|
return col;
|
|
}
|
|
|
|
float4 FragFlat (v2f i) : SV_Target
|
|
{
|
|
float4 col = tex2D(_MainTex, i.uv);
|
|
// just invert the colors
|
|
col.rgb = 1 - col.rgb;
|
|
return col;
|
|
}
|
|
|
|
float4 FragAurora (v2f i) : SV_Target
|
|
{
|
|
float4 col = tex2D(_MainTex, i.uv);
|
|
// just invert the colors
|
|
col.rgb = 1 - col.rgb;
|
|
return col;
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
|
|
ENDHLSL
|
|
|
|
|
|
|
|
|
|
SubShader
|
|
{
|
|
Tags{ "RenderPipeline" = "HDRenderPipeline" }
|
|
Pass
|
|
{
|
|
ZWrite Off
|
|
ZTest Always
|
|
Blend Off
|
|
Cull Off
|
|
|
|
HLSLPROGRAM
|
|
#pragma vertex Vert
|
|
#pragma fragment FragBaking
|
|
ENDHLSL
|
|
}
|
|
|
|
// For fullscreen Sky
|
|
Pass
|
|
{
|
|
ZWrite Off
|
|
ZTest LEqual
|
|
Blend Off
|
|
Cull Off
|
|
|
|
HLSLPROGRAM
|
|
#pragma vertex Vert
|
|
#pragma fragment Frag
|
|
ENDHLSL
|
|
}
|
|
|
|
//Cirrus Clouds
|
|
Pass
|
|
{
|
|
Blend SrcAlpha OneMinusSrcAlpha
|
|
ZWrite Off
|
|
ZTest LEqual
|
|
Cull Off
|
|
|
|
HLSLPROGRAM
|
|
#pragma vertex VertCirrus
|
|
#pragma fragment FragCirrus
|
|
#pragma target 3.0
|
|
ENDHLSL
|
|
}
|
|
|
|
//Flat Clouds
|
|
Pass
|
|
{
|
|
Blend SrcAlpha OneMinusSrcAlpha
|
|
ZWrite Off
|
|
ZTest LEqual
|
|
Cull Off
|
|
|
|
HLSLPROGRAM
|
|
#pragma vertex VertFlat
|
|
#pragma fragment FragFlat
|
|
#pragma target 3.0
|
|
ENDHLSL
|
|
}
|
|
|
|
//Aurora Pass
|
|
Pass
|
|
{
|
|
Blend One One
|
|
ZWrite Off
|
|
ZTest LEqual
|
|
Cull Off
|
|
|
|
HLSLPROGRAM
|
|
#pragma vertex VertAurora
|
|
#pragma fragment FragAurora
|
|
#pragma target 3.0
|
|
ENDHLSL
|
|
}
|
|
}
|
|
} |